OgreMaterial.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2011 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#ifndef _Material_H__
#define _Material_H__

#include "OgrePrerequisites.h"

#include "OgreResource.h"
#include "OgreIteratorWrappers.h"
#include "OgreCommon.h"
#include "OgreColourValue.h"
#include "OgreBlendMode.h"

namespace Ogre {

    // Forward declaration
    class MaterialPtr;
    class LodStrategy;

    class _OgreExport Material : public Resource
    {
        friend class SceneManager;
        friend class MaterialManager;

    public:
        typedef vector<Real>::type LodValueList;
        typedef ConstVectorIterator<LodValueList> LodValueIterator;
    protected:


        void applyDefaults(void);

        typedef vector<Technique*>::type Techniques;
        Techniques mTechniques;
        Techniques mSupportedTechniques;
        typedef map<unsigned short, Technique*>::type LodTechniques;
        typedef map<unsigned short, LodTechniques*>::type BestTechniquesBySchemeList;
        BestTechniquesBySchemeList mBestTechniquesBySchemeList;

        LodValueList mUserLodValues;
        LodValueList mLodValues;
        const LodStrategy *mLodStrategy;
        bool mReceiveShadows;
        bool mTransparencyCastsShadows;
        bool mCompilationRequired;
        String mUnsupportedReasons;

        void insertSupportedTechnique(Technique* t);

        void clearBestTechniqueList(void);

        void prepareImpl(void);

        void unprepareImpl(void);

        void loadImpl(void);

        void unloadImpl(void);
        size_t calculateSize(void) const { return 0; } // TODO 
    public:

        Material(ResourceManager* creator, const String& name, ResourceHandle handle,
            const String& group, bool isManual = false, ManualResourceLoader* loader = 0);

        ~Material();
        Material& operator=( const Material& rhs );

        bool isTransparent(void) const;

        void setReceiveShadows(bool enabled) { mReceiveShadows = enabled; }
        bool getReceiveShadows(void) const { return mReceiveShadows; }

        void setTransparencyCastsShadows(bool enabled) { mTransparencyCastsShadows = enabled; }
        bool getTransparencyCastsShadows(void) const { return mTransparencyCastsShadows; }

        Technique* createTechnique(void);
        Technique* getTechnique(unsigned short index);
        Technique* getTechnique(const String& name);
        unsigned short getNumTechniques(void) const;
        void removeTechnique(unsigned short index);     
        void removeAllTechniques(void);
        typedef VectorIterator<Techniques> TechniqueIterator;
        TechniqueIterator getTechniqueIterator(void);
        TechniqueIterator getSupportedTechniqueIterator(void);
        
        Technique* getSupportedTechnique(unsigned short index);
        unsigned short getNumSupportedTechniques(void) const;
        const String& getUnsupportedTechniquesExplanation() const { return mUnsupportedReasons; }

        unsigned short getNumLodLevels(unsigned short schemeIndex) const;
        unsigned short getNumLodLevels(const String& schemeName) const;

        Technique* getBestTechnique(unsigned short lodIndex = 0, const Renderable* rend = 0);


        MaterialPtr clone(const String& newName, bool changeGroup = false, 
            const String& newGroup = StringUtil::BLANK) const;

        void copyDetailsTo(MaterialPtr& mat) const;

        void compile(bool autoManageTextureUnits = true);

        // -------------------------------------------------------------------------------
        // The following methods are to make migration from previous versions simpler
        // and to make code easier to write when dealing with simple materials
        // They set the properties which have been moved to Pass for all Techniques and all Passes

        void setPointSize(Real ps);

        void setAmbient(Real red, Real green, Real blue);

        void setAmbient(const ColourValue& ambient);

        void setDiffuse(Real red, Real green, Real blue, Real alpha);

        void setDiffuse(const ColourValue& diffuse);

        void setSpecular(Real red, Real green, Real blue, Real alpha);

        void setSpecular(const ColourValue& specular);

        void setShininess(Real val);

