/**
* @brief Check if one type of battery (missile or laser) can shoot now.
* @param[in] installation Pointer to the firing intallation.
* @param[in] weapons The installation weapon to check and fire.
*/
static void AIRFIGHT_InstallationShoot (const installation_t *installation, baseWeapon_t *weapons, int maxWeapons)
{
int i, test;
float distance;
for (i = 0; i < maxWeapons; i++) {
aircraft_t *target = weapons[i].target;
aircraftSlot_t *slot = &(weapons[i].slot);
/* if no target, can't shoot */
if (!target)
continue;
/* If the weapon is not ready in base, can't shoot. */
if (slot->installationTime > 0)
continue;
/* if weapon is reloading, can't shoot */
if (slot->delayNextShot > 0)
continue;
/* check that the ufo is still visible */
if (!UFO_IsUFOSeenOnGeoscape(target)) {
weapons[i].target = NULL;
continue;
}
/* Check if we can still fire on this target. */
distance = GetDistanceOnGlobe(installation->pos, target->pos);
test = AIRFIGHT_CheckWeapon(slot, distance);
/* weapon unable to shoot, reset target */
if (test == AIRFIGHT_WEAPON_CAN_NEVER_SHOOT) {
weapons[i].target = NULL;
continue;
}
/* we can't shoot with this weapon atm, wait to see if UFO comes closer */
else if (test == AIRFIGHT_WEAPON_CAN_NOT_SHOOT_AT_THE_MOMENT)
continue;
/* target is too far, wait to see if UFO comes closer */
else if (distance > slot->ammo->craftitem.stats[AIR_STATS_WRANGE])
continue;
/* shoot */
if (AIRFIGHT_AddProjectile(NULL, installation, NULL, target, slot)) {
slot->delayNextShot = slot->ammo->craftitem.weaponDelay;
/* will we miss the target ? */
if (frand() > AIRFIGHT_ProbabilityToHit(NULL, target, slot))
AIRFIGHT_MissTarget(&ccs.projectiles[ccs.numProjectiles - 1], qfalse);
}
}
}
/**
* @sa AIR_IsAircraftOnGeoscape
*/
aircraft_t *UFO_GetNextOnGeoscape (aircraft_t *lastUFO)
{
aircraft_t* ufo = lastUFO;
while ((ufo = UFO_GetNext(ufo)) != NULL) {
if (UFO_IsUFOSeenOnGeoscape(ufo)
#ifdef DEBUG
|| Cvar_GetInteger("debug_showufos")
#endif
)
return ufo;
}
return NULL;
}
/**
* @brief Check if the ufo can shoot at a PHALANX aircraft
*/
static void UFO_SearchAircraftTarget (const campaign_t* campaign, aircraft_t *ufo)
{
float distance = 999999.;
/* UFO never try to attack a PHALANX aircraft except if they came on earth in that aim */
if (ufo->mission->stage != STAGE_INTERCEPT) {
/* Check if UFO is defending itself */
if (ufo->aircraftTarget)
UFO_CheckShootBack(campaign, ufo, ufo->aircraftTarget);
return;
}
/* check if the ufo is already attacking an aircraft */
if (ufo->aircraftTarget) {
/* check if the target disappeared from geoscape (fled in a base) */
if (AIR_IsAircraftOnGeoscape(ufo->aircraftTarget))
AIRFIGHT_ExecuteActions(campaign, ufo, ufo->aircraftTarget);
else
ufo->aircraftTarget = NULL;
return;
}
ufo->status = AIR_TRANSIT;
AIR_Foreach(phalanxAircraft) {
/* check that aircraft is flying */
if (AIR_IsAircraftOnGeoscape(phalanxAircraft)) {
/* get the distance from ufo to aircraft */
const float dist = GetDistanceOnGlobe(ufo->pos, phalanxAircraft->pos);
/* check out of reach */
if (dist > MAX_DETECTING_RANGE)
continue;
/* choose the nearest target */
if (dist < distance) {
distance = dist;
if (UFO_SendPursuingAircraft(ufo, phalanxAircraft) && UFO_IsUFOSeenOnGeoscape(ufo)) {
/* stop time and notify */
MSO_CheckAddNewMessage(NT_UFO_ATTACKING, _("Notice"), va(_("A UFO is flying toward %s"), phalanxAircraft->name), qfalse,
MSG_STANDARD, NULL);
/** @todo present a popup with possible orders like: return to base, attack the ufo, try to flee the rockets */
}
}
}
}
}
/**
* @brief Check if the ufo can shoot at a PHALANX aircraft and whether it should follow another ufo
*/
static void UFO_SearchAircraftTarget (const campaign_t* campaign, aircraft_t* ufo, float maxDetectionRange = MAX_DETECTING_RANGE)
{
float distance = 999999.;
/* UFO never try to attack a PHALANX aircraft except if they came on earth in that aim */
if (ufo->mission->stage != STAGE_INTERCEPT) {
/* Check if UFO is defending itself */
if (ufo->aircraftTarget)
UFO_CheckShootBack(campaign, ufo, ufo->aircraftTarget);
return;
}
/* check if the ufo is already attacking an aircraft */
if (ufo->aircraftTarget) {
/* check if the target disappeared from geoscape (fled in a base) */
if (AIR_IsAircraftOnGeoscape(ufo->aircraftTarget))
AIRFIGHT_ExecuteActions(campaign, ufo, ufo->aircraftTarget);
else
ufo->aircraftTarget = nullptr;
return;
}
ufo->status = AIR_TRANSIT;
AIR_Foreach(phalanxAircraft) {
/* check that aircraft is flying */
if (AIR_IsAircraftOnGeoscape(phalanxAircraft)) {
/* get the distance from ufo to aircraft */
const float dist = GetDistanceOnGlobe(ufo->pos, phalanxAircraft->pos);
/* check out of reach */
if (dist > maxDetectionRange)
continue;
/* choose the nearest target */
if (dist < distance) {
distance = dist;
if (UFO_SendPursuingAircraft(ufo, phalanxAircraft) && UFO_IsUFOSeenOnGeoscape(ufo)) {
/* stop time and notify */
MSO_CheckAddNewMessage(NT_UFO_ATTACKING, _("Notice"), va(_("A UFO is flying toward %s"), phalanxAircraft->name));
/** @todo present a popup with possible orders like: return to base, attack the ufo, try to flee the rockets */
return;
}
}
}
}
/* if this ufo is a leader, it does not try to search another one */
if (ufo->leader)
return;
aircraft_t* otherUFO = nullptr;
const float polarCoordinatesOffset = 1.0f;
while ((otherUFO = UFO_GetNextOnGeoscape(otherUFO)) != nullptr) {
if (otherUFO == ufo)
continue;
if (otherUFO->leader) {
vec2_t dest;
AIR_GetDestinationWhilePursuing(ufo, otherUFO, dest);
dest[0] += polarCoordinatesOffset;
dest[1] += polarCoordinatesOffset;
GEO_CalcLine(ufo->pos, dest, &ufo->route);
ufo->time = 0;
ufo->point = 0;
break;
}
}
}
