/**
* @brief Causes this CMobileCAI to execute the attack order c
*/
void CMobileCAI::ExecuteAttack(Command &c)
{
assert(owner->unitDef->canAttack);
// limit how far away we fly
if (tempOrder && (owner->moveState < 2) && orderTarget
&& LinePointDist(ClosestPointOnLine(commandPos1, commandPos2, owner->pos),
commandPos2, orderTarget->pos)
> (500 * owner->moveState + owner->maxRange)) {
StopMove();
FinishCommand();
return;
}
// check if we are in direct command of attacker
if (!inCommand) {
// don't start counting until the owner->AttackGround() order is given
owner->commandShotCount = -1;
if (c.params.size() == 1) {
CUnit* targetUnit = uh->GetUnit(c.params[0]);
// check if we have valid target parameter and that we aren't attacking ourselves
if (targetUnit != NULL && targetUnit != owner) {
float3 fix = targetUnit->pos + owner->posErrorVector * 128;
float3 diff = float3(fix - owner->pos).Normalize();
SetGoal(fix - diff * targetUnit->radius, owner->pos);
orderTarget = targetUnit;
AddDeathDependence(orderTarget);
inCommand = true;
} else {
// unit may not fire on itself, cancel order
StopMove();
FinishCommand();
return;
}
}
else if (c.params.size() >= 3) {
// user gave force-fire attack command
float3 pos(c.params[0], c.params[1], c.params[2]);
SetGoal(pos, owner->pos);
inCommand = true;
}
}
else if ((c.params.size() == 3) && (owner->commandShotCount > 0) && (commandQue.size() > 1)) {
// the trailing CMD_SET_WANTED_MAX_SPEED in a command pair does not count
if ((commandQue.size() > 2) || (commandQue.back().id != CMD_SET_WANTED_MAX_SPEED)) {
StopMove();
FinishCommand();
return;
}
}
// if our target is dead or we lost it then stop attacking
// NOTE: unit should actually just continue to target area!
if (targetDied || (c.params.size() == 1 && UpdateTargetLostTimer(int(c.params[0])) == 0)) {
// cancel keeppointingto
StopMove();
FinishCommand();
return;
}
// user clicked on enemy unit (note that we handle aircrafts slightly differently)
if (orderTarget) {
//bool b1 = owner->AttackUnit(orderTarget, c.id == CMD_DGUN);
bool b2 = false;
bool b3 = false;
bool b4 = false;
float edgeFactor = 0.f; // percent offset to target center
float3 diff = owner->pos - orderTarget->midPos;
if (owner->weapons.size() > 0) {
if (!(c.options & ALT_KEY) && SkipParalyzeTarget(orderTarget)) {
StopMove();
FinishCommand();
return;
}
CWeapon* w = owner->weapons.front();
// if we have at least one weapon then check if we
// can hit target with our first (meanest) one
b2 = w->TryTargetRotate(orderTarget, c.id == CMD_DGUN);
b3 = Square(w->range - (w->relWeaponPos).Length())
> (orderTarget->pos.SqDistance(owner->pos));
b4 = w->TryTargetHeading(GetHeadingFromVector(-diff.x, -diff.z),
orderTarget->pos, orderTarget != NULL, orderTarget);
edgeFactor = fabs(w->targetBorder);
}
float diffLength2d = diff.Length2D();
// if w->AttackUnit() returned true then we are already
// in range with our biggest weapon so stop moving
// also make sure that we're not locked in close-in/in-range state loop
// due to rotates invoked by in-range or out-of-range states
if (b2) {
if (!(tempOrder && owner->moveState == 0)
&& (diffLength2d * 1.4f > owner->maxRange
- orderTarget->speed.SqLength()
/ owner->unitDef->maxAcc)
&& b4 && diff.dot(orderTarget->speed) < 0)
{
SetGoal(owner->pos + (orderTarget->speed * 80), owner->pos,
SQUARE_SIZE, orderTarget->speed.Length() * 1.1f);
} else {
StopMove();
// FIXME kill magic frame number
if (gs->frameNum > lastCloseInTry + MAX_CLOSE_IN_RETRY_TICKS) {
owner->moveType->KeepPointingTo(orderTarget->midPos,
std::min((float) owner->losRadius * loshandler->losDiv,
owner->maxRange * 0.9f), true);
}
}
owner->AttackUnit(orderTarget, c.id == CMD_DGUN);
}
// if we're on hold pos in a temporary order, then none of the close-in
// code below should run, and the attack command is cancelled.
else if (tempOrder && owner->moveState == 0) {
StopMove();
FinishCommand();
return;
}
// if ((our movetype has type TAAirMoveType and length of 2D vector from us to target
// less than 90% of our maximum range) OR squared length of 2D vector from us to target
// less than 1024) then we are close enough
else if(diffLength2d < (owner->maxRange * 0.9f)){
if (dynamic_cast<CTAAirMoveType*>(owner->moveType)
|| (diff.SqLength2D() < 1024))
{
StopMove();
owner->moveType->KeepPointingTo(orderTarget->midPos,
std::min((float) owner->losRadius * loshandler->losDiv,
owner->maxRange * 0.9f), true);
}
// if (((first weapon range minus first weapon length greater than distance to target)
// and length of 2D vector from us to target less than 90% of our maximum range)
// then we are close enough, but need to move sideways to get a shot.
