/**
* Force the bounding box to be updated.
*/
void FParticleBeam2EmitterInstance::ForceUpdateBoundingBox()
{
if (Component)
{
float MaxSizeScale = 1.0f;
ParticleBoundingBox.Init();
ParticleBoundingBox += Component->GetComponentLocation();
FVector NoiseMin(0.0f);
FVector NoiseMax(0.0f);
// Noise points have to be taken into account...
if (BeamModule_Noise)
{
BeamModule_Noise->GetNoiseRange(NoiseMin, NoiseMax);
}
// Take scale into account as well
FVector Scale = Component->ComponentToWorld.GetScale3D();
// Take each particle into account
for (int32 i=0; i<ActiveParticles; i++)
{
DECLARE_PARTICLE_PTR(Particle, ParticleData + ParticleStride * ParticleIndices[i]);
int32 CurrentOffset = TypeDataOffset;
FBeam2TypeDataPayload* BeamData = NULL;
FVector* InterpolatedPoints = NULL;
float* NoiseRate = NULL;
float* NoiseDelta = NULL;
FVector* TargetNoisePoints = NULL;
FVector* NextNoisePoints = NULL;
float* TaperValues = NULL;
float* NoiseDistanceScale = NULL;
FBeamParticleModifierPayloadData* SourceModifier = NULL;
FBeamParticleModifierPayloadData* TargetModifier = NULL;
BeamTypeData->GetDataPointers(this, (const uint8*)Particle, CurrentOffset,
BeamData, InterpolatedPoints, NoiseRate, NoiseDelta, TargetNoisePoints,
NextNoisePoints, TaperValues, NoiseDistanceScale,
SourceModifier, TargetModifier);
FVector Size = Particle->Size * Scale;
ParticleBoundingBox += Particle->Location;
ParticleBoundingBox += Particle->Location + NoiseMin;
ParticleBoundingBox += Particle->Location + NoiseMax;
ParticleBoundingBox += BeamData->SourcePoint;
ParticleBoundingBox += BeamData->SourcePoint + NoiseMin;
ParticleBoundingBox += BeamData->SourcePoint + NoiseMax;
ParticleBoundingBox += BeamData->TargetPoint;
ParticleBoundingBox += BeamData->TargetPoint + NoiseMin;
ParticleBoundingBox += BeamData->TargetPoint + NoiseMax;
MaxSizeScale = FMath::Max(MaxSizeScale, Size.GetAbsMax()); //@todo particles: this does a whole lot of compares that can be avoided using SSE/ Altivec.
}
ParticleBoundingBox = ParticleBoundingBox.ExpandBy(MaxSizeScale);
}
}
/**
* Update the bounding box for the emitter
*
* @param DeltaTime The time slice to use
*/
void FParticleBeam2EmitterInstance::UpdateBoundingBox(float DeltaTime)
{
SCOPE_CYCLE_COUNTER(STAT_ParticleUpdateBounds);
if (Component)
{
bool bUpdateBox = ((Component->bWarmingUp == false) &&
(Component->Template != NULL) && (Component->Template->bUseFixedRelativeBoundingBox == false));
float MaxSizeScale = 1.0f;
if (bUpdateBox)
{
ParticleBoundingBox.Init();
//@todo. Currently, we don't support UseLocalSpace for beams
//if (Template->UseLocalSpace == false)
{
ParticleBoundingBox += Component->GetComponentLocation();
}
}
FVector NoiseMin(0.0f);
FVector NoiseMax(0.0f);
// Noise points have to be taken into account...
if (BeamModule_Noise)
{
BeamModule_Noise->GetNoiseRange(NoiseMin, NoiseMax);
}
// Take scale into account as well
FVector Scale = Component->ComponentToWorld.GetScale3D();
// Take each particle into account
for (int32 i=0; i<ActiveParticles; i++)
{
DECLARE_PARTICLE_PTR(Particle, ParticleData + ParticleStride * ParticleIndices[i]);
int32 CurrentOffset = TypeDataOffset;
FBeam2TypeDataPayload* BeamData = NULL;
FVector* InterpolatedPoints = NULL;
float* NoiseRate = NULL;
float* NoiseDelta = NULL;
FVector* TargetNoisePoints = NULL;
FVector* NextNoisePoints = NULL;
float* TaperValues = NULL;
float* NoiseDistanceScale = NULL;
FBeamParticleModifierPayloadData* SourceModifier = NULL;
FBeamParticleModifierPayloadData* TargetModifier = NULL;
BeamTypeData->GetDataPointers(this, (const uint8*)Particle, CurrentOffset,
BeamData, InterpolatedPoints, NoiseRate, NoiseDelta, TargetNoisePoints,
NextNoisePoints, TaperValues, NoiseDistanceScale,
SourceModifier, TargetModifier);
// Do linear integrator and update bounding box
Particle->OldLocation = Particle->Location;
Particle->Location += DeltaTime * Particle->Velocity;
Particle->Rotation += DeltaTime * Particle->RotationRate;
Particle->OldLocation += PositionOffsetThisTick;
FVector Size = Particle->Size * Scale;
if (bUpdateBox)
{
ParticleBoundingBox += Particle->Location;
ParticleBoundingBox += Particle->Location + NoiseMin;
ParticleBoundingBox += Particle->Location + NoiseMax;
ParticleBoundingBox += BeamData->SourcePoint;
ParticleBoundingBox += BeamData->SourcePoint + NoiseMin;
ParticleBoundingBox += BeamData->SourcePoint + NoiseMax;
ParticleBoundingBox += BeamData->TargetPoint;
ParticleBoundingBox += BeamData->TargetPoint + NoiseMin;
ParticleBoundingBox += BeamData->TargetPoint + NoiseMax;
}
// Do angular integrator, and wrap result to within +/- 2 PI
Particle->Rotation = FMath::Fmod(Particle->Rotation, 2.f*(float)PI);
MaxSizeScale = FMath::Max(MaxSizeScale, Size.GetAbsMax()); //@todo particles: this does a whole lot of compares that can be avoided using SSE/ Altivec.
}
if (bUpdateBox)
{
ParticleBoundingBox = ParticleBoundingBox.ExpandBy(MaxSizeScale);
}
}
}
