Added Heidrich-Seidel anisotropic BRDF.

phong_brdf.cpp

@@ -7,12 +7,12 @@ using glm::pow;
 using glm::max;
 using glm::dot;
 
-vec3 PhongBRDF::diffuse(vec3 light_dir, vec3 surface_normal, Ray & incident_ray, vec3 light_diff_color) const {
+vec3 PhongBRDF::diffuse(vec3 light_dir, vec3 surface_normal, Ray & incident_ray, vec3 intersection_point, vec3 light_diff_color) const {
   float n_dot_l = max(dot(surface_normal, light_dir), 0.0f);
   return light_diff_color * n_dot_l;
 }
 
-vec3 PhongBRDF::specular(vec3 light_dir, vec3 surface_normal, Ray & incident_ray, vec3 light_spec_color, float shininess) const {
+vec3 PhongBRDF::specular(vec3 light_dir, vec3 surface_normal, Ray & incident_ray, vec3 intersection_point, vec3 light_spec_color, float shininess) const {
   vec3 ref = reflect(light_dir, surface_normal);
   float r_dot_l = pow(max(dot(ref, incident_ray.m_direction), 0.0f), shininess);
   return light_spec_color * r_dot_l;