void CCannon::FireImpl(const bool scriptCall)
{
float3 diff = currentTargetPos - weaponMuzzlePos;
float3 dir = (diff.SqLength() > 4.0f) ? GetWantedDir(diff) : diff; // prevent vertical aim when emit-sfx firing the weapon
dir += (gsRNG.NextVector() * SprayAngleExperience() + SalvoErrorExperience());
dir.SafeNormalize();
int ttl = 0;
const float sqSpeed2D = dir.SqLength2D() * projectileSpeed * projectileSpeed;
const int predict = math::ceil((sqSpeed2D == 0.0f) ?
(-2.0f * projectileSpeed * dir.y / gravity):
math::sqrt(diff.SqLength2D() / sqSpeed2D));
if (weaponDef->flighttime > 0) {
ttl = weaponDef->flighttime;
} else if (weaponDef->selfExplode) {
ttl = (predict + gsRNG.NextFloat() * 2.5f - 0.5f);
} else if ((weaponDef->groundBounce || weaponDef->waterBounce) && weaponDef->numBounce > 0) {
ttl = (predict * (1 + weaponDef->numBounce * weaponDef->bounceRebound));
} else {
ttl = predict * 2;
}
ProjectileParams params = GetProjectileParams();
params.pos = weaponMuzzlePos;
params.end = currentTargetPos;
params.speed = dir * projectileSpeed;
params.ttl = ttl;
params.gravity = gravity;
WeaponProjectileFactory::LoadProjectile(params);
}
void CMissileLauncher::FireImpl(bool scriptCall)
{
float3 dir = targetPos - weaponMuzzlePos;
const float dist = dir.LengthNormalize();
if (onlyForward) {
dir = owner->frontdir;
} else if (weaponDef->fixedLauncher) {
dir = weaponDir;
} else if (weaponDef->trajectoryHeight > 0.0f) {
dir.y += weaponDef->trajectoryHeight;
dir.Normalize();
}
dir += (gs->randVector() * SprayAngleExperience() + SalvoErrorExperience());
dir.Normalize();
float3 startSpeed = dir * weaponDef->startvelocity;
// NOTE: why only for SAMT units?
if (onlyForward && owner->unitDef->IsStrafingAirUnit())
startSpeed += owner->speed;
ProjectileParams params = GetProjectileParams();
params.pos = weaponMuzzlePos;
params.end = targetPos;
params.speed = startSpeed;
params.ttl = weaponDef->flighttime == 0? std::ceil(std::max(dist, range) / projectileSpeed + 25 * weaponDef->selfExplode): weaponDef->flighttime;
WeaponProjectileFactory::LoadProjectile(params);
}
void CDGunWeapon::FireImpl(const bool scriptCall)
{
float3 dir = wantedDir;
dir += (gsRNG.NextVector() * SprayAngleExperience() + SalvoErrorExperience());
dir.Normalize();
ProjectileParams params = GetProjectileParams();
params.pos = weaponMuzzlePos;
params.end = currentTargetPos;
params.speed = dir * projectileSpeed;
params.ttl = 1;
WeaponProjectileFactory::LoadProjectile(params);
}
void CStarburstLauncher::FireImpl(bool scriptCall)
{
const float3 speed = ((weaponDef->fixedLauncher)? weaponDir: UpVector) * weaponDef->startvelocity;
const float3 aimError = (gs->randVector() * SprayAngleExperience() + SalvoErrorExperience());
ProjectileParams params = GetProjectileParams();
params.pos = weaponMuzzlePos + UpVector * 2.0f;
params.end = targetPos;
params.speed = speed;
params.error = aimError;
params.ttl = 200; //???