//assumption is flawed: The unit may be aiming or otherwise unable to shoot
else if (owner->unitDef->strafeToAttack && b3 && diffLength2d < (owner->maxRange * 0.9f))
{
moveDir ^= (owner->moveType->progressState == AMoveType::Failed);
float sin = moveDir ? 3.0/5 : -3.0/5;
float cos = 4.0/5;
float3 goalDiff(0, 0, 0);
goalDiff.x = diff.dot(float3(cos, 0, -sin));
goalDiff.z = diff.dot(float3(sin, 0, cos));
goalDiff *= (diffLength2d < (owner->maxRange * 0.3f)) ? 1/cos : cos;
goalDiff += orderTarget->pos;
SetGoal(goalDiff, owner->pos);
}
}
// if 2D distance of (target position plus attacker error vector times 128)
// to goal position greater than
// (10 plus 20% of 2D distance between attacker and target) then we need to close
// in on target more
else if ((orderTarget->pos + owner->posErrorVector * 128).SqDistance2D(goalPos)
> Square(10 + orderTarget->pos.distance2D(owner->pos) * 0.2f)) {
// if the target isn't in LOS, go to its approximate position
// otherwise try to go precisely to the target
// this should fix issues with low range weapons (mainly melee)
float3 fix = orderTarget->pos +
(orderTarget->losStatus[owner->allyteam] & LOS_INLOS ?
float3(0.f,0.f,0.f) :
owner->posErrorVector * 128);
float3 norm = float3(fix - owner->pos).Normalize();
float3 goal = fix - norm*(orderTarget->radius*edgeFactor*0.8f);
SetGoal(goal, owner->pos);
if (lastCloseInTry < gs->frameNum + MAX_CLOSE_IN_RETRY_TICKS)
lastCloseInTry = gs->frameNum;
}
}
// user is attacking ground
else if (c.params.size() >= 3) {
const float3 pos(c.params[0], c.params[1], c.params[2]);
const float3 diff = owner->pos - pos;
if (owner->weapons.size() > 0) {
// if we have at least one weapon then check if
// we can hit position with our first (assumed
// to be meanest) one
CWeapon* w = owner->weapons.front();
// XXX hack - dgun overrides any checks
if (c.id == CMD_DGUN) {
float rr = owner->maxRange * owner->maxRange;
for (vector<CWeapon*>::iterator it = owner->weapons.begin();
it != owner->weapons.end(); ++it) {
if (dynamic_cast<CDGunWeapon*>(*it))
rr = (*it)->range * (*it)->range;
}
if (diff.SqLength() < rr) {
StopMove();
owner->AttackGround(pos, c.id == CMD_DGUN);
owner->moveType->KeepPointingTo(pos, owner->maxRange * 0.9f, true);
}
} else {
const bool inAngle = w->TryTargetRotate(pos, c.id == CMD_DGUN);
const bool inRange = diff.SqLength2D() < Square(w->range - (w->relWeaponPos).Length2D());
if (inAngle || inRange) {
StopMove();
owner->AttackGround(pos, c.id == CMD_DGUN);
owner->moveType->KeepPointingTo(pos, owner->maxRange * 0.9f, true);
}
}
}
else if (diff.SqLength2D() < 1024) {
StopMove();
owner->moveType->KeepPointingTo(pos, owner->maxRange * 0.9f, true);
}
// if we are more than 10 units distant from target position then keeping moving closer
else if (pos.SqDistance2D(goalPos) > 100) {
SetGoal(pos, owner->pos);
}
}
}
void CMobileCAI::ExecuteAttack(Command &c)
{
assert(owner->unitDef->canAttack);
// limit how far away we fly based on our movestate
if (tempOrder && orderTarget) {
const float3& closestPos = ClosestPointOnLine(commandPos1, commandPos2, owner->pos);
const float curTargetDist = LinePointDist(closestPos, commandPos2, orderTarget->pos);
const float maxTargetDist = (500 * owner->moveState + owner->maxRange);
if (owner->moveState < MOVESTATE_ROAM && curTargetDist > maxTargetDist) {
StopMove();
FinishCommand();
return;
}
}
// check if we are in direct command of attacker
if (!inCommand) {
if (c.params.size() == 1) {
CUnit* targetUnit = unitHandler->GetUnit(c.params[0]);
// check if we have valid target parameter and that we aren't attacking ourselves
if (targetUnit == NULL) { StopMove(); FinishCommand(); return; }
if (targetUnit == owner) { StopMove(); FinishCommand(); return; }
if (targetUnit->GetTransporter() != NULL && !modInfo.targetableTransportedUnits) {
StopMove(); FinishCommand(); return;
}
const float3 tgtErrPos = targetUnit->pos + owner->posErrorVector * 128;
const float3 tgtPosDir = (tgtErrPos - owner->pos).Normalize();
SetGoal(tgtErrPos - tgtPosDir * targetUnit->radius, owner->pos);
SetOrderTarget(targetUnit);
owner->AttackUnit(targetUnit, (c.options & INTERNAL_ORDER) == 0, c.GetID() == CMD_MANUALFIRE);
inCommand = true;
}
else if (c.params.size() >= 3) {
// user gave force-fire attack command
SetGoal(c.GetPos(0), owner->pos);
inCommand = true;
}
}
// if our target is dead or we lost it then stop attacking
// NOTE: unit should actually just continue to target area!
