1 files changed, 116 insertions, 0 deletions
diff --git a/Runtime/Graphics/ParticleSystem/ParticleSystemParticle.h b/Runtime/Graphics/ParticleSystem/ParticleSystemParticle.h
new file mode 100644
index 0000000..65d6894
--- /dev/null
+++ b/Runtime/Graphics/ParticleSystem/ParticleSystemParticle.h
@@ -0,0 +1,116 @@
+#ifndef SHURIKENPARTICLE_H
+#define SHURIKENPARTICLE_H
+
+#include "Runtime/Graphics/ParticleSystem/ParticleCollisionEvents.h"
+#include "Runtime/Math/Color.h"
+#include "Runtime/Math/Vector3.h"
+#include "Runtime/Utilities/dynamic_array.h"
+
+class Collider;
+// Keep in sync with struct ParticleSystem.Particle
+enum{ kParticleSystemMaxNumEmitAccumulators = 2 };
+
+// TODO: Optimization:
+// . Store startLifetime as 1.0f/startLifeTime and store lifetime as 1.0f - lifetime.
+//   This means that a lot of fdivs turn into muls and mads turns into nothing (NormalizedTime will become cheaper).
+//   Remember: script must still convert into legacy format.
+
+// Keep in sync with struct ParticleSystem.Particle
+struct ParticleSystemParticle
+{
+	Vector3f		position;
+	Vector3f		velocity;
+	Vector3f		animatedVelocity;
+	Vector3f		axisOfRotation;
+	float			rotation;
+	float			rotationalSpeed;
+	float			size;
+	ColorRGBA32		color;
+	UInt32			randomSeed;
+	float			lifetime;
+	float			startLifetime;
+	float			emitAccumulator[kParticleSystemMaxNumEmitAccumulators];
+};
+
+typedef dynamic_array<Vector3f> ParticleSystemVector3Array;
+typedef dynamic_array<float> ParticleSystemFloatArray;
+typedef dynamic_array<ColorRGBA32> ParticleSystemColor32Array;
+typedef dynamic_array<UInt32> ParticleSystemUInt32Array;
+
+// Keep in sync with struct ParticleSystem.Particle
+struct ParticleSystemParticles
+{	
+	ParticleSystemParticles()
+	:numEmitAccumulators(0)
+	,usesAxisOfRotation(false)
+	,usesRotationalSpeed(false)
+	,usesCollisionEvents(false)
+	,currentCollisionEventThreadArray(0)
+	{}
+
+	ParticleSystemVector3Array position;
+	ParticleSystemVector3Array velocity;
+	ParticleSystemVector3Array animatedVelocity; // Would actually only need this when modules with force and velocity curves are used
+	ParticleSystemVector3Array axisOfRotation;
+	ParticleSystemFloatArray rotation;
+	ParticleSystemFloatArray rotationalSpeed;
+	ParticleSystemFloatArray size;
+	ParticleSystemColor32Array color;
+	ParticleSystemUInt32Array randomSeed;
+	ParticleSystemFloatArray lifetime;
+	ParticleSystemFloatArray startLifetime;
+	ParticleSystemFloatArray emitAccumulator[kParticleSystemMaxNumEmitAccumulators]; // Usage: Only needed if particle system has time sub emitter
+	CollisionEvents collisionEvents;
+
+	bool usesAxisOfRotation;
+	bool usesRotationalSpeed;
+	bool usesCollisionEvents;
+	int currentCollisionEventThreadArray;
+	int numEmitAccumulators;
+
+	void AddParticle(ParticleSystemParticle* particle);
+
+	void SetUsesAxisOfRotation ();
+	void SetUsesRotationalSpeed();
+	
+	void											SetUsesCollisionEvents(bool usesCollisionEvents);
+	bool											GetUsesCollisionEvents() const;
+	void											SetUsesEmitAccumulator (int numAccumulators);
+
+	static size_t GetParticleSize();
+
+	size_t array_size () const;	
+	void array_resize (size_t i);
+	void element_swap(size_t i, size_t j);
+	void element_assign(size_t i, size_t j);
+	void array_assign_external(void* data, const int numParticles);
+	void array_merge_preallocated(const ParticleSystemParticles& rhs, const int offset, const bool needAxisOfRotation, const bool needEmitAccumulator);
+	void array_assign(const ParticleSystemParticles& rhs);
+	static void array_lerp(ParticleSystemParticles& output, const ParticleSystemParticles& a, const ParticleSystemParticles& b, float factor);
+
+	void CopyFromArrayAOS(ParticleSystemParticle* particles, int size);
+	void CopyToArrayAOS(ParticleSystemParticle* particles, int size);
+};
+
+struct ParticleSystemParticlesTempData
+{
+	ParticleSystemParticlesTempData();
+	void element_swap(size_t i, size_t j);
+
+	ColorRGBA32* color;
+	float* size;
+	float* sheetIndex;
+	size_t particleCount;
+};
+
+inline float NormalizedTime (const ParticleSystemParticles& ps, size_t i)
+{
+	return (ps.startLifetime[i] - ps.lifetime[i]) / ps.startLifetime[i];
+}
+
+inline float NormalizedTime (float wholeTime, float currentTime)
+{
+	return (wholeTime - currentTime) / wholeTime;
+}
+
+#endif // SHURIKENPARTICLE_H