EyeLightShader.cxx

   1 #include "EyeLightShader.hxx"
   2 #include "Primitive.hxx"
   3
   4 EyeLightShader::EyeLightShader(Scene* scene,
   5                                const Vec3f& color)
   6   : Shader(scene),
   7     m_color(color)
   8 {
   9 }
  10
  11 EyeLightShader::~EyeLightShader()
  12 {
  13 }
  14
  15 EyeLightShader::EyeLightShader()
  16   : Shader(0),
  17     m_color(Vec3f())
  18 {
  19 }
  20
  21 Vec3f
  22 EyeLightShader::Shade(Ray& ray)
  23 {
  24   // shade according to cos(theta)
  25   Vec3f r = ray.direction();
  26   Vec3f n = ray.hit()->GetNormal(ray);
  27   float cos_theta = fabs(r.dot(n) / (r.norm() * n.norm()));
  28   return m_color * cos_theta;
  29 }