// Try and find a new locking point
void hud_lock_get_new_lock_pos(object* target_objp, vec3d* lock_world_pos)
{
ship* target_shipp = NULL;
ship_weapon* swp = NULL;
weapon_info* wip = NULL;
if (target_objp->type == OBJ_SHIP)
{
target_shipp = &Ships[target_objp->instance];
}
swp = &Player_ship->weapons;
wip = &Weapon_info[swp->secondary_bank_weapons[swp->current_secondary_bank]];
// If Javelin HS, only target engines.
if ((target_shipp) && wip->wi_flags & WIF_HOMING_JAVELIN)
{
Player->locking_subsys = ship_get_closest_subsys_in_sight(target_shipp, SUBSYSTEM_ENGINE, &Player_obj->pos);
if (Player->locking_subsys != NULL)
{
get_subsystem_world_pos(target_objp, Player->locking_subsys, lock_world_pos);
Player->locking_on_center = 0;
Player->locking_subsys_parent = Player_ai->target_objnum;
}
else
{
hud_lock_reset();
return;
}
}
else
{
// just go for the center
*lock_world_pos = target_objp->pos;
Player->locking_on_center = 1;
Player->locking_subsys = NULL;
Player->locking_subsys_parent = -1;
}
}
// hud_do_lock_indicator() manages missle locking, both the non-rendering calculations and the 2D HUD rendering
void hud_do_lock_indicator(float frametime)
{
ship_weapon *swp;
weapon_info *wip;
// if i'm a multiplayer observer, bail here
if((Game_mode & GM_MULTIPLAYER) && ((Net_player->flags & NETINFO_FLAG_OBSERVER) || (Player_obj->type == OBJ_OBSERVER)) ){
return;
}
Assert(Player_ai->target_objnum >= 0);
// be sure to unset this flag, then possibly set later in this function so that
// threat indicators work properly.
Player_ai->ai_flags.remove(AI::AI_Flags::Seek_lock);
if ( hud_abort_lock() ) {
hud_lock_reset();
return;
}
// if there is an EMP effect active, never update lock
if(emp_active_local()){
hud_lock_reset();
return;
}
swp = &Player_ship->weapons;
wip = &Weapon_info[swp->secondary_bank_weapons[swp->current_secondary_bank]];
Lock_start_dist = wip->min_lock_time * wip->lock_pixels_per_sec;
// if secondary weapons change, reset the lock
if ( hud_lock_secondary_weapon_changed(swp) ) {
hud_lock_reset();
}
Player_ai->last_secondary_index = swp->current_secondary_bank;
object *tobjp = &Objects[Player_ai->target_objnum];
vec3d dir_to_target;
vm_vec_normalized_dir(&dir_to_target, &tobjp->pos, &Player_obj->pos);
if ( !(wip->is_locked_homing()) ) {
hud_lock_reset();
return;
}
// Allow locking on ships and bombs (only targeted weapon allowed is a bomb, so don't bother checking flags)
if ( (Objects[Player_ai->target_objnum].type != OBJ_SHIP) && (Objects[Player_ai->target_objnum].type != OBJ_WEAPON) ) {
hud_lock_reset();
return;
}
// Javelins must lock on engines if locking on a ship and those must be in sight
if (wip->wi_flags[Weapon::Info_Flags::Homing_javelin] &&
tobjp->type == OBJ_SHIP &&
Player->locking_subsys != NULL) {
vec3d subobj_pos;
vm_vec_unrotate(&subobj_pos, &Player->locking_subsys->system_info->pnt, &tobjp->orient);
vm_vec_add2(&subobj_pos, &tobjp->pos);
int target_subsys_in_sight = ship_subsystem_in_sight(tobjp, Player->locking_subsys, &Player_obj->pos, &subobj_pos);
if (!target_subsys_in_sight || Player->locking_subsys->system_info->type != SUBSYSTEM_ENGINE) {
Player->locking_subsys =
ship_get_closest_subsys_in_sight(&Ships[tobjp->instance], SUBSYSTEM_ENGINE, &Player_obj->pos);
}
}
if (wip->wi_flags[Weapon::Info_Flags::Homing_javelin] &&
tobjp->type == OBJ_SHIP &&
Player->locking_subsys == NULL) {
Player->locking_subsys =
ship_get_closest_subsys_in_sight(&Ships[tobjp->instance], SUBSYSTEM_ENGINE, &Player_obj->pos);
if (Player->locking_subsys == NULL) {
hud_lock_reset();
return;
}
}
hud_lock_determine_lock_point(&lock_world_pos);
if ( !hud_lock_has_homing_point() ) {
Player->target_in_lock_cone=0;
}
hud_lock_check_if_target_in_lock_cone();
// check if the target is within range of the current secondary weapon. If it is not,
// a lock will not be detected
if ( !hud_lock_target_in_range() ) {
Player->target_in_lock_cone = 0;
}
// If locking on a subsystem, and not in sight... can't lock
// Changed by MK on 4/3/98. It was confusing me that my hornets would not lock on my target.
// It will now be confusing that they lock, but don't home on your subsystem, but I think that's preferable.