        void setSelfIllumination(Real red, Real green, Real blue);

        void setSelfIllumination(const ColourValue& selfIllum);

        void setDepthCheckEnabled(bool enabled);

        void setDepthWriteEnabled(bool enabled);

        void setDepthFunction( CompareFunction func );

        void setColourWriteEnabled(bool enabled);

        void setCullingMode( CullingMode mode );

        void setManualCullingMode( ManualCullingMode mode );

        void setLightingEnabled(bool enabled);

        void setShadingMode( ShadeOptions mode );

        void setFog(
            bool overrideScene,
            FogMode mode = FOG_NONE,
            const ColourValue& colour = ColourValue::White,
            Real expDensity = 0.001, Real linearStart = 0.0, Real linearEnd = 1.0 );

        void setDepthBias(float constantBias, float slopeScaleBias);

        void setTextureFiltering(TextureFilterOptions filterType);
        void setTextureAnisotropy(int maxAniso);

        void setSceneBlending( const SceneBlendType sbt );

        void setSeparateSceneBlending( const SceneBlendType sbt, const SceneBlendType sbta );

        void setSceneBlending( const SceneBlendFactor sourceFactor, const SceneBlendFactor destFactor);

        void setSeparateSceneBlending( const SceneBlendFactor sourceFactor, const SceneBlendFactor destFactor, const SceneBlendFactor sourceFactorAlpha, const SceneBlendFactor destFactorAlpha);

        void _notifyNeedsRecompile(void);

        void setLodLevels(const LodValueList& lodValues);
        LodValueIterator getLodValueIterator(void) const;

        ushort getLodIndex(Real value) const;

        const LodStrategy *getLodStrategy() const;
        void setLodStrategy(LodStrategy *lodStrategy);

        void touch(void) 
        { 
            if (mCompilationRequired) 
                compile();
            // call superclass
            Resource::touch();
        }
        
        bool applyTextureAliases(const AliasTextureNamePairList& aliasList, const bool apply = true) const;

        bool getCompilationRequired() const
        {
            return mCompilationRequired;
        }


    };

    class _OgreExport MaterialPtr : public SharedPtr<Material> 
    {
    public:
        MaterialPtr() : SharedPtr<Material>() {}
        explicit MaterialPtr(Material* rep) : SharedPtr<Material>(rep) {}
        MaterialPtr(const MaterialPtr& r) : SharedPtr<Material>(r) {} 
        MaterialPtr(const ResourcePtr& r) : SharedPtr<Material>()
        {
            // lock & copy other mutex pointer
            OGRE_MUTEX_CONDITIONAL(r.OGRE_AUTO_MUTEX_NAME)
            {
                OGRE_LOCK_MUTEX(*r.OGRE_AUTO_MUTEX_NAME)
                OGRE_COPY_AUTO_SHARED_MUTEX(r.OGRE_AUTO_MUTEX_NAME)
                pRep = static_cast<Material*>(r.getPointer());
                pUseCount = r.useCountPointer();
                if (pUseCount)
                {
                    ++(*pUseCount);
                }
            }
        }

        MaterialPtr& operator=(const ResourcePtr& r)
        {
            if (pRep == static_cast<Material*>(r.getPointer()))
                return *this;
            release();
            // lock & copy other mutex pointer
            OGRE_MUTEX_CONDITIONAL(r.OGRE_AUTO_MUTEX_NAME)
            {
                OGRE_LOCK_MUTEX(*r.OGRE_AUTO_MUTEX_NAME)
                OGRE_COPY_AUTO_SHARED_MUTEX(r.OGRE_AUTO_MUTEX_NAME)
                pRep = static_cast<Material*>(r.getPointer());
                pUseCount = r.useCountPointer();
                if (pUseCount)
                {
                    ++(*pUseCount);
                }
            }
            else
            {
                // RHS must be a null pointer
                assert(r.isNull() && "RHS must be null if it has no mutex!");
                setNull();
            }
            return *this;
        }
    };
} //namespace 

#endif