# OgreShaderExNormalMapLighting.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) 2000-2009 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 _ShaderExNormalMapLighting_
    00028 #define _ShaderExNormalMapLighting_
    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
    00051 class _OgreRTSSExport NormalMapLighting : public SubRenderState
    00052 {
    00053
    00054 // Interface.
    00055 public:
    00057     NormalMapLighting();
    00058
    00062     virtual const String&   getType                 () const;
    00063
    00067     virtual int             getExecutionOrder       () const;
    00068
    00072     virtual void            updateGpuProgramsParams (Renderable* rend, Pass* pass, const AutoParamDataSource* source, const LightList* pLightList);
    00073
    00077     virtual void            copyFrom                (const SubRenderState& rhs);
    00078
    00079
    00083     virtual bool            preAddToRenderState     (RenderState* renderState, Pass* srcPass, Pass* dstPass);
    00084
    00088     void                    setTexCoordIndex        (unsigned int index) { mVSTexCoordSetIndex = index;}
    00089
    00093     unsigned int            getTexCoordIndex        () const { return mVSTexCoordSetIndex; }
    00094
    00095     // Type of this render state.
    00096     static String Type;
    00097
    00098     // Normal map space definition.
    00099     enum NormalMapSpace
    00100     {
    00101         NMS_TANGENT,        // Normal map contains normal data in tangent space.
    00102                             // This is the default normal mapping behavior and it requires that the
    00103                             // target mesh will have valid tangents within its vertex data.
    00104
    00105         NMS_OBJECT          // Normal map contains normal data in object local space.
    00106                             // This normal mapping technique has the advantages of better visualization results,
    00107                             // lack of artifacts that comes from texture mirroring usage, it doesn't requires tangent
    00108                             // and it also saves some instruction in the vertex shader stage.
    00109                             // The main drawback of using this kind of normal map is that the target object must be static
    00110                             // in terms of local space rotations and translations.
    00111     };
    00112
    00117     void                    setNormalMapSpace           (NormalMapSpace normalMapSpace) { mNormalMapSpace = normalMapSpace; }
    00118
    00120     NormalMapSpace          getNormalMapSpace           () const { return mNormalMapSpace; }
    00121
    00125     void                    setNormalMapTextureName     (const String& textureName) { mNormalMapTextureName = textureName; }
    00126
    00130     const String&           getNormalMapTextureName     () const { return mNormalMapTextureName; }
    00131
    00138     void                    setNormalMapFiltering           (const FilterOptions minFilter, const FilterOptions magFilter, const FilterOptions mipFilter)
    00139     { mNormalMapMinFilter = minFilter; mNormalMapMagFilter = magFilter; mNormalMapMipFilter = mipFilter; }
    00140
    00147     void                    getNormalMapFiltering           (FilterOptions& minFilter, FilterOptions& magFilter, FilterOptions& mipFilter) const
    00148     { minFilter = mNormalMapMinFilter; magFilter = mNormalMapMagFilter ; mipFilter = mNormalMapMipFilter; }
    00149
    00153     void            setNormalMapAnisotropy      (unsigned int anisotropy) { mNormalMapAnisotropy = anisotropy; }
    00154
    00155
    00157     unsigned int    getNormalMapAnisotropy      () const { return mNormalMapAnisotropy; }
    00158
    00159
    00163     void            setNormalMapMipBias     (Real mipBias) { mNormalMapMipBias = mipBias; }
    00164
    00165
    00167     Real            getNormalMapMipBias     () const { return mNormalMapMipBias; }
    00168
    00169
    00170
    00171 // Protected types:
    00172 protected:
    00173
    00174     // Per light parameters.
    00175     struct _OgreRTSSExport LightParams
    00176     {
    00177         Light::LightTypes       mType;              // Light type.
    00178         UniformParameterPtr     mPosition;          // Light position.
    00179         ParameterPtr            mVSOutToLightDir;   // Vertex shader output vertex position to light position direction (texture space).
