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OgreShaderExIntegratedPSSM3.h
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1 /*
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3 This source file is part of OGRE
4 (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org/
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7 Copyright (c) 2000-2014 Torus Knot Software Ltd
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9 Permission is hereby granted, free of charge, to any person obtaining a copy
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28 #ifndef _ShaderExIntegratedPSSM3_
29 #define _ShaderExIntegratedPSSM3_
30 
32 #ifdef RTSHADER_SYSTEM_BUILD_EXT_SHADERS
33 #include "OgreVector4.h"
34 #include "OgreLight.h"
35 #include "OgreCommon.h"
37 #include "OgreShaderParameter.h"
38 
39 namespace Ogre {
40 namespace RTShader {
41 
49 #define SGX_LIB_INTEGRATEDPSSM "SGXLib_IntegratedPSSM"
50 #define SGX_FUNC_COMPUTE_SHADOW_COLOUR3 "SGX_ComputeShadowFactor_PSSM3"
51 #define SGX_FUNC_APPLYSHADOWFACTOR_DIFFUSE "SGX_ApplyShadowFactor_Diffuse"
52 #define SGX_FUNC_MODULATE_SCALAR "SGX_ModulateScalar"
53 
57 class _OgreRTSSExport IntegratedPSSM3 : public SubRenderState
58 {
59 
60  // Interface.
61 public:
62  typedef vector<Real>::type SplitPointList;
63 
65  IntegratedPSSM3();
66 
70  virtual const String& getType() const;
71 
75  virtual int getExecutionOrder() const;
76 
80  virtual void updateGpuProgramsParams(Renderable* rend, Pass* pass, const AutoParamDataSource* source, const LightList* pLightList);
81 
85  virtual void copyFrom(const SubRenderState& rhs);
86 
87 
91  virtual bool preAddToRenderState(const RenderState* renderState, Pass* srcPass, Pass* dstPass);
92 
93 
94 
101  void setSplitPoints(const SplitPointList& newSplitPoints);
102 
103  static String Type;
104 
105  // Protected types:
106 protected:
107 
108  // Shadow texture parameters.
109  struct _OgreRTSSExport ShadowTextureParams
110  {
111  // The max range of this shadow texture in terms of PSSM (far plane of viewing camera).
112  Real mMaxRange;
113  // The shadow map sampler index.
114  unsigned int mTextureSamplerIndex;
115  // The shadow map sampler.
116  UniformParameterPtr mTextureSampler;
117  // The inverse texture
118  UniformParameterPtr mInvTextureSize;
119  // The source light view projection matrix combined with world matrix.
120  UniformParameterPtr mWorldViewProjMatrix;
121  // The vertex shader output position in light space.
122  ParameterPtr mVSOutLightPosition;
123  // The pixel shader input position in light space.
124  ParameterPtr mPSInLightPosition;
125 
126  };
127 
128  typedef vector<ShadowTextureParams>::type ShadowTextureParamsList;
129  typedef ShadowTextureParamsList::iterator ShadowTextureParamsIterator;
130  typedef ShadowTextureParamsList::const_iterator ShadowTextureParamsConstIterator;
131 
132  // Protected methods
133 protected:
134 
135 
136 
140  virtual bool resolveParameters(ProgramSet* programSet);
141 
145  virtual bool resolveDependencies(ProgramSet* programSet);
146 
150  virtual bool addFunctionInvocations(ProgramSet* programSet);
151 
155  bool addVSInvocation(Function* vsMain, const int groupOrder, int& internalCounter);
156 
160  bool addPSInvocation(Program* psProgram, const int groupOrder, int& internalCounter);
161 
162 
163 
164 
165 
166  // Attributes.
167 protected:
168  // Shadow texture parameter list.
169  ShadowTextureParamsList mShadowTextureParamsList;
170  // Split points parameter.
171  UniformParameterPtr mPSSplitPoints;
172  // Vertex shader input position parameter.
173  ParameterPtr mVSInPos;
174  // Vertex shader output position (clip space) parameter.
175  ParameterPtr mVSOutPos;
176  // Vertex shader output depth (clip space) parameter.
177  ParameterPtr mVSOutDepth;
178  // Pixel shader input depth (clip space) parameter.
179  ParameterPtr mPSInDepth;
180  // Pixel shader local computed shadow colour parameter.
181  ParameterPtr mPSLocalShadowFactor;
182  // Pixel shader in/local diffuse colour parameter.
183  ParameterPtr mPSDiffuse;
184  // Pixel shader output diffuse colour parameter.
185  ParameterPtr mPSOutDiffuse;
186  // Pixel shader in/local specular colour parameter.
187  ParameterPtr mPSSpecualr;
188  // Derived scene colour (ambient term).
189  UniformParameterPtr mPSDerivedSceneColour;
190 
191 };
192 
193 
198 class _OgreRTSSExport IntegratedPSSM3Factory : public SubRenderStateFactory
199 {
200 public:
201 
205  virtual const String& getType() const;
206 
210  virtual SubRenderState* createInstance(ScriptCompiler* compiler, PropertyAbstractNode* prop, Pass* pass, SGScriptTranslator* translator);
211 
212 
213 protected:
214 
218  virtual SubRenderState* createInstanceImpl();
219 
220 
221 };
222 
226 }
227 }
228 
229 #endif
230 #endif
231 
float Real
Software floating point type.
HashedVector< Light * > LightList
Definition: OgreCommon.h:541
std::vector< Real, A > type
SharedPtr< Parameter > ParameterPtr
#define _OgreRTSSExport
_StringBase String
SharedPtr< UniformParameter > UniformParameterPtr