source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Material.h @ 3326

#ifndef __MATERIAL_H
#define __MATERIAL_H

#include "glInterface.h"
#include "common.h"
#include "ShaderProgram.h"


namespace CHCDemoEngine 
{

class Texture;
class RenderState;
class GPUProgramParameters;
class ShaderProgram;
struct RenderQueueBucket;


/** Class representing an rgba color vector.
*/
class RgbaColor 
{

public:

        RgbaColor(): r(1), g(1), b(1), a(1)
        {}

        RgbaColor(float _r, float _g, float _b, float _a): r(_r), g(_g), b(_b), a(_a)
        {}

        friend RgbaColor RandomColor(float a = 0.0f, float b = 1.0f);


        /////////////////////

        float r, g, b, a;
};


// Forward declarations
RgbaColor RandomColor(float a, float b);


/** This class represents a certain rendering technique of a shape.
        A material consists of one or more techniques
*/
class Technique 
{

friend class ResourceManager;
friend class RenderQueue;
friend class Material;

public:

        /** Sets default material (ambient intensity 0.2f, diffuse intensity 1.0f)
        */
        Technique();
        /** Sets ambient and diffuse color to color
        */
        Technique(const RgbaColor &color);
        /** Renders this technique.
        */
        void Render(RenderState *state, SceneEntity *parent = NULL);
        /** Initialize this technique material with default values
        */
        void Init();

        inline Texture *GetTexture() const { return mTexture; }

        inline RgbaColor GetAmbient() const { return mAmbientColor; }
        inline RgbaColor GetDiffuse() const { return mDiffuseColor; }
        inline RgbaColor GetSpecular() const { return mSpecularColor; }
        inline RgbaColor GetEmmisive() const { return mEmmisiveColor; }

        inline void SetTexture(Texture *texture) { mTexture = texture; }

        inline void SetAmbient(const RgbaColor &color) { mAmbientColor = color; }
        inline void SetDiffuse(const RgbaColor &color) { mDiffuseColor = color; }
        inline void SetSpecular(const RgbaColor &color) { mSpecularColor = color; }
        inline void SetEmmisive(const RgbaColor &color) { mEmmisiveColor = color; }
        
        inline void SetAlphaTestEnabled(bool alpha) { mAlphaTestEnabled = alpha; }
        inline void SetCullFaceEnabled(bool cull) { mCullFaceEnabled = cull; }

        inline bool IsAlphaTestEnabled() const { return mAlphaTestEnabled; } 
        inline bool IsCullFaceEnabled() const { return mCullFaceEnabled; } 

        inline void SetLightingEnabled(bool l) { mLightingEnabled = l; }
        inline void SetColorWriteEnabled(bool c) { mColorWriteEnabled = c; }
        inline void SetDepthWriteEnabled(bool d) { mDepthWriteEnabled = d; }

        inline bool IsLightingEnabled() const { return mLightingEnabled; } 
        inline bool IsColorWriteEnabled() const { return mColorWriteEnabled; } 
        inline bool IsDepthWriteEnabled() const { return mDepthWriteEnabled; } 

        void SetFragmentProgram(ShaderProgram *p);
        void SetVertexProgram(ShaderProgram *p);

        inline ShaderProgram *GetFragmentProgram() { return mFragmentProgram; }
        inline ShaderProgram *GetVertexProgram() { return mVertexProgram; }

        /** Get the set of fragment parameters of this technique
        */
        GPUProgramParameters * const GetFragmentProgramParameters() { return &mFragmentProgramParameters; }
        /**  Get the set of vertex parameters of this technique
        */
        GPUProgramParameters * const GetVertexProgramParameters() { return &mVertexProgramParameters; }

protected:

        ///////////

        RgbaColor mDiffuseColor;
        RgbaColor mSpecularColor;
        RgbaColor mAmbientColor;
        RgbaColor mEmmisiveColor;

        bool mAlphaTestEnabled;
        bool mCullFaceEnabled;
        /// the associated texture
        Texture *mTexture;

        GPUProgramParameters mVertexProgramParameters;
        GPUProgramParameters mFragmentProgramParameters;

        ShaderProgram *mFragmentProgram;
        ShaderProgram *mVertexProgram;

        /// if this material can write colors
        bool mColorWriteEnabled;
        /// if lighting is used
        bool mLightingEnabled;
        /// if depth write is enabled
        bool mDepthWriteEnabled;
        /// pointer to the renderqueue bucket this entity belongs to
        RenderQueueBucket *mRenderQueueBucket;
};


/** A material consists of one or more techniques.
*/
class Material
{
public:
        /** Default constructor creating one default technique.
        */
        Material();

        ~Material();
        /** Renders this material.
        */
        void Render(RenderState *state, SceneEntity *parent);
        /** Adds a new technique to the material
        */
        void AddTechnique(Technique *t);
        /** Returns the default technique (usually the first)
        */
        Technique *GetDefaultTechnique() const;

        Technique *GetTechnique(int i) const;
        /** Returns the number of techniques associated with this material
        */
        int GetNumTechniques() const;


protected:

        TechniqueContainer mTechniques;
};

}

#endif