params.tracking = tracking;
params.maxRange = (weaponDef->flighttime > 0 || weaponDef->fixedLauncher)? MAX_PROJECTILE_RANGE: range;
WeaponProjectileFactory::LoadProjectile(params);
}
void CFlameThrower::FireImpl(bool scriptCall)
{
float3 dir = targetPos - weaponMuzzlePos;
const float dist = dir.LengthNormalize();
const float3 spread =
(gs->randVector() * SprayAngleExperience() + SalvoErrorExperience()) -
(dir * 0.001f);
ProjectileParams params = GetProjectileParams();
params.pos = weaponMuzzlePos;
params.speed = dir * projectileSpeed;
params.spread = spread;
params.ttl = std::ceil(std::max(dist, range) / projectileSpeed * weaponDef->duration);
WeaponProjectileFactory::LoadProjectile(params);
}
bool CCannon::HaveFreeLineOfFire(const float3& pos, bool userTarget, const CUnit* unit) const
{
// assume we can still fire at partially submerged targets
if (!weaponDef->waterweapon && TargetUnitOrPositionUnderWater(pos, unit))
return false;
if (projectileSpeed == 0) {
return true;
}
float3 dif(pos - weaponMuzzlePos);
float3 dir(GetWantedDir2(dif));
if (dir.SqLength() == 0) {
return false;
}
float3 flatDir(dif.x, 0, dif.z);
float flatLength = flatDir.Length();
if (flatLength == 0) {
return true;
}
flatDir /= flatLength;
const float linear = dir.y;
const float quadratic = gravity / (projectileSpeed * projectileSpeed) * 0.5f;
const float groundDist = ((avoidFlags & Collision::NOGROUND) == 0)?
CGround::TrajectoryGroundCol(weaponMuzzlePos, flatDir, flatLength - 10, linear, quadratic):
-1.0f;
const float spread = (AccuracyExperience() + SprayAngleExperience()) * 0.6f * 0.9f;
if (groundDist > 0.0f) {
return false;
}
//FIXME add a forcedUserTarget (a forced fire mode enabled with meta key or something) and skip the test below then
if (TraceRay::TestTrajectoryCone(weaponMuzzlePos, flatDir, flatLength,
dir.y, quadratic, spread, owner->allyteam, avoidFlags, owner)) {
return false;
}
return true;
}
void CEmgCannon::FireImpl(const bool scriptCall)
{
float3 dir = currentTargetPos - weaponMuzzlePos;
const float dist = dir.LengthNormalize();
if (onlyForward && owner->unitDef->IsStrafingAirUnit()) {
// [?] StrafeAirMoveType cannot align itself properly, change back when that is fixed
dir = owner->frontdir;
}
dir += (gs->randVector() * SprayAngleExperience() + SalvoErrorExperience());
dir.Normalize();
ProjectileParams params = GetProjectileParams();
params.pos = weaponMuzzlePos;
params.speed = dir * projectileSpeed;
params.ttl = std::ceil(std::max(dist, range) / projectileSpeed);
WeaponProjectileFactory::LoadProjectile(params);
}
void CBeamLaser::FireInternal(float3 curDir)
{
float actualRange = range;
float rangeMod = 1.0f;
if (!owner->unitDef->IsImmobileUnit()) {
// help units fire while chasing
rangeMod = 1.3f;
}
if (owner->UnderFirstPersonControl()) {
rangeMod = 0.95f;
}
bool tryAgain = true;
bool doDamage = true;
float maxLength = range * rangeMod;
float curLength = 0.0f;
float3 curPos = weaponMuzzlePos;
float3 hitPos;
float3 newDir;
// objects at the end of the beam
CUnit* hitUnit = NULL;
CFeature* hitFeature = NULL;
CPlasmaRepulser* hitShield = NULL;
CollisionQuery hitColQuery;
if (!sweepFireState.IsSweepFiring()) {
curDir += (gs->randVector() * SprayAngleExperience());
curDir.SafeNormalize();
// increase range if targets are searched for in a cylinder
if (cylinderTargeting > 0.01f) {
const float verticalDist = owner->radius * cylinderTargeting * curDir.y;
const float maxLengthModSq = maxLength * maxLength + verticalDist * verticalDist;
maxLength = math::sqrt(maxLengthModSq);
}
// adjust range if targetting edge of hitsphere
if (targetType == Target_Unit && targetUnit != NULL && targetBorder != 0.0f) {
maxLength += (targetUnit->radius * targetBorder);
}
} else {
// restrict the range when sweeping
maxLength = std::min(maxLength, sweepFireState.GetTargetDist3D() * 1.125f);
}
for (int tries = 0; tries < 5 && tryAgain; ++tries) {
