ReflectiveEyeLightShader.cxx

   1 #include "ReflectiveEyeLightShader.hxx"
   2 #include "Primitive.hxx"
   3 #include "Scene.hxx"
   4
   5 ReflectiveEyeLightShader::ReflectiveEyeLightShader(Scene* scene,
   6                                                    float reflectivity,
   7                                                    const Vec3f& color)
   8   : EyeLightShader(scene,color),
   9     m_reflectivity(reflectivity)
  10 {
  11 }
  12
  13 ReflectiveEyeLightShader::~ReflectiveEyeLightShader()
  14 {
  15 }
  16
  17 ReflectiveEyeLightShader::ReflectiveEyeLightShader()
  18   : EyeLightShader(0),
  19     m_reflectivity(0)
  20 {
  21 }
  22
  23 Vec3f
  24 ReflectiveEyeLightShader::Shade(Ray& ray)
  25 {
  26   Vec3f eyeColor = EyeLightShader::Shade(ray);
  27   Vec3f reflColor;
  28
  29   if(ray.recursionDepth() > 0) {
  30     m_scene->Intersect(ray);
  31     // intersection, - Epsilon to avoid numerical problems and getting the
  32     // reflection on the object's inside ;-)
  33     Vec3f i = ray.origin() + ray.direction() * (ray.t() - Epsilon);
  34     Vec3f r = ray.direction();
  35     Vec3f n = (ray.hit()->GetNormal(ray));
  36
  37     Ray sec(i, r + n * (2 * r.dot(n * -1)));
  38     sec.setRecursionDepth(ray.recursionDepth() - 1);
  39     reflColor = m_scene->RayTrace(sec);
  40   }
  41   return eyeColor + reflColor * m_reflectivity;
  42 }