src/WoodShader.h

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#ifndef WOODSHADER_H
#define WOODSHADER_H


#include "ProceduralShader.h"
#include "Primitive.h"


class WoodShader : public ProceduralShader
{
public:
    WoodShader(Scene *             scene,
               const RGBAColor &   color = RGBAColor(0.47, 0.23, 0.07))
        : ProceduralShader(scene, 0.99f, 0.35f, 5),  /* some magic numbers which makes nice wood effects */
          mMarkPerlin(0.05f, 6.0f, 8),
          mColor(color)
    {
    }

    RGBAColor shade(const Ray & ray) const
    {
        assert(false); //shader is not really ready yet

//        const RGBAColor marks(222.0/255.0, 184.0/255.0, 135/255.0);
//        const RGBAColor marks(0,0,0,1);
        const RGBAColor marks( 0.30,0.16,0.16);
        TexCoordinate uv = ray.hit()->texCoord(ray);
        uv.setY(std::min(std::max(uv.y(), 0.0f), 1.0f));
        
        Vec3f hit = ray.hitPoint(-EPSILON);
        //FIXME transformation thingy

//        float noise = mPerlin.perlinNoise3D(hit.x(), hit.y(), hit.z()) * 20;
        float noise = mPerlin.perlinNoise3D(uv.x(), uv.y(), 10);
        float grain = noise - floor(noise);
        
        float bumps = mMarkPerlin.perlinNoise3D(hit.x() * 50, hit.y() * 50, hit.z()*20 );
        
        LOG(grain);
//  LOG(bumps);
        // bumps = std::max(0.0f,std::min(1.0f,bumps));
        //LOG(bumps);
        //bumps = bumps / 2.0f;
        //  return mColor * bumps;
        //  if(bumps < 0.5f)
        // {
        //    bumps = 0;
        //}
        //  else
        //    bumps =1;
        lerp(mColor, marks, grain);
        return lerp(mColor, marks, grain);
        return mColor * std::min(1.0f, grain);

        return lerp(mColor * grain, marks, bumps)/4.0f;

/*
        float noise = mPerlin.perlinNoise(uv.x()*1000, (uv.y()+0.66f)*1000)-0.2f;   // *magic*
        
        RGBAColor res = mColor;
        if (noise > 0.0)
            res += RGBAColor(noise * 5);
        
            return res;*/
  }

private:
    PerlinNoise mMarkPerlin;  
    RGBAColor mColor; 
  
};

#endif

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