float beamLength = TraceRay::TraceRay(curPos, curDir, maxLength - curLength, collisionFlags, owner, hitUnit, hitFeature, &hitColQuery);
if (hitUnit != NULL && teamHandler->AlliedTeams(hitUnit->team, owner->team)) {
if (sweepFireState.IsSweepFiring() && !sweepFireState.DamageAllies()) {
doDamage = false; break;
}
}
if (!weaponDef->waterweapon) {
// terminate beam at water surface if necessary
if ((curDir.y < 0.0f) && ((curPos.y + curDir.y * beamLength) <= 0.0f)) {
beamLength = curPos.y / -curDir.y;
}
}
// if the beam gets intercepted, this modifies newDir
//
// we do more than one trace-iteration and set dir to
// newDir only in the case there is a shield in our way
const float shieldLength = interceptHandler.AddShieldInterceptableBeam(this, curPos, curDir, beamLength, newDir, hitShield);
if (shieldLength < beamLength) {
beamLength = shieldLength;
tryAgain = hitShield->BeamIntercepted(this, salvoDamageMult);
} else {
tryAgain = false;
}
// same as hitColQuery.GetHitPos() if no water or shield in way
hitPos = curPos + curDir * beamLength;
{
const float baseAlpha = weaponDef->intensity * 255.0f;
const float startAlpha = (1.0f - (curLength ) / maxLength);
const float endAlpha = (1.0f - (curLength + beamLength) / maxLength);
ProjectileParams pparams = GetProjectileParams();
pparams.pos = curPos;
pparams.end = hitPos;
pparams.ttl = weaponDef->beamLaserTTL;
pparams.startAlpha = Clamp(startAlpha * baseAlpha, 0.0f, 255.0f);
pparams.endAlpha = Clamp(endAlpha * baseAlpha, 0.0f, 255.0f);
WeaponProjectileFactory::LoadProjectile(pparams);
}
curPos = hitPos;
curDir = newDir;
curLength += beamLength;
}
if (!doDamage)
return;
if (hitUnit != NULL) {
hitUnit->SetLastAttackedPiece(hitColQuery.GetHitPiece(), gs->frameNum);
if (targetBorder > 0.0f) {
actualRange += (hitUnit->radius * targetBorder);
}
}
if (curLength < maxLength) {
const DamageArray& baseDamages = (weaponDef->dynDamageExp <= 0.0f)?
weaponDef->damages:
weaponDefHandler->DynamicDamages(
weaponDef->damages,
weaponMuzzlePos,
curPos,
(weaponDef->dynDamageRange > 0.0f)?
weaponDef->dynDamageRange:
weaponDef->range,
weaponDef->dynDamageExp,
weaponDef->dynDamageMin,
weaponDef->dynDamageInverted
);
// make it possible to always hit with some minimal intensity (melee weapons have use for that)
const float hitIntensity = std::max(minIntensity, 1.0f - curLength / (actualRange * 2.0f));
const DamageArray damages = baseDamages * (hitIntensity * salvoDamageMult);
const CGameHelper::ExplosionParams params = {
hitPos,
curDir,
damages,
weaponDef,
owner,
hitUnit,
hitFeature,
craterAreaOfEffect,
damageAreaOfEffect,
weaponDef->edgeEffectiveness,
weaponDef->explosionSpeed,
1.0f, // gfxMod
weaponDef->impactOnly,
weaponDef->noExplode || weaponDef->noSelfDamage, // ignoreOwner
true, // damageGround
-1u // projectileID
};
helper->Explosion(params);
}
}
void CLightningCannon::FireImpl(bool scriptCall)
{
float3 curPos = weaponMuzzlePos;
float3 curDir = (targetPos - curPos).Normalize();
float3 newDir = curDir;
curDir +=
(gs->randVector() * SprayAngleExperience() + SalvoErrorExperience());
curDir.Normalize();
CUnit* hitUnit = NULL;
CFeature* hitFeature = NULL;
CPlasmaRepulser* hitShield = NULL;
CollisionQuery hitColQuery;
float boltLength = TraceRay::TraceRay(curPos, curDir, range, collisionFlags, owner, hitUnit, hitFeature, &hitColQuery);
if (!weaponDef->waterweapon) {
// terminate bolt at water surface if necessary
if ((curDir.y < 0.0f) && ((curPos.y + curDir.y * boltLength) <= 0.0f)) {
boltLength = curPos.y / -curDir.y;
}
}
const float shieldLength = interceptHandler.AddShieldInterceptableBeam(this, curPos, curDir, range, newDir, hitShield);
if (shieldLength < boltLength) {
boltLength = shieldLength;
hitShield->BeamIntercepted(this);
}
if (hitUnit != NULL) {
hitUnit->SetLastAttackedPiece(hitColQuery.GetHitPiece(), gs->frameNum);
}
const DamageArray& damageArray = (weaponDef->dynDamageExp <= 0.0f)?
