shiphit.cpp

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/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on the 
 * source.
 *
*/




#include <algorithm>

#include "asteroid/asteroid.h"
#include "debris/debris.h"
#include "fireball/fireballs.h"
#include "freespace2/freespace.h"
#include "gamesequence/gamesequence.h"
#include "gamesnd/eventmusic.h"
#include "gamesnd/gamesnd.h"
#include "globalincs/linklist.h"
#include "hud/hud.h"
#include "hud/hudmessage.h"
#include "hud/hudtarget.h"
#include "iff_defs/iff_defs.h"
#include "io/joy_ff.h"
#include "io/timer.h"
#include "mission/missionlog.h"
#include "mod_table/mod_table.h"
#include "network/multi.h"
#include "network/multi_pmsg.h"
#include "network/multi_respawn.h"
#include "network/multimsgs.h"
#include "network/multiutil.h"
#include "object/object.h"
#include "object/objectdock.h"
#include "object/objectsnd.h"
#include "parse/parselo.h"
#include "parse/scripting.h"
#include "playerman/player.h"
#include "popup/popup.h"
#include "render/3d.h"
#include "ship/ship.h"
#include "ship/shipfx.h"
#include "ship/shiphit.h"
#include "weapon/beam.h"
#include "weapon/emp.h"
#include "weapon/shockwave.h"
#include "weapon/weapon.h"

//#pragma optimize("", off)
//#pragma auto_inline(off)

struct ssm_firing_info;
extern void ssm_create(object *target, vec3d *start, size_t ssm_index, ssm_firing_info *override, int team);

typedef struct spark_pair {
        int index1, index2;
        float dist;
} spark_pair;

#define MAX_SPARK_PAIRS         ((MAX_SHIP_HITS * MAX_SHIP_HITS - MAX_SHIP_HITS) / 2)

#define BIG_SHIP_MIN_RADIUS     80.0f   //      ship radius above which death rolls can't be shortened by excessive damage

vec3d   Dead_camera_pos;
vec3d   Original_vec_to_deader;

static bool global_damage = false;

//WMC - Camera rough draft stuff
/*
camid dead_get_camera()
{
        static camid dead_camera;
        if(!dead_camera.isValid())
                dead_camera = cam_create("Dead camera");

        return dead_camera;
}
*/

bool is_subsys_destroyed(ship *shipp, int submodel)
{
        ship_subsys *subsys;

        if (submodel == -1) {
                return false;
        }

        for ( subsys=GET_FIRST(&shipp->subsys_list); subsys != END_OF_LIST(&shipp->subsys_list); subsys = GET_NEXT(subsys) ) {
                if (subsys->system_info->subobj_num == submodel) {
                        if (subsys->current_hits > 0.0f) {
                                return false;
                        } else {
                                return true;
                        }
                }
        }

        return false;
}

// do_subobj_destroyed_stuff is called when a subobject for a ship is killed.  Separated out
// to separate function on 10/15/97 by MWA for easy multiplayer access.  It does all of the
// cool things like blowing off the model (if applicable, writing the logs, etc)
void do_subobj_destroyed_stuff( ship *ship_p, ship_subsys *subsys, vec3d* hitpos, bool no_explosion )
{
        ship_info *sip;
        object *ship_objp;
        model_subsystem *psub;
        vec3d   g_subobj_pos;
        int type, i, log_index;

        // get some local variables
        sip = &Ship_info[ship_p->ship_info_index];
        ship_objp = &Objects[ship_p->objnum];
        psub = subsys->system_info;
        type = psub->type;
        get_subsystem_world_pos(ship_objp, subsys, &g_subobj_pos);

        // create fireballs when subsys destroy for large ships.
        object* objp = &Objects[ship_p->objnum];

        if (!(subsys->flags & SSF_VANISHED) && !no_explosion) {
                if (objp->radius > 100.0f) {
                        // number of fireballs determined by radius of subsys
                        int num_fireballs;
                        if ( psub->radius < 3 ) {
                                num_fireballs = 1;
                        } else {
                                 num_fireballs = 5;
                        }

                        vec3d temp_vec, center_to_subsys, rand_vec;
                        vm_vec_sub(&center_to_subsys, &g_subobj_pos, &objp->pos);
                        for (i=0; i<num_fireballs; i++) {
                                if (i==0) {
                                        // make first fireball at hitpos
                                        if (hitpos) {
                                                temp_vec = *hitpos;
                                        } else {
                                                temp_vec = g_subobj_pos;
                                        }
                                } else {
                                        // make other fireballs at random positions, but try to keep on the surface
                                        vm_vec_rand_vec_quick(&rand_vec);
                                        float dot = vm_vec_dot(&center_to_subsys, &rand_vec);
                                        vm_vec_scale_add2(&rand_vec, &center_to_subsys, -dot/vm_vec_mag_squared(&center_to_subsys));
                                        vm_vec_scale_add(&temp_vec, &g_subobj_pos, &rand_vec, 0.5f*psub->radius);
                                }

                                // scale fireball size according to size of subsystem, but not less than 10
                                float fireball_rad = psub->radius * 0.2f;
                                if (fireball_rad < 10) {
                                        fireball_rad = 10.0f;
                                }

                                vec3d fb_vel;
                                vm_vec_cross(&fb_vel, &objp->phys_info.rotvel, &center_to_subsys);
                                vm_vec_add2(&fb_vel, &objp->phys_info.vel);

                                int fireball_type = fireball_ship_explosion_type(sip);
                                if(fireball_type < 0) {
                                        fireball_type = FIREBALL_EXPLOSION_MEDIUM;
                                }
                                fireball_create( &temp_vec, fireball_type, FIREBALL_MEDIUM_EXPLOSION, OBJ_INDEX(objp), fireball_rad, 0, &fb_vel );
                        }
                }
        }

        if ( MULTIPLAYER_MASTER ) {
                int index;

                index = ship_get_index_from_subsys(subsys, ship_p->objnum);
                
                vec3d hit;
                if (hitpos) {
                        hit = *hitpos;
                } else {
                        hit = g_subobj_pos;
                }
                send_subsystem_destroyed_packet( ship_p, index, hit );
        }

        // next do a quick sanity check on the current hits that we are keeping for the generic subsystems
        // I think that there might be rounding problems with the floats.  This code keeps us safe.
        if ( ship_p->subsys_info[type].type_count == 1 ) {
                ship_p->subsys_info[type].aggregate_current_hits = 0.0f;
        } else {
                float hits;
                ship_subsys *ssp;

                hits = 0.0f;
                for ( ssp=GET_FIRST(&ship_p->subsys_list); ssp != END_OF_LIST(&ship_p->subsys_list); ssp = GET_NEXT(ssp) ) {
                        // type matches?
                        if ( (ssp->system_info->type == type) && !(ssp->flags & SSF_NO_AGGREGATE) ) {
                                hits += ssp->current_hits;
                        }
                }
                ship_p->subsys_info[type].aggregate_current_hits = hits;
        }

        // store an event in the event log.  Also, determine if all turrets or all
        // engines have been destroyed (if the subsystem is a turret or engine).
        // put a disabled or disarmed entry in the log if this is the case
        // 
        // MWA -- 1/8/98  A problem was found when trying to determine (via sexpression) when some subsystems
        // were destroyed.  The bottom line is that is the psub->name and psub->subobj_name are different,
        // then direct detection doesn't work.  (This scenario happens mainly with turrets and probably with
        // engines).  So, my solution is to encode the ship_info index, and the subsystem index into one
        // integer, and pass that as the "index" parameter to add_entry.  We'll use that information to
        // print out the info in the mission log.
        Assert( ship_p->ship_info_index < 65535 );

        // get the "index" of this subsystem in the ship info structure.
        for ( i = 0; i < sip->n_subsystems; i++ ) {
                if ( &(sip->subsystems[i]) == psub )
                        break;
        }
        Assert( i < sip->n_subsystems );
        Assert( i < 65535 );
        log_index = ((ship_p->ship_info_index << 16) & 0xffff0000) | (i & 0xffff);

        // Don't log, display info, or play sounds about the activation subsytem
        // FUBAR/Goober5000 - or about vanishing subsystems, per precedent with ship-vanish
        int notify = (psub->type != SUBSYSTEM_ACTIVATION) && !(subsys->flags & SSF_VANISHED);

        if (notify) 
        {
                mission_log_add_entry(LOG_SHIP_SUBSYS_DESTROYED, ship_p->ship_name, psub->subobj_name, log_index );
                if ( ship_objp == Player_obj )
                {
                        if (!no_explosion) {
                                snd_play( &Snds[SND_SUBSYS_DIE_1], 0.0f );
                        }
                        if (strlen(psub->alt_dmg_sub_name))
                                HUD_printf(XSTR( "Your %s subsystem has been destroyed", 499), psub->alt_dmg_sub_name);
                        else {
                                char r_name[NAME_LENGTH];
                                strcpy_s(r_name, ship_subsys_get_name(subsys));
                                for (i = 0; r_name[i] > 0; i++) {
                                        if (r_name[i] == '|')
                                                r_name[i] = ' ';
                                }
                                HUD_printf(XSTR( "Your %s subsystem has been destroyed", 499), r_name );
                        }
                }
        }

        if ( psub->type == SUBSYSTEM_TURRET ) {
                if ( ship_p->subsys_info[type].aggregate_current_hits <= 0.0f ) {
                        //      Don't create "disarmed" event for small ships.
                        if (!(Ship_info[ship_p->ship_info_index].flags & SIF_SMALL_SHIP)) {
                                mission_log_add_entry(LOG_SHIP_DISARMED, ship_p->ship_name, NULL );
                                // ship_p->flags |= SF_DISARMED;
                        }
                }
        } else if (psub->type == SUBSYSTEM_ENGINE ) {
                // when an engine is destroyed, we must change the max velocity of the ship
                // to be some fraction of its normal maximum value

                if ( ship_p->subsys_info[type].aggregate_current_hits <= 0.0f ) {
                        mission_log_add_entry(LOG_SHIP_DISABLED, ship_p->ship_name, NULL );
                        ship_p->flags |= SF_DISABLED;                           // add the disabled flag
                }
        }

        if ( psub->subobj_num > -1 )    {
                shipfx_blow_off_subsystem(ship_objp,ship_p,subsys,&g_subobj_pos,no_explosion);
                subsys->submodel_info_1.blown_off = 1;
        }

        if ( (psub->subobj_num != psub->turret_gun_sobj) && (psub->turret_gun_sobj >= 0) )              {
                subsys->submodel_info_2.blown_off = 1;
        }

        if (notify && !no_explosion) {
                // play sound effect when subsys gets blown up
                int sound_index=-1;
                if ( Ship_info[ship_p->ship_info_index].flags & SIF_HUGE_SHIP ) {
                        sound_index=SND_CAPSHIP_SUBSYS_EXPLODE;
                } else if ( Ship_info[ship_p->ship_info_index].flags & SIF_BIG_SHIP ) {
                        sound_index=SND_SUBSYS_EXPLODE;
                }
                if ( sound_index >= 0 ) {
                        snd_play_3d( &Snds[sound_index], &g_subobj_pos, &View_position );
                }
        }

        // make the shipsounds work as they should...
        if(subsys->subsys_snd_flags & SSSF_ALIVE)
        {
                obj_snd_delete_type(ship_p->objnum, subsys->system_info->alive_snd, subsys);
                subsys->subsys_snd_flags &= ~SSSF_ALIVE;
        }
        if(subsys->subsys_snd_flags & SSSF_TURRET_ROTATION)
        {
                obj_snd_delete_type(ship_p->objnum, subsys->system_info->turret_base_rotation_snd, subsys);
                obj_snd_delete_type(ship_p->objnum, subsys->system_info->turret_gun_rotation_snd, subsys);
                subsys->subsys_snd_flags &= ~SSSF_TURRET_ROTATION;
        }
        if(subsys->subsys_snd_flags & SSSF_ROTATE)
        {
                obj_snd_delete_type(ship_p->objnum, subsys->system_info->rotation_snd, subsys);
                subsys->subsys_snd_flags &= ~SSSF_ROTATE;
        }
        if((subsys->system_info->dead_snd != -1) && !(subsys->subsys_snd_flags & SSSF_DEAD))
        {
                obj_snd_assign(ship_p->objnum, subsys->system_info->dead_snd, &subsys->system_info->pnt, 0, OS_SUBSYS_DEAD, subsys);
                subsys->subsys_snd_flags |= SSSF_DEAD;
        }
}

// Return weapon type that is associated with damaging_objp
// input:       damaging_objp           =>      object pointer responsible for damage
//      exit:           -1              =>      no weapon type is associated with damage object
//                              >=0     =>      weapon type associated with damage object
int shiphit_get_damage_weapon(object *damaging_objp)
{
        int weapon_info_index = -1;

        if ( damaging_objp ) {
                switch(damaging_objp->type) {
                case OBJ_WEAPON:
                        weapon_info_index = Weapons[damaging_objp->instance].weapon_info_index;
                        break;
                case OBJ_SHOCKWAVE:
                        weapon_info_index = shockwave_get_weapon_index(damaging_objp->instance);
                        break;
                case OBJ_BEAM:
                        if (Beams_use_damage_factors) {
                                weapon_info_index = beam_get_weapon_info_index(damaging_objp);
                        }
                        break;
                default:
                        weapon_info_index = -1;
                        break;
                }
        }

        return weapon_info_index;
}

//      Return range at which this object can apply damage.
//      Based on object type and subsystem type.
float subsys_get_range(object *other_obj, ship_subsys *subsys)
{
        float   range;

