public PhongShading(IObject obj, Vector3 hit, Ray ray, RayTracing rayTracing)
{
_hit = hit;
_n = obj.GetNorm(hit);
_mat = obj.Material;
_eh = ray.Direction;
_rayTracing = rayTracing;
_localCoordinates = obj.ToLocalNormalized(hit);
_isLightProbe = obj is LightProbe;
}
private float Shadow(RayTracing rayTracing)
{
if (_isLightProbe || !rayTracing.UseShadows)
{
return(1f);
}
var shadowMultiplier = 1f;
var sPoint = _hit + Vector3.Normalize(_light.Position - _hit) * 0.0001f + _n * 0.0001f;
(var lHit, _, var lambda) = rayTracing.FindClosestHitPoint(new Ray(sPoint, _l));
if (lHit.HasValue && lambda * lambda < (_light.Position - _hit).LengthSquared())
{
shadowMultiplier = 0.2f;
}
return(shadowMultiplier);
}