// Often you really care about destroying the target, not just the subsystem.
/*if ( Player_ai->targeted_subsys ) {
if ( !hud_lock_on_subsys_ok() ) {
Player->target_in_lock_cone=0;
}
}*/
if ( !Player->target_in_lock_cone ) {
Player->locking_on_center=0;
Player->locking_subsys_parent=-1;
Player->locking_subsys=NULL;
}
hud_calculate_lock_position(frametime);
if (!Players[Player_num].lock_indicator_visible)
return;
if (Player_ai->current_target_is_locked) {
if ( Missile_track_loop > -1 ) {
snd_stop(Missile_track_loop);
Missile_track_loop = -1;
if (wip->hud_locked_snd >= 0)
{
Missile_lock_loop = snd_play(&Snds[wip->hud_locked_snd]);
}
else
{
Missile_lock_loop = snd_play(&Snds[ship_get_sound(Player_obj, SND_MISSILE_LOCK)]);
}
}
}
else {
Player_ai->ai_flags.set(AI::AI_Flags::Seek_lock); // set this flag so multiplayer's properly track lock on other ships
if ( Missile_lock_loop != -1 && snd_is_playing(Missile_lock_loop) ) {
snd_stop(Missile_lock_loop);
Missile_lock_loop = -1;
}
}
}
// Decide which point lock should be homing on
void hud_lock_determine_lock_point(vec3d *lock_world_pos_out)
{
object *target_objp;
ship_weapon *swp;
weapon_info *wip;
vec3d vec_to_lock_pos;
vec3d lock_local_pos;
Assert(Player_ai->target_objnum >= 0);
target_objp = &Objects[Player_ai->target_objnum];
Player->current_target_sx = -1;
Player->current_target_sy = -1;
swp = &Player_ship->weapons;
wip = &Weapon_info[swp->secondary_bank_weapons[swp->current_secondary_bank]];
// If subsystem is targeted, we must try to lock on that
if ( Player_ai->targeted_subsys && !(wip->wi_flags[Weapon::Info_Flags::Homing_javelin]) ) {
hud_lock_update_lock_pos(target_objp);
Player->locking_on_center=0;
Player->locking_subsys=Player_ai->targeted_subsys;
Player->locking_subsys_parent=Player_ai->target_objnum;
} else if ( (wip->wi_flags[Weapon::Info_Flags::Homing_javelin]) && (target_objp->type == OBJ_SHIP)) {
if (!Player->locking_subsys ||
Player->locking_subsys->system_info->type != SUBSYSTEM_ENGINE) {
Player->locking_subsys = ship_get_closest_subsys_in_sight(&Ships[target_objp->instance], SUBSYSTEM_ENGINE, &Player_obj->pos);
}
if (Player->locking_subsys != NULL) {
get_subsystem_world_pos(target_objp, Player->locking_subsys, &lock_world_pos);
Player->locking_on_center=0;
Player->locking_subsys_parent=Player_ai->target_objnum;
} else {
hud_lock_reset();
return;
}
} else {
// See if we already have a successful locked point
if ( hud_lock_has_homing_point() ) {
hud_lock_update_lock_pos(target_objp);
} else {
hud_lock_get_new_lock_pos(target_objp);
}
}
*lock_world_pos_out=lock_world_pos;
vm_vec_sub(&vec_to_lock_pos,&lock_world_pos,&Player_obj->pos);
vm_vec_rotate(&lock_local_pos,&vec_to_lock_pos,&Player_obj->orient);
if ( lock_local_pos.xyz.z > 0.0f ) {
// Get the location of our target in the "virtual frame" where the locking computation will be done
float w = 1.0f / lock_local_pos.xyz.z;
// Let's force our "virtual frame" to be 640x480. -MageKing17
float sx = gr_screen.clip_center_x + (lock_local_pos.xyz.x * VIRTUAL_FRAME_HALF_WIDTH * w);
float sy = gr_screen.clip_center_y - (lock_local_pos.xyz.y * VIRTUAL_FRAME_HALF_HEIGHT * w);
Player->current_target_sx = (int)sx;
Player->current_target_sy = (int)sy;
}
}
// Try and find a new locking point
void hud_lock_get_new_lock_pos(object *target_objp)
{
ship *target_shipp=NULL;
int lock_in_range=0;
float best_lock_dot=-1.0f, lock_dot=-1.0f;
ship_subsys *ss;
vec3d subsys_world_pos, vec_to_lock;
ship_weapon *swp;
weapon_info *wip;
if ( target_objp->type == OBJ_SHIP ) {
target_shipp = &Ships[target_objp->instance];
}
swp = &Player_ship->weapons;
wip = &Weapon_info[swp->secondary_bank_weapons[swp->current_secondary_bank]];
// if a large ship, lock to pos closest to center and within range
if ( (target_shipp) && (Ship_info[target_shipp->ship_info_index].is_big_or_huge()) &&
!(wip->wi_flags[Weapon::Info_Flags::Homing_javelin]) ) {
// check all the subsystems and the center of the ship
// assume best lock pos is the center of the ship
