CWE-ou-minkata/Sources/Plasma/PubUtilLib/plDrawable/plDynaDecal.h

/*==LICENSE==*

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

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*==LICENSE==*/

#ifndef plDynaDecal_inc
#define plDynaDecal_inc

#include "hsGeometry3.h"

class plAuxSpan;

class plDynaDecalBin;

class plDecalVtxFormat
{
public:
    hsPoint3    fPos;
    hsVector3   fNorm;
    uint32_t      fDiffuse;
    uint32_t      fSpecular; // Not used anywhere, carried around everywhere.
    hsPoint3    fUVW[2];
};

// UVW[0] is the currently used UVW.
// UVW[1] is for the alpha hack (when necessary).
const uint8_t kDecalVtxFormat = 0x2; // Two UVW's, otherwise vanilla.


class plDynaDecal
{
public:
    enum
    {
        kFresh          = 0x1,
        kAttenColor     = 0x2,
        kVertexShader   = 0x4
    };
protected:

    // StartVtx and StartIdx are relative to the start of the data
    // owned by this decal's span, not relative to the start of the
    // underlying buffers.
    uint16_t      fStartVtx;
    uint16_t      fNumVerts;

    uint16_t      fStartIdx;
    uint16_t      fNumIdx;

    double      fBirth;
    float       fInitAtten;
    uint32_t    fFlags;

    plDecalVtxFormat*   fVtxBase; // Safe pointer, the buffer data will outlive this decal
    
    plAuxSpan*          fAuxSpan;

    friend class plDynaDecalMgr;
public:
    virtual ~plDynaDecal() { }

    virtual bool        Age(double t, float ramp, float decay, float life) = 0;
};

// No expansion
class plDynaSplot : public plDynaDecal
{
protected:

public:

    virtual bool        Age(double t, float ramp, float decay, float life);
};

// Expands radially from center
class plDynaRipple : public plDynaDecal
{
public:

    virtual bool        Age(double t, float ramp, float decay, float life);

    float fC1U;
    float fC2U;

    float fC1V;
    float fC2V;

};

// Expands in V from top (V=0), expands in U from center (U=0.5)
class plDynaWake : public plDynaDecal
{
public:

    virtual bool        Age(double t, float ramp, float decay, float life);

    float fC1U;
    float fC2U;

    float fC1V;
    float fC2V;

};

// Scrolls in V, no change in U
class plDynaWave : public plDynaDecal
{
public:

    virtual bool        Age(double t, float ramp, float decay, float life);

    float fScrollRate;
};

// About the same as a DynaRipple, but implemented with vertex/pixel shaders.
// Only useful with plWaveSet.
class plDynaRippleVS : public plDynaRipple
{
public:

    virtual bool        Age(double t, float ramp, float decay, float life);
};

#endif // plDynaDecal_inc