CWE-ou-minkata/Sources/Plasma/PubUtilLib/plParticleSystem/plParticleEffect.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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it under the terms of the GNU General Public License as published by
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*==LICENSE==*/
#ifndef plParticleEffect_inc
#define plParticleEffect_inc

#include "pnKeyedObject/hsKeyedObject.h"
#include "hsMatrix44.h"

class plEffectTargetInfo;
class plConvexVolume;
class hsResMgr;
class plSceneObject;

class plParticleEffect : public hsKeyedObject
{
public:
    CLASSNAME_REGISTER( plParticleEffect );
    GETINTERFACE_ANY( plParticleEffect, hsKeyedObject );

    // Order is:
    //  PrepareEffect is called with a given target (including valid
    //      ParticleContext).
    //  ApplyEffect is called some once for each particle (maybe zero times). 
    //      It can return true to kill a particle. 
    //      Target and Context passed in with Prepare will be
    //      guaranteed to remain valid until,
    //  EndEffect marks no more particles will be processed with the above
    //      context (invalidating anything cached).
    // Defaults for Prepare and End are no-ops.
    virtual void PrepareEffect(const plEffectTargetInfo& target) {}
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i) = 0;
    virtual void EndEffect(const plEffectTargetInfo& target) {}
};

class plParticleCollisionEffect : public plParticleEffect
{
public:
    plParticleCollisionEffect();
    ~plParticleCollisionEffect();

    CLASSNAME_REGISTER( plParticleCollisionEffect );
    GETINTERFACE_ANY( plParticleCollisionEffect, plParticleEffect );

    virtual void PrepareEffect(const plEffectTargetInfo& target);

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);
    virtual bool MsgReceive(plMessage *msg);

protected:
    plSceneObject *fSceneObj;
    plConvexVolume *fBounds;
};

// Default particle blocker. Doesn't affect particle's velocity,
// so it'll keep "beat"ing on the deflector until the velocity
// dotted with the deflector normal slides it off an edge.
class plParticleCollisionEffectBeat : public plParticleCollisionEffect
{
public:
    plParticleCollisionEffectBeat();

    CLASSNAME_REGISTER( plParticleCollisionEffectBeat );
    GETINTERFACE_ANY( plParticleCollisionEffectBeat, plParticleCollisionEffect );

    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);
};

// This particle blocker just kills any particles that hit it.
class plParticleCollisionEffectDie : public plParticleCollisionEffect
{
public:
    plParticleCollisionEffectDie();

    CLASSNAME_REGISTER( plParticleCollisionEffectDie );
    GETINTERFACE_ANY( plParticleCollisionEffectDie, plParticleCollisionEffect );

    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);
};

class plParticleCollisionEffectBounce : public plParticleCollisionEffect
{
protected:
    float    fBounce;
    float    fFriction;
public:
    plParticleCollisionEffectBounce();

    CLASSNAME_REGISTER( plParticleCollisionEffectBounce );
    GETINTERFACE_ANY( plParticleCollisionEffectBounce, plParticleCollisionEffect );

    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);

    void SetBounce(float b) { fBounce = b; }
    float GetBounce() const { return fBounce; }

    void SetFriction(float f) { fFriction = f; }
    float GetFriction() const { return fFriction; }
};

class plParticleFadeVolumeEffect : public plParticleEffect
{
protected:
    // Some cached properties. These will be the same for all
    // particles between matching PrepareEffect and EndEffect calls.
    hsPoint3    fMax;
    hsPoint3    fMin;
    hsPoint3    fNorm;

public:
    plParticleFadeVolumeEffect();
    ~plParticleFadeVolumeEffect();

    CLASSNAME_REGISTER( plParticleFadeVolumeEffect );
    GETINTERFACE_ANY( plParticleFadeVolumeEffect, plParticleEffect );

    virtual void PrepareEffect(const plEffectTargetInfo& target);
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);
    //virtual bool MsgReceive(plMessage *msg);

    float fLength;
    bool fIgnoreZ;
};

class plParticleWindEffect : public plParticleEffect
{
protected:
    // The properties that define the wind. These might/should be animatable.
    float    fStrength;
    float    fConstancy;
    float    fSwirl;
    bool        fHorizontal;
    hsVector3   fRefDir;

    // Some cached properties. These will be the same for all
    // particles between matching PrepareEffect and EndEffect calls.
    // These define the current state of the wind.
    hsVector3   fWindVec;
    hsVector3   fRandDir;
    hsVector3   fDir;
    double      fLastDirSecs;
public:

    plParticleWindEffect();
    ~plParticleWindEffect();

    CLASSNAME_REGISTER( plParticleWindEffect );
    GETINTERFACE_ANY( plParticleWindEffect, plParticleEffect );

    virtual void PrepareEffect(const plEffectTargetInfo& target);
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i) = 0;