    00180         ParameterPtr            mPSInToLightDir;    // Pixel shader input vertex position to light position direction (texture space).
    00181         UniformParameterPtr     mDirection;         // Light direction.
    00182         ParameterPtr            mVSOutDirection;    // Vertex shader output light direction (texture space).
    00183         ParameterPtr            mPSInDirection;     // Pixel shader input light direction (texture space).
    00184         UniformParameterPtr     mAttenuatParams;    // Attenuation parameters.
    00185         UniformParameterPtr     mSpotParams;        // Spot light parameters.
    00186         UniformParameterPtr     mDiffuseColour;     // Diffuse colour.
    00187         UniformParameterPtr     mSpecularColour;    // Specular colour.
    00188
    00189     };
    00190
    00191     typedef vector<LightParams>::type               LightParamsList;
    00192     typedef LightParamsList::iterator               LightParamsIterator;
    00193     typedef LightParamsList::const_iterator         LightParamsConstIterator;
    00194
    00195 // Protected methods
    00196 protected:
    00197
    00203     void                    setTrackVertexColourType(TrackVertexColourType type) { mTrackVertexColourType = type; }
    00204
    00208     TrackVertexColourType   getTrackVertexColourType() const { return mTrackVertexColourType; }
    00209
    00210
    00215     void                    setLightCount           (const int lightCount[3]);
    00216
    00221     void                    getLightCount           (int lightCount[3]) const;
    00227     void                    setSpecularEnable       (bool enable) { mSpecularEnable = enable; }
    00228
    00232     bool                    getSpecularEnable       () const      { return mSpecularEnable; }
    00233
    00234
    00238     virtual bool            resolveParameters           (ProgramSet* programSet);
    00239
    00241     bool                    resolveGlobalParameters     (ProgramSet* programSet);
    00242
    00244     bool                    resolvePerLightParameters   (ProgramSet* programSet);
    00245
    00249     virtual bool            resolveDependencies     (ProgramSet* programSet);
    00250
    00254     virtual bool            addFunctionInvocations  (ProgramSet* programSet);
    00255
    00256
    00260     bool            addVSInvocation                     (Function* vsMain, const int groupOrder, int& internalCounter);
    00261
    00265     bool            addVSIlluminationInvocation         (LightParams* curLightParams, Function* vsMain, const int groupOrder, int& internalCounter);
    00266
    00270     bool            addPSNormalFetchInvocation      (Function* psMain, const int groupOrder, int& internalCounter);
    00271
    00272
    00276     bool            addPSGlobalIlluminationInvocation   (Function* psMain, const int groupOrder, int& internalCounter);
    00277
    00281     bool            addPSIlluminationInvocation     (LightParams* curLightParams, Function* psMain, const int groupOrder, int& internalCounter);
    00282
    00286     bool            addPSFinalAssignmentInvocation  (Function* psMain, const int groupOrder, int& internalCounter);
    00287
    00288
    00289 // Attributes.
    00290 protected:
    00291     String                  mNormalMapTextureName;          // The normal map texture name.
    00292     TrackVertexColourType   mTrackVertexColourType;         // Track per vertex colour type.
    00293     bool                    mSpecularEnable;                // Specular component enabled/disabled.
    00294     LightParamsList         mLightParamsList;               // Light list.
    00295     unsigned short          mNormalMapSamplerIndex;         // Normal map texture sampler index.
    00296     unsigned int            mVSTexCoordSetIndex;            // Vertex shader input texture coordinate set index.
    00297     FilterOptions           mNormalMapMinFilter;            // The normal map min filter.
    00298     FilterOptions           mNormalMapMagFilter;            // The normal map mag filter.
    00299     FilterOptions           mNormalMapMipFilter;            // The normal map mip filter.
    00300     unsigned int            mNormalMapAnisotropy;           // The normal map max anisotropy value.