if (targetDied || (c.params.size() == 1 && UpdateTargetLostTimer(int(c.params[0])) == 0)) {
// cancel keeppointingto
StopMove();
FinishCommand();
return;
}
// user clicked on enemy unit (note that we handle aircrafts slightly differently)
if (orderTarget != NULL) {
bool tryTargetRotate = false;
bool tryTargetHeading = false;
float edgeFactor = 0.0f; // percent offset to target center
const float3 targetMidPosVec = owner->midPos - orderTarget->midPos;
const float targetGoalDist = (orderTarget->pos + owner->posErrorVector * 128.0f).SqDistance2D(goalPos);
const float targetPosDist = Square(10.0f + orderTarget->pos.distance2D(owner->pos) * 0.2f);
const float minPointingDist = std::min(1.0f * owner->losRadius * loshandler->losDiv, owner->maxRange * 0.9f);
// FIXME? targetMidPosMaxDist is 3D, but compared with a 2D value
const float targetMidPosDist2D = targetMidPosVec.Length2D();
//const float targetMidPosMaxDist = owner->maxRange - (orderTarget->speed.SqLength() / owner->unitDef->maxAcc);
if (!owner->weapons.empty()) {
if (!(c.options & ALT_KEY) && SkipParalyzeTarget(orderTarget)) {
StopMove();
FinishCommand();
return;
}
}
for (unsigned int wNum = 0; wNum < owner->weapons.size(); wNum++) {
CWeapon* w = owner->weapons[wNum];
if (c.GetID() == CMD_MANUALFIRE) {
assert(owner->unitDef->canManualFire);
if (!w->weaponDef->manualfire) {
continue;
}
}
tryTargetRotate = w->TryTargetRotate(orderTarget, (c.options & INTERNAL_ORDER) == 0);
tryTargetHeading = w->TryTargetHeading(GetHeadingFromVector(-targetMidPosVec.x, -targetMidPosVec.z), orderTarget->pos, orderTarget != NULL, orderTarget);
if (tryTargetRotate || tryTargetHeading)
break;
edgeFactor = math::fabs(w->targetBorder);
}
// if w->AttackUnit() returned true then we are already
// in range with our biggest (?) weapon, so stop moving
// also make sure that we're not locked in close-in/in-range state loop
// due to rotates invoked by in-range or out-of-range states
if (tryTargetRotate) {
const bool canChaseTarget = (!tempOrder || owner->moveState != MOVESTATE_HOLDPOS);
const bool targetBehind = (targetMidPosVec.dot(orderTarget->speed) < 0.0f);
if (canChaseTarget && tryTargetHeading && targetBehind) {
SetGoal(owner->pos + (orderTarget->speed * 80), owner->pos, SQUARE_SIZE, orderTarget->speed.Length() * 1.1f);
} else {
StopMove();
if (gs->frameNum > lastCloseInTry + MAX_CLOSE_IN_RETRY_TICKS) {
owner->moveType->KeepPointingTo(orderTarget->midPos, minPointingDist, true);
}
}
owner->AttackUnit(orderTarget, (c.options & INTERNAL_ORDER) == 0, c.GetID() == CMD_MANUALFIRE);
}
// if we're on hold pos in a temporary order, then none of the close-in
// code below should run, and the attack command is cancelled.
else if (tempOrder && owner->moveState == MOVESTATE_HOLDPOS) {
StopMove();
FinishCommand();
return;
}
// if ((our movetype has type HoverAirMoveType and length of 2D vector from us to target
// less than 90% of our maximum range) OR squared length of 2D vector from us to target
// less than 1024) then we are close enough
else if (targetMidPosDist2D < (owner->maxRange * 0.9f)) {
if (dynamic_cast<CHoverAirMoveType*>(owner->moveType) != NULL || (targetMidPosVec.SqLength2D() < 1024)) {
StopMove();
owner->moveType->KeepPointingTo(orderTarget->midPos, minPointingDist, true);
}
// if (((first weapon range minus first weapon length greater than distance to target)
// and length of 2D vector from us to target less than 90% of our maximum range)
// then we are close enough, but need to move sideways to get a shot.
