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#include "UnityPrefix.h"
#include "ParticleAnimator.h"
#include "Runtime/Math/Random/Random.h"
#include "Runtime/Input/TimeManager.h"
#include "ParticleStruct.h"
#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
#include "Runtime/GameCode/DestroyDelayed.h"
#include "Runtime/BaseClasses/IsPlaying.h"
#include "Runtime/Graphics/Transform.h"
#include "Runtime/Core/Callbacks/GlobalCallbacks.h"
static Rand gParticleAnimRand (2);
void ParticleAnimator::GetColorAnimation(ColorRGBAf *col) const
{
for(int i=0;i<kColorKeys;i++)
col[i] = m_ColorAnimation[i];
}
void ParticleAnimator::SetColorAnimation(ColorRGBAf *col)
{
for(int i=0;i<kColorKeys;i++)
m_ColorAnimation[i] = col[i];
}
void ParticleAnimator::UpdateAnimator( ParticleArray& particles, PrivateParticleInfo& privateInfo, float deltaTime )
{
// Quit updating if no new emissions and no old particles
if( particles.empty() )
{
m_EnergylossFraction = 0.0F;
if( WillAutoDestructIfNoParticles( privateInfo ) )
DestroyObjectDelayed (GetGameObjectPtr());
return;
}
if( m_Autodestruct == 1 )
m_Autodestruct = 2;
if( !m_StopSimulation )
{
privateInfo.aabb.Init ();
UpdateParticles( particles, privateInfo, deltaTime );
//Particle size is multipled to calculate the maximum size
//Handle cases where grow size is negative also
float endSize = privateInfo.maxEmitterParticleSize * pow (1.0F + m_SizeGrow, privateInfo.maxEnergy);
privateInfo.maxParticleSize = m_SizeGrow < 0.0f ? privateInfo.maxEmitterParticleSize : endSize;
}
}
bool ParticleAnimator::WillAutoDestructIfNoParticles( const PrivateParticleInfo& privateInfo ) const
{
// Autodestruct destroys the GO if enabled AND either of those:
// * Particles have been emitted, but are all dead now.
// * Emit was once On, but now is Off.
if( m_Autodestruct != 0 && IsWorldPlaying() )
{
if( m_Autodestruct == 2 || (privateInfo.hadEverEmitOn && !privateInfo.isEmitOn) )
return true;
}
return false;
}
void ParticleAnimator::UpdateParticles (ParticleArray& particles, PrivateParticleInfo& privateInfo, float deltaTime) const
{
Vector3f dtForce = m_Force * deltaTime;
Vector3f rotationAxis;
if (privateInfo.useWorldSpace)
rotationAxis = (m_WorldRotationAxis + GetComponent(Transform).TransformDirection(m_LocalRotationAxis)) * deltaTime;
else
rotationAxis = (GetComponent(Transform).InverseTransformDirection(m_WorldRotationAxis) + m_LocalRotationAxis) * deltaTime;
float damping = pow (m_Damping, deltaTime);
Vector3f rndForce = m_RndForce * deltaTime;
const float kColorScale = kColorKeys - 1.0f;
// The color keys are inverted
ColorRGBA32 colorAnimation[kColorKeys] = { m_ColorAnimation[4], m_ColorAnimation[3], m_ColorAnimation[2], m_ColorAnimation[1], m_ColorAnimation[0] };
float sizeScale = pow (1.0F + m_SizeGrow, deltaTime);
float maxColorAnimationT = (float)kColorKeys - 1.0F - Vector3f::epsilon;
bool doesAnimateColor = m_DoesAnimateColor;
int particleSize = particles.size ();
int i = 0;
while (i < particleSize)
{
Particle& p = particles[i];
// Update Alpha
p.energy -= deltaTime;
if (p.energy <= 0.0f) {
// Kill particle (replace particle i with last, and continue updating the moved particle)
KillParticle (particles, i);
--particleSize;
continue;
}
if( doesAnimateColor )
{
// [0..kColorKeys-1] for [0..maxEnergy]