        Assert(subsys); // Goober5000

        if ((other_obj) && (other_obj->type == OBJ_SHOCKWAVE)) {        // Goober5000 - check for NULL when via sexp
                range = shockwave_get_max_radius(other_obj->instance) * 0.75f;  //      Shockwaves were too lethal to subsystems.
        } else if ( subsys->system_info->type == SUBSYSTEM_TURRET ) {
                range = subsys->system_info->radius*3;
        } else {
                range = subsys->system_info->radius*2;
        }

        return range;
}

#define MAX_DEBRIS_SHARDS       16              // cap the amount of debris shards that fly off per hit

// Make some random debris particles.  Previous way was not very random.  Create debris 75% of the time.
// Don't worry about multiplayer since this debris is the small stuff that cannot collide
void create_subsys_debris(object *ship_objp, vec3d *hitpos)
{
        float show_debris = frand();
        
        if ( show_debris <= 0.75f ) {
                int ndebris;

                ndebris = (int)(show_debris * Detail.num_small_debris) + 1;                     // number of pieces of debris to create

                if ( ndebris > MAX_DEBRIS_SHARDS )
                        ndebris = MAX_DEBRIS_SHARDS;

                //mprintf(( "Damage = %.1f, ndebris=%d\n", show_debris, ndebris ));
                for (int i=0; i<ndebris; i++ )  {
                        debris_create( ship_objp, -1, -1, hitpos, hitpos, 0, 1.0f );
                }
        }
}

void create_vaporize_debris(object *ship_objp, vec3d *hitpos)
{
        int ndebris;
        float show_debris = frand();

        ndebris = (int)(4.0f * ((0.5f + show_debris) * Detail.num_small_debris)) + 5;                   // number of pieces of debris to create

        if ( ndebris > MAX_DEBRIS_SHARDS ) {
                ndebris = MAX_DEBRIS_SHARDS;
        }

        //mprintf(( "Damage = %.1f, ndebris=%d\n", show_debris, ndebris ));
        for (int i=0; i<ndebris; i++ )  {
                debris_create( ship_objp, -1, -1, hitpos, hitpos, 0, 1.4f );
        }
}

#define MAX_SUBSYS_LIST 200 //DTP MAX SUBSYS LIST BUMPED FROM 32 to 200, ahmm 32???

typedef struct {
        float   dist;
        float   range;
        ship_subsys     *ptr;
} sublist;

// do_subobj_hit_stuff() is called when a collision is detected between a ship and something
// else.  This is where we see if any sub-objects on the ship should take damage.
//
//      Depending on where the collision occurs, the sub-system and surrounding hull will take 
// different amounts of damage.  The amount of damage a sub-object takes depending on how
// close the colliding object is to the center of the sub-object.  The remaining hull damage
// will be returned to the caller via the damage parameter.
//
//
// 0   -> 0.5 radius   : 100% subobject    0%  hull
// 0.5 -> 1.0 radius   :  50% subobject   50%  hull
// 1.0 -> 2.0 radius   :  25% subobject   75%  hull
//     >  2.0 radius   :   0% subobject  100%  hull
//
//
// The weapon damage is not neccesarily distributed evently between sub-systems when more than
// one sub-system is to take damage.  Whenever damage is to be assigned to a sub-system, the above
// percentages are used.  So, if more than one sub-object is taking damage, the second sub-system
// to be assigned damage will take less damage.  Eg. weapon hits in the 25% damage range of two
// subsytems, and the weapon damage is 12.  First subsystem takes 3 points damage.  Second subsystem
// will take 0.25*9 = 2.25 damage.  Should be close enough for most cases, and hull would receive 
// 0.75 * 9 = 6.75 damage.
//
//      Used to use the following constants, but now damage is linearly scaled up to 2x the subsystem
//      radius.  Same damage applied as defined by constants below.
//
//      Returns unapplied damage, which will probably be applied to the hull.
//
// Shockwave damage is handled here.  If other_obj->type == OBJ_SHOCKWAVE, it's a shockwave.
// apply the same damage to all subsystems.
//      Note: A negative damage number means to destroy the corresponding subsystem.  For example, call with -SUBSYSTEM_ENGINE to destroy engine.
//
//WMC - hull_should_apply armor means that the initial subsystem had no armor, so the hull should apply armor instead.

float do_subobj_hit_stuff(object *ship_objp, object *other_obj, vec3d *hitpos, int submodel_num, float damage, bool *hull_should_apply_armor)
{
        vec3d                   g_subobj_pos;
        float                           damage_left, damage_if_hull;
        int                             weapon_info_index;
        ship_subsys             *subsys;
        ship                            *ship_p;
        sublist                 subsys_list[MAX_SUBSYS_LIST];
        int                             subsys_hit_first = -1; // the subsys which should be hit first and take most of the damage; index into subsys_list
        vec3d                   hitpos2;
        float                   ss_dif_scale = 1.0f; // Nuke: Set a base dificulty scale for compatibility

        //WMC - first, set this to damage if it isn't NULL, in case we want to return with no damage to subsystems
        if(hull_should_apply_armor != NULL) {
                *hull_should_apply_armor = true;
        }

        Assert(ship_objp);      // Goober5000 (but other_obj might be NULL via sexp)
        Assert(hitpos);         // Goober5000

        ship_p = &Ships[ship_objp->instance];

        //      Don't damage player subsystems in a training mission.
        if ( The_mission.game_type & MISSION_TYPE_TRAINING ) {
                if (ship_objp == Player_obj){
                        return damage;
                }
        }

        //      Shockwave damage is applied like weapon damage.  It gets consumed.
        if ((other_obj != NULL) && (other_obj->type == OBJ_SHOCKWAVE))  // Goober5000 check for NULL
        {
                //      MK, 9/2/99.  Shockwaves do zero subsystem damage on small ships.
                // Goober5000 - added back in via flag
                if ((Ship_info[ship_p->ship_info_index].flags & (SIF_SMALL_SHIP)) && !(The_mission.ai_profile->flags & AIPF_SHOCKWAVES_DAMAGE_SMALL_SHIP_SUBSYSTEMS))
                        return damage;
                else {
                        damage_left = shockwave_get_damage(other_obj->instance) / 4.0f;
                        damage_if_hull = damage_left;
                }
                hitpos2 = other_obj->pos;
        } else {
                damage_left = damage;
                damage_if_hull = damage;
                hitpos2 = *hitpos;
        }

        // scale subsystem damage if appropriate
        weapon_info_index = shiphit_get_damage_weapon(other_obj);       // Goober5000 - a NULL other_obj returns -1
        if ((weapon_info_index >= 0) && ((other_obj->type == OBJ_WEAPON) ||
                                (Beams_use_damage_factors && (other_obj->type == OBJ_BEAM)))) {
                if ( Weapon_info[weapon_info_index].wi_flags2 & WIF2_TRAINING ) {
                        return damage_left;
                }
                damage_left *= Weapon_info[weapon_info_index].subsystem_factor;
                damage_if_hull *= Weapon_info[weapon_info_index].armor_factor;
        }


#ifndef NDEBUG
        float hitpos_dist = vm_vec_dist( hitpos, &ship_objp->pos );
        if ( hitpos_dist > ship_objp->radius * 2.0f )   {
                mprintf(( "BOGUS HITPOS PASSED TO DO_SUBOBJ_HIT_STUFF (%.1f > %.1f)!\nInvestigate ship %s (%s), a hit was registered on this ship outside this ship's radius.\n", hitpos_dist, ship_objp->radius * 2.0f, ship_p->ship_name, Ship_info[ship_p->ship_info_index].name ));
                // Get John ASAP!!!!  Someone passed a local coordinate instead of world for hitpos probably.
        }
#endif

        if (!global_damage) {
                create_subsys_debris(ship_objp, hitpos);
        }

        //      First, create a list of the N subsystems within range.
        //      Then, one at a time, process them in order.
        int     count = 0;
        for ( subsys=GET_FIRST(&ship_p->subsys_list); subsys != END_OF_LIST(&ship_p->subsys_list); subsys = GET_NEXT(subsys) )
        {
                model_subsystem *mss = subsys->system_info;

                //Deal with cheat correctly. If damage is the negative of the subsystem type, then we'll just kill the subsystem
                //See process_debug_keys() in keycontrol.cpp for details. 
                if (damage < 0.0f) {
                        // single player or multiplayer
                        Assert(Player_ai->targeted_subsys != NULL);
                        if ( (subsys == Player_ai->targeted_subsys) && (subsys->current_hits > 0.0f) ) {
                                Assert(mss->type == (int) -damage);
                                if (!(subsys->flags & SSF_NO_AGGREGATE)) {
                                        ship_p->subsys_info[mss->type].aggregate_current_hits -= subsys->current_hits;
                                        if (ship_p->subsys_info[mss->type].aggregate_current_hits < 0.0f) {
                                                ship_p->subsys_info[mss->type].aggregate_current_hits = 0.0f;
                                        }
                                }
                                subsys->current_hits = 0.0f;
                                do_subobj_destroyed_stuff( ship_p, subsys, hitpos );
                                continue;
                        } else {
                                continue;
                        }
                }

                if (subsys->current_hits > 0.0f) {
                        float   dist, range;

                        if (Fixed_turret_collisions && submodel_num != -1 && submodel_num == mss->turret_gun_sobj) {
                                // Special case:
                                // if the subsystem is a turret and the hit submodel is its barrel,
                                // get the distance between the hit and the turret barrel center
                                find_submodel_instance_world_point(&g_subobj_pos, ship_p->model_instance_num, submodel_num, &ship_objp->orient, &ship_objp->pos);
                                dist = vm_vec_dist_quick(&hitpos2, &g_subobj_pos);

                                // Damage attenuation range of barrel radius * 2 makes full damage
                                // be taken regardless of where the barrel is hit
                                range = submodel_get_radius(Ship_info[ship_p->ship_info_index].model_num, submodel_num) * 2;
                        } else {
                                // Default behavior:
                                // get the distance between the hit and the subsystem center
                                get_subsystem_world_pos(ship_objp, subsys, &g_subobj_pos);
                                dist = vm_vec_dist_quick(&hitpos2, &g_subobj_pos);

                                range = subsys_get_range(other_obj, subsys);
                        }

                        if ( dist < range) {
                                if (Damage_impacted_subsystem_first && submodel_num != -1 && (submodel_num == mss->subobj_num || submodel_num == mss->turret_gun_sobj)) {
                                        // If the hit impacted this subsystem's submodel, then make sure this subsys
                                        // gets dealt damage first, even if another subsystem is closer to the hit location
                                        subsys_hit_first = count;
                                }

                                if (mss->flags2 & MSS_FLAG2_COLLIDE_SUBMODEL) {
                                        if (submodel_num != -1 && submodel_num != mss->subobj_num && submodel_num != mss->turret_gun_sobj) {
                                                // If this subsystem only wants to take damage when its submodel receives
                                                // a direct hit and the current hit did not do so, skip it.
                                                continue;
                                        }
                                }

                                subsys_list[count].dist = dist;
                                subsys_list[count].range = range;
                                subsys_list[count].ptr = subsys;
                                count++;

                                if (count >= MAX_SUBSYS_LIST){
                                        break;
                                }
                        }
                }
        }

        int dmg_type_idx = -1;
        int parent_armor_flags = 0;

        if(ship_p->armor_type_idx > -1)
                parent_armor_flags = Armor_types[ship_p->armor_type_idx].flags;

        if (other_obj)
        {
                if(other_obj->type == OBJ_SHOCKWAVE) {
                        dmg_type_idx = shockwave_get_damage_type_idx(other_obj->instance);
                } else if(other_obj->type == OBJ_WEAPON) {
                        dmg_type_idx = Weapon_info[Weapons[other_obj->instance].weapon_info_index].damage_type_idx;
                } else if(other_obj->type == OBJ_BEAM) {
                        dmg_type_idx = Weapon_info[beam_get_weapon_info_index(other_obj)].damage_type_idx;
                } else if(other_obj->type == OBJ_ASTEROID) {
                        dmg_type_idx = Asteroid_info[Asteroids[other_obj->instance].asteroid_type].damage_type_idx;
                } else if(other_obj->type == OBJ_DEBRIS) {
                        dmg_type_idx = Debris[other_obj->instance].damage_type_idx;
                } else if(other_obj->type == OBJ_SHIP) {
                        dmg_type_idx = Ships[other_obj->instance].collision_damage_type_idx;
                }
        }

        //      Now scan the sorted list of subsystems in range.
        //      Apply damage to the nearest one first (exception: subsys_hit_first),
        //      subtracting off damage as we go.
        int     i, j;
        for (j=0; j<count; j++)
        {
                float   dist, range;
                ship_subsys     *subsystem;

                int     min_index = -1;

                if (Damage_impacted_subsystem_first && subsys_hit_first > -1) {
                        min_index = subsys_hit_first;

                        subsys_hit_first = -1;
                } else {
                        float   min_dist = 9999999.9f;

                        for (i=0; i<count; i++) {
                                if (subsys_list[i].dist < min_dist) {
                                        min_dist = subsys_list[i].dist;
                                        min_index = i;
                                }
                        }
                }

                Assert(min_index != -1);

                float   damage_to_apply = 0.0f;
                subsystem = subsys_list[min_index].ptr;
                range = subsys_list[min_index].range;
                dist = subsys_list[min_index].dist;
                subsys_list[min_index].dist = 9999999.9f;       //      Make sure we don't use this one again.

