public ColorIntensity RayIntensity(SDScene scene, RayData data)
{
ColorIntensity color = new ColorIntensity();
float lightPass = LightPassValue(scene.ClosestDistance, data.Pos);
if (lightPass == 0f)
{
return(color);
}
Vec3f dir = (Pos - data.Pos).Normalized();
float diffuseDot = dir.Dot(data.Normal);
if (diffuseDot > 0f)
{
color += data.Mat.DiffuseIntensity * DiffuseIntensity * diffuseDot * lightPass;
Vec3f reflectionDir = 2f * dir.Dot(data.Normal) * data.Normal - dir;
Vec3f viewerDir = (data.RayOrigin - data.Pos).Normalized();
float specularDot = reflectionDir.Dot(viewerDir);
if (specularDot > 0f)
{
color += SpecularIntensity * data.Mat.Specular
* MathF.Pow(specularDot, data.Mat.Shininess) * lightPass;
}
}
return(color.AtDistance((Pos - data.Pos).Magnitude));
}
public ColorIntensity RayIntensity(RayData data)
{
if (Scene == null)
{
throw new MemberAccessException("A scene must be stored in Lighting.Scene");
}
ColorIntensity color = new ColorIntensity();
foreach (ILight light in Lights)
{
color += light.RayIntensity(Scene, data);
}
return(color + data.Mat.AmbientIntensity * AmbientIntensity);
}