#ifndef EYELIGHTTRANSPARENT_HXX
 #define EYELIGHTTRANSPARENT_HXX
 
 #include "Shader.hxx"
 
 class EyeLightTransparentShader : public Shader
 {
     private:
         Vec3f color;
     
     public:
         EyeLightTransparentShader(Scene *scene, Vec3f color) 
         : Shader(scene), color(color)
         {};
 
         ~EyeLightTransparentShader()
         {};
 
         Vec3f Shade(Ray &ray)
         {   
             Vec4f result = Vec4f(0,0,0,0);
 
             // get uv values
             Vec2f uv = ray.hit->GetUV(ray);
 
             // for each assigned texture
             for (unsigned int i = 0; i < getTextureCount(); i++)
             {
                 // get texture value
                 const Vec4f& tex = getTexture(i)->GetTexel(uv);
 
                 // combine texture colors by blending them together
                 result = lerp(result, tex, tex.w());
             }
             
             // if pixel is transparent, then we have to trace the ray back into the scene
             if (result.w() < 1)
             {
                 // create new ray which could be ray traced back into the scene
                 Ray r = ray;
 
                 // the ray should move from the shaded surface
                 r.org = ray.org + ray.t * ray.dir;
                 r.hit = NULL;
                 r.t = Infinity;
 
                 // trace ray back into the scene and get the color
                 Vec3f c = scene->RayTrace(r);
 
                 // combine result witht the texture color
                 // here traced color is our destination color and texture is a source color
                 result = Vec4f(lerp(c, result.xyz(), result.w()), 1);
             }
 
             // return result value multiplied by the eyelight shaded color
             return result.xyz() * color * fabs(Dot(ray.dir,ray.hit->GetNormal(ray)));
         };
 };
 
 #endif