weaponDef->damages:
weaponDefHandler->DynamicDamages(
weaponDef->damages,
weaponMuzzlePos,
targetPos,
(weaponDef->dynDamageRange > 0.0f)?
weaponDef->dynDamageRange:
weaponDef->range,
weaponDef->dynDamageExp,
weaponDef->dynDamageMin,
weaponDef->dynDamageInverted
);
const CGameHelper::ExplosionParams params = {
curPos + curDir * boltLength, // hitPos (same as hitColQuery.GetHitPos() if no water or shield in way)
curDir,
damageArray,
weaponDef,
owner,
hitUnit,
hitFeature,
craterAreaOfEffect,
damageAreaOfEffect,
weaponDef->edgeEffectiveness,
weaponDef->explosionSpeed,
0.5f, // gfxMod
weaponDef->impactOnly,
weaponDef->noExplode || weaponDef->noSelfDamage, // ignoreOwner
false, // damageGround
-1u // projectileID
};
helper->Explosion(params);
ProjectileParams pparams = GetProjectileParams();
pparams.pos = curPos;
pparams.end = curPos + curDir * (boltLength + 10.0f);
pparams.ttl = 10;
WeaponProjectileFactory::LoadProjectile(pparams);
}
void CLightningCannon::FireImpl(const bool scriptCall)
{
float3 curPos = weaponMuzzlePos;
float3 curDir = (currentTargetPos - weaponMuzzlePos).SafeNormalize();
curDir +=
(gs->randVector() * SprayAngleExperience() + SalvoErrorExperience());
curDir.Normalize();
CUnit* hitUnit = NULL;
CFeature* hitFeature = NULL;
CollisionQuery hitColQuery;
float boltLength = TraceRay::TraceRay(curPos, curDir, range, collisionFlags, owner, hitUnit, hitFeature, &hitColQuery);
if (!weaponDef->waterweapon) {
// terminate bolt at water surface if necessary
if ((curDir.y < 0.0f) && ((curPos.y + curDir.y * boltLength) <= 0.0f)) {
boltLength = curPos.y / -curDir.y;
hitUnit = NULL;
hitFeature = NULL;
}
}
static std::vector<TraceRay::SShieldDist> hitShields;
hitShields.clear();
TraceRay::TraceRayShields(this, curPos, curDir, range, hitShields);
for (const TraceRay::SShieldDist& sd: hitShields) {
if(sd.dist < boltLength && sd.rep->IncomingBeam(this, curPos)) {
boltLength = sd.dist;
hitUnit = NULL;
hitFeature = NULL;
break;
}
}
if (hitUnit != NULL) {
hitUnit->SetLastHitPiece(hitColQuery.GetHitPiece(), gs->frameNum);
}
const DamageArray& damageArray = damages->GetDynamicDamages(weaponMuzzlePos, currentTargetPos);
const CGameHelper::ExplosionParams params = {
curPos + curDir * boltLength, // hitPos (same as hitColQuery.GetHitPos() if no water or shield in way)
curDir,
damageArray,
weaponDef,
owner,
hitUnit,
hitFeature,
damages->craterAreaOfEffect,
damages->damageAreaOfEffect,
damages->edgeEffectiveness,
damages->explosionSpeed,
0.5f, // gfxMod
weaponDef->impactOnly,
weaponDef->noExplode || weaponDef->noSelfDamage, // ignoreOwner
false, // damageGround
-1u // projectileID
};
helper->Explosion(params);
ProjectileParams pparams = GetProjectileParams();
pparams.pos = curPos;
pparams.end = curPos + curDir * (boltLength + 10.0f);
pparams.ttl = weaponDef->beamLaserTTL;
WeaponProjectileFactory::LoadProjectile(pparams);
}