                Assert(range > 0.0f);   // Goober5000 - avoid div-0 below

                // only do this for the closest affected subsystem
                if ( (j == 0) && (!(parent_armor_flags & SAF_IGNORE_SS_ARMOR))) {
                        if(subsystem->armor_type_idx > -1)
                        {
                                damage = Armor_types[subsystem->armor_type_idx].GetDamage(damage, dmg_type_idx, 1.0f); // Nuke: I don't think we need to apply damage sacaling to this one, using 1.0f
                                if(hull_should_apply_armor) {
                                        *hull_should_apply_armor = false;
                                }
                        }
                }
                //      HORRIBLE HACK!
                //      MK, 9/4/99
                //      When Helios bombs are dual fired against the Juggernaut in sm3-01 (FS2), they often
                //      miss their target.  There is code dating to FS1 in the collision code to detect that a bomb or
                //      missile has somehow missed its target.  It gets its lifeleft set to 0.1 and then it detonates.
                //      Unfortunately, the shockwave damage was cut by 4 above.  So boost it back up here.
                if ((weapon_info_index >= 0) && (dist < 10.0f) && ((other_obj) && (other_obj->type == OBJ_SHOCKWAVE))) {        // Goober5000 check for NULL
                        damage_left *= 4.0f * Weapon_info[weapon_info_index].subsystem_factor;
                        damage_if_hull *= 4.0f * Weapon_info[weapon_info_index].armor_factor;                   
                }

                if ( dist < range/2.0f ) {
                        if (subsystem->flags & SSF_DAMAGE_AS_HULL)
                                damage_to_apply = damage_if_hull;
                        else
                                damage_to_apply = damage_left;
                } else if ( dist < range ) {
                        if (subsystem->flags & SSF_DAMAGE_AS_HULL)
                                damage_to_apply = damage_if_hull * (1.0f - dist/range);
                        else
                                damage_to_apply = damage_left * (1.0f - dist/range);
                }

                // if we're not in CLIENT_NODAMAGE multiplayer mode (which is a the NEW way of doing things)
                if ( (damage_to_apply > 0.1f) && !(MULTIPLAYER_CLIENT) )
                {
                        //      Decrease damage to subsystems to player ships.
                        if (ship_objp->flags & OF_PLAYER_SHIP){
                                ss_dif_scale = The_mission.ai_profile->subsys_damage_scale[Game_skill_level];
                        }
                
                        // Goober5000 - subsys guardian
                        if (subsystem->subsys_guardian_threshold > 0)
                        {
                                float min_subsys_strength = 0.01f * subsystem->subsys_guardian_threshold * subsystem->max_hits;
                                if ( (subsystem->current_hits - (damage_to_apply * ss_dif_scale)) < min_subsys_strength ) {
                                        // find damage needed to take object to min subsys strength
                                        damage_to_apply = subsystem->current_hits - min_subsys_strength;

                                        // make sure damage is positive
                                        damage_to_apply = MAX(0, damage_to_apply);
                                }
                        }

                        // decrease the damage left to apply to the ship subsystems
                        // WMC - since armor aborbs damage, subtract the amount of damage before we apply armor
                        damage_left -= (damage_to_apply * ss_dif_scale);

                        // if this subsystem doesn't carry damage then subtract it off of our total return
                        if (subsystem->system_info->flags & MSS_FLAG_CARRY_NO_DAMAGE) {
                                if ((other_obj->type != OBJ_SHOCKWAVE) || (!(subsystem->system_info->flags & MSS_FLAG_CARRY_SHOCKWAVE))) {
                                        float subsystem_factor = 0.0f;
                                        if ((weapon_info_index >= 0) && ((other_obj->type == OBJ_WEAPON) || (other_obj->type == OBJ_SHOCKWAVE))) {
                                                if (subsystem->flags & SSF_DAMAGE_AS_HULL) {
                                                        subsystem_factor = Weapon_info[weapon_info_index].armor_factor;
                                                } else {
                                                        subsystem_factor = Weapon_info[weapon_info_index].subsystem_factor;
                                                }
                                        }
                                        if (subsystem_factor > 0.0f) {
                                                damage -= ((MIN(subsystem->current_hits, (damage_to_apply * ss_dif_scale))) / subsystem_factor);
                                        } else {
                                                damage -= MIN(subsystem->current_hits, (damage_to_apply * ss_dif_scale));
                                        }
                                }
                        }

                        //Apply armor to damage
                        if (subsystem->armor_type_idx >= 0) {
                                // Nuke: this will finally factor it in to damage_to_apply and i wont need to factor it in anywhere after this
                                damage_to_apply = Armor_types[subsystem->armor_type_idx].GetDamage(damage_to_apply, dmg_type_idx, ss_dif_scale);
                        } else { // Nuke: no get damage call to apply difficulty scaling, so factor it in now
                                damage_to_apply *= ss_dif_scale;
                        }

                        subsystem->current_hits -= damage_to_apply;
                        if (!(subsystem->flags & SSF_NO_AGGREGATE)) {
                                ship_p->subsys_info[subsystem->system_info->type].aggregate_current_hits -= damage_to_apply;
                        }

                        if (subsystem->current_hits < 0.0f) {
                                damage_left -= subsystem->current_hits;
                                if (!(subsystem->flags & SSF_NO_AGGREGATE)) {
                                        ship_p->subsys_info[subsystem->system_info->type].aggregate_current_hits -= subsystem->current_hits;
                                }
                                subsystem->current_hits = 0.0f;                                 // set to 0 so repair on subsystem takes immediate effect
                        }

                        if ( ship_p->subsys_info[subsystem->system_info->type].aggregate_current_hits < 0.0f ){
                                ship_p->subsys_info[subsystem->system_info->type].aggregate_current_hits = 0.0f;
                        }

                        // multiplayer clients never blow up subobj stuff on their own
                        if ( (subsystem->current_hits <= 0.0f) && !MULTIPLAYER_CLIENT) {
                                do_subobj_destroyed_stuff( ship_p, subsystem, hitpos );
                        }

                        if (damage_left <= 0)   { // no more damage to distribute, so stop checking
                                damage_left = 0.0f;
                                break;
                        }
                }
        }

        if (damage < 0.0f) {
                damage = 0.0f;
        }

        //      Note: I changed this to return damage_left and it completely screwed up balance.
        //      It had taken a few MX-50s to destory an Anubis (with 40% hull), then it took maybe ten.
        //      So, I left it alone. -- MK, 4/15/98

        return damage;
}

// Store who/what killed the player, so we can tell the player how he died
void shiphit_record_player_killer(object *killer_objp, player *p)
{
        switch (killer_objp->type) {

        case OBJ_WEAPON:
                p->killer_objtype=OBJ_WEAPON;
                p->killer_weapon_index=Weapons[killer_objp->instance].weapon_info_index;
                p->killer_species = Ship_info[Ships[Objects[killer_objp->parent].instance].ship_info_index].species;

                if ( &Objects[killer_objp->parent] == Player_obj ) {
                        // killed by a missile?
                        if(Weapon_info[p->killer_weapon_index].subtype == WP_MISSILE){
                                p->flags |= PLAYER_FLAGS_KILLED_SELF_MISSILES;
                        } else {
                                p->flags |= PLAYER_FLAGS_KILLED_SELF_UNKNOWN;
                        }
                }

                // in multiplayer, record callsign of killer if killed by another player
                if ( (Game_mode & GM_MULTIPLAYER) && ( Objects[killer_objp->parent].flags & OF_PLAYER_SHIP) ) {
                        int pnum;

                        pnum = multi_find_player_by_object( &Objects[killer_objp->parent] );
                        if ( pnum != -1 ) {
                                strcpy_s(p->killer_parent_name, Net_players[pnum].m_player->callsign);
                        } else {
                                nprintf(("Network", "Couldn't find player object of weapon for killer of %s\n", p->callsign));
                        }
                } else {
                        strcpy_s(p->killer_parent_name, Ships[Objects[killer_objp->parent].instance].ship_name);
                        end_string_at_first_hash_symbol(p->killer_parent_name);
                }
                break;

        case OBJ_SHOCKWAVE:
                p->killer_objtype=OBJ_SHOCKWAVE;
                p->killer_weapon_index = shockwave_get_weapon_index(killer_objp->instance);
                p->killer_species = Ship_info[Ships[Objects[killer_objp->parent].instance].ship_info_index].species;

                if ( &Objects[killer_objp->parent] == Player_obj ) {
                        p->flags |= PLAYER_FLAGS_KILLED_SELF_SHOCKWAVE;
                }

                if ( (Game_mode & GM_MULTIPLAYER) && ( Objects[killer_objp->parent].flags & OF_PLAYER_SHIP) ) {
                        int pnum;

                        pnum = multi_find_player_by_object( &Objects[killer_objp->parent] );
                        if ( pnum != -1 ) {
                                strcpy_s(p->killer_parent_name, Net_players[pnum].m_player->callsign);
                        } else {
                                nprintf(("Network", "Couldn't find player object of shockwave for killer of %s\n", p->callsign));
                        }
                } else {
                        strcpy_s(p->killer_parent_name, Ships[Objects[killer_objp->parent].instance].ship_name);
                        end_string_at_first_hash_symbol(p->killer_parent_name);
                }
                break;

        case OBJ_SHIP:
                p->killer_objtype=OBJ_SHIP;
                p->killer_weapon_index=-1;
                p->killer_species = Ship_info[Ships[killer_objp->instance].ship_info_index].species;

                if ( Ships[killer_objp->instance].flags & SF_EXPLODED ) {
                        p->flags |= PLAYER_FLAGS_KILLED_BY_EXPLOSION;
                }

                if ( Ships[Objects[p->objnum].instance].wash_killed ) {
                        p->flags |= PLAYER_FLAGS_KILLED_BY_ENGINE_WASH;
                }

                // in multiplayer, record callsign of killer if killed by another player
                if ( (Game_mode & GM_MULTIPLAYER) && (killer_objp->flags & OF_PLAYER_SHIP) ) {
                        int pnum;

                        pnum = multi_find_player_by_object( killer_objp );
                        if ( pnum != -1 ) {
                                strcpy_s(p->killer_parent_name, Net_players[pnum].m_player->callsign);
                        } else {
                                nprintf(("Network", "Couldn't find player object for killer of %s\n", p->callsign));
                        }
                } else {
                        strcpy_s(p->killer_parent_name, Ships[killer_objp->instance].ship_name);
                        end_string_at_first_hash_symbol(p->killer_parent_name);
                }
                break;
        
        case OBJ_DEBRIS:
        case OBJ_ASTEROID:
                if ( killer_objp->type == OBJ_DEBRIS ) {
                        p->killer_objtype = OBJ_DEBRIS;
                } else {
                        p->killer_objtype = OBJ_ASTEROID;
                }
                p->killer_weapon_index=-1;
                p->killer_species = -1;
                p->killer_parent_name[0] = '\0';
                break;

        case OBJ_BEAM:
                int beam_obj;
                beam_obj = beam_get_parent(killer_objp);
                p->killer_species = -1;         
                p->killer_objtype = OBJ_BEAM;
                if(beam_obj != -1){                     
                        if((Objects[beam_obj].type == OBJ_SHIP) && (Objects[beam_obj].instance >= 0)){
                                strcpy_s(p->killer_parent_name, Ships[Objects[beam_obj].instance].ship_name);
                                end_string_at_first_hash_symbol(p->killer_parent_name);
                        }
                        p->killer_species = Ship_info[Ships[Objects[beam_obj].instance].ship_info_index].species;
                } else {                        
                        strcpy_s(p->killer_parent_name, "");
                }
                break;
        
        case OBJ_NONE:
                if ( Game_mode & GM_MULTIPLAYER ) {
                        Int3();
                }
                p->killer_objtype=-1;
                p->killer_weapon_index=-1;
                p->killer_parent_name[0]=0;
                p->killer_species = -1;
                break;

        default:
                Int3();
                break;
        }
}

//      Say dead stuff.
void show_dead_message(object *ship_objp, object *other_obj)
{
        player *player_p;

        // not doing anything when a non player dies.
        if ( !(ship_objp->flags & OF_PLAYER_SHIP) ){
                return;
        }

        if(other_obj == NULL){
                return;
        }

        // Get a pointer to the player (we are assured a player ship was killed)
        if ( Game_mode & GM_NORMAL ) {
                player_p = Player;
        } else {
                // in multiplayer, get a pointer to the player that died.
                int pnum = multi_find_player_by_object( ship_objp );
                if ( pnum == -1 ) {
                        return;
                }
                player_p = Net_players[pnum].m_player;
        }

        // multiplayer clients should already have this information.
        if ( !MULTIPLAYER_CLIENT ){
                shiphit_record_player_killer( other_obj, player_p );
        }

        // display a hud message is the guy killed isn't me (multiplayer only)
        /*
        if ( (Game_mode & GM_MULTIPLAYER) && (ship_obj != Player_obj) ) {
                char death_text[256];

                player_generate_death_text( player_p, death_text );
                HUD_sourced_printf(HUD_SOURCE_HIDDEN, death_text);
        }
        */
}

/* JAS: THIS DOESN'T SEEM TO BE USED, SO I COMMENTED IT OUT
//      Apply damage to a ship, destroying if necessary, etc.
//      Returns portion of damage that exceeds ship shields, ie the "unused" portion of the damage.
//      Note: This system does not use the mesh shield.  It applies damage to the overall ship shield.
float apply_damage_to_ship(object *objp, float damage)
{
        float   _ss;

        add_shield_strength(objp, -damage);

