libogre-dev 1.7.4-3 / usr / include / OGRE / Terrain / OgreTerrainMaterialGeneratorA.h

/*
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This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
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Copyright (c) 2000-2011 Torus Knot Software Ltd

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*/

#ifndef __Ogre_TerrainMaterialGeneratorA_H__
#define __Ogre_TerrainMaterialGeneratorA_H__

#include "OgreTerrainPrerequisites.h"
#include "OgreTerrainMaterialGenerator.h"
#include "OgreGpuProgramParams.h"

namespace Ogre
{
	class PSSMShadowCameraSetup;

	/** \addtogroup Optional Components
	*  @{
	*/
	/** \addtogroup Terrain
	*  Some details on the terrain component
	*  @{
	*/


	/** A TerrainMaterialGenerator which can cope with normal mapped, specular mapped
		terrain. 
		@note Requires the Cg plugin to render correctly
	*/
	class _OgreTerrainExport TerrainMaterialGeneratorA : public TerrainMaterialGenerator
	{
	public:
		TerrainMaterialGeneratorA();
		~TerrainMaterialGeneratorA();

		/** Shader model 2 profile target. 
		*/
		class _OgreTerrainExport SM2Profile : public TerrainMaterialGenerator::Profile
		{
		public:
			SM2Profile(TerrainMaterialGenerator* parent, const String& name, const String& desc);
			~SM2Profile();
			MaterialPtr generate(const Terrain* terrain);
			MaterialPtr generateForCompositeMap(const Terrain* terrain);
			uint8 getMaxLayers(const Terrain* terrain) const;
			void updateParams(const MaterialPtr& mat, const Terrain* terrain);
			void updateParamsForCompositeMap(const MaterialPtr& mat, const Terrain* terrain);
			void requestOptions(Terrain* terrain);

			/** Whether to support normal mapping per layer in the shader (default true). 
			*/
			bool isLayerNormalMappingEnabled() const  { return mLayerNormalMappingEnabled; }
			/** Whether to support normal mapping per layer in the shader (default true). 
			*/
			void setLayerNormalMappingEnabled(bool enabled);
			/** Whether to support parallax mapping per layer in the shader (default true). 
			*/
			bool isLayerParallaxMappingEnabled() const  { return mLayerParallaxMappingEnabled; }
			/** Whether to support parallax mapping per layer in the shader (default true). 
			*/
			void setLayerParallaxMappingEnabled(bool enabled);
			/** Whether to support specular mapping per layer in the shader (default true). 
			*/
			bool isLayerSpecularMappingEnabled() const  { return mLayerSpecularMappingEnabled; }
			/** Whether to support specular mapping per layer in the shader (default true). 
			*/
			void setLayerSpecularMappingEnabled(bool enabled);
			/** Whether to support a global colour map over the terrain in the shader,
				if it's present (default true). 
			*/
			bool isGlobalColourMapEnabled() const  { return mGlobalColourMapEnabled; }
			/** Whether to support a global colour map over the terrain in the shader,
			if it's present (default true). 
			*/
			void setGlobalColourMapEnabled(bool enabled);
			/** Whether to support a light map over the terrain in the shader,
			if it's present (default true). 
			*/
			bool isLightmapEnabled() const  { return mLightmapEnabled; }
			/** Whether to support a light map over the terrain in the shader,
			if it's present (default true). 
			*/
			void setLightmapEnabled(bool enabled);
			/** Whether to use the composite map to provide a lower LOD technique
				in the distance (default true). 
			*/
			bool isCompositeMapEnabled() const  { return mCompositeMapEnabled; }
			/** Whether to use the composite map to provide a lower LOD technique
			in the distance (default true). 
			*/
			void setCompositeMapEnabled(bool enabled);
			/** Whether to support dynamic texture shadows received from other 
				objects, on the terrain (default true). 
			*/
			bool getReceiveDynamicShadowsEnabled() const  { return mReceiveDynamicShadows; }
			/** Whether to support dynamic texture shadows received from other 
			objects, on the terrain (default true). 
			*/
			void setReceiveDynamicShadowsEnabled(bool enabled);

			/** Whether to use PSSM support dynamic texture shadows, and if so the 
				settings to use (default 0). 
			*/
			void setReceiveDynamicShadowsPSSM(PSSMShadowCameraSetup* pssmSettings);
			/** Whether to use PSSM support dynamic texture shadows, and if so the 
			settings to use (default 0). 
			*/
			PSSMShadowCameraSetup* getReceiveDynamicShadowsPSSM() const { return mPSSM; }
			/** Whether to use depth shadows (default false). 
			*/
			void setReceiveDynamicShadowsDepth(bool enabled);
			/** Whether to use depth shadows (default false). 
			*/
			bool getReceiveDynamicShadowsDepth() const { return mDepthShadows; }
			/** Whether to use shadows on low LOD material rendering (when using composite map) (default false). 
			*/
			void setReceiveDynamicShadowsLowLod(bool enabled);
			/** Whether to use shadows on low LOD material rendering (when using composite map) (default false). 
			*/
			bool getReceiveDynamicShadowsLowLod() const { return mLowLodShadows; }

