OgreShaderExPerPixelLighting.h
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    00001 /*
    00002 -----------------------------------------------------------------------------
    00003 This source file is part of OGRE
    00004 (Object-oriented Graphics Rendering Engine)
    00005 For the latest info, see http://www.ogre3d.org
    00006
    00007 Copyright (c) 2000-2012 Torus Knot Software Ltd
    00008 Permission is hereby granted, free of charge, to any person obtaining a copy
    00009 of this software and associated documentation files (the "Software"), to deal
    00010 in the Software without restriction, including without limitation the rights
    00011 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    00012 copies of the Software, and to permit persons to whom the Software is
    00013 furnished to do so, subject to the following conditions:
    00014
    00015 The above copyright notice and this permission notice shall be included in
    00016 all copies or substantial portions of the Software.
    00017
    00018 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    00019 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00020 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    00021 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00022 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    00023 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    00024 THE SOFTWARE.
    00025 -----------------------------------------------------------------------------
    00026 */
    00027 #ifndef _ShaderExPerPixelLighting_
    00028 #define _ShaderExPerPixelLighting_
    00029
    00030 #include "OgreShaderPrerequisites.h"
    00031 #ifdef RTSHADER_SYSTEM_BUILD_EXT_SHADERS
    00032 #include "OgreShaderParameter.h"
    00033 #include "OgreShaderSubRenderState.h"
    00034 #include "OgreVector4.h"
    00035 #include "OgreLight.h"
    00036 #include "OgreCommon.h"
    00037
    00038 namespace Ogre {
    00039 namespace RTShader {
    00040
    00048 #define SGX_LIB_PERPIXELLIGHTING                    "SGXLib_PerPixelLighting"
    00049 #define SGX_FUNC_TRANSFORMNORMAL                    "SGX_TransformNormal"
    00050 #define SGX_FUNC_TRANSFORMPOSITION                  "SGX_TransformPosition"
    00051 #define SGX_FUNC_LIGHT_DIRECTIONAL_DIFFUSE          "SGX_Light_Directional_Diffuse"
    00052 #define SGX_FUNC_LIGHT_DIRECTIONAL_DIFFUSESPECULAR  "SGX_Light_Directional_DiffuseSpecular"
    00053 #define SGX_FUNC_LIGHT_POINT_DIFFUSE                "SGX_Light_Point_Diffuse"
    00054 #define SGX_FUNC_LIGHT_POINT_DIFFUSESPECULAR        "SGX_Light_Point_DiffuseSpecular"
    00055 #define SGX_FUNC_LIGHT_SPOT_DIFFUSE                 "SGX_Light_Spot_Diffuse"
    00056 #define SGX_FUNC_LIGHT_SPOT_DIFFUSESPECULAR         "SGX_Light_Spot_DiffuseSpecular"
    00057
    00061 class _OgreRTSSExport PerPixelLighting : public SubRenderState
    00062 {
    00063
    00064 // Interface.
    00065 public:
    00067     PerPixelLighting();
    00068
    00072     virtual const String& getType() const;
    00073
    00077     virtual int getExecutionOrder() const;
    00078
    00082     virtual void updateGpuProgramsParams(Renderable* rend, Pass* pass, const AutoParamDataSource* source, const LightList* pLightList);
    00083
    00087     virtual void copyFrom(const SubRenderState& rhs);
    00088
    00089
    00093     virtual bool preAddToRenderState(const RenderState* renderState, Pass* srcPass, Pass* dstPass);
    00094
    00095
    00096
    00097     static String Type;
    00098
    00099 // Protected types:
    00100 protected:
    00101
    00102     // Per light parameters.
    00103     struct _OgreRTSSExport LightParams
    00104     {
    00105         Light::LightTypes       mType;              // Light type.
    00106         // Light position.
    00107         UniformParameterPtr mPosition;
    00108         // Light direction.
    00109         UniformParameterPtr mDirection;
    00110         // Attenuation parameters.
    00111         UniformParameterPtr mAttenuatParams;
    00112         // Spot light parameters.
    00113         UniformParameterPtr mSpotParams;
    00114         // Diffuse colour.
    00115         UniformParameterPtr mDiffuseColour;
    00116         // Specular colour.
