bool
TacticalAI::CheckObjectives()
{
bool processed = false;
Ship* ward = 0;
Element* elem = ship->GetElement();
if (elem) {
Instruction* obj = elem->GetTargetObjective();
if (obj) {
ship_ai->ClearPatrol();
if (obj->Action()) {
switch (obj->Action()) {
case Instruction::INTERCEPT:
case Instruction::STRIKE:
case Instruction::ASSAULT:
{
SimObject* tgt = obj->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP) {
roe = DIRECTED;
SelectTargetDirected((Ship*) tgt);
}
}
break;
case Instruction::DEFEND:
case Instruction::ESCORT:
{
SimObject* tgt = obj->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP) {
roe = DEFENSIVE;
ward = (Ship*) tgt;
}
}
break;
default:
break;
}
}
orders = obj;
processed = true;
}
}
ship_ai->SetWard(ward);
return processed;
}
void
FighterTacticalAI::SelectTarget()
{
TacticalAI::SelectTarget();
SimObject* target = ship_ai->GetTarget();
if (target && (target->Type() == SimObject::SIM_SHIP) &&
(Game::GameTime() - secondary_selection_time) > THREAT_REACTION_TIME) {
SelectSecondaryForTarget((Ship*) target);
secondary_selection_time = Game::GameTime();
}
}
void
Element::ResumeAssignment()
{
SetAssignment(0);
if (objectives.isEmpty())
return;
Instruction* objective = 0;
for (int i = 0; i < objectives.size() && !objective; i++) {
Instruction* instr = objectives[i];
if (instr->Status() <= Instruction::ACTIVE) {
switch (instr->Action()) {
case Instruction::INTERCEPT:
case Instruction::STRIKE:
case Instruction::ASSAULT:
objective = instr;
break;
}
}
}
if (objective) {
Sim* sim = Sim::GetSim();
ListIter<Element> iter = sim->GetElements();
while (++iter) {
Element* elem = iter.value();
SimObject* tgt = objective->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP && elem->Contains((const Ship*) tgt)) {
SetAssignment(elem);
return;
}
}
}
}
void
TacticalAI::CheckTarget()
{
SimObject* tgt = ship_ai->GetTarget();
if (!tgt) return;
if (tgt->GetRegion() != ship->GetRegion()) {
ship_ai->DropTarget();
return;
}
if (tgt->Type() == SimObject::SIM_SHIP) {
Ship* target = (Ship*) tgt;
// has the target joined our side?
if (target->GetIFF() == ship->GetIFF() && !target->IsRogue()) {
ship_ai->DropTarget();
return;
}
// is the target already jumping/breaking/dying?
if (target->InTransition()) {
ship_ai->DropTarget();
return;
}
// have we been ordered to pursue the target?
if (directed_tgtid) {
if (directed_tgtid != target->Identity()) {
ship_ai->DropTarget();
}
return;
}
// can we catch the target?
if (target->Design()->vlimit <= ship->Design()->vlimit ||
ship->Velocity().length() <= ship->Design()->vlimit)
return;
// is the target now out of range?
WeaponDesign* wep_dsn = ship->GetPrimaryDesign();
if (!wep_dsn)
return;
// compute the "give up" range:
double drop_range = 3 * wep_dsn->max_range;
if (drop_range > 0.75 * ship->Design()->commit_range)
drop_range = 0.75 * ship->Design()->commit_range;
double range = Point(target->Location() - ship->Location()).length();
if (range < drop_range)
return;
// is the target closing or separating?
Point delta = (target->Location() + target->Velocity()) -
(ship->Location() + ship->Velocity());
if (delta.length() < range)
return;
ship_ai->DropTarget();
}
else if (tgt->Type() == SimObject::SIM_DRONE) {
Drone* drone = (Drone*) tgt;
// is the target still a threat?