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);

    void                SetStrength(float v) { fStrength = v; }
    float            GetStrength() const { return fStrength; }

    void                SetConstancy(float c) { fConstancy = c; }
    float            GetConstancy() const { return fConstancy; }

    void                SetSwirl(float s) { fSwirl = s; }
    float            GetSwirl() const { return fSwirl; }

    void                SetHorizontal(bool on) { fHorizontal = on; }
    bool                GetHorizontal() const { return fHorizontal; }

    void                SetRefDirection(const hsVector3& v);
    const hsVector3&    GetRefDirection() const { return fRefDir; }
};

class plParticleLocalWind : public plParticleWindEffect
{
protected:
    hsVector3   fScale;
    float    fSpeed;

    hsVector3   fPhase;
    hsVector3   fInvScale;
    double      fLastPhaseSecs;
    
public:
    plParticleLocalWind();
    ~plParticleLocalWind();

    CLASSNAME_REGISTER( plParticleLocalWind );
    GETINTERFACE_ANY( plParticleLocalWind, plParticleWindEffect );

    virtual void PrepareEffect(const plEffectTargetInfo& target);
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);

    void                SetScale(const hsVector3& v) { fScale = v; }
    const hsVector3&    GetScale() const { return fScale; }

    void                SetSpeed(float v) { fSpeed = v; }
    float            GetSpeed() const { return fSpeed; }

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);

};

class plParticleUniformWind : public plParticleWindEffect
{
protected:

    float    fFreqMin;
    float    fFreqMax;
    float    fFreqCurr;
    float    fFreqRate;
    double      fCurrPhase;

    double      fLastFreqSecs;

    float    fCurrentStrength;
public:
    plParticleUniformWind();
    ~plParticleUniformWind();

    CLASSNAME_REGISTER( plParticleUniformWind );
    GETINTERFACE_ANY( plParticleUniformWind, plParticleWindEffect );

    virtual void PrepareEffect(const plEffectTargetInfo& target);
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);

    void        SetFrequencyRange(float minSecsPerCycle, float maxSecsPerCycle);
    void        SetFrequencyRate(float secsPerCycle);

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);

};

class plParticleInfluenceInfo
{
public:
    hsVector3 fAvgVel;
    hsVector3 fRepDir;
};

class plParticleFlockEffect : public plParticleEffect
{
//protected:
protected:
    hsPoint3 fTargetOffset;     // Worldspace offset from our target to get the true goal
    hsPoint3 fDissenterTarget;  // Where to particles go when they get scared and leave us?
    float fInfAvgRadSq;      // Square of the radius of influence for average velocity matching.
    float fInfRepRadSq;      // Same, for repelling from neighbors.
    float fAvgVelStr;        // How strongly are we influenced by average dir?
    float fRepDirStr;        // Same for repelling
    float fGoalOrbitStr;     // Same for the goal (when we're within the desired distance)
    float fGoalChaseStr;     // Same for the goal (when we're too far away, and chasing it)
    float fGoalDistSq;
    float fFullChaseDistSq;
    float fMaxOrbitSpeed;
    float fMaxChaseSpeed;

    uint16_t fMaxParticles;
    float *fDistSq;          // Table of distances from particle to particle
    plParticleInfluenceInfo *fInfluences; 

    void IUpdateDistances(const plEffectTargetInfo &target);
    void IUpdateInfluences(const plEffectTargetInfo &target);

public:
    plParticleFlockEffect();
    ~plParticleFlockEffect();

    CLASSNAME_REGISTER( plParticleFlockEffect );
    GETINTERFACE_ANY( plParticleFlockEffect, plParticleEffect );

    virtual void PrepareEffect(const plEffectTargetInfo& target);
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);  

    void SetTargetOffset(const hsPoint3 &offset) { fTargetOffset = offset; }
    void SetDissenterTarget(const hsPoint3 &target) { fDissenterTarget = target; }
    void SetInfluenceAvgRadius(float val) { fInfAvgRadSq = val * val; }
    void SetInfluenceRepelRadius(float val) { fInfRepRadSq = val * val; }
    void SetGoalRadius(float val) { fGoalDistSq = val * val; }
    void SetFullChaseRadius(float val) { fFullChaseDistSq = val * val; }
    void SetConformStr(float val) { fAvgVelStr = val; }
    void SetRepelStr(float val) { fRepDirStr = val; }
    void SetGoalOrbitStr(float val) { fGoalOrbitStr = val; }
    void SetGoalChaseStr(float val) { fGoalChaseStr = val; }
    void SetMaxOrbitSpeed(float val) { fMaxOrbitSpeed = val; }
    void SetMaxChaseSpeed(float val) { fMaxChaseSpeed = val; }
    void SetMaxParticles(uint16_t num);

    virtual void Read(hsStream *s, hsResMgr *mgr);
    virtual void Write(hsStream *s, hsResMgr *mgr);
    virtual bool MsgReceive(plMessage *msg);  
};  

class plParticleFollowSystemEffect : public plParticleEffect
{
public:
    CLASSNAME_REGISTER( plParticleFollowSystemEffect );
    GETINTERFACE_ANY( plParticleFollowSystemEffect, plParticleEffect );
    
    plParticleFollowSystemEffect();

    virtual void PrepareEffect(const plEffectTargetInfo& target);
    virtual bool ApplyEffect(const plEffectTargetInfo& target, int32_t i);
    virtual void EndEffect(const plEffectTargetInfo& target);
    
protected:
    hsMatrix44 fOldW2L;
    bool fEvalThisFrame;
};

#endif