    00117         UniformParameterPtr mSpecularColour;
    00118
    00119     };
    00120
    00121     typedef vector<LightParams>::type LightParamsList;
    00122     typedef LightParamsList::iterator LightParamsIterator;
    00123     typedef LightParamsList::const_iterator LightParamsConstIterator;
    00124
    00125 // Protected methods
    00126 protected:
    00127
    00133     void setTrackVertexColourType(TrackVertexColourType type) { mTrackVertexColourType = type; }
    00134
    00138     TrackVertexColourType getTrackVertexColourType() const { return mTrackVertexColourType; }
    00139
    00140
    00145     void setLightCount(const int lightCount[3]);
    00146
    00151     void getLightCount(int lightCount[3]) const;
    00157     void setSpecularEnable(bool enable) { mSpecularEnable = enable; }
    00158
    00162     bool getSpecularEnable() const { return mSpecularEnable; }
    00163
    00164
    00168     virtual bool resolveParameters(ProgramSet* programSet);
    00169
    00171     bool resolveGlobalParameters(ProgramSet* programSet);
    00172
    00174     bool resolvePerLightParameters(ProgramSet* programSet);
    00175
    00179     virtual bool resolveDependencies(ProgramSet* programSet);
    00180
    00184     virtual bool addFunctionInvocations(ProgramSet* programSet);
    00185
    00186
    00190     bool addVSInvocation(Function* vsMain, const int groupOrder, int& internalCounter);
    00191
    00192
    00196     bool addPSGlobalIlluminationInvocation(Function* psMain, const int groupOrder, int& internalCounter);
    00197
    00201     bool addPSIlluminationInvocation(LightParams* curLightParams, Function* psMain, const int groupOrder, int& internalCounter);
    00202
    00206     bool addPSFinalAssignmentInvocation(Function* psMain, const int groupOrder, int& internalCounter);
    00207
    00208
    00209 // Attributes.
    00210 protected:
    00211     // Track per vertex colour type.
    00212     TrackVertexColourType mTrackVertexColourType;
    00213     // Specular component enabled/disabled.
    00214     bool mSpecularEnable;
    00215     // Light list.
    00216     LightParamsList mLightParamsList;
    00217     // World view matrix parameter.
    00218     UniformParameterPtr mWorldViewMatrix;
    00219     // World view matrix inverse transpose parameter.
    00220     UniformParameterPtr mWorldViewITMatrix;
    00221     // Vertex shader input position parameter.
    00222     ParameterPtr mVSInPosition;
    00223     // Vertex shader output view position (position in camera space) parameter.
    00224     ParameterPtr mVSOutViewPos;
    00225     // Pixel shader input view position (position in camera space) parameter.
    00226     ParameterPtr mPSInViewPos;
    00227     // Vertex shader input normal.
    00228     ParameterPtr mVSInNormal;
    00229     // Vertex shader output normal.
    00230     ParameterPtr mVSOutNormal;
    00231     // Pixel shader input normal.
    00232     ParameterPtr mPSInNormal;
    00233     // Pixel shader temporary diffuse calculation parameter.
    00234     ParameterPtr mPSTempDiffuseColour;
    00235     // Pixel shader temporary specular calculation parameter.
    00236     ParameterPtr mPSTempSpecularColour;
    00237     // Pixel shader input/local diffuse parameter.
    00238     ParameterPtr mPSDiffuse;
    00239     // Pixel shader input/local specular parameter.
    00240     ParameterPtr mPSSpecular;
    00241     // Pixel shader output diffuse parameter.
    00242     ParameterPtr mPSOutDiffuse;
    00243     // Pixel shader output specular parameter.
    00244     ParameterPtr mPSOutSpecular;
    00245     // Derived scene colour parameter.
    00246     UniformParameterPtr mDerivedSceneColour;
    00247     // Ambient light colour parameter.
    00248     UniformParameterPtr mLightAmbientColour;
    00249     // Derived ambient light colour parameter.
    00250     UniformParameterPtr mDerivedAmbientLightColour;
    00251     // Surface ambient colour parameter.
    00252     UniformParameterPtr mSurfaceAmbientColour;
    00253     // Surface diffuse colour parameter.
    00254     UniformParameterPtr mSurfaceDiffuseColour;
    00255     // Surface specular colour parameter.
    00256     UniformParameterPtr mSurfaceSpecularColour;
    00257     // Surface emissive colour parameter.
    00258     UniformParameterPtr mSurfaceEmissiveColour;
    00259     // Surface shininess parameter.
    00260     UniformParameterPtr mSurfaceShininess;
    00261     // Shared blank light.
    00262     static Light msBlankLight;
    00263 };
    00264
    00265
    00270 class _OgreRTSSExport PerPixelLightingFactory : public SubRenderStateFactory
    00271 {
    00272 public:
    00273
    00277     virtual const String& getType() const;
    00278
    00282     virtual SubRenderState* createInstance(ScriptCompiler* compiler, PropertyAbstractNode* prop, Pass* pass, SGScriptTranslator* translator);
    00283
    00287     virtual void writeInstance(MaterialSerializer* ser, SubRenderState* subRenderState, Pass* srcPass, Pass* dstPass);
    00288
    00289
    00290 protected:
    00291
    00295     virtual SubRenderState* createInstanceImpl();
    00296
    00297
    00298 };
    00299
    00303 }
    00304 }
    00305
    00306 #endif
    00307 #endif
    00308

Copyright © 2012 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Last modified Sun Sep 2 2012 07:27:23