        // check if shields are below 0%, if so take leftover damage and apply to ship integrity
        if ((_ss = get_shield_strength(objp)) < 0.0f ) {
                damage = -_ss;
                set_shield_strength(objp, 0.0f);
        } else
                damage = 0.0f;

        return damage;
}
*/

//      Do music processing for a ship hit.
void ship_hit_music(object *ship_objp, object *other_obj)
{
        Assert(ship_objp);      // Goober5000
        Assert(other_obj);      // Goober5000

        ship* ship_p = &Ships[ship_objp->instance];
        object *parent;

        // Switch to battle track when a ship is hit by fire 
        //
        // If the ship hit has an AI class of none, it is a Cargo, NavBuoy or other non-aggressive
        // ship, so don't start the battle music        
        if (!stricmp(Ai_class_names[Ai_info[ship_p->ai_index].ai_class], NOX("none")))
                return;

        // Only start if ship hit and firing ship are from different teams
        int attackee_team, attacker_team;

        attackee_team = Ships[ship_objp->instance].team;

        // avoid uninitialized value by matching them
        attacker_team = attackee_team;

        switch ( other_obj->type )
        {
                case OBJ_SHIP:
                        attacker_team = Ships[other_obj->instance].team;

                        // Nonthreatening ship collided with ship, no big deal
                        if ( !stricmp(Ai_class_names[Ai_info[Ships[other_obj->instance].ai_index].ai_class], NOX("none")) )
                                return;

                        break;

                case OBJ_WEAPON:
                        // parent of weapon is object num of ship that fired it
                        parent = &Objects[other_obj->parent];
                        if (parent->signature == other_obj->parent_sig)
                                attacker_team = Ships[parent->instance].team;
                        break;

                default:
                        // Unexpected object type collided with ship, no big deal.
                        return;
        }

        // start the music if it was an attacking ship
        if (iff_x_attacks_y(attacker_team, attackee_team))
                event_music_battle_start();
}

//      Make sparks fly off a ship.
// Currently used in misison_parse to create partially damaged ships.
// NOTE: hitpos is in model coordinates on the detail[0] submodel (highest detail hull)
// WILL NOT WORK RIGHT IF ON A ROTATING SUBMODEL
void ship_hit_sparks_no_rotate(object *ship_objp, vec3d *hitpos)
{
        ship            *ship_p = &Ships[ship_objp->instance];

        int n = ship_p->num_hits;
        if (n >= MAX_SHIP_HITS) {
                n = rand() % MAX_SHIP_HITS;
        } else {
                ship_p->num_hits++;
        }

        // No rotation.  Just make the spark
        ship_p->sparks[n].pos = *hitpos;
        ship_p->sparks[n].submodel_num = -1;

        shipfx_emit_spark(ship_objp->instance, n);              // Create the first wave of sparks

        if ( n == 0 )   {
                ship_p->next_hit_spark = timestamp(0);          // when a hit spot will spark
        }
}

// find the max number of sparks allowed for ship
// limited for fighter by hull % others by radius.
int get_max_sparks(object* ship_objp)
{
        Assert(ship_objp->type == OBJ_SHIP);
        Assert((ship_objp->instance >= 0) && (ship_objp->instance < MAX_SHIPS));
        if(ship_objp->type != OBJ_SHIP){
                return 1;
        }
        if((ship_objp->instance < 0) || (ship_objp->instance >= MAX_SHIPS)){
                return 1;
        }

        ship *ship_p = &Ships[ship_objp->instance];
        ship_info* si = &Ship_info[ship_p->ship_info_index];
        if (si->flags & SIF_FIGHTER) {
                float hull_percent = ship_objp->hull_strength / ship_p->ship_max_hull_strength;

                if (hull_percent > 0.8f) {
                        return 1;
                } else if (hull_percent > 0.3f) {
                        return 2;
                } else {
                        return 3;
                }
        } else {
                int num_sparks = (int) (ship_objp->radius * 0.08f);
                if (num_sparks < 3) {
                        return 3;
                } else if (num_sparks > MAX_SHIP_HITS) {
                        return MAX_SHIP_HITS;
                } else {
                        return num_sparks;
                }
        }
}


// helper function to std::sort, sorting spark pairs by distance
int spark_compare(const spark_pair &pair1, const spark_pair &pair2)
{
        Assert(pair1.dist >= 0);
        Assert(pair2.dist >= 0);

        return (pair1.dist < pair2.dist);
}

// for big ships, when all spark slots are filled, make intelligent choice of one to be recycled
int choose_next_spark(object *ship_objp, vec3d *hitpos)
{
        int i, j, count, num_sparks, num_spark_pairs, spark_num;
        vec3d world_hitpos[MAX_SHIP_HITS];
        spark_pair spark_pairs[MAX_SPARK_PAIRS];
        ship *shipp = &Ships[ship_objp->instance];

        // only choose next spark when all slots are full
        Assert(get_max_sparks(ship_objp) == Ships[ship_objp->instance].num_hits);

        // get num_sparks
        num_sparks = shipp->num_hits;
        Assert(num_sparks <= MAX_SHIP_HITS);

        // get num_spark_paris -- only sort these
        num_spark_pairs = (num_sparks * num_sparks - num_sparks) / 2;

        // get the world hitpos for all sparks
        for (spark_num=0; spark_num<num_sparks; spark_num++) {
                if (shipp->sparks[spark_num].submodel_num != -1) {
                        model_instance_find_world_point(&world_hitpos[spark_num], &shipp->sparks[spark_num].pos, shipp->model_instance_num, shipp->sparks[spark_num].submodel_num, &ship_objp->orient, &ship_objp->pos);
                } else {
                        // rotate sparks correctly with current ship orient
                        vm_vec_unrotate(&world_hitpos[spark_num], &shipp->sparks[spark_num].pos, &ship_objp->orient);
                        vm_vec_add2(&world_hitpos[spark_num], &ship_objp->pos);
                }
        }

        // check we're not making a spark in the same location as a current one
        for (i=0; i<num_sparks; i++) {
                float dist = vm_vec_dist_squared(&world_hitpos[i], hitpos);
                if (dist < 1) {
                        return i;
                }
        }

        // not same location, so maybe do random recyling
        if (frand() > 0.5f) {
                return (rand() % num_sparks);
        }

        // initialize spark pairs
        for (i=0; i<num_spark_pairs; i++) {
                spark_pairs[i].index1 = 0;
                spark_pairs[i].index2 = 0;
                spark_pairs[i].dist = FLT_MAX;
        }

        // set spark pairs
        count = 0;
        for (i=1; i<num_sparks; i++) {
                for (j=0; j<i; j++) {
                        spark_pairs[count].index1 = i;
                        spark_pairs[count].index2 = j;
                        spark_pairs[count++].dist = vm_vec_dist_squared(&world_hitpos[i], &world_hitpos[j]);
                }
        }
        Assert(count == num_spark_pairs);

        // sort pairs
        std::sort(spark_pairs, spark_pairs + count, spark_compare);
        //mprintf(("Min spark pair dist %.1f\n", spark_pairs[0].dist));

        // look through the first few sorted pairs, counting number of indices of closest pair
        int index1 = spark_pairs[0].index1;
        int index2 = spark_pairs[0].index2;
        int count1 = 0;
        int count2 = 0;

        for (i=1; i<6; i++) {
                if (spark_pairs[i].index1 == index1) {
                        count1++;
                }
                if (spark_pairs[i].index2 == index1) {
                        count1++;
                }
                if (spark_pairs[i].index1 == index2) {
                        count2++;
                }
                if (spark_pairs[i].index2 == index2) {
                        count2++;
                }
        }

        // recycle spark which has most indices in sorted list of pairs
        if (count1 > count2) {
                return index1;
        } else {
                return index2;
        }
}


//      Make sparks fly off a ship.
void ship_hit_create_sparks(object *ship_objp, vec3d *hitpos, int submodel_num)
{
        vec3d   tempv;
        ship    *shipp = &Ships[ship_objp->instance];
        ship_info       *sip = &Ship_info[shipp->ship_info_index];

        int n, max_sparks;

        n = shipp->num_hits;
        max_sparks = get_max_sparks(ship_objp);

        if (n >= max_sparks)    {
                if (sip->flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) {
                        // large ship, choose intelligently
                        n = choose_next_spark(ship_objp, hitpos);
                } else {
                        // otherwise, normal choice
                        n = rand() % max_sparks;
                }
        } else {
                shipp->num_hits++;
        }

        bool instancing = false;
        // decide whether to do instancing
        if (submodel_num != -1) {
                polymodel *pm = model_get(sip->model_num);
                if (pm->detail[0] != submodel_num) {
                        // submodel is not hull
                        // OPTIMIZE ... check if submodel can not rotate
                        instancing = true;
                }
        }

        if (instancing) {
                // get the hit position in the subobject RF
                vec3d temp_zero, temp_x, temp_y, temp_z;
                model_instance_find_world_point(&temp_zero, &vmd_zero_vector, shipp->model_instance_num, submodel_num, &ship_objp->orient, &ship_objp->pos);
                model_instance_find_world_point(&temp_x, &vmd_x_vector, shipp->model_instance_num, submodel_num, &ship_objp->orient, &ship_objp->pos);
                model_instance_find_world_point(&temp_y, &vmd_y_vector, shipp->model_instance_num, submodel_num, &ship_objp->orient, &ship_objp->pos);
                model_instance_find_world_point(&temp_z, &vmd_z_vector, shipp->model_instance_num, submodel_num, &ship_objp->orient, &ship_objp->pos);

                // find submodel x,y,z axes
                vm_vec_sub2(&temp_x, &temp_zero);
                vm_vec_sub2(&temp_y, &temp_zero);
                vm_vec_sub2(&temp_z, &temp_zero);

                // find displacement from submodel origin
                vec3d diff;
                vm_vec_sub(&diff, hitpos, &temp_zero);

                // find displacement from submodel origin in submodel RF
                shipp->sparks[n].pos.xyz.x = vm_vec_dot(&diff, &temp_x);
                shipp->sparks[n].pos.xyz.y = vm_vec_dot(&diff, &temp_y);
                shipp->sparks[n].pos.xyz.z = vm_vec_dot(&diff, &temp_z);
                shipp->sparks[n].submodel_num = submodel_num;
                shipp->sparks[n].end_time = timestamp(-1);
        } else {
                // Rotate hitpos into ship_objp's frame of reference.
                vm_vec_sub(&tempv, hitpos, &ship_objp->pos);
                vm_vec_rotate(&shipp->sparks[n].pos, &tempv, &ship_objp->orient);
                shipp->sparks[n].submodel_num = -1;
                shipp->sparks[n].end_time = timestamp(-1);
        }

        // Create the first wave of sparks
        shipfx_emit_spark(ship_objp->instance, n);

        if ( n == 0 )   {
                shipp->next_hit_spark = timestamp(0);           // when a hit spot will spark
        }
}

//      Called from ship_hit_kill() when we detect the player has been killed.
void player_died_start(object *killer_objp)
{
        nprintf(("Network", "starting my player death\n"));
        gameseq_post_event(GS_EVENT_DEATH_DIED);        
        
/*      vm_vec_scale_add(&Dead_camera_pos, &Player_obj->pos, &Player_obj->orient.fvec, -10.0f);
        vm_vec_scale_add2(&Dead_camera_pos, &Player_obj->orient.uvec, 3.0f);
        vm_vec_scale_add2(&Dead_camera_pos, &Player_obj->orient.rvec, 5.0f);
*/

        //      Create a good vector for the camera to move along during death sequence.
        object  *other_objp = NULL;

        // on multiplayer clients, there have been occasions where we haven't been able to determine
        // the killer of a ship (due to bogus/mismatched/timed-out signatures on the client side).  If
        // we don't know the killer, use the Player_obj as the other_objp for camera position.
        if ( killer_objp ) {
                switch (killer_objp->type) {
                case OBJ_WEAPON:
                case OBJ_SHOCKWAVE:
                        other_objp = &Objects[killer_objp->parent];
                        break;
                case OBJ_SHIP:
                case OBJ_DEBRIS:
                case OBJ_ASTEROID:
                case OBJ_NONE:  //      Something that just got deleted due to also dying -- it happened to me! --MK.           
                        other_objp = killer_objp;
                        break;

                case OBJ_BEAM:
                        int beam_obj_parent;
                        beam_obj_parent = beam_get_parent(killer_objp);
                        if(beam_obj_parent == -1){
                                other_objp = killer_objp;
                        } else {
                                other_objp = &Objects[beam_obj_parent];
                        }
                        break;

                default:
                        Int3();         //      Killed by an object of a peculiar type.  What is it?
                        other_objp = killer_objp;       //      Enable to continue, just in case we shipped it with this bug...
                }
        } else {
                other_objp = Player_obj;
        }

        vm_vec_add(&Original_vec_to_deader, &Player_obj->orient.vec.fvec, &Player_obj->orient.vec.rvec);
        vm_vec_scale(&Original_vec_to_deader, 2.0f);
        vm_vec_add2(&Original_vec_to_deader, &Player_obj->orient.vec.uvec);
        vm_vec_normalize(&Original_vec_to_deader);

        vec3d   vec_from_killer;
        vec3d   *side_vec;
        float           dist;

        Assert(other_objp != NULL);

        if (Player_obj == other_objp) {
                dist = 50.0f;
                vec_from_killer = Player_obj->orient.vec.fvec;
        } else {
                dist = vm_vec_normalized_dir(&vec_from_killer, &Player_obj->pos, &other_objp->pos);
        }

        if (dist > 100.0f)
                dist = 100.0f;
        vm_vec_scale_add(&Dead_camera_pos, &Player_obj->pos, &vec_from_killer, dist);

        float   dot = vm_vec_dot(&Player_obj->orient.vec.rvec, &vec_from_killer);
        if (fl_abs(dot) > 0.8f)
                side_vec = &Player_obj->orient.vec.fvec;
        else
                side_vec = &Player_obj->orient.vec.rvec;
        
        vm_vec_scale_add2(&Dead_camera_pos, side_vec, 10.0f);

        Player_ai->target_objnum = -1;          //      Clear targeting.  Otherwise, camera pulls away from player as soon as he blows up.