if (drone->GetEta() < 1 || drone->GetTarget() == 0)
ship_ai->DropTarget();
}
}
void
TacticalAI::SelectTargetOpportunity()
{
// NON-COMBATANTS do not pick targets of opportunity:
if (ship->GetIFF() == 0)
return;
SimObject* potential_target = 0;
// pick the closest combatant ship with a different IFF code:
double target_dist = ship->Design()->commit_range;
SimObject* ward = ship_ai->GetWard();
// FRIGATES are primarily anti-air platforms, but may
// also attack smaller starships:
if (ship->Class() == Ship::CORVETTE || ship->Class() == Ship::FRIGATE) {
Ship* current_ship_target = 0;
Shot* current_shot_target = 0;
// if we are escorting a larger warship, it is good to attack
// the same target as our ward:
if (ward) {
Ship* s = (Ship*) ward;
if (s->Class() > ship->Class()) {
SimObject* obj = s->GetTarget();
if (obj && obj->Type() == SimObject::SIM_SHIP) {
current_ship_target = (Ship*) obj;
target_dist = (ship->Location() - obj->Location()).length();
}
}
}
ListIter<Contact> contact = ship->ContactList();
while (++contact) {
Ship* c_ship = contact->GetShip();
Shot* c_shot = contact->GetShot();
if (!c_ship && !c_shot)
continue;
int c_iff = contact->GetIFF(ship);
bool rogue = c_ship && c_ship->IsRogue();
bool tgt_ok = c_iff > 0 &&
c_iff != ship->GetIFF() &&
c_iff < 1000;
if (rogue || tgt_ok) {
if (c_ship && c_ship != ship && !c_ship->InTransition()) {
if (c_ship->Class() < Ship::DESTROYER ||
(c_ship->Class() >= Ship::MINE && c_ship->Class() <= Ship::DEFSAT)) {
// found an enemy, check distance:
double dist = (ship->Location() - c_ship->Location()).length();
if (dist < 0.75 * target_dist &&
(!current_ship_target || c_ship->Class() <= current_ship_target->Class())) {
current_ship_target = c_ship;
target_dist = dist;
}
}
}
else if (c_shot) {
// found an enemy shot, is there enough time to engage?
if (c_shot->GetEta() < 3)
continue;
// found an enemy shot, check distance:
double dist = (ship->Location() - c_shot->Location()).length();
if (!current_shot_target) {
current_shot_target = c_shot;
target_dist = dist;
}
// is this shot a better target than the one we've found?
else {
Ship* ward = ship_ai->GetWard();
if ((c_shot->IsTracking(ward) || c_shot->IsTracking(ship)) &&
(!current_shot_target->IsTracking(ward) ||
!current_shot_target->IsTracking(ship))) {
current_shot_target = c_shot;
target_dist = dist;
}
else if (dist < target_dist) {
current_shot_target = c_shot;
target_dist = dist;
}
}
}
}
}
if (current_shot_target)
potential_target = current_shot_target;
else
potential_target = current_ship_target;
}
// ALL OTHER SHIP CLASSES ignore fighters and only engage
// other starships:
else {
List<Ship> ward_threats;
ListIter<Contact> contact = ship->ContactList();
while (++contact) {
Ship* c_ship = contact->GetShip();
if (!c_ship)
continue;
int c_iff = contact->GetIFF(ship);
bool rogue = c_ship->IsRogue();
bool tgt_ok = c_ship != ship &&
c_iff > 0 &&
c_iff != ship->GetIFF() &&
!c_ship->InTransition();
if (rogue || tgt_ok) {
if (c_ship->IsStarship() || c_ship->IsStatic()) {
// found an enemy, check distance:
double dist = (ship->Location() - c_ship->Location()).length();
if (dist < 0.75 * target_dist) {
potential_target = c_ship;
target_dist = dist;
}
if (ward && c_ship->IsTracking(ward)) {
ward_threats.append(c_ship);
}
}
}
}
// if this ship is protecting a ward,
// prefer targets that are threatening that ward:
if (potential_target && ward_threats.size() && !ward_threats.contains((Ship*)potential_target)) {
target_dist *= 2;
ListIter<Ship> iter = ward_threats;
while (++iter) {
Ship* threat = iter.value();
double dist = (ward->Location() - threat->Location()).length();
if (dist < target_dist) {
potential_target = threat;
target_dist = dist;
}
}
}
}
if (ship->Class() != Ship::CARRIER && ship->Class() != Ship::SWACS)
ship_ai->SetTarget(potential_target);
}
void
TacticalAI::SelectTarget()
{
if (!ship) {
roe = NONE;
return;
}
// unarmed vessels should never engage an enemy:
if (ship->Weapons().size() < 1)
roe = NONE;
SimObject* target = ship_ai->GetTarget();
SimObject* ward = ship_ai->GetWard();
// if not allowed to engage, drop and return:
if (roe == NONE) {
if (target)
ship_ai->DropTarget();
return;
}
// if we have abandoned our ward, drop and return:
if (ward && roe != AGRESSIVE) {
double d = (ward->Location() - ship->Location()).length();
double safe_zone = 50e3;
if (target) {
if (ship->IsStarship())
safe_zone = 100e3;
if (d > safe_zone) {
ship_ai->DropTarget();
return;
}
}
else {
if (d > safe_zone) {
return;
}
}
}
// already have a target, keep it:
if (target) {
if (target->Life()) {
CheckTarget();
// frigates need to be ready to abandon ship-type targets
// in favor of drone-type targets, others should just go
// with what they have:
if (ship->Class() != Ship::CORVETTE && ship->Class() != Ship::FRIGATE)
return;
// in case the check decided to drop the target:
target = ship_ai->GetTarget();
}
// if the old target is dead, forget it:
else {
ship_ai->DropTarget();
target = 0;
}
}
// if not allowed to acquire, forget it:
if (ship_ai->DropTime() > 0)
return;
if (roe == DIRECTED) {
if (target && target->Type() == SimObject::SIM_SHIP)
SelectTargetDirected((Ship*) target);
else if (navpt && navpt->GetTarget() && navpt->GetTarget()->Type() == SimObject::SIM_SHIP)
SelectTargetDirected((Ship*) navpt->GetTarget());
else
SelectTargetDirected();
}
else {
SelectTargetOpportunity();
// don't switch one ship target for another...