float t = p.energy * kColorScale / p.startEnergy;
t = FloatMin (t, maxColorAnimationT);
int baseColor = FloorfToIntPos (t);
DebugAssertIf( baseColor < 0 || baseColor >= kColorKeys - 1 );
float frac = t - (float)baseColor;
int intFrac = RoundfToIntPos (frac * 255.0F);
p.color = Lerp (colorAnimation[baseColor], colorAnimation[baseColor + 1], intFrac);
}
// Update Velocity
p.velocity *= damping;
p.velocity += dtForce;
p.velocity += RandomPointInsideCube (gParticleAnimRand, rndForce);
p.velocity += Cross (rotationAxis, p.velocity);
// Update position
p.position += p.velocity * deltaTime;
// Update Size
p.size *= sizeScale;
// Update Bounding Box
privateInfo.aabb.Encapsulate (p.position);
p.rotation += p.angularVelocity * deltaTime;
Prefetch(&particles[i] + 8);
Prefetch(&particles[particleSize-1]);
i++;
}
}
ParticleAnimator::ParticleAnimator(MemLabelId label, ObjectCreationMode mode)
: Super(label, mode)
{
m_ColorAnimation[0] = ColorRGBA32 (255, 255, 255, 10);
m_ColorAnimation[1] = ColorRGBA32 (255, 255, 255, 180);
m_ColorAnimation[2] = ColorRGBA32 (255, 255, 255, 255);
m_ColorAnimation[3] = ColorRGBA32 (255, 255, 255, 180);
m_ColorAnimation[4] = ColorRGBA32 (255, 255, 255, 10);
m_WorldRotationAxis = Vector3f::zero;
m_LocalRotationAxis = Vector3f::zero;
m_DoesAnimateColor = true;
m_RndForce = Vector3f::zero;
m_Force = Vector3f::zero;
m_SizeGrow = 0.0f;
m_Damping = 1.0f;
m_Autodestruct = 0;
m_StopSimulation = false;
m_EnergylossFraction = 0.0F;
}
ParticleAnimator::~ParticleAnimator ()
{
}
IMPLEMENT_CLASS_HAS_INIT (ParticleAnimator)
IMPLEMENT_OBJECT_SERIALIZE (ParticleAnimator)
static void ResetRandSeed ()
{
gParticleAnimRand.SetSeed (2);
}
void ParticleAnimator::InitializeClass ()
{
GlobalCallbacks::Get().resetRandomAfterLevelLoad.Register(ResetRandSeed);
}
void ParticleAnimator::CleanupClass ()
{
GlobalCallbacks::Get().resetRandomAfterLevelLoad.Unregister(ResetRandSeed);
}
template<class TransferFunction> inline
void ParticleAnimator::Transfer (TransferFunction& transfer)
{
Super::Transfer (transfer);
transfer.Transfer (m_DoesAnimateColor, "Does Animate Color?");
transfer.Align();
transfer.Transfer( m_ColorAnimation[0], "colorAnimation[0]", kSimpleEditorMask );
transfer.Transfer( m_ColorAnimation[1], "colorAnimation[1]", kSimpleEditorMask );
transfer.Transfer( m_ColorAnimation[2], "colorAnimation[2]", kSimpleEditorMask );
transfer.Transfer( m_ColorAnimation[3], "colorAnimation[3]", kSimpleEditorMask );
transfer.Transfer( m_ColorAnimation[4], "colorAnimation[4]", kSimpleEditorMask );
DebugAssertIf (kColorKeys != 5);
transfer.Transfer( m_WorldRotationAxis, "worldRotationAxis" );
transfer.Transfer( m_LocalRotationAxis, "localRotationAxis" );
transfer.Transfer( m_SizeGrow, "sizeGrow", kSimpleEditorMask );
transfer.Transfer( m_RndForce, "rndForce", kSimpleEditorMask );
transfer.Transfer( m_Force, "force", kSimpleEditorMask );
transfer.Transfer( m_Damping, "damping", kSimpleEditorMask ); m_Damping = clamp<float> (m_Damping, 0.0f, 1.0f);
transfer.Transfer( m_StopSimulation, "stopSimulation", kHideInEditorMask );
bool autodestruct = m_Autodestruct;
transfer.Transfer (autodestruct, "autodestruct");
if (transfer.IsReading ())
{
if (autodestruct == 0)
m_Autodestruct = 0;
else if (m_Autodestruct == 0)
m_Autodestruct = 1;
}
}
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