OgreShaderFFPFog.h
Go to the documentation of this file.
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 _ShaderFFPFog_
00028 #define _ShaderFFPFog_
00029 
00030 #include "OgreShaderPrerequisites.h"
00031 #ifdef RTSHADER_SYSTEM_BUILD_CORE_SHADERS
00032 #include "OgreShaderParameter.h"
00033 #include "OgreShaderSubRenderState.h"
00034 #include "OgreVector4.h"
00035 
00036 namespace Ogre {
00037 namespace RTShader {
00038 
00050 class _OgreRTSSExport FFPFog : public SubRenderState
00051 {
00052 public:
00053 
00054     // Fog calculation mode enum.
00055     enum CalcMode
00056     {
00057         CM_PER_VERTEX   = 1,        // Per vertex fog calculations. (Default).
00058         CM_PER_PIXEL    = 2         // Per pixel fog calculations.
00059     };
00060 
00061 // Interface.
00062 public:
00063 
00065     FFPFog();
00066 
00070     virtual const String& getType() const;
00071 
00075     virtual int getExecutionOrder() const;
00076 
00080     virtual void updateGpuProgramsParams(Renderable* rend, Pass* pass, const AutoParamDataSource* source, const LightList* pLightList);
00081 
00085     virtual void copyFrom(const SubRenderState& rhs);
00086 
00090     virtual bool preAddToRenderState(const RenderState* renderState, Pass* srcPass, Pass* dstPass);
00091 
00101     void setFogProperties(FogMode fogMode, 
00102         const ColourValue& fogColour, 
00103         float fogStart, 
00104         float fogEnd, 
00105         float fogDensity);
00106 
00111     void setCalcMode(CalcMode calcMode) { mCalcMode = calcMode; }
00112 
00116     CalcMode getCalcMode() const { return mCalcMode; }
00117 
00118     static String Type;
00119 
00120 // Protected methods
00121 protected:
00122 
00126     virtual bool resolveParameters(ProgramSet* programSet);
00127 
00131     virtual bool resolveDependencies(ProgramSet* programSet);
00132 
00136     virtual bool addFunctionInvocations(ProgramSet* programSet);
00137 
00138 // Attributes.
00139 protected:  
00140     // Fog calculation mode.
00141     CalcMode mCalcMode;
00142     // Fog formula. 
00143     FogMode mFogMode;
00144     // Fog colour value.
00145     ColourValue mFogColourValue;
00146     // Fog parameters (density, start, end, 1/end-start).
00147     Vector4 mFogParamsValue;
00148     // True if the fog parameters should be taken from the pass.
00149     bool mPassOverrideParams;
00150 
00151     // World view projection parameter.     
00152     UniformParameterPtr mWorldViewProjMatrix;
00153     // Fog colour parameter.    
00154     UniformParameterPtr mFogColour;
00155     // Fog parameters program parameter.    
00156     UniformParameterPtr mFogParams;
00157     // Vertex shader input position parameter.
00158     ParameterPtr mVSInPos;
00159     // Vertex shader output fog colour parameter.
00160     ParameterPtr mVSOutFogFactor;
00161     // Pixel shader input fog factor.
00162     ParameterPtr mPSInFogFactor;
00163     // Vertex shader output depth.
00164     ParameterPtr mVSOutDepth;
00165     // Pixel shader input depth.
00166     ParameterPtr mPSInDepth;
00167     // Pixel shader output diffuse colour.
00168     ParameterPtr mPSOutDiffuse;
00169 };
00170 
00171 
00176 class _OgreRTSSExport FFPFogFactory : public SubRenderStateFactory
00177 {
00178 public:
00179 
00183     virtual const String& getType() const;
00184 
00188     virtual SubRenderState* createInstance(ScriptCompiler* compiler, PropertyAbstractNode* prop, Pass* pass, SGScriptTranslator* translator);
00189 
00193     virtual void writeInstance(MaterialSerializer* ser, SubRenderState* subRenderState, Pass* srcPass, Pass* dstPass);
00194 
00195     
00196 protected:
00197 
00201     virtual SubRenderState* createInstanceImpl();
00202 
00203 
00204 };
00205 
00209 }
00210 }
00211 
00212 #endif
00213 #endif
00214 

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