/**
* Checks asteroid-ship collisions.
* @param pair obj_pair pointer to the two objects. pair->a is asteroid and pair->b is ship.
* @return 1 if all future collisions between these can be ignored
*/
int collide_asteroid_ship( obj_pair * pair )
{
if (!Asteroids_enabled)
return 0;
float dist;
object *pasteroid = pair->a;
object *pship = pair->b;
// Don't check collisions for warping out player
if ( Player->control_mode != PCM_NORMAL ) {
if ( pship == Player_obj ) return 0;
}
if (pasteroid->hull_strength < 0.0f)
return 0;
Assert( pasteroid->type == OBJ_ASTEROID );
Assert( pship->type == OBJ_SHIP );
dist = vm_vec_dist( &pasteroid->pos, &pship->pos );
if ( dist < pasteroid->radius + pship->radius ) {
int hit;
vec3d hitpos;
// create and initialize ship_ship_hit_info struct
collision_info_struct asteroid_hit_info;
init_collision_info_struct(&asteroid_hit_info);
if ( pasteroid->phys_info.mass > pship->phys_info.mass ) {
asteroid_hit_info.heavy = pasteroid;
asteroid_hit_info.light = pship;
} else {
asteroid_hit_info.heavy = pship;
asteroid_hit_info.light = pasteroid;
}
hit = asteroid_check_collision(pasteroid, pship, &hitpos, &asteroid_hit_info );
if ( hit )
{
//Scripting support (WMC)
Script_system.SetHookObjects(4, "Ship", pship, "Asteroid", pasteroid, "Self",pship, "Object", pasteroid);
bool ship_override = Script_system.IsConditionOverride(CHA_COLLIDEASTEROID, pship);
Script_system.SetHookObjects(2, "Self",pasteroid, "Object", pship);
bool asteroid_override = Script_system.IsConditionOverride(CHA_COLLIDESHIP, pasteroid);
if(!ship_override && !asteroid_override)
{
float ship_damage;
float asteroid_damage;
vec3d asteroid_vel = pasteroid->phys_info.vel;
// do collision physics
calculate_ship_ship_collision_physics( &asteroid_hit_info );
if ( asteroid_hit_info.impulse < 0.5f )
return 0;
// limit damage from impulse by making max impulse (for damage) 2*m*v_max_relative
float max_ship_impulse = (2.0f*pship->phys_info.max_vel.xyz.z+vm_vec_mag_quick(&asteroid_vel)) *
(pship->phys_info.mass*pasteroid->phys_info.mass) / (pship->phys_info.mass + pasteroid->phys_info.mass);
if (asteroid_hit_info.impulse > max_ship_impulse) {
ship_damage = 0.001f * max_ship_impulse;
} else {
ship_damage = 0.001f * asteroid_hit_info.impulse; // Cut collision-based damage in half.
}
// Decrease heavy damage by 2x.
if (ship_damage > 5.0f)
ship_damage = 5.0f + (ship_damage - 5.0f)/2.0f;
if ((ship_damage > 500.0f) && (ship_damage > Ships[pship->instance].ship_max_hull_strength/8.0f)) {
ship_damage = Ships[pship->instance].ship_max_hull_strength/8.0f;
nprintf(("AI", "Pinning damage to %s from asteroid at %7.3f (%7.3f percent)\n", Ships[pship->instance].ship_name, ship_damage, 100.0f * ship_damage/Ships[pship->instance].ship_max_hull_strength));
}
// Decrease damage during warp out because it's annoying when your escoree dies during warp out.
if (Ai_info[Ships[pship->instance].ai_index].mode == AIM_WARP_OUT)
ship_damage /= 3.0f;
// calculate asteroid damage and set asteroid damage to greater or asteroid and ship
// asteroid damage is needed since we can really whack some small asteroid with afterburner and not do
// significant damage to ship but the asteroid goes off faster than afterburner speed.
asteroid_damage = asteroid_hit_info.impulse/pasteroid->phys_info.mass; // ie, delta velocity of asteroid
asteroid_damage = (asteroid_damage > ship_damage) ? asteroid_damage : ship_damage;
// apply damage to asteroid
asteroid_hit( pasteroid, pship, &hitpos, asteroid_damage); // speed => damage
//extern fix Missiontime;
int quadrant_num;
if ( asteroid_hit_info.heavy == pship ) {
quadrant_num = get_ship_quadrant_from_global(&hitpos, pship);
if ((pship->flags[Object::Object_Flags::No_shields]) || !ship_is_shield_up(pship, quadrant_num) ) {
quadrant_num = -1;
}
ship_apply_local_damage(asteroid_hit_info.heavy, asteroid_hit_info.light, &hitpos, ship_damage, quadrant_num, CREATE_SPARKS, asteroid_hit_info.submodel_num);
} else {
// don't draw sparks (using sphere hitpos)
ship_apply_local_damage(asteroid_hit_info.light, asteroid_hit_info.heavy, &hitpos, ship_damage, MISS_SHIELDS, NO_SPARKS);
}
// maybe print Collision on HUD
if ( pship == Player_obj ) {
hud_start_text_flash(XSTR("Collision", 1431), 2000);
}
collide_ship_ship_do_sound(&hitpos, pship, pasteroid, pship==Player_obj);
}
Script_system.SetHookObjects(2, "Self",pship, "Object", pasteroid);
if(!(asteroid_override && !ship_override))
Script_system.RunCondition(CHA_COLLIDEASTEROID, '\0', NULL, pship);
Script_system.SetHookObjects(2, "Self",pasteroid, "Object", pship);
if((asteroid_override && !ship_override) || (!asteroid_override && !ship_override))
Script_system.RunCondition(CHA_COLLIDESHIP, '\0', NULL, pasteroid);
Script_system.RemHookVars(4, "Ship", "Asteroid", "Self", "Object");
return 0;
}
return 0;
} else {
// estimate earliest time at which pair can hit
float asteroid_max_speed, ship_max_speed, time;
ship *shipp = &Ships[pship->instance];
asteroid_max_speed = vm_vec_mag(&pasteroid->phys_info.vel); // Asteroid... vel gets reset, not max vel.z
asteroid_max_speed = MAX(asteroid_max_speed, 10.0f);
if (ship_is_beginning_warpout_speedup(pship)) {
ship_max_speed = MAX(ship_get_max_speed(shipp), ship_get_warpout_speed(pship));
} else {
ship_max_speed = ship_get_max_speed(shipp);
}
ship_max_speed = MAX(ship_max_speed, 10.0f);
ship_max_speed = MAX(ship_max_speed, pship->phys_info.vel.xyz.z);
time = 1000.0f * (dist - pship->radius - pasteroid->radius - 10.0f) / (asteroid_max_speed + ship_max_speed); // 10.0f is a safety factor
time -= 200.0f; // allow one frame slow frame at ~5 fps
if (time > 100) {
pair->next_check_time = timestamp( fl2i(time) );
} else {
pair->next_check_time = timestamp(0); // check next time
}
return 0;
}
}
/**
* Checks debris-ship collisions.
* @param pair obj_pair pointer to the two objects. pair->a is debris and pair->b is ship.
* @return 1 if all future collisions between these can be ignored
*/
int collide_debris_ship( obj_pair * pair )
{
float dist;
object *pdebris = pair->a;
object *pship = pair->b;
// Don't check collisions for warping out player
if ( Player->control_mode != PCM_NORMAL ) {
if ( pship == Player_obj )
return 0;
}
Assert( pdebris->type == OBJ_DEBRIS );
Assert( pship->type == OBJ_SHIP );
// don't check collision if it's our own debris and we are dying
if ( (pdebris->parent == OBJ_INDEX(pship)) && (Ships[pship->instance].flags[Ship::Ship_Flags::Dying]) )
return 0;
dist = vm_vec_dist( &pdebris->pos, &pship->pos );
if ( dist < pdebris->radius + pship->radius ) {
int hit;
vec3d hitpos;
// create and initialize ship_ship_hit_info struct
collision_info_struct debris_hit_info;
init_collision_info_struct(&debris_hit_info);
if ( pdebris->phys_info.mass > pship->phys_info.mass ) {
debris_hit_info.heavy = pdebris;
debris_hit_info.light = pship;
} else {
debris_hit_info.heavy = pship;
debris_hit_info.light = pdebris;
}
hit = debris_check_collision(pdebris, pship, &hitpos, &debris_hit_info );
if ( hit )
{
Script_system.SetHookObjects(4, "Ship", pship, "Debris", pdebris, "Self", pship, "Object", pdebris);
bool ship_override = Script_system.IsConditionOverride(CHA_COLLIDEDEBRIS, pship);
Script_system.SetHookObjects(2, "Self",pdebris, "Object", pship);
bool debris_override = Script_system.IsConditionOverride(CHA_COLLIDESHIP, pdebris);
if(!ship_override && !debris_override)
{
float ship_damage;
float debris_damage;
// do collision physics
calculate_ship_ship_collision_physics( &debris_hit_info );
if ( debris_hit_info.impulse < 0.5f )
return 0;
// calculate ship damage
ship_damage = 0.005f * debris_hit_info.impulse; // Cut collision-based damage in half.
// Decrease heavy damage by 2x.
if (ship_damage > 5.0f)
ship_damage = 5.0f + (ship_damage - 5.0f)/2.0f;
// calculate debris damage and set debris damage to greater or debris and ship
// debris damage is needed since we can really whack some small debris with afterburner and not do
// significant damage to ship but the debris goes off faster than afterburner speed.
debris_damage = debris_hit_info.impulse/pdebris->phys_info.mass; // ie, delta velocity of debris
debris_damage = (debris_damage > ship_damage) ? debris_damage : ship_damage;
// modify ship damage by debris damage multiplier
ship_damage *= Debris[pdebris->instance].damage_mult;
// supercaps cap damage at 10-20% max hull ship damage
if (Ship_info[Ships[pship->instance].ship_info_index].flags[Ship::Info_Flags::Supercap]) {
float cap_percent_damage = frand_range(0.1f, 0.2f);
ship_damage = MIN(ship_damage, cap_percent_damage * Ships[pship->instance].ship_max_hull_strength);
}
// apply damage to debris
debris_hit( pdebris, pship, &hitpos, debris_damage); // speed => damage
int quadrant_num, apply_ship_damage;
// apply damage to ship unless 1) debris is from ship
apply_ship_damage = !(pship->signature == pdebris->parent_sig);
if ( debris_hit_info.heavy == pship ) {
quadrant_num = get_ship_quadrant_from_global(&hitpos, pship);
if ((pship->flags[Object::Object_Flags::No_shields]) || !ship_is_shield_up(pship, quadrant_num) ) {
quadrant_num = -1;
}
if (apply_ship_damage) {
ship_apply_local_damage(debris_hit_info.heavy, debris_hit_info.light, &hitpos, ship_damage, quadrant_num, CREATE_SPARKS, debris_hit_info.submodel_num);
}
} else {
// don't draw sparks using sphere hit position
if (apply_ship_damage) {
ship_apply_local_damage(debris_hit_info.light, debris_hit_info.heavy, &hitpos, ship_damage, MISS_SHIELDS, NO_SPARKS);
}
}
// maybe print Collision on HUD
if ( pship == Player_obj ) {
hud_start_text_flash(XSTR("Collision", 1431), 2000);
}
collide_ship_ship_do_sound(&hitpos, pship, pdebris, pship==Player_obj);
}
Script_system.SetHookObjects(2, "Self",pship, "Object", pdebris);
if(!(debris_override && !ship_override))
Script_system.RunCondition(CHA_COLLIDEDEBRIS, '\0', NULL, pship);
Script_system.SetHookObjects(2, "Self",pdebris, "Object", pship);
if((debris_override && !ship_override) || (!debris_override && !ship_override))
Script_system.RunCondition(CHA_COLLIDESHIP, '\0', NULL, pdebris);
Script_system.RemHookVars(4, "Ship", "Debris", "Self", "Object");
return 0;
}
} else { // Bounding spheres don't intersect, set timestamp for next collision check.
float ship_max_speed, debris_speed;
float time;
ship *shipp;
shipp = &Ships[pship->instance];
if (ship_is_beginning_warpout_speedup(pship)) {
ship_max_speed = MAX(ship_get_max_speed(shipp), ship_get_warpout_speed(pship));
} else {
ship_max_speed = ship_get_max_speed(shipp);
}
ship_max_speed = MAX(ship_max_speed, 10.0f);
ship_max_speed = MAX(ship_max_speed, pship->phys_info.vel.xyz.z);
debris_speed = pdebris->phys_info.speed;
time = 1000.0f * (dist - pship->radius - pdebris->radius - 10.0f) / (ship_max_speed + debris_speed); // 10.0f is a safety factor
time -= 200.0f; // allow one frame slow frame at ~5 fps
if (time > 100) {
pair->next_check_time = timestamp( fl2i(time) );
} else {
pair->next_check_time = timestamp(0); // check next time
}
}
return 0;
}
// Checks debris-ship collisions. pair->a is debris and pair->b is ship.
// Returns 1 if all future collisions between these can be ignored
int collide_debris_ship( obj_pair * pair )
{
float dist;
object *pdebris = pair->a;
object *pship = pair->b;
// Don't check collisions for warping out player
if ( Player->control_mode != PCM_NORMAL ) {
if ( pship == Player_obj )
return 0;
}
Assert( pdebris->type == OBJ_DEBRIS );
Assert( pship->type == OBJ_SHIP );
/* Debris_ship_count++;
if (Debris_ship_count % 100 == 0)
nprintf(("AI", "Done %i debris:ship checks in %i frames = %.2f checks/frame\n", Debris_ship_count, Framecount, (float) Debris_ship_count/Framecount));
*/
dist = vm_vec_dist( &pdebris->pos, &pship->pos );
if ( dist < pdebris->radius + pship->radius ) {
int hit;
vector hitpos;
// create and initialize ship_ship_hit_info struct
collision_info_struct debris_hit_info;
memset( &debris_hit_info, -1, sizeof(collision_info_struct) );
if ( pdebris->phys_info.mass > pship->phys_info.mass ) {
debris_hit_info.heavy = pdebris;
debris_hit_info.light = pship;
} else {
debris_hit_info.heavy = pship;
debris_hit_info.light = pdebris;
}
hit = debris_check_collision(pdebris, pship, &hitpos, &debris_hit_info );
if ( hit ) {
float ship_damage;
float debris_damage;
// do collision physics
calculate_ship_ship_collision_physics( &debris_hit_info );
if ( debris_hit_info.impulse < 0.5f )
return 0;
// calculate ship damage
ship_damage = 0.005f * debris_hit_info.impulse; // Cut collision-based damage in half.
// Decrease heavy damage by 2x.
if (ship_damage > 5.0f)
ship_damage = 5.0f + (ship_damage - 5.0f)/2.0f;
// calculate debris damage and set debris damage to greater or debris and ship
// debris damage is needed since we can really whack some small debris with afterburner and not do
// significant damage to ship but the debris goes off faster than afterburner speed.
debris_damage = debris_hit_info.impulse/pdebris->phys_info.mass; // ie, delta velocity of debris
debris_damage = (debris_damage > ship_damage) ? debris_damage : ship_damage;
// supercaps cap damage at 10-20% max hull ship damage
if (Ship_info[Ships[pship->instance].ship_info_index].flags & SIF_SUPERCAP) {
float cap_percent_damage = frand_range(0.1f, 0.2f);
ship_damage = min(ship_damage, cap_percent_damage * Ship_info[Ships[pship->instance].ship_info_index].initial_hull_strength);
}
// apply damage to debris
debris_hit( pdebris, pship, &hitpos, debris_damage); // speed => damage
int quadrant_num, apply_ship_damage;
// apply damage to ship unless 1) debris is from ship
// apply_ship_damage = !((pship->signature == pdebris->parent_sig) && ship_is_beginning_warpout_speedup(pship));
apply_ship_damage = !(pship->signature == pdebris->parent_sig);
if ( debris_hit_info.heavy == pship ) {
quadrant_num = get_ship_quadrant_from_global(&hitpos, pship);
if ((pship->flags & OF_NO_SHIELDS) || !ship_is_shield_up(pship, quadrant_num) ) {
quadrant_num = -1;
}
if (apply_ship_damage) {
ship_apply_local_damage(debris_hit_info.heavy, debris_hit_info.light, &hitpos, ship_damage, quadrant_num, CREATE_SPARKS, debris_hit_info.submodel_num);
}
} else {
// don't draw sparks using sphere hit position
if (apply_ship_damage) {
ship_apply_local_damage(debris_hit_info.light, debris_hit_info.heavy, &hitpos, ship_damage, MISS_SHIELDS, NO_SPARKS);
}
}
// maybe print Collision on HUD
if ( pship == Player_obj ) {
hud_start_text_flash(XSTR("Collision", 1431), 2000);
}
collide_ship_ship_do_sound(&hitpos, pship, pdebris, pship==Player_obj);
return 0;
}
} else { // Bounding spheres don't intersect, set timestamp for next collision check.
float ship_max_speed, debris_speed;
float time;
ship *shipp;
shipp = &Ships[pship->instance];
if (ship_is_beginning_warpout_speedup(pship)) {
ship_max_speed = max(ship_get_max_speed(shipp), ship_get_warp_speed(pship));
} else {
ship_max_speed = ship_get_max_speed(shipp);
}
ship_max_speed = max(ship_max_speed, 10.0f);
ship_max_speed = max(ship_max_speed, pship->phys_info.vel.xyz.z);
debris_speed = pdebris->phys_info.speed;
time = 1000.0f * (dist - pship->radius - pdebris->radius - 10.0f) / (ship_max_speed + debris_speed); // 10.0f is a safety factor
time -= 200.0f; // allow one frame slow frame at ~5 fps
if (time > 100) {
//nprintf(("AI", "Ship %s debris #%i delay time = %.1f seconds\n", Ships[pship->instance].ship_name, pdebris-Objects, time/1000.0f));
pair->next_check_time = timestamp( fl2i(time) );
} else {
pair->next_check_time = timestamp(0); // check next time
}
}
return 0;
}