if (ship->Class() == Ship::CORVETTE || ship->Class() == Ship::FRIGATE) {
SimObject* potential_target = ship_ai->GetTarget();
if (target && potential_target && target != potential_target) {
if (target->Type() == SimObject::SIM_SHIP &&
potential_target->Type() == SimObject::SIM_SHIP) {
ship_ai->SetTarget(target);
}
}
}
}
}
bool
TacticalAI::CheckFlightPlan()
{
Ship* ward = 0;
// Find next Instruction:
navpt = ship->GetNextNavPoint();
roe = FLEXIBLE;
if (navpt) {
switch (navpt->Action()) {
case Instruction::LAUNCH:
case Instruction::DOCK:
case Instruction::RTB: roe = NONE;
break;
case Instruction::VECTOR: roe = SELF_DEFENSIVE;
break;
case Instruction::DEFEND:
case Instruction::ESCORT: roe = DEFENSIVE;
break;
case Instruction::INTERCEPT:
roe = DIRECTED;
break;
case Instruction::RECON:
case Instruction::STRIKE:
case Instruction::ASSAULT: roe = DIRECTED;
break;
case Instruction::PATROL:
case Instruction::SWEEP: roe = FLEXIBLE;
break;
default: break;
}
if (roe == DEFENSIVE) {
SimObject* tgt = navpt->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP)
ward = (Ship*) tgt;
}
if (navpt->EMCON() > 0) {
int desired_emcon = navpt->EMCON();
if (ship_ai && (ship_ai->GetThreat() || ship_ai->GetThreatMissile()))
desired_emcon = 3;
if (ship->GetEMCON() != desired_emcon)
ship->SetEMCON(desired_emcon);
}
}
if (ship_ai)
ship_ai->SetWard(ward);
return (navpt != 0);
}
bool
TacticalAI::ProcessOrders()
{
if (ship_ai)
ship_ai->ClearPatrol();
if (orders && orders->EMCON() > 0) {
int desired_emcon = orders->EMCON();
if (ship_ai && (ship_ai->GetThreat() || ship_ai->GetThreatMissile()))
desired_emcon = 3;
if (ship->GetEMCON() != desired_emcon)
ship->SetEMCON(desired_emcon);
}
if (orders && orders->Action()) {
switch (orders->Action()) {
case RadioMessage::ATTACK:
case RadioMessage::BRACKET:
case RadioMessage::IDENTIFY:
{
bool tgt_ok = false;
SimObject* tgt = orders->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP) {
Ship* tgt_ship = (Ship*) tgt;
if (CanTarget(tgt_ship)) {
roe = DIRECTED;
SelectTargetDirected((Ship*) tgt);
ship_ai->SetBracket(orders->Action() == RadioMessage::BRACKET);
ship_ai->SetIdentify(orders->Action() == RadioMessage::IDENTIFY);
ship_ai->SetNavPoint(0);
tgt_ok = true;
}
}
if (!tgt_ok)
ClearRadioOrders();
}
break;
case RadioMessage::ESCORT:
case RadioMessage::COVER_ME:
{
SimObject* tgt = orders->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP) {
roe = DEFENSIVE;
ship_ai->SetWard((Ship*) tgt);
ship_ai->SetNavPoint(0);
}
else {
ClearRadioOrders();
}
}
break;
case RadioMessage::WEP_FREE:
roe = AGRESSIVE;
ship_ai->DropTarget(0.1);
break;
case RadioMessage::WEP_HOLD:
case RadioMessage::FORM_UP:
roe = NONE;
ship_ai->DropTarget(5);
break;
case RadioMessage::MOVE_PATROL:
roe = SELF_DEFENSIVE;
ship_ai->SetPatrol(orders->Location());
ship_ai->SetNavPoint(0);
ship_ai->DropTarget(Random(5, 10));
break;
case RadioMessage::RTB:
case RadioMessage::DOCK_WITH:
roe = NONE;
ship_ai->DropTarget(10);
if (!ship->GetInbound()) {
RadioMessage* msg = 0;
Ship* controller = ship->GetController();
if (orders->Action() == RadioMessage::DOCK_WITH && orders->GetTarget()) {
controller = (Ship*) orders->GetTarget();
}
if (!controller) {
Element* elem = ship->GetElement();
if (elem && elem->GetCommander()) {
Element* cmdr = elem->GetCommander();
controller = cmdr->GetShip(1);
