public override bool Scatter(RTