// Checks debris-weapon collisions. pair->a is debris and pair->b is weapon.
// Returns 1 if all future collisions between these can be ignored
int collide_debris_weapon( obj_pair * pair )
{
vector hitpos;
int hit;
object *pdebris = pair->a;
object *weapon = pair->b;
Assert( pdebris->type == OBJ_DEBRIS );
Assert( weapon->type == OBJ_WEAPON );
// first check the bounding spheres of the two objects.
hit = fvi_segment_sphere(&hitpos, &weapon->last_pos, &weapon->pos, &pdebris->pos, pdebris->radius);
if (hit) {
hit = debris_check_collision(pdebris, weapon, &hitpos );
if ( !hit )
return 0;
weapon_hit( weapon, pdebris, &hitpos );
debris_hit( pdebris, weapon, &hitpos, Weapon_info[Weapons[weapon->instance].weapon_info_index].damage );
return 0;
} else {
return weapon_will_never_hit( weapon, pdebris, pair );
}
}
/**
* Checks debris-weapon collisions.
* @param pair obj_pair pointer to the two objects. pair->a is debris and pair->b is weapon.
* @return 1 if all future collisions between these can be ignored
*/
int collide_debris_weapon( obj_pair * pair )
{
vec3d hitpos, hitnormal;
int hit;
object *pdebris = pair->a;
object *weapon_obj = pair->b;
Assert( pdebris->type == OBJ_DEBRIS );
Assert( weapon_obj->type == OBJ_WEAPON );
// first check the bounding spheres of the two objects.
hit = fvi_segment_sphere(&hitpos, &weapon_obj->last_pos, &weapon_obj->pos, &pdebris->pos, pdebris->radius);
if (hit) {
hit = debris_check_collision(pdebris, weapon_obj, &hitpos, NULL, &hitnormal );
if ( !hit )
return 0;
Script_system.SetHookObjects(4, "Weapon", weapon_obj, "Debris", pdebris, "Self", weapon_obj, "Object", pdebris);
bool weapon_override = Script_system.IsConditionOverride(CHA_COLLIDEDEBRIS, weapon_obj);
Script_system.SetHookObjects(2, "Self", pdebris, "Object", weapon_obj);
bool debris_override = Script_system.IsConditionOverride(CHA_COLLIDEWEAPON, pdebris);
if(!weapon_override && !debris_override)
{
weapon_hit( weapon_obj, pdebris, &hitpos, -1, &hitnormal );
debris_hit( pdebris, weapon_obj, &hitpos, Weapon_info[Weapons[weapon_obj->instance].weapon_info_index].damage );
}
Script_system.SetHookObjects(2, "Self", weapon_obj, "Object", pdebris);
if(!(debris_override && !weapon_override))
Script_system.RunCondition(CHA_COLLIDEDEBRIS, '\0', NULL, weapon_obj);
Script_system.SetHookObjects(2, "Self", pdebris, "Object", weapon_obj);
if((debris_override && !weapon_override) || (!debris_override && !weapon_override))
Script_system.RunCondition(CHA_COLLIDEWEAPON, '\0', NULL, pdebris, Weapons[weapon_obj->instance].weapon_info_index);
Script_system.RemHookVars(4, "Weapon", "Debris", "Self", "Object");
return 0;
} else {
return weapon_will_never_hit( weapon_obj, pdebris, pair );
}
}
/**
* 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;
}
