CWE-ou-minkata/Sources/Plasma/PubUtilLib/plSurface/plGrassShaderMod.h

/*==LICENSE==*

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*==LICENSE==*/
#ifndef PLGRASSSHADERMOD_INC
#define PLGRASSSHADERMOD_INC

#include "pnModifier/plModifier.h"

class plSceneObject;
class hsGMaterial;
class plShader;

class plGrassWave
{
public:
    plGrassWave() : fDistX(0.F), fDistY(0.F), fDistZ(0.F), fDirX(0.F), fDirY(0.F), fSpeed(0.F) {}

    float fDistX;
    float fDistY;
    float fDistZ;
    float fDirX;
    float fDirY;
    float fSpeed;

    void Write(hsStream *s);
    void Read(hsStream *s);
};

class plGrassShaderMod : public plModifier
{
public:
    plGrassShaderMod() : fTarget(nil), fMaterial(nil), fVShader(nil), fPShader(nil) {}
    ~plGrassShaderMod();

    void ResetWaves();
    void RefreshWaves();

    virtual int GetNumTargets() const { return fTarget ? 1 : 0; }
    virtual plSceneObject* GetTarget(int w) const { return fTarget; }
    virtual void AddTarget(plSceneObject *object);
    virtual void RemoveTarget(plSceneObject *object);

    virtual hsBool MsgReceive(plMessage *msg);

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

    CLASSNAME_REGISTER( plGrassShaderMod );
    GETINTERFACE_ANY( plGrassShaderMod, plModifier );

    enum {
        kRefGrassVS,
        kRefGrassPS,
        kRefMaterial,
    };

    enum {
        kNumWaves = 4,
    };

    plGrassWave fWaves[kNumWaves];

protected:
    virtual hsBool IEval(double secs, float del, uint32_t dirty);
    virtual void IApplyDynamic() {};    // dummy function required by base class
    void ISetupShaders();
    void IRefreshWaves(plShader *vShader);

    plSceneObject *fTarget;
    hsGMaterial *fMaterial;
    plShader *fVShader;
    plShader *fPShader;
};

namespace plGrassVS
{
    enum {
        kLocalToNDC     = 0,
        kNumericConsts  = 4,
        kAppConsts      = 5,
        kPiConsts       = 6,
        kSinConsts      = 7,
        kWaveDistX      = 8,
        kWaveDistY      = 9,
        kWaveDistZ      = 10,
        kWaveDirX       = 11,
        kWaveDirY       = 12,
        kWaveSpeed      = 13,

        kNumConsts      = 14,
    };
};

#endif // PLGRASSSHADERMOD