public override Color shade(ref Shade sr)
{
Vector3 wo = -sr.ray.direction;
Color L = ambient_brdf.rho(ref sr, ref wo) * sr.w.ambient_ptr.L(ref sr);
int num_lights = sr.w.lights.Count;
for (int j = 0; j < num_lights; j++)
{
Vector3 wi = sr.w.lights[j].get_direction(ref sr);
float ndotwi = Vector3.Dot(sr.normal, wi);
if (ndotwi > 0.0)
{
bool inshadow = false;
if (sr.w.lights [j].cast_shadows)
{
Ray shadowRay = new Ray(sr.hit_point, wi);
inshadow = sr.w.lights [j].in_shadow(ref shadowRay, ref sr);
}
if (!inshadow)
{
L += (diffuse_brdf.f(ref sr, ref wo, ref wi) + specular_brdf.f(ref sr, ref wo, ref wi)) * sr.w.lights [j].L(ref sr) * ndotwi;
}
}
}
return(L);
}
public override Color shade(ref Shade sr)
{
Vector3 wo = -sr.ray.direction;
Color L = ambient_brdf.rho(ref sr, ref wo) * sr.w.ambient_ptr.L(ref sr);
int num_lights = sr.w.lights.Count;
for (int j = 0; j < num_lights; j++)
{
Vector3 wi = sr.w.lights[j].get_direction(ref sr);
float ndotwi = Vector3.Dot(sr.normal, wi);
if (ndotwi > 0.0)
{
L += diffuse_brdf.f(ref sr, ref wo, ref wi) * sr.w.lights[j].L(ref sr) * ndotwi;
}
}
return(L);
}