src/Shader.h

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#ifndef SHADER_H
#define SHADER_H


#include <vector>
#include "Vec3f.h"
#include "RGBAColor.h"
#include "Ray.h"

class Scene;
class Texture;


class Shader
{
public:
    Shader(Scene * scene);

    virtual ~Shader()
    {
    }

    virtual RGBAColor shade(const Ray & ray) const = 0;

    unsigned int textureCount() const;
 
    void addTexture(Texture* tex);
 
    void removeTexture(Texture* tex);
  
    const Texture * texture(unsigned int i) const;
 
    const Texture* bumpTexture() const;
 
    void setBumpTexture(Texture* tex);

    const Vec3f normal(const Ray &  ray) const;
 

    void setBumpCoefficient(const float f)
    {
        mBumpCoeff = f;
    }

    float bumpCoefficient() const
    {
        return mBumpCoeff;
    }

protected:
    Scene *                 mScene;

    std::vector<Texture *>  mTextures;

    Texture* mBumpTexture;

    float mBumpCoeff;
};

#endif

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