			/// Internal
			bool _isSM3Available() const { return mSM3Available; }
		
		protected:

			enum TechniqueType
			{
				HIGH_LOD, 
				LOW_LOD, 
				RENDER_COMPOSITE_MAP
			};
			void addTechnique(const MaterialPtr& mat, const Terrain* terrain, TechniqueType tt);

			/// Interface definition for helper class to generate shaders
			class _OgreTerrainExport ShaderHelper : public TerrainAlloc
			{
			public:
				ShaderHelper() {}
				virtual ~ShaderHelper() {}
				virtual HighLevelGpuProgramPtr generateVertexProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				virtual HighLevelGpuProgramPtr generateFragmentProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				virtual void updateParams(const SM2Profile* prof, const MaterialPtr& mat, const Terrain* terrain, bool compositeMap);
			protected:
				virtual String getVertexProgramName(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				virtual String getFragmentProgramName(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				virtual HighLevelGpuProgramPtr createVertexProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt) = 0;
				virtual HighLevelGpuProgramPtr createFragmentProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt) = 0;
				virtual void generateVertexProgramSource(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				virtual void generateFragmentProgramSource(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				virtual void generateVpHeader(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) = 0;
				virtual void generateFpHeader(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) = 0;
				virtual void generateVpLayer(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, uint layer, StringUtil::StrStreamType& outStream) = 0;
				virtual void generateFpLayer(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, uint layer, StringUtil::StrStreamType& outStream) = 0;
				virtual void generateVpFooter(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) = 0;
				virtual void generateFpFooter(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) = 0;
				virtual void defaultVpParams(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, const HighLevelGpuProgramPtr& prog);
				virtual void defaultFpParams(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, const HighLevelGpuProgramPtr& prog);
				virtual void updateVpParams(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, const GpuProgramParametersSharedPtr& params);
				virtual void updateFpParams(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, const GpuProgramParametersSharedPtr& params);
				static String getChannel(uint idx);

				size_t mShadowSamplerStartHi;
				size_t mShadowSamplerStartLo;

			};

			/// Utility class to help with generating shaders for Cg / HLSL.
			class _OgreTerrainExport ShaderHelperCg : public ShaderHelper
			{
			protected:
				HighLevelGpuProgramPtr createVertexProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				HighLevelGpuProgramPtr createFragmentProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				void generateVpHeader(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateFpHeader(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateVpLayer(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, uint layer, StringUtil::StrStreamType& outStream);
				void generateFpLayer(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, uint layer, StringUtil::StrStreamType& outStream);
				void generateVpFooter(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateFpFooter(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				uint generateVpDynamicShadowsParams(uint texCoordStart, const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateVpDynamicShadows(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateFpDynamicShadowsHelpers(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateFpDynamicShadowsParams(uint* texCoord, uint* sampler, const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
				void generateFpDynamicShadows(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream);
			};

			class _OgreTerrainExport ShaderHelperHLSL : public ShaderHelperCg
			{
			protected:
				HighLevelGpuProgramPtr createVertexProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				HighLevelGpuProgramPtr createFragmentProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
			};

			/// Utility class to help with generating shaders for GLSL.
			class _OgreTerrainExport ShaderHelperGLSL : public ShaderHelper
			{
			protected:
				HighLevelGpuProgramPtr createVertexProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				HighLevelGpuProgramPtr createFragmentProgram(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt);
				void generateVpHeader(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) {}
				void generateFpHeader(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) {}
				void generateVpLayer(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, uint layer, StringUtil::StrStreamType& outStream) {}
				void generateFpLayer(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, uint layer, StringUtil::StrStreamType& outStream) {}
				void generateVpFooter(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) {}
				void generateFpFooter(const SM2Profile* prof, const Terrain* terrain, TechniqueType tt, StringUtil::StrStreamType& outStream) {}
			};

			ShaderHelper* mShaderGen;
			bool mLayerNormalMappingEnabled;
			bool mLayerParallaxMappingEnabled;
			bool mLayerSpecularMappingEnabled;
			bool mGlobalColourMapEnabled;
			bool mLightmapEnabled;
			bool mCompositeMapEnabled;
			bool mReceiveDynamicShadows;
			PSSMShadowCameraSetup* mPSSM;
			bool mDepthShadows;
			bool mLowLodShadows;
			bool mSM3Available;

			bool isShadowingEnabled(TechniqueType tt, const Terrain* terrain) const;

		};




	};



	/** @} */
	/** @} */


}

#endif