        // stop any playing emp effect
        emp_stop_local();
}


//#define       DEATHROLL_TIME                                          3000                    //      generic deathroll is 3 seconds (3 * 1000 milliseconds) - Moved to ships.tbl
#define MIN_PLAYER_DEATHROLL_TIME               1000                    // at least one second deathroll for a player
#define DEATHROLL_ROTVEL_CAP                            6.3f                    // maximum added deathroll rotvel in rad/sec (about 1 rev / sec)
#define DEATHROLL_ROTVEL_MIN                            0.8f                    // minimum added deathroll rotvel in rad/sec (about 1 rev / 12 sec)
#define DEATHROLL_MASS_STANDARD                 50                              // approximate mass of lightest ship
#define DEATHROLL_VELOCITY_STANDARD     70                              // deathroll rotvel is scaled according to ship velocity
#define DEATHROLL_ROTVEL_SCALE                  4                               // constant determines how quickly deathroll rotvel is ramped up  (smaller is faster)

void saturate_fabs(float *f, float max)
{
        if ( fl_abs(*f) > max) {
                if (*f > 0.0f)
                        *f = max;
                else
                        *f = -max;
        }
}

// function to do generic things when a ship explodes
void ship_generic_kill_stuff( object *objp, float percent_killed )
{
        float rotvel_mag;
        int     delta_time;
        ship    *sp;

        Assert(objp->type == OBJ_SHIP);
        Assert(objp->instance >= 0 && objp->instance < MAX_SHIPS );
        if((objp->type != OBJ_SHIP) || (objp->instance < 0) || (objp->instance >= MAX_SHIPS)){
                return;
        }
        sp = &Ships[objp->instance];
        ship_info *sip = &Ship_info[sp->ship_info_index];

        ai_announce_ship_dying(objp);

        ship_stop_fire_primary(objp);   //mostly for stopping fighter beam looping sounds -Bobboau

        sp->flags |= SF_DYING;
        objp->phys_info.flags |= (PF_DEAD_DAMP | PF_REDUCED_DAMP);
        delta_time = (int) (sip->death_roll_base_time);

        //      For smaller ships, subtract off time proportional to excess damage delivered.
        if (objp->radius < BIG_SHIP_MIN_RADIUS)
                delta_time -=  (int) (1.01f - 4*percent_killed);

        //      Cut down cargo death rolls.  Looks a little silly. -- MK, 3/30/98.
        if (sip->flags & SIF_CARGO) {
                delta_time /= 4;
        }
        
        //      Prevent bogus timestamps.
        if (delta_time < 2)
                delta_time = 2;
        
        if (objp->flags & OF_PLAYER_SHIP) {
                //      Note: Kamikaze ships have no minimum death time.
                if (!(Ai_info[Ships[objp->instance].ai_index].ai_flags & AIF_KAMIKAZE) && (delta_time < MIN_PLAYER_DEATHROLL_TIME))
                        delta_time = MIN_PLAYER_DEATHROLL_TIME;
        }

        //nprintf(("AI", "ShipHit.cpp: Frame %i, Gametime = %7.3f, Ship %s will die in %7.3f seconds.\n", Framecount, f2fl(Missiontime), Ships[objp->instance].ship_name, (float) delta_time/1000.0f));

        //      Make big ships have longer deathrolls.
        //      This is debug code by MK to increase the deathroll time so ships have time to evade the shockwave.
        //      Perhaps deathroll time should be specified in ships.tbl.
        float damage = ship_get_exp_damage(objp);

        if (damage >= 250.0f)
                delta_time += 3000 + (int)(damage*4.0f + 4.0f*objp->radius);

        if (Ai_info[sp->ai_index].ai_flags & AIF_KAMIKAZE)
                delta_time = 2;

        // Knossos gets 7-10 sec to die, time for "little" explosions
        if (Ship_info[sp->ship_info_index].flags & SIF_KNOSSOS_DEVICE) {
                delta_time = 7000 + (int)(frand() * 3000.0f);
                Ship_info[sp->ship_info_index].explosion_propagates = 0;
        }

        // Goober5000 - ship-specific deathroll time, woot
        if (sp->special_exp_deathroll_time > 0)
        {
                delta_time = sp->special_exp_deathroll_time;

                // prevent bogus timestamps, per comment several lines up
                if (delta_time < 2)
                        delta_time = 2;
        }

        sp->death_time = sp->final_death_time = timestamp(delta_time);  // Give him 3 secs to explode

        //SUSHI: What are the chances of an instant vaporization? Check the ship type first (objecttypes.tbl), then the ship (ships.tbl)
        ship_type_info *stp = &Ship_types[sip->class_type];
        float vapChance = stp->vaporize_chance;
        if (sip->vaporize_chance > 0.0f)
                vapChance = sip->vaporize_chance;

        if (sp->flags & SF_VAPORIZE || frand() < vapChance) {
                // Assert(Ship_info[sp->ship_info_index].flags & SIF_SMALL_SHIP);

                // LIVE FOR 100 MS
                sp->final_death_time = timestamp(100);
        }

        //nprintf(("AI", "Time = %7.3f: final_death_time set to %7.3f\n", (float) timestamp_ticker/1000.0f, (float) sp->final_death_time/1000.0f));

        sp->pre_death_explosion_happened = 0;                           // The little fireballs haven't came in yet.

        sp->next_fireball = timestamp(0);       //start one right away

        ai_deathroll_start(objp);

        // play death roll begin sound
        sp->death_roll_snd = snd_play_3d( &Snds[SND_DEATH_ROLL], &objp->pos, &View_position, objp->radius );
        if (objp == Player_obj)
                joy_ff_deathroll();

        // apply a whack
        //      rotational velocity proportional to original translational velocity, with a bit added in.
        //      Also, preserve half of original rotational velocity.

        // At standard speed (70) and standard mass (50), deathroll rotvel should be capped at DEATHROLL_ROTVEL_CAP
        // Minimum deathroll velocity is set    DEATHROLL_ROTVEL_MIN
        // At lower speed, lower death rotvel (scaled linearly)
        // At higher mass, lower death rotvel (scaled logarithmically)
        // variable scale calculates the deathroll rotational velocity magnitude
        float logval = (float) log10(objp->phys_info.mass / (0.05f*DEATHROLL_MASS_STANDARD));
        float velval = ((vm_vec_mag_quick(&objp->phys_info.vel) + 3.0f) / DEATHROLL_VELOCITY_STANDARD);
        float   p1 = (float) (DEATHROLL_ROTVEL_CAP - DEATHROLL_ROTVEL_MIN);

        rotvel_mag = (float) DEATHROLL_ROTVEL_MIN * 2.0f/(logval + 2.0f);
        rotvel_mag += (float) (p1 * velval/logval) * 0.75f;

        // set so maximum velocity from rotation is less than 200
        if (rotvel_mag*objp->radius > 150) {
                rotvel_mag = 150.0f / objp->radius;
        }

        if (object_is_dead_docked(objp)) {
                // don't change current rotvel
                sp->deathroll_rotvel = objp->phys_info.rotvel;
        } else {
                // if added rotvel is too random, we should decrease the random component, putting a const in front of the rotvel.
                sp->deathroll_rotvel = objp->phys_info.rotvel;
                sp->deathroll_rotvel.xyz.x += (frand() - 0.5f) * 2.0f * rotvel_mag;
                saturate_fabs(&sp->deathroll_rotvel.xyz.x, 0.75f*DEATHROLL_ROTVEL_CAP);
                sp->deathroll_rotvel.xyz.y += (frand() - 0.5f) * 3.0f * rotvel_mag;
                saturate_fabs(&sp->deathroll_rotvel.xyz.y, 0.75f*DEATHROLL_ROTVEL_CAP);
                sp->deathroll_rotvel.xyz.z += (frand() - 0.5f) * 6.0f * rotvel_mag;
                // make z component  2x larger than larger of x,y
                float largest_mag = MAX(fl_abs(sp->deathroll_rotvel.xyz.x), fl_abs(sp->deathroll_rotvel.xyz.y));
                if (fl_abs(sp->deathroll_rotvel.xyz.z) < 2.0f*largest_mag) {
                        sp->deathroll_rotvel.xyz.z *= (2.0f * largest_mag / fl_abs(sp->deathroll_rotvel.xyz.z));
                }
                saturate_fabs(&sp->deathroll_rotvel.xyz.z, 0.75f*DEATHROLL_ROTVEL_CAP);
                // nprintf(("Physics", "Frame: %i rotvel_mag: %5.2f, rotvel: (%4.2f, %4.2f, %4.2f)\n", Framecount, rotvel_mag, sp->deathroll_rotvel.x, sp->deathroll_rotvel.y, sp->deathroll_rotvel.z));
        }

        
        // blow out his reverse thrusters. Or drag, same thing.
        objp->phys_info.rotdamp = (float) DEATHROLL_ROTVEL_SCALE / rotvel_mag;
        objp->phys_info.side_slip_time_const = 10000.0f;

        vm_vec_zero(&objp->phys_info.max_vel);          // make so he can't turn on his own VOLITION anymore.

        vm_vec_zero(&objp->phys_info.max_rotvel);       // make so he can't change speed on his own VOLITION anymore.

}

// called from ship_hit_kill if the ship is vaporized
void ship_vaporize(ship *shipp)
{
        object *ship_objp;

        // sanity
        Assert(shipp != NULL);
        if(shipp == NULL){
                return;
        }
        Assert((shipp->objnum >= 0) && (shipp->objnum < MAX_OBJECTS));
        if((shipp->objnum < 0) || (shipp->objnum >= MAX_OBJECTS)){
                return;
        }
        ship_objp = &Objects[shipp->objnum];

        // create debris shards
        create_vaporize_debris(ship_objp, &ship_objp->pos);
}

//      *ship_objp was hit and we've determined he's been killed!  By *other_obj!
void ship_hit_kill(object *ship_objp, object *other_obj, float percent_killed, int self_destruct)
{
        Assert(ship_objp);      // Goober5000 - but not other_obj, not only for sexp but also for self-destruct

        Script_system.SetHookObject("Self", ship_objp);
        if(other_obj != NULL)
                Script_system.SetHookObject("Killer", other_obj);
        else
                Script_system.SetHookObject("Killer", 0);

        if(Script_system.IsConditionOverride(CHA_DEATH, ship_objp))
        {
                //WMC - Do scripting stuff
                Script_system.RunCondition(CHA_DEATH, 0, NULL, ship_objp);
                Script_system.RemHookVars(2, "Self", "Killer");
                return;
        }

        ship *sp;
        char *killer_ship_name;
        int killer_damage_percent = 0;
        int killer_index = -1;
        object *killer_objp = NULL;

        sp = &Ships[ship_objp->instance];
        show_dead_message(ship_objp, other_obj);

        if (ship_objp == Player_obj) {
                player_died_start(other_obj);
        }

        // maybe vaporize him
        if(sp->flags & SF_VAPORIZE){
                ship_vaporize(sp);
        }

        // hehe
        extern void game_tst_mark(object *objp, ship *shipp);
        game_tst_mark(ship_objp, sp);

        // single player and multiplayer masters evaluate the scoring and kill stuff
        if ( !MULTIPLAYER_CLIENT ) {
                killer_index = scoring_eval_kill( ship_objp );

                // ship is destroyed -- send this event to the mission log stuff to record this event.  Try to find who
                // killed this ship.  scoring_eval_kill above should leave the obj signature of the ship who killed
                // this guy (or a -1 if no one got the kill).
                killer_ship_name = NULL;
                killer_damage_percent = -1;
                if ( killer_index >= 0 ) {
                        object *objp;
                        int sig;

                        sig = sp->damage_ship_id[killer_index];
                        for ( objp = GET_FIRST(&obj_used_list); objp != END_OF_LIST(&obj_used_list); objp = GET_NEXT(objp) ) {
                                if ( objp->signature == sig ){
                                        break;
                                }
                        }
                        // if the object isn't around, the try to find the object in the list of ships which has exited                 
                        if ( objp != END_OF_LIST(&obj_used_list) ) {
                                Assert ( (objp->type == OBJ_SHIP ) || (objp->type == OBJ_GHOST) );                                      // I suppose that this should be true
                                killer_ship_name = Ships[objp->instance].ship_name;

                                killer_objp = objp;
                        } else {
                                int ei;

                                ei = ship_find_exited_ship_by_signature( sig );
                                if ( ei != -1 ){
                                        killer_ship_name = Ships_exited[ei].ship_name;
                                }
                        }
                        killer_damage_percent = (int)(sp->damage_ship[killer_index]/sp->total_damage_received * 100.0f);
                }               

                if(!self_destruct){
                        // multiplayer
                        if(Game_mode & GM_MULTIPLAYER){
                                char name1[256] = "";
                                char name2[256] = "";
                                int np_index;

                                // get first name                               
                                np_index = multi_find_player_by_object(ship_objp);
                                if((np_index >= 0) && (np_index < MAX_PLAYERS) && (Net_players[np_index].m_player != NULL)){
                                        strcpy_s(name1, Net_players[np_index].m_player->callsign);
                                } else {
                                        strcpy_s(name1, sp->ship_name);
                                }

                                // argh
                                if((killer_objp != NULL) || (killer_ship_name != NULL)){