//assumption is flawed: The unit may be aiming or otherwise unable to shoot
else if (owner->unitDef->strafeToAttack && targetMidPosDist2D < (owner->maxRange * 0.9f)) {
moveDir ^= (owner->moveType->progressState == AMoveType::Failed);
const float sin = moveDir ? 3.0/5 : -3.0/5;
const float cos = 4.0 / 5;
float3 goalDiff;
goalDiff.x = targetMidPosVec.dot(float3(cos, 0, -sin));
goalDiff.z = targetMidPosVec.dot(float3(sin, 0, cos));
goalDiff *= (targetMidPosDist2D < (owner->maxRange * 0.3f)) ? 1/cos : cos;
goalDiff += orderTarget->pos;
SetGoal(goalDiff, owner->pos);
}
}
// if 2D distance of (target position plus attacker error vector times 128)
// to goal position greater than
// (10 plus 20% of 2D distance between attacker and target) then we need to close
// in on target more
else if (targetGoalDist > targetPosDist) {
// if the target isn't in LOS, go to its approximate position
// otherwise try to go precisely to the target
// this should fix issues with low range weapons (mainly melee)
const float3 errPos = ((orderTarget->losStatus[owner->allyteam] & LOS_INLOS)? ZeroVector: owner->posErrorVector * 128.0f);
const float3 tgtPos = orderTarget->pos + errPos;
const float3 norm = (tgtPos - owner->pos).Normalize();
const float3 goal = tgtPos - norm * (orderTarget->radius * edgeFactor * 0.8f);
SetGoal(goal, owner->pos);
if (lastCloseInTry < gs->frameNum + MAX_CLOSE_IN_RETRY_TICKS)
lastCloseInTry = gs->frameNum;
}
}
// user wants to attack the ground; cycle through our
// weapons until we find one that can accomodate him
else if (c.params.size() >= 3) {
const float3 attackPos = c.GetPos(0);
const float3 attackVec = attackPos - owner->pos;
bool foundWeapon = false;
for (unsigned int wNum = 0; wNum < owner->weapons.size(); wNum++) {
CWeapon* w = owner->weapons[wNum];
if (foundWeapon)
break;
// XXX HACK - special weapon overrides any checks
if (c.GetID() == CMD_MANUALFIRE) {
assert(owner->unitDef->canManualFire);
if (!w->weaponDef->manualfire)
continue;
if (attackVec.SqLength() >= (w->range * w->range))
continue;
StopMove();
owner->AttackGround(attackPos, (c.options & INTERNAL_ORDER) == 0, c.GetID() == CMD_MANUALFIRE);
owner->moveType->KeepPointingTo(attackPos, owner->maxRange * 0.9f, true);
foundWeapon = true;
} else {
// NOTE:
// we call TryTargetHeading which is less restrictive than TryTarget
// (eg. the former succeeds even if the unit has not already aligned
// itself with <attackVec>)
if (w->TryTargetHeading(GetHeadingFromVector(attackVec.x, attackVec.z), attackPos, (c.options & INTERNAL_ORDER) == 0, NULL)) {
if (w->TryTargetRotate(attackPos, (c.options & INTERNAL_ORDER) == 0)) {
StopMove();
owner->AttackGround(attackPos, (c.options & INTERNAL_ORDER) == 0, c.GetID() == CMD_MANUALFIRE);
foundWeapon = true;
}
// for gunships, this pitches the nose down such that
// TryTargetRotate (which also checks range for itself)
// has a bigger chance of succeeding
//
// hence it must be called as soon as we get in range
// and may not depend on what TryTargetRotate returns
// (otherwise we might never get a firing solution)
owner->moveType->KeepPointingTo(attackPos, owner->maxRange * 0.9f, true);
}
}
}
#if 0
// no weapons --> no need to stop at an arbitrary distance?
else if (diff.SqLength2D() < 1024) {
StopMove();
owner->moveType->KeepPointingTo(attackPos, owner->maxRange * 0.9f, true);
}
#endif
// if we are unarmed and more than 10 elmos distant
// from target position, then keeping moving closer
if (owner->weapons.empty() && attackPos.SqDistance2D(goalPos) > 100) {
SetGoal(attackPos, owner->pos);
}
}