lock_world_pos = target_objp->pos;
Player->locking_on_center=1;
Player->locking_subsys=NULL;
Player->locking_subsys_parent=-1;
lock_in_range = hud_lock_world_pos_in_range(&lock_world_pos, &vec_to_lock);
vm_vec_normalize(&vec_to_lock);
if ( lock_in_range ) {
best_lock_dot=vm_vec_dot(&Player_obj->orient.vec.fvec, &vec_to_lock);
}
// take center if reasonable dot
if ( best_lock_dot > 0.95 ) {
return;
}
// iterate through subsystems to see if we can get a better choice
ss = GET_FIRST(&target_shipp->subsys_list);
while ( ss != END_OF_LIST( &target_shipp->subsys_list ) ) {
// get world pos of subsystem
get_subsystem_world_pos(target_objp, ss, &subsys_world_pos);
if ( hud_lock_world_pos_in_range(&subsys_world_pos, &vec_to_lock) ) {
vm_vec_normalize(&vec_to_lock);
lock_dot=vm_vec_dot(&Player_obj->orient.vec.fvec, &vec_to_lock);
if ( lock_dot > best_lock_dot ) {
best_lock_dot=lock_dot;
Player->locking_on_center=0;
Player->locking_subsys=ss;
Player->locking_subsys_parent=Player_ai->target_objnum;
lock_world_pos = subsys_world_pos;
}
}
ss = GET_NEXT( ss );
}
} else if ( (target_shipp) && (wip->wi_flags[Weapon::Info_Flags::Homing_javelin])) {
Player->locking_subsys = ship_get_closest_subsys_in_sight(target_shipp, SUBSYSTEM_ENGINE, &Player_obj->pos);
if (Player->locking_subsys != NULL) {
get_subsystem_world_pos(target_objp, Player->locking_subsys, &lock_world_pos);
Player->locking_on_center=0;
Player->locking_subsys_parent=Player_ai->target_objnum;
} else {
hud_lock_reset();
return;
}
} else {
// if small ship (or weapon), just go for the center
lock_world_pos = target_objp->pos;
Player->locking_on_center=1;
Player->locking_subsys=NULL;
Player->locking_subsys_parent=-1;
}
}
// Decide which point lock should be homing on
void hud_lock_determine_lock_point(vec3d* lock_world_pos_out)
{
vec3d lock_world_pos;
object* target_objp;
ship_weapon* swp;
weapon_info* wip;
vec3d vec_to_lock_pos;
vec3d lock_local_pos;
Assert(Player_ai->target_objnum >= 0);
target_objp = &Objects[Player_ai->target_objnum];
Player->current_target_sx = -1;
Player->current_target_sx = -1;
swp = &Player_ship->weapons;
wip = &Weapon_info[swp->secondary_bank_weapons[swp->current_secondary_bank]];
// If subsystem is targeted, we must try to lock on that
if (Player_ai->targeted_subsys && !(wip->wi_flags & WIF_HOMING_JAVELIN))
{
hud_lock_update_lock_pos(target_objp, &lock_world_pos);
Player->locking_on_center = 0;
Player->locking_subsys = Player_ai->targeted_subsys;
Player->locking_subsys_parent = Player_ai->target_objnum;
}
else if (wip->wi_flags & WIF_HOMING_JAVELIN && target_objp->type == OBJ_SHIP)
{
if (!Player->locking_subsys ||
Player->locking_subsys->system_info->type != SUBSYSTEM_ENGINE)
{
Player->locking_subsys = ship_get_closest_subsys_in_sight(&Ships[target_objp->instance],
SUBSYSTEM_ENGINE, &Player_obj->pos);
}
if (Player->locking_subsys != NULL)
{
get_subsystem_world_pos(target_objp, Player->locking_subsys, &lock_world_pos);
Player->locking_on_center = 0;
Player->locking_subsys_parent = Player_ai->target_objnum;
}
else
{
hud_lock_reset();
return;
}
}
else
{
// See if we already have a successful locked point
if (hud_lock_has_homing_point())
{
hud_lock_update_lock_pos(target_objp, &lock_world_pos);
}
else
{
hud_lock_get_new_lock_pos(target_objp, &lock_world_pos);
}
}
*lock_world_pos_out = lock_world_pos;
vm_vec_sub(&vec_to_lock_pos, &lock_world_pos, &Player_obj->pos);
vm_vec_rotate(&lock_local_pos, &vec_to_lock_pos, &Player_obj->orient);
if (lock_local_pos.xyz.z > 0.0f)
{
// Get the location of our target in the "virtual frame" where the locking computation will be done
float w = 1.0f / lock_local_pos.xyz.z;
float sx = ((gr_screen.clip_center_x * 2.0f) + (lock_local_pos.xyz.x * (gr_screen.clip_center_x * 2.0f) * w)) *
0.5f;
float sy = ((gr_screen.clip_center_y * 2.0f) - (lock_local_pos.xyz.y * (gr_screen.clip_center_y * 2.0f) * w)) *
0.5f;
Player->current_target_sx = (int)sx;
Player->current_target_sy = (int)sy;
}
}