                                        // second name
                                        if(killer_objp == NULL){
                                                strcpy_s(name2, killer_ship_name);
                                        } else {
                                                np_index = multi_find_player_by_object(killer_objp);
                                                if((np_index >= 0) && (np_index < MAX_PLAYERS) && (Net_players[np_index].m_player != NULL)){
                                                        strcpy_s(name2, Net_players[np_index].m_player->callsign);
                                                } else {
                                                        strcpy_s(name2, killer_ship_name);
                                                }
                                        }                                       
                                }

                                mission_log_add_entry(LOG_SHIP_DESTROYED, name1, name2, killer_damage_percent);
                        } else {
                                // DKA: 8/23/99 allow message log in single player with no killer name
                                //if(killer_ship_name != NULL){
                                mission_log_add_entry(LOG_SHIP_DESTROYED, sp->ship_name, killer_ship_name, killer_damage_percent);
                                //}
                        }
                }

                // maybe praise the player for this kill
                if ( (killer_damage_percent > 10) && (other_obj != NULL) ) {
                        if (other_obj->parent_sig == Player_obj->signature) {
                                ship_maybe_praise_player(sp);
                        }
                        else if ((other_obj->parent_type == OBJ_SHIP) || (other_obj->parent_type == OBJ_START))  {
                                ship_maybe_praise_self(sp, &Ships[Objects[other_obj->parent].instance]);
                        }
                }
        }

        ship_generic_kill_stuff( ship_objp, percent_killed );

        // mwa -- removed 2/25/98 -- why is this here?  ship_objp->flags &= ~(OF_PLAYER_SHIP);
        // if it is for observers, must deal with it a separate way!!!!
        if ( MULTIPLAYER_MASTER ) {
                // check to see if this ship needs to be respawned
                multi_respawn_check(ship_objp);
                        
                // send the kill packet to all players
                // maybe send vaporize packet to all players
                send_ship_kill_packet( ship_objp, other_obj, percent_killed, self_destruct );
        }

        // if a non-player is dying, play a scream
        if ( !(ship_objp->flags & OF_PLAYER_SHIP) ) {
                ship_maybe_scream(sp);
        }

        // if the player is dying, have wingman lament
        if ( ship_objp == Player_obj ) {
                ship_maybe_lament();
        }

        Script_system.RunCondition(CHA_DEATH, 0, NULL, ship_objp);
        Script_system.RemHookVars(2, "Self", "Killer");
}

// function to simply explode a ship where it is currently at
void ship_self_destruct( object *objp )
{       
        Assert ( objp->type == OBJ_SHIP );

        // try and find a player
        if((Game_mode & GM_MULTIPLAYER) && (multi_find_player_by_object(objp) >= 0)){
                int np_index = multi_find_player_by_object(objp);
                if((np_index >= 0) && (np_index < MAX_PLAYERS) && (Net_players[np_index].m_player != NULL)){
                        mission_log_add_entry(LOG_SELF_DESTRUCTED, Net_players[np_index].m_player->callsign, NULL );
                } else {
                        mission_log_add_entry(LOG_SELF_DESTRUCTED, Ships[objp->instance].ship_name, NULL );
                }
        } else {
                mission_log_add_entry(LOG_SELF_DESTRUCTED, Ships[objp->instance].ship_name, NULL );
        }
        
        // check to see if this ship needs to be respawned
        if(MULTIPLAYER_MASTER){
                // player ship?
                int np_index = multi_find_player_by_object(objp);
                if((np_index >= 0) && (np_index < MAX_PLAYERS) && MULTI_CONNECTED(Net_players[np_index]) && (Net_players[np_index].m_player != NULL)){
                        char msg[512] = "";
                        sprintf(msg, "%s %s", Net_players[np_index].m_player->callsign, XSTR("Self destructed", 1476));

                        // send a message
                        send_game_chat_packet(Net_player, msg, MULTI_MSG_ALL, NULL, NULL, 2);

                        // printf
                        if(!(Game_mode & GM_STANDALONE_SERVER)){
                                HUD_printf(msg);
                        }
                }
        }

        // self destruct
        ship_hit_kill(objp, NULL, 1.0f, 1);     
}

extern int Homing_hits, Homing_misses;

// Call this instead of physics_apply_whack directly to 
// deal with two docked ships properly.
// Goober5000 - note... hit_pos is in *local* coordinates
void ship_apply_whack(vec3d *force, vec3d *hit_pos, object *objp)
{
        if (objp == Player_obj) {
                nprintf(("Sandeep", "Playing stupid joystick effect\n"));
                vec3d test;
                vm_vec_unrotate(&test, force, &objp->orient);

                game_whack_apply( -test.xyz.x, -test.xyz.y );
        }

        if (object_is_docked(objp))
        {
                float overall_mass = dock_calc_total_docked_mass(objp);

                // Goober5000 - this code attempts to account properly for whacking a docked object as one mass.
                // It isn't perfect, because physics doesn't completely account for it (particularly because it
                // still uses the moment of inertia for the whacked object, not for all objects).  Commenting
                // out the contents of the block restores the Volition behavior, but it doesn't calculate the
                // correct torque.
                // Addendum: this block is now not executed for docked fighters or bombers because the whack
                // looks like the fighter is doing evasive maneuvers
                if ((objp->type != OBJ_SHIP) || !(Ship_info[Ships[objp->instance].ship_info_index].flags & (SIF_FIGHTER | SIF_BOMBER)))
                {
                        vec3d world_hit_pos, world_center_pos;

                        // calc world hit pos of the hit ship
                        vm_vec_unrotate(&world_hit_pos, hit_pos, &objp->orient);
                        vm_vec_add2(&world_hit_pos, &objp->pos);

                        // calc overall world center of ships
                        dock_calc_docked_center(&world_center_pos, objp);

                        // the new hitpos is the vector from world center to world hitpos
                        vm_vec_sub(hit_pos, &world_hit_pos, &world_center_pos);
                }

                // whack it
                physics_apply_whack(force, hit_pos, &objp->phys_info, &objp->orient, overall_mass);
        }
        else
        {
                physics_apply_whack(force, hit_pos, &objp->phys_info, &objp->orient, objp->phys_info.mass);
        }                                       
}

// If a ship is dying and it gets hit, shorten its deathroll.
//      But, if it's a player, don't decrease below MIN_PLAYER_DEATHROLL_TIME
void shiphit_hit_after_death(object *ship_objp, float damage)
{
        float   percent_killed;
        int     delta_time, time_remaining;
        ship    *shipp = &Ships[ship_objp->instance];
        ship_info *sip = &Ship_info[shipp->ship_info_index];

        // Since the explosion has two phases (final_death_time and really_final_death_time)
        // we should only shorten the deathroll time if that is the phase we're in.
        // And you can tell by seeing if the timestamp is valid, since it gets set to
        // invalid after it does the first large explosion.
        if ( !timestamp_valid(shipp->final_death_time) )        {
                return;
        }

        // Don't adjust vaporized ship
        if (shipp->flags & SF_VAPORIZE) {
                return;
        }

        //      Don't shorten deathroll on very large ships.
        if (ship_objp->radius > BIG_SHIP_MIN_RADIUS)
                return;

        percent_killed = damage/shipp->ship_max_hull_strength;
        if (percent_killed > 1.0f)
                percent_killed = 1.0f;

        delta_time = (int) (4 * sip->death_roll_base_time * percent_killed);
        time_remaining = timestamp_until(shipp->final_death_time);

        //nprintf(("AI", "Gametime = %7.3f, Time until %s dies = %7.3f, delta = %7.3f\n", f2fl(Missiontime), Ships[ship_objp->instance].ship_name, (float)time_remaining/1000.0f, delta_time));
        if (ship_objp->flags & OF_PLAYER_SHIP)
                if (time_remaining < MIN_PLAYER_DEATHROLL_TIME)
                        return;

        // nprintf(("AI", "Subtracting off %7.3f seconds from deathroll, reducing to %7.3f\n", (float) delta_time/1000.0f, (float) (time_remaining - delta_time)/1000.0f));

        delta_time = time_remaining - delta_time;
        if (ship_objp->flags & OF_PLAYER_SHIP)
                if (delta_time < MIN_PLAYER_DEATHROLL_TIME)
                        delta_time = MIN_PLAYER_DEATHROLL_TIME;

        //      Prevent bogus timestamp.
        if (delta_time < 2)
                delta_time = 2;

        shipp->final_death_time = timestamp(delta_time);        // Adjust time until explosion.
}

MONITOR( ShipHits )
MONITOR( ShipNumDied )

int maybe_shockwave_damage_adjust(object *ship_objp, object *other_obj, float *damage)
{
        ship_subsys *subsys;
        ship *shipp;
        float dist, nearest_dist = FLT_MAX;
        vec3d g_subobj_pos;
        float max_damage;
        float inner_radius, outer_radius;

        Assert(ship_objp);      // Goober5000 (but not other_obj in case of sexp)
        Assert(damage);         // Goober5000

        Assert(ship_objp->type == OBJ_SHIP);

        if (!other_obj) {
                return 0;
        }

        if (other_obj->type != OBJ_SHOCKWAVE) {
                return 0;
        }

        if (!(Ship_info[Ships[ship_objp->instance].ship_info_index].flags & SIF_HUGE_SHIP)) {
                return 0;
        }

        shipp = &Ships[ship_objp->instance];

        // find closest subsystem distance to shockwave origin
        for (subsys=GET_FIRST(&shipp->subsys_list); subsys != END_OF_LIST(&shipp->subsys_list); subsys = GET_NEXT(subsys) ) {
                get_subsystem_world_pos(ship_objp, subsys, &g_subobj_pos);
                dist = vm_vec_dist_quick(&g_subobj_pos, &other_obj->pos);

                if (dist < nearest_dist) {
                        nearest_dist = dist;
                }
        }

        // get max damage and adjust if needed to account for shockwave created from destroyed weapon
        max_damage = shockwave_get_damage(other_obj->instance);
        if (shockwave_get_flags(other_obj->instance) & SW_WEAPON_KILL) {
                max_damage *= 4.0f;
        }

        outer_radius = shockwave_get_max_radius(other_obj->instance);
        inner_radius = shockwave_get_min_radius(other_obj->instance);

        // scale damage
        // floor of 25%, max if within inner_radius, linear between
        if (nearest_dist > outer_radius) {
                *damage = max_damage / 4.0f;
        } else if (nearest_dist < inner_radius) {
                *damage = max_damage;
        } else {
                *damage = max_damage * (1.0f - 0.75f * (nearest_dist - inner_radius) / (outer_radius - inner_radius));
        }

        return 1;
}

// ------------------------------------------------------------------------
// ship_do_damage()
//
// Do damage assessment on a ship.    This should only be called
// internally by ship_apply_global_damage and ship_apply_local_damage
//
// 
//      input:  ship_objp               =>              object pointer for ship receiving damage
//                              other_obj       =>              object pointer to object causing damage
//                              hitpos          =>              impact world pos on the ship 
//                              TODO:   get a better value for hitpos
//                              damage          =>              damage to apply to the ship
//                              quadrant        => which part of shield takes damage, -1 if not shield hit
//                              submodel_num=> which submodel was hit, -1 if none in particular
//                              wash_damage     =>              1 if damage is done by engine wash
// Goober5000 - sanity checked this whole function in the case that other_obj is NULL, which
// will happen with the explosion-effect sexp
void ai_update_lethality(object *ship_objp, object *weapon_obj, float damage);
static void ship_do_damage(object *ship_objp, object *other_obj, vec3d *hitpos, float damage, int quadrant, int submodel_num, int wash_damage=0)
{
//      mprintf(("doing damage\n"));

        ship *shipp;    
        float subsystem_damage = damage;                        // damage to be applied to subsystems
        int other_obj_is_weapon;
        int other_obj_is_beam;
        int other_obj_is_shockwave;
        int other_obj_is_asteroid;
        int other_obj_is_debris;
        int other_obj_is_ship;
        float difficulty_scale_factor = 1.0f;

        Assert(ship_objp);      // Goober5000
        Assert(hitpos);         // Goober5000

        Assert(ship_objp->instance >= 0);
        Assert(ship_objp->type == OBJ_SHIP);
        shipp = &Ships[ship_objp->instance];

        // maybe adjust damage done by shockwave for BIG|HUGE
        maybe_shockwave_damage_adjust(ship_objp, other_obj, &damage);

        // Goober5000 - check to see what other_obj is
        if (other_obj)
        {
                other_obj_is_weapon = ((other_obj->type == OBJ_WEAPON) && (other_obj->instance >= 0) && (other_obj->instance < MAX_WEAPONS));
                other_obj_is_beam = ((other_obj->type == OBJ_BEAM) && (other_obj->instance >= 0) && (other_obj->instance < MAX_BEAMS));
                other_obj_is_shockwave = ((other_obj->type == OBJ_SHOCKWAVE) && (other_obj->instance >= 0) && (other_obj->instance < MAX_SHOCKWAVES));
                other_obj_is_asteroid = ((other_obj->type == OBJ_ASTEROID) && (other_obj->instance >= 0) && (other_obj->instance < MAX_ASTEROIDS));
                other_obj_is_debris = ((other_obj->type == OBJ_DEBRIS) && (other_obj->instance >= 0) && (other_obj->instance < MAX_DEBRIS_PIECES));
                other_obj_is_ship = ((other_obj->type == OBJ_SHIP) && (other_obj->instance >= 0) && (other_obj->instance < MAX_SHIPS));
        }
        else
        {
                other_obj_is_weapon = 0;
                other_obj_is_beam = 0;
                other_obj_is_shockwave = 0;
                other_obj_is_asteroid = 0;
                other_obj_is_debris = 0;
                other_obj_is_ship = 0;
        }

