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#ifndef SHURIKENMODULE_H
#define SHURIKENMODULE_H
#include "../ParticleSystemCommon.h"
#include "../ParticleSystemCurves.h"
#include "Runtime/Math/Matrix4x4.h"
#include "Runtime/Geometry/AABB.h"
#include "Runtime/Utilities/dynamic_array.h"
#define ENABLE_MULTITHREADED_PARTICLES ENABLE_MULTITHREADED_CODE
#define DECLARE_MODULE(name) const char* GetName () { return #name; } DEFINE_GET_TYPESTRING(name)
class ParticleSystem;
class Plane;
struct ParticleSystemEmissionState
{
ParticleSystemEmissionState() { Clear(); }
inline void Clear()
{
m_ToEmitAccumulator = 0.0f;
m_ParticleSpacing = 0.0f;
}
float m_ParticleSpacing;
float m_ToEmitAccumulator;
};
struct ParticleSystemEmissionData
{
enum { kMaxNumBursts = 4 };
int type;
MinMaxCurve rate;
float burstTime[kMaxNumBursts];
UInt16 burstParticleCount[kMaxNumBursts];
UInt8 burstCount;
};
struct ParticleSystemSubEmitterData
{
ParticleSystemSubEmitterData()
:maxLifetime(0.0f)
,startDelayInSec(0.0f)
,lengthInSec(0.0f)
{}
ParticleSystemEmissionData emissionData;
float maxLifetime;
float startDelayInSec;
float lengthInSec;
ParticleSystem* emitter;
};
// @TODO: Find "pretty" place for shared structs and enums?
struct ParticleSystemEmitReplay
{
float t;
float aliveTime;
float emissionOffset;
float emissionGap;
int particlesToEmit;
size_t numContinuous;
UInt32 randomSeed;
ParticleSystemEmitReplay (float inT, int inParticlesToEmit, float inEmissionOffset, float inEmissionGap, size_t inNumContinuous, UInt32 inRandomSeed)
: t (inT), particlesToEmit (inParticlesToEmit), aliveTime(0.0F), emissionOffset(inEmissionOffset), emissionGap(inEmissionGap), numContinuous(inNumContinuous), randomSeed(inRandomSeed)
{}
};
struct SubEmitterEmitCommand
{
SubEmitterEmitCommand(ParticleSystemEmissionState inEmissionState, Vector3f inPosition, Vector3f inVelocity, ParticleSystemSubType inSubEmitterType, int inSubEmitterIndex, int inParticlesToEmit, int inParticlesToEmitContinuous, float inParentT, float inDeltaTime)
:emissionState(inEmissionState)
,position(inPosition)
,velocity(inVelocity)
,subEmitterType(inSubEmitterType)
,subEmitterIndex(inSubEmitterIndex)
,particlesToEmit(inParticlesToEmit)
,particlesToEmitContinuous(inParticlesToEmitContinuous)
,deltaTime(inDeltaTime)
,parentT(inParentT)
,timeAlive(0.0f)
{
}
ParticleSystemEmissionState emissionState;
Vector3f position;
Vector3f velocity;
ParticleSystemSubType subEmitterType;
int subEmitterIndex;
int particlesToEmit;
int particlesToEmitContinuous;
float deltaTime;
float parentT; // Used for StartModules
float timeAlive;
};
struct ParticleSystemSubEmitCmdBuffer
{
ParticleSystemSubEmitCmdBuffer()
:commands(0)
,commandCount(0)
,maxCommandCount(0)
{}
inline void AddCommand(const ParticleSystemEmissionState& emissionState, const Vector3f& initialPosition, const Vector3f& initialVelocity, const ParticleSystemSubType type, const int index, const int particlesToEmit, const int particlesToEmitContinuous, const float parentT, const float dt)
{
commands[commandCount++] = SubEmitterEmitCommand(emissionState, initialPosition, initialVelocity, type, index, particlesToEmit, particlesToEmitContinuous, parentT, dt);
}
inline bool IsFull() { return commandCount >= maxCommandCount; }
SubEmitterEmitCommand* commands;
int commandCount;
int maxCommandCount; // Mostly to assert/test against trashing memory
};
struct ParticleSystemExternalCachedForce
{
Vector3f position;
Vector3f direction;
int forceType;
float radius;
float forceMain;
float forceTurbulence; // not yet implemented
};
// @TODO: Maybe there's a better name for this? ParticleSystemSerializedState? Some shit like that :)
struct ParticleSystemReadOnlyState
{
ParticleSystemReadOnlyState();
void CheckConsistency();
float lengthInSec;
float startDelay;
float speed;
UInt32 randomSeed;
bool looping;
bool prewarm;
bool playOnAwake;
bool useLocalSpace;
template<class TransferFunction>
void Transfer (TransferFunction& transfer);
};
// Some of these aren't actually state, but more like context. Separate it?
struct ParticleSystemState
{
// state
float accumulatedDt;
float delayT;
bool playing;
bool needRestart;
bool stopEmitting;
size_t rayBudget;
size_t nextParticleToTrace;
bool GetIsSubEmitter() const { return isSubEmitter; }
private:
// When setting this we need to ensure some other things happen as well
bool isSubEmitter;
public:
bool recordSubEmits;
// Procedural mode / culling
bool supportsProcedural; // With the current parameter set, does the emitter support procedural mode?
bool invalidateProcedural; // This is set if anything changes from script at some point when running a system
bool culled; // Is particle system currently culled?
double cullTime; // Absolute time, so we need as double in case it runs for ages
int numLoops; // Number of loops executed
// per-frame
Matrix4x4f localToWorld;
Matrix4x4f worldToLocal;
Vector3f emitterVelocity;
Vector3f emitterScale;
MinMaxAABB minMaxAABB;
float maxSize; // Maximum size of particles due to setting from script
float t;
// Temp alloc stuff
ParticleSystemSubEmitterData* cachedSubDataBirth;
size_t numCachedSubDataBirth;
ParticleSystemSubEmitterData* cachedSubDataCollision;
size_t numCachedSubDataCollision;
ParticleSystemSubEmitterData* cachedSubDataDeath;
size_t numCachedSubDataDeath;
ParticleSystemExternalCachedForce* cachedForces;
size_t numCachedForces;
Plane* cachedCollisionPlanes;
size_t numCachedCollisionPlanes;
ParticleSystemSubEmitCmdBuffer subEmitterCommandBuffer;
dynamic_array<ParticleSystemEmitReplay> emitReplay;
ParticleSystemEmissionState emissionState;
ParticleSystemState ();
void Tick (const ParticleSystemReadOnlyState& constState, float dt);
void ClearSubEmitterCommandBuffer();
void SetIsSubEmitter(bool inIsSubEmitter)
{
if(inIsSubEmitter)
{
stopEmitting = true;
invalidateProcedural = true;
}
isSubEmitter = inIsSubEmitter;
}
template<class TransferFunction>
void Transfer (TransferFunction& transfer);
};
class ParticleSystemModule
{
public:
DECLARE_SERIALIZE (ParticleSystemModule)
ParticleSystemModule (bool enabled) : m_Enabled (enabled) {}
virtual ~ParticleSystemModule () {}
inline bool GetEnabled() const { return m_Enabled; }
inline void SetEnabled(bool enabled) { m_Enabled = enabled; }
private:
// shared data
bool m_Enabled;
};
#endif // SHURIKENMODULE_H
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