    00301     Real                    mNormalMapMipBias;              // The normal map mip map bias.
    00302     NormalMapSpace          mNormalMapSpace;                // The normal map space.
    00303     UniformParameterPtr     mWorldMatrix;                   // World matrix parameter.
    00304     UniformParameterPtr     mWorldInvRotMatrix;             // World matrix inverse rotation matrix parameter.
    00305     UniformParameterPtr     mCamPosWorldSpace;              // Camera position in world space parameter.
    00306     ParameterPtr            mVSInPosition;                  // Vertex shader input position parameter.
    00307     ParameterPtr            mVSWorldPosition;               // Vertex shader world position parameter.
    00308     ParameterPtr            mVSOutView;                     // Vertex shader output view vector (position in camera space) parameter.
    00309     ParameterPtr            mPSInView;                      // Pixel shader input view position (position in camera space) parameter.
    00310     ParameterPtr            mVSInNormal;                    // Vertex shader input normal.
    00311     ParameterPtr            mVSInTangent;                   // Vertex shader input tangent.
    00312     ParameterPtr            mVSTBNMatrix;                   // Vertex shader local TNB matrix.
    00313     ParameterPtr            mVSLocalDir;                    // Vertex shader local light direction.
    00314     UniformParameterPtr     mNormalMapSampler;              // Normal map texture sampler parameter.
    00315     ParameterPtr            mPSNormal;                      // Pixel shader normal parameter.
    00316     ParameterPtr            mVSInTexcoord;                  // Vertex shader input texture coordinates.
    00317     ParameterPtr            mVSOutTexcoord;                 // Vertex shader output texture coordinates.
    00318     ParameterPtr            mPSInTexcoord;                  // Pixel shader input texture coordinates.
    00319     ParameterPtr            mPSTempDiffuseColour;           // Pixel shader temporary diffuse calculation parameter.
    00320     ParameterPtr            mPSTempSpecularColour;          // Pixel shader temporary specular calculation parameter.
    00321     ParameterPtr            mPSDiffuse;                     // Pixel shader input/local diffuse parameter.
    00322     ParameterPtr            mPSSpecular;                    // Pixel shader input/local specular parameter.
    00323     ParameterPtr            mPSOutDiffuse;                  // Pixel shader output diffuse parameter.
    00324     ParameterPtr            mPSOutSpecular;                 // Pixel shader output specular parameter.
    00325     UniformParameterPtr     mDerivedSceneColour;            // Derived scene colour parameter.
    00326     UniformParameterPtr     mLightAmbientColour;            // Ambient light colour parameter.
    00327     UniformParameterPtr     mDerivedAmbientLightColour;     // Derived ambient light colour parameter.
    00328     UniformParameterPtr     mSurfaceAmbientColour;          // Surface ambient colour parameter.
    00329     UniformParameterPtr     mSurfaceDiffuseColour;          // Surface diffuse colour parameter.
    00330     UniformParameterPtr     mSurfaceSpecularColour;         // Surface specular colour parameter.
    00331     UniformParameterPtr     mSurfaceEmissiveColour;         // Surface emissive colour parameter.
    00332     UniformParameterPtr     mSurfaceShininess;              // Surface shininess parameter.
    00333     static Light            msBlankLight;                   // Shared blank light.
    00334 };
    00335
    00336
    00341 class _OgreRTSSExport NormalMapLightingFactory : public SubRenderStateFactory
    00342 {
    00343 public:
    00344
    00348     virtual const String&   getType             () const;
    00349
    00353     virtual SubRenderState* createInstance      (ScriptCompiler* compiler, PropertyAbstractNode* prop, Pass* pass);
    00354
    00358     virtual void            writeInstance       (MaterialSerializer* ser, SubRenderState* subRenderState, Pass* srcPass, Pass* dstPass);
    00359
    00360
    00361 protected:
    00362
    00366     virtual SubRenderState* createInstanceImpl  ();
    00367
    00368
    00369 };
    00370
    00374 }
    00375 }
    00376
    00377 #endif
    00378 #endif
    00379

Copyright © 2008 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Last modified Wed Nov 3 2010 19:24:52