}
}
if (controller && controller->GetHangar() &&
controller->GetHangar()->CanStow(ship)) {
SimRegion* self_rgn = ship->GetRegion();
SimRegion* rtb_rgn = controller->GetRegion();
if (self_rgn == rtb_rgn) {
double range = Point(controller->Location() - ship->Location()).length();
if (range < 50e3) {
msg = new(__FILE__,__LINE__) RadioMessage(controller, ship, RadioMessage::CALL_INBOUND);
RadioTraffic::Transmit(msg);
}
}
}
else {
ship->ClearRadioOrders();
}
ship_ai->SetNavPoint(0);
}
break;
case RadioMessage::QUANTUM_TO:
case RadioMessage::FARCAST_TO:
roe = NONE;
ship_ai->DropTarget(10);
break;
}
action = orders->Action();
return true;
}
// if we had an action before, this must be a "cancel orders"
else if (action) {
ClearRadioOrders();
}
return false;
}
void
CameraDirector::ExecFrame(double seconds)
{
if (!ship)
return;
hud = HUDView::GetInstance();
int flight_phase = ship->GetFlightPhase();
if (flight_phase < Ship::LOCKED)
SetMode(MODE_DOCKING);
if (ship->IsAirborne()) {
if (flight_phase >= Ship::DOCKING)
SetMode(MODE_DOCKING);
}
else {
if (flight_phase >= Ship::RECOVERY)
SetMode(MODE_DOCKING);
}
if (flight_phase >= Ship::LOCKED && flight_phase < Ship::ACTIVE) {
int m = GetMode();
if (m != MODE_COCKPIT && m != MODE_VIRTUAL)
SetMode(MODE_COCKPIT);
}
if (ship->InTransition()) {
SetMode(MODE_DROP);
}
// automatically restore mode after transition:
else if (old_mode != MODE_NONE) {
mode = old_mode;
requested_mode = old_mode;
old_mode = MODE_NONE;
}
int op_mode = mode;
if (requested_mode > mode)
op_mode = requested_mode;
Starshatter* stars = Starshatter::GetInstance();
// if we are in padlock, and have not locked a ship
// try to padlock the current target:
if (op_mode == MODE_TARGET && !external_ship) {
SimObject* tgt = ship->GetTarget();
if (tgt && tgt->Type() == SimObject::SIM_SHIP)
SetViewObject((Ship*) tgt);
}
// if in an external mode, check the external ship:
else if (op_mode >= MODE_TARGET && op_mode <= MODE_ZOOM) {
if (external_ship && external_ship != ship && !stars->InCutscene()) {
Contact* c = ship->FindContact(external_ship);
if (!c || !c->ActLock()) {
SetViewObject(ship);
}
}
}
if (ship->Rep()) {
if (op_mode == MODE_COCKPIT) {
ship->HideRep();
ship->HideCockpit();
}
else if (op_mode == MODE_VIRTUAL || op_mode == MODE_TARGET) {
if (ship->Cockpit()) {
ship->HideRep();
ship->ShowCockpit();
}
else {
ship->ShowRep();
}
}
else {
ship->Rep()->SetForeground(op_mode == MODE_DOCKING);
ship->ShowRep();
ship->HideCockpit();
}
}
if (hud && hud->Ambient() != Color::Black)
sim->GetScene()->SetAmbient( hud->Ambient() );
else
sim->GetScene()->SetAmbient( sim->GetStarSystem()->Ambient() );
switch (op_mode) {
default:
case MODE_COCKPIT: Cockpit(seconds); break;
case MODE_CHASE: Chase(seconds); break;
case MODE_TARGET: Target(seconds); break;
case MODE_THREAT: Threat(seconds); break;
case MODE_VIRTUAL: Virtual(seconds); break;
case MODE_ORBIT:
case MODE_TRANSLATE:
case MODE_ZOOM: Orbit(seconds); break;
case MODE_DOCKING: Docking(seconds); break;
case MODE_DROP: Drop(seconds); break;
}
if (ship->Shake() > 0 &&
(op_mode < MODE_ORBIT ||
(op_mode == MODE_VIRTUAL && ship->Cockpit()))) {
Point vib = ship->Vibration() * 0.2;
camera.MoveBy(vib);
camera.Aim(0, vib.y, vib.z);
}
Transition(seconds);
DetailSet::SetReference(region, camera.Pos());
}
