public override Vec3 Shade(ShadeRec sr)
{
Vec3 wo = sr.Ray.D * -1;
Vec3 L = ambient.RHO(sr, wo) * sr.World.AmbientLight.L(sr);
foreach (var light in sr.World.Lights)
{
Vec3 wi = light.GetDirection(sr);
float ndotwi = (float)sr.Normal.Dot(wi);
if (ndotwi > 0.0)
{
bool inShadow = false;
if (light.Shadows)
{
Ray shadowRay = new Ray(sr.HitPoint, wi);
inShadow = light.InShadow(shadowRay, sr);
}
if (!inShadow)
{
L += (Diffuse.F(sr, wi, wo) +
specular.F(sr, wi, wo)) *
light.L(sr) * ndotwi;
}
}
}
return(L);
}
public override Vector3 Shade(ShadeRec sr)
{
Vector3 wo = -sr.Ray.Direction;
Vector3 L = ambient.RHO(sr, wo) * sr.World.AmbientLight.L(sr);
int num_lights = sr.World.Lights.Count;
for (int j = 0; j < num_lights; j++)
{
Vector3 wi = sr.World.Lights[j].GetDirection(sr);
float ndotwi = Vector3.Dot(sr.Normal, wi);
if (ndotwi > 0.0)
{
if (Shadows)
{
bool in_shadow = false;
if (sr.World.Lights[j].Shadows)
{
Ray shadowRay = new Ray(sr.HitPoint, wi);
in_shadow = sr.World.Lights[j].InShadow(shadowRay, sr);
}
if (!in_shadow)
{
L += (diffuse.F(sr, wo, wi) + specular.F(sr, wo, wi)) * sr.World.Lights[j].L(sr) * ndotwi;
}
}
else
{
L += (diffuse.F(sr, wo, wi) + specular.F(sr, wo, wi)) * sr.World.Lights[j].L(sr) * ndotwi;
}
}
}
return(L);
}
public override RGBColor Shade(ShadeRec shadeRec)
{
Vector3d wo = -shadeRec.Ray.Direction;
RGBColor L = ambientBRDF.Rho(shadeRec, wo) * shadeRec.World.AmbientLight.L((shadeRec));
for (int i = 0; i < shadeRec.World.Lights.Count; i++)
{
Vector3d wi = shadeRec.World.Lights[i].GetDirection(shadeRec);
double NdotWi = Vector3d.Dot(shadeRec.Normal, wi);
if (NdotWi > 0)
{
L = L + diffuseBRDF.F(shadeRec, wo, wi) +
glossySpecularBRDF.F(shadeRec, wo, wi) * shadeRec.World.Lights[i].L(shadeRec) * NdotWi;
}
}
return(L);
}