        // update lethality of ship doing damage - modified by Goober5000
        if (other_obj_is_weapon || other_obj_is_shockwave) {
                ai_update_lethality(ship_objp, other_obj, damage);
        }

        // if this is a weapon
        if (other_obj_is_weapon)
                damage *= weapon_get_damage_scale(&Weapon_info[Weapons[other_obj->instance].weapon_info_index], other_obj, ship_objp);

        MONITOR_INC( ShipHits, 1 );

        //      Don't damage player ship in the process of warping out.
        if ( Player->control_mode >= PCM_WARPOUT_STAGE2 )       {
                if ( ship_objp == Player_obj ){
                        return;
                }
        }

        if ( other_obj_is_weapon ) {            
                // for tvt and dogfight missions, don't scale damage
                if( (Game_mode & GM_MULTIPLAYER) && ((Netgame.type_flags & NG_TYPE_TEAM) || (Netgame.type_flags & NG_TYPE_DOGFIGHT)) ){
                } 
                else {
                        // Do a little "skill" balancing for the player in single player and coop multiplayer
                        if (ship_objp->flags & OF_PLAYER_SHIP)  {
                                // Nuke - store it in a couple factor and we will apply it where needed
                                difficulty_scale_factor *= The_mission.ai_profile->player_damage_scale[Game_skill_level];
                        }               
                }
        }

        // if this is not a laser, or i'm not a multiplayer client
        // apply pain to me

        // Goober5000: make sure other_obj doesn't cause a read violation!
        if (other_obj && !(Ship_info[Ships[Player_obj->instance].ship_info_index].flags2 & SIF2_NO_PAIN_FLASH))
        {
                // For the record, ship_hit_pain seems to simply be the red flash that appears
                // on the screen when you're hit.
                int special_check = !MULTIPLAYER_CLIENT;

                // now the actual checks
                if (other_obj->type == OBJ_BEAM)
                {
                        Assert((beam_get_weapon_info_index(other_obj) >= 0) && (beam_get_weapon_info_index(other_obj) < Num_weapon_types));
                        if (((Weapon_info[beam_get_weapon_info_index(other_obj)].subtype != WP_LASER) || special_check) && (Player_obj != NULL) && (ship_objp == Player_obj))
                        {
                                ship_hit_pain(damage * difficulty_scale_factor, quadrant);
                        }       
                }
                if (other_obj_is_weapon)
                {
                        Assert((Weapons[other_obj->instance].weapon_info_index > -1) && (Weapons[other_obj->instance].weapon_info_index < Num_weapon_types));
                        if (((Weapon_info[Weapons[other_obj->instance].weapon_info_index].subtype != WP_LASER) || special_check) && (Player_obj != NULL) && (ship_objp == Player_obj))
                        {
                                ship_hit_pain(damage * difficulty_scale_factor, quadrant);
                        }
                }
        }       // read violation sanity check


        // If the ship is invulnerable, do nothing
        if (ship_objp->flags & OF_INVULNERABLE) {
                return;
        }

        //      if ship is already dying, shorten deathroll.
        if (shipp->flags & SF_DYING) {
                shiphit_hit_after_death(ship_objp, (damage * difficulty_scale_factor));
                return;
        }
        
        //      If we hit the shield, reduce it's strength and found
        // out how much damage is left over.
        if ( quadrant >= 0 && !(ship_objp->flags & OF_NO_SHIELDS) )     {
//              mprintf(("applying damage ge to shield\n"));
                float shield_factor = -1.0f;
                int     weapon_info_index;

                weapon_info_index = shiphit_get_damage_weapon(other_obj);
                if ( weapon_info_index >= 0 ) {
                        shield_factor = Weapon_info[weapon_info_index].shield_factor;
                }

                if ( shield_factor >= 0.0f ) {
                        damage *= shield_factor;
                        subsystem_damage *= shield_factor;
                }

                if ( damage > 0.0f ) {

                        float piercing_pct = 0.0f;
                        int dmg_type_idx = -1;

                        //Do armor stuff
                        if(other_obj_is_weapon) {
                                dmg_type_idx = Weapon_info[Weapons[other_obj->instance].weapon_info_index].damage_type_idx;
                        } else if(other_obj_is_beam) {
                                dmg_type_idx = Weapon_info[beam_get_weapon_info_index(other_obj)].damage_type_idx;
                        } else if(other_obj_is_shockwave) {
                                dmg_type_idx = shockwave_get_damage_type_idx(other_obj->instance);
                        } else if(other_obj_is_asteroid) {
                                dmg_type_idx = Asteroid_info[Asteroids[other_obj->instance].asteroid_type].damage_type_idx;
                        } else if(other_obj_is_debris) {
                                dmg_type_idx = Debris[other_obj->instance].damage_type_idx;
                        } else if(other_obj_is_ship) {
                                dmg_type_idx = Ships[other_obj->instance].collision_damage_type_idx;
                        }
                                
                        if(shipp->shield_armor_type_idx != -1)
                        {
                                piercing_pct = Armor_types[shipp->shield_armor_type_idx].GetShieldPiercePCT(dmg_type_idx);
                        }
                        
                        float pre_shield = damage; // Nuke: don't use the difficulty scaling in here, since its also applied in Armor_type.GetDamage. Don't want it to apply twice
                        float pre_shield_ss = subsystem_damage; // Nuke - same here

                        if (piercing_pct > 0.0f) {
                                damage = pre_shield * (1.0f - piercing_pct);
                        }

                        // Nuke: apply pre_shield difficulty scaling here, since it was meant to be applied through damage
                        pre_shield *= difficulty_scale_factor;

                        if(shipp->shield_armor_type_idx != -1)
                        {
                                // Nuke: this call will decide when to use the damage factor, but it will get used, unless the modder is dumb (like setting +Difficulty Scale Type: to 'manual' and not manually applying it in their calculations)
                                damage = Armor_types[shipp->shield_armor_type_idx].GetDamage(damage, dmg_type_idx, difficulty_scale_factor);
                        } else { // Nuke: if that didn't get called, difficulty would not be applied to damage so apply it here
                                damage *= difficulty_scale_factor;
                        }

                        damage = apply_damage_to_shield(ship_objp, quadrant, damage);

                        if (damage > 0.0f) {
                                subsystem_damage *= (damage / pre_shield);
                        } else {
                                subsystem_damage = 0.0f;
                        }

                        if (piercing_pct > 0.0f) {
                                damage += (piercing_pct * pre_shield);
                                subsystem_damage += (piercing_pct * pre_shield_ss);
                        }
                }

                // if shield damage was increased, don't carry over leftover damage at scaled level
                if ( shield_factor > 1.0f ) {
                        damage /= shield_factor;

                        subsystem_damage /= shield_factor;
                }
        }
                        
        // Apply leftover damage to the ship's subsystem and hull.
        if ( (damage > 0.0f) || (subsystem_damage > 0.0f) )     {
                int     weapon_info_index;
                float pre_subsys = subsystem_damage; // Nuke: should be the last time we need to do this in this function
                bool apply_hull_armor = true;
                bool apply_diff_scale = true;

                subsystem_damage = do_subobj_hit_stuff(ship_objp, other_obj, hitpos, submodel_num, subsystem_damage, &apply_hull_armor);

                if (subsystem_damage > 0.0f) {
                        damage *= (subsystem_damage / pre_subsys);
                } else {
                        damage = 0.0f;
                }

                //Do armor stuff
                if (apply_hull_armor)
                {
                        int dmg_type_idx = -1;
                        if(other_obj_is_weapon) {
                                dmg_type_idx = Weapon_info[Weapons[other_obj->instance].weapon_info_index].damage_type_idx;
                        } else if(other_obj_is_beam) {
                                dmg_type_idx = Weapon_info[beam_get_weapon_info_index(other_obj)].damage_type_idx;
                        } else if(other_obj_is_shockwave) {
                                dmg_type_idx = shockwave_get_damage_type_idx(other_obj->instance);
                        } else if(other_obj_is_asteroid) {
                                dmg_type_idx = Asteroid_info[Asteroids[other_obj->instance].asteroid_type].damage_type_idx;
                        } else if(other_obj_is_debris) {
                                dmg_type_idx = Debris[other_obj->instance].damage_type_idx;
                        } else if(other_obj_is_ship) {
                                dmg_type_idx = Ships[other_obj->instance].collision_damage_type_idx;
                        }
                        
                        if(shipp->armor_type_idx != -1)
                        {
                                damage = Armor_types[shipp->armor_type_idx].GetDamage(damage, dmg_type_idx, difficulty_scale_factor);
                                apply_diff_scale = false;
                        }
                }
                // Nuke: this is done incase difficulty scaling is not applied into damage by getDamage() above
                if (apply_diff_scale) {
                        damage *= difficulty_scale_factor; // Nuke: we can finally stop doing this now
                }

                // continue with damage?
                if (damage > 0.0f) {
                        weapon_info_index = shiphit_get_damage_weapon(other_obj);       // Goober5000 - a NULL other_obj returns -1
                        if ( weapon_info_index >= 0 ) {
                                if (Weapon_info[weapon_info_index].wi_flags & WIF_PUNCTURE) {
                                        damage /= 4;
                                }

                                damage *= Weapon_info[weapon_info_index].armor_factor;
                        }

                        // if ship is flagged as can not die, don't let it die
                        if (shipp->ship_guardian_threshold > 0) {
                                float min_hull_strength = 0.01f * shipp->ship_guardian_threshold * shipp->ship_max_hull_strength;
                                if ( (ship_objp->hull_strength - damage) < min_hull_strength ) {
                                        // find damage needed to take object to min hull strength
                                        damage = ship_objp->hull_strength - min_hull_strength;

                                        // make sure damage is positive
                                        damage = MAX(0, damage);
                                }
                        }

                        // multiplayer clients don't do damage
                        if (((Game_mode & GM_MULTIPLAYER) && MULTIPLAYER_CLIENT)) {
                        } else {
                                // Check if this is simulated damage.
                                weapon_info_index = shiphit_get_damage_weapon(other_obj);
                                if ( weapon_info_index >= 0 ) {
                                        if (Weapon_info[weapon_info_index].wi_flags2 & WIF2_TRAINING) {
//                                              diag_printf2("Simulated Hull for Ship %s hit, dropping from %.32f to %d.\n", shipp->ship_name, (int) ( ship_objp->sim_hull_strength * 100 ), (int) ( ( ship_objp->sim_hull_strength - damage ) * 100 ) );
                                                ship_objp->sim_hull_strength -= damage;
                                                ship_objp->sim_hull_strength = MAX( 0, ship_objp->sim_hull_strength );
                                                return;
                                        }
                                }
                                ship_objp->hull_strength -= damage;
                        }

                        // let damage gauge know that player ship just took damage
                        if ( Player_obj == ship_objp ) {
                                hud_gauge_popup_start(HUD_DAMAGE_GAUGE, 5000);
                        }
                
                        // DB - removed 1/12/99 - scoring code properly bails if MULTIPLAYER_CLIENT
                        // in multiplayer, if I am not the host, get out of this function here!!
                        //if ( MULTIPLAYER_CLIENT ) {
                                //return;
                        //}             

                        if (other_obj)
                        {
                                switch (other_obj->type)
                                {
                                        case OBJ_SHOCKWAVE:
                                                scoring_add_damage(ship_objp,other_obj,damage);
                                                break;
                                        case OBJ_ASTEROID:
                                                // don't call scoring for asteroids
                                                break;
                                        case OBJ_WEAPON:
                                                if((other_obj->parent < 0) || (other_obj->parent >= MAX_OBJECTS)){
                                                        scoring_add_damage(ship_objp, NULL, damage);
                                                } else {
                                                        scoring_add_damage(ship_objp, &Objects[other_obj->parent], damage);
                                                }
                                                break;
                                        case OBJ_BEAM://give kills for fighter beams-Bobboau
                                        {
                                                int bobjn = beam_get_parent(other_obj);

                                                // Goober5000 - only count beams fired by fighters or bombers unless the ai profile says different
                                                if (bobjn >= 0)
                                                {
                                                        if ( !(The_mission.ai_profile->flags & AIPF_INCLUDE_BEAMS_IN_STAT_CALCS) && 
                                                                 !(Ship_info[Ships[Objects[bobjn].instance].ship_info_index].flags & (SIF_FIGHTER | SIF_BOMBER)) && 
                                                                 !(Objects[bobjn].flags & OF_PLAYER_SHIP) ) {
                                                                bobjn = -1;
                                                        }
                                                }

                                                if(bobjn == -1){
                                                        scoring_add_damage(ship_objp, NULL, damage);
                                                } else {
                                                        scoring_add_damage(ship_objp, &Objects[bobjn], damage);
                                                }
                                                break;
                                          }
                                        default:
                                                break;
                                }
                        }       // other_obj

                        if (ship_objp->hull_strength <= 0.0f) {
                                MONITOR_INC( ShipNumDied, 1 );

                                ship_info       *sip = &Ship_info[shipp->ship_info_index];

                                // If massive beam hitting small ship, vaporize  otherwise normal damage pipeline
                                // Only vaporize once
                                // multiplayer clients should skip this
                                if(!MULTIPLAYER_CLIENT) {
                                        if ( !(shipp->flags & SF_VAPORIZE) ) {
                                                // Only small ships can be vaporized
                                                if (sip->flags & (SIF_SMALL_SHIP)) {
                                                        if (other_obj) {        // Goober5000 check for NULL
                                                                if (other_obj->type == OBJ_BEAM)
                                                                {
                                                                        int beam_weapon_info_index = beam_get_weapon_info_index(other_obj);
                                                                        if ( (beam_weapon_info_index > -1) && (Weapon_info[beam_weapon_info_index].wi_flags & (WIF_HUGE)) ) {
                                                                                // Flag as vaporized
                                                                                shipp->flags |= SF_VAPORIZE;
                                                                        }
                                                                }
                                                        }
                                                }
                                        }
                                }
                                
                                // maybe engine wash death
                                if (wash_damage) {
                                        shipp->wash_killed = 1;
                                }

                                float percent_killed = -get_hull_pct(ship_objp);
                                if (percent_killed > 1.0f){
                                        percent_killed = 1.0f;
                                }

                                if ( !(shipp->flags & SF_DYING) && !MULTIPLAYER_CLIENT) {  // if not killed, then kill
                                        ship_hit_kill(ship_objp, other_obj, percent_killed, 0);
                                }
                        }
                }
        }

        // if the hitting object is a weapon, maybe do some fun stuff here
        if(other_obj_is_weapon)
        {
                weapon_info *wip;
                Assert(other_obj->instance >= 0);
                if (other_obj->instance < 0) {
                        return;
                }
                Assert(Weapons[other_obj->instance].weapon_info_index >= 0);
                if (Weapons[other_obj->instance].weapon_info_index < 0) {
                        return;
                }
                wip = &Weapon_info[Weapons[other_obj->instance].weapon_info_index];

                // if its a leech weapon - NOTE - unknownplayer: Perhaps we should do something interesting like direct the leeched energy into the attacker ?
                if (wip->wi_flags & WIF_ENERGY_SUCK) {
                        // reduce afterburner fuel
                        shipp->afterburner_fuel -= wip->afterburner_reduce;
                        shipp->afterburner_fuel = (shipp->afterburner_fuel < 0.0f) ? 0.0f : shipp->afterburner_fuel;

                        // reduce weapon energy
                        shipp->weapon_energy -= wip->weapon_reduce;
                        shipp->weapon_energy = (shipp->weapon_energy < 0.0f) ? 0.0f : shipp->weapon_energy;
                }
        }
}

// Goober5000
void ship_apply_tag(int ship_num, int tag_level, float tag_time, object *target, vec3d *start, int ssm_index, int ssm_team)
{
        // set time first tagged
        if (Ships[ship_num].time_first_tagged == 0)
                Ships[ship_num].time_first_tagged = Missiontime;

        // do tag effect
        if (tag_level == 1)
        {
//              mprintf(("TAGGED %s for %f seconds\n", Ships[ship_num].ship_name, tag_time));
                Ships[ship_num].tag_left = tag_time;
                Ships[ship_num].tag_total = tag_time;
        }
        else if (tag_level == 2)
        {
//              mprintf(("Level 2 TAGGED %s for %f seconds\n", Ships[ship_num].ship_name, tag_time));
                Ships[ship_num].level2_tag_left = tag_time;
                Ships[ship_num].level2_tag_total = tag_time;
        }
        else if (tag_level == 3)
        {
                // tag C creates an SSM strike, yay -Bobboau
                Assert(target);
                Assert(start);
                if (ssm_index < 0)      // TAG-C? Is that you? -MageKing17
                        return;

                ssm_create(target, start, ssm_index, NULL, ssm_team);
        }
}

// This gets called to apply damage when something hits a particular point on a ship.
// This assumes that whoever called this knows if the shield got hit or not.
// hitpos is in world coordinates.
// if quadrant is not -1, then that part of the shield takes damage properly.
void ship_apply_local_damage(object *ship_objp, object *other_obj, vec3d *hitpos, float damage, int quadrant, bool create_spark, int submodel_num, vec3d *hit_normal)
{
        Assert(ship_objp);      // Goober5000
        Assert(other_obj);      // Goober5000

        ship *ship_p = &Ships[ship_objp->instance];
    weapon *wp = &Weapons[other_obj->instance];
        bool create_sparks = true;

        //      If got hit by a weapon, tell the AI so it can react.  Only do this line in single player,
        // or if I am the master in a multiplayer game
        if ((other_obj->type == OBJ_WEAPON) && ( !(Game_mode & GM_MULTIPLAYER) || MULTIPLAYER_MASTER )) {
                //      If weapon hits ship on same team and that ship not targeted and parent of weapon not player,
                //      don't do damage.
                //      Ie, player can always do damage.  AI can only damage team if that ship is targeted.
                if (wp->target_num != OBJ_INDEX(ship_objp)) {
                        if ((ship_p->team == wp->team) && !(Objects[other_obj->parent].flags & OF_PLAYER_SHIP) ) {
                                return;
                        }
                }
        }

        // only want to check the following in single player or if I am the multiplayer game server
        // Added OBJ_BEAM for traitor detection - FUBAR
        if ( !MULTIPLAYER_CLIENT && ((other_obj->type == OBJ_SHIP) || (other_obj->type == OBJ_WEAPON) || (other_obj->type == OBJ_BEAM)) ) {
                ai_ship_hit(ship_objp, other_obj, hitpos, quadrant, hit_normal);
        }

        //      Cut damage done on the player by 4x in training missions, but do full accredidation
        if ( The_mission.game_type & MISSION_TYPE_TRAINING ){
                if (ship_objp == Player_obj){
                        damage /= 4.0f;
                }
        }

        // maybe tag the ship
        if(!MULTIPLAYER_CLIENT && (other_obj->type == OBJ_WEAPON || other_obj->type == OBJ_BEAM)) {
                weapon_info *wip = NULL;

                if (other_obj->type == OBJ_WEAPON)
                        wip = &Weapon_info[Weapons[other_obj->instance].weapon_info_index];
                else if (other_obj->type == OBJ_BEAM)
                        wip = &Weapon_info[Beams[other_obj->instance].weapon_info_index];

                Assert(wip != NULL);

                if (wip->wi_flags & WIF_TAG) {
                        // ssm stuff
                        vec3d *start = hitpos;
                        int ssm_index = wip->SSM_index;

                        ship_apply_tag(ship_objp->instance, wip->tag_level, wip->tag_time, ship_objp, start, ssm_index, wp->team);
                }
        }

#ifndef NDEBUG
        if (other_obj->type == OBJ_WEAPON) {
                weapon_info     *wip = &Weapon_info[Weapons[other_obj->instance].weapon_info_index];
                if (wip->wi_flags & WIF_HOMING) {
                        Homing_hits++;
                        // nprintf(("AI", " Hit!  Hits = %i/%i\n", Homing_hits, (Homing_hits + Homing_misses)));
                }
        }
#endif

        if ( Event_Music_battle_started == 0 )  {
                ship_hit_music(ship_objp, other_obj);
        }
        

        if (damage < 0.0f){
                damage = 0.0f;
        }

        // evaluate any possible player stats implications
        scoring_eval_hit(ship_objp,other_obj);

        global_damage = false;
        ship_do_damage(ship_objp, other_obj, hitpos, damage, quadrant, submodel_num );

        // DA 5/5/98: move ship_hit_create_sparks() after do_damage() since number of sparks depends on hull strength
        // doesn't hit shield and we want sparks
        if ((quadrant == MISS_SHIELDS) && create_spark) {
                // check if subsys destroyed
                if ( !is_subsys_destroyed(ship_p, submodel_num) ) {
                        // Simulated weapons don't cause sparks
                        if(other_obj->type == OBJ_WEAPON || other_obj->type == OBJ_BEAM) {
                                weapon_info *wip = NULL;

                                if (other_obj->type == OBJ_WEAPON)
                                        wip = &Weapon_info[Weapons[other_obj->instance].weapon_info_index];
                                else if (other_obj->type == OBJ_BEAM)
                                        wip = &Weapon_info[Beams[other_obj->instance].weapon_info_index];

                                Assert(wip != NULL);

                                if (wip->wi_flags2 & WIF2_TRAINING) {
                                        create_sparks = false;
                                }
                        }

                        if (create_sparks) {
                                ship_hit_create_sparks(ship_objp, hitpos, submodel_num);
                        }
                }
                //fireball_create( hitpos, FIREBALL_SHIP_EXPLODE1, OBJ_INDEX(ship_objp), 0.25f );
        }
}

extern int Cmdline_nohtl;

// This gets called to apply damage when a damaging force hits a ship, but at no 
// point in particular.  Like from a shockwave.   This routine will see if the
// shield got hit and if so, apply damage to it.
// You can pass force_center==NULL if you the damage doesn't come from anywhere,
// like for debug keys to damage an object or something.  It will 
// assume damage is non-directional and will apply it correctly.   
void ship_apply_global_damage(object *ship_objp, object *other_obj, vec3d *force_center, float damage )
{
        Assert(ship_objp);      // Goober5000 (but not other_obj in case of sexp)

        vec3d tmp, world_hitpos;
        global_damage = true;

        if ( force_center )     {
                int shield_quad;
                vec3d local_hitpos;

                // find world hitpos
                vm_vec_sub( &tmp, force_center, &ship_objp->pos );
                vm_vec_normalize_safe( &tmp );
                vm_vec_scale_add( &world_hitpos, &ship_objp->pos, &tmp, ship_objp->radius );

                // Rotate world_hitpos into local coordinates (local_hitpos)
                vm_vec_sub(&tmp, &world_hitpos, &ship_objp->pos );
                vm_vec_rotate( &local_hitpos, &tmp, &ship_objp->orient );

                // shield_quad = quadrant facing the force_center
                shield_quad = get_quadrant(&local_hitpos, ship_objp);

                // world_hitpos use force_center for shockwave
                // Goober5000 check for NULL
                if (Cmdline_nohtl && (other_obj != NULL) && (other_obj->type == OBJ_SHOCKWAVE) && (Ship_info[Ships[ship_objp->instance].ship_info_index].flags & SIF_HUGE_SHIP))
                {
                        world_hitpos = *force_center;
                }

                // Do damage on local point             
                ship_do_damage(ship_objp, other_obj, &world_hitpos, damage, shield_quad, -1 );
        } else {
                // Since an force_center wasn't specified, this is probably just a debug key
                // to kill an object.   So pick a shield quadrant and a point on the
                // radius of the object.   
                vm_vec_scale_add( &world_hitpos, &ship_objp->pos, &ship_objp->orient.vec.fvec, ship_objp->radius );

                for (int i=0; i<ship_objp->n_quadrants; i++){
                        ship_do_damage(ship_objp, other_obj, &world_hitpos, damage/ship_objp->n_quadrants, i, -1);
                }
        }

        // AL 3-30-98: Show flashing blast icon if player ship has taken blast damage
        if ( ship_objp == Player_obj ) {
                // only show blast icon if playing on medium skill or lower -> unknownplayer: why? I think this should be changed.
                // Goober5000 - agreed; commented out
                //if ( Game_skill_level <= 2 ) {
                        hud_start_text_flash(XSTR("Blast", 1428), 2000);
                //}
        }

        // evaluate any player stats scoring conditions (specifically, blasts from remotely detonated secondary weapons)
        scoring_eval_hit(ship_objp,other_obj,1);
}

void ship_apply_wash_damage(object *ship_objp, object *other_obj, float damage)
{
        vec3d world_hitpos, direction_vec, rand_vec;

        // Since an force_center wasn't specified, this is probably just a debug key
        // to kill an object.   So pick a shield quadrant and a point on the
        // radius of the object
        vm_vec_rand_vec_quick(&rand_vec);
        vm_vec_scale_add(&direction_vec, &ship_objp->orient.vec.fvec, &rand_vec, 0.5f);
        vm_vec_normalize_quick(&direction_vec);
        vm_vec_scale_add( &world_hitpos, &ship_objp->pos, &direction_vec, ship_objp->radius );

        // Do damage to hull and not to shields
        global_damage = true;
        ship_do_damage(ship_objp, other_obj, &world_hitpos, damage, -1, -1, 1);

        // AL 3-30-98: Show flashing blast icon if player ship has taken blast damage
        if ( ship_objp == Player_obj ) {
                // only show blast icon if playing on medium skill or lower
                // Goober5000 - commented out
                //if ( Game_skill_level <= 2 ) {
                        hud_start_text_flash(XSTR("Engine Wash", 1429), 2000);
                //}
        }

        // evaluate any player stats scoring conditions (specifically, blasts from remotely detonated secondary weapons)
        scoring_eval_hit(ship_objp,other_obj,1);
}

// player pain
void ship_hit_pain(float damage, int quadrant)
{

        ship *shipp = &Ships[Player_obj->instance];
        ship_info *sip = &Ship_info[shipp->ship_info_index];

    if (!(Player_obj->flags & OF_INVULNERABLE))
    {
                if (Shield_pain_flash_factor != 0.0f && quadrant >= 0)
                         {
                        float effect = (Shield_pain_flash_factor * Player_obj->shield_quadrant[quadrant] * 4) / shipp->ship_max_shield_strength;
                        
                                if (Shield_pain_flash_factor < 0.0f)
                                 effect -= Shield_pain_flash_factor;
                        
                                game_flash((sip->shield_color[0] * effect) / 255.0f, (sip->shield_color[1] * effect) / 255.0f, (sip->shield_color[2] * effect) / 255.0f);
                        }
                else
                         game_flash(damage * Generic_pain_flash_factor / 15.0f, -damage * Generic_pain_flash_factor / 30.0f, -damage * Generic_pain_flash_factor / 30.0f);
    }

        // kill any active popups when you get hit.
        if ( Game_mode & GM_MULTIPLAYER ){
                popup_kill_any_active();
        }
}