OgreShaderExTriplanarTexturing.h

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/*
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This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org

Copyright (c) 2000-2014 Torus Knot Software Ltd
Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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*/
#ifndef _ShaderExTriplanarTexturing_
#define _ShaderExTriplanarTexturing_

#include "OgreShaderPrerequisites.h"
#ifdef RTSHADER_SYSTEM_BUILD_EXT_SHADERS
#include "OgreShaderSubRenderState.h"
#include "OgreShaderParameter.h"

#define SGX_FUNC_TRIPLANAR_TEXTURING "SGX_TriplanarTexturing"

namespace Ogre {
namespace RTShader {

class _OgreRTSSExport TriplanarTexturing : public SubRenderState
{

protected:
    
    Vector3 mParameters;
    
    UniformParameterPtr mPSTPParams;
    
    ParameterPtr mVSInNormal;
    
    ParameterPtr mVSOutNormal;

    ParameterPtr mPSInNormal;
    
    ParameterPtr mVSInPosition;
    
    ParameterPtr mVSOutPosition;

    ParameterPtr mPSInPosition;

    UniformParameterPtr mSamplerFromX;

    UniformParameterPtr mSamplerFromY;

    UniformParameterPtr mSamplerFromZ;
    
    ParameterPtr mPSInDiffuse;

    ParameterPtr mPSOutDiffuse;

    String mTextureNameFromX;
    
    ushort mTextureSamplerIndexFromX;

    String mTextureNameFromY;
    
    ushort mTextureSamplerIndexFromY;
    
    String mTextureNameFromZ;
    
    ushort mTextureSamplerIndexFromZ;

    virtual bool resolveParameters(ProgramSet* programSet);

    virtual bool resolveDependencies(ProgramSet* programSet);

    virtual bool addFunctionInvocations(ProgramSet* programSet);

public:
    
    static String type;

    virtual void setParameters(const Vector3 &parameters);

    virtual void setTextureNames(const String &textureNameFromX, const String &textureNameFromY, const String &textureNameFromZ);
    
    virtual const String& getType() const;

    virtual int getExecutionOrder() const;

    virtual bool preAddToRenderState (const RenderState* renderState, Pass* srcPass, Pass* dstPass);

    virtual void copyFrom(const SubRenderState& rhs);
    
    virtual void updateGpuProgramsParams(Renderable* rend, Pass* pass, const AutoParamDataSource* source, const LightList* pLightList);

};


class _OgreRTSSExport TriplanarTexturingFactory : public SubRenderStateFactory
{
public:

    virtual const String& getType() const;

    virtual SubRenderState* createInstance(ScriptCompiler* compiler, PropertyAbstractNode* prop, Pass* pass, SGScriptTranslator* translator);

protected:

    virtual SubRenderState* createInstanceImpl();



};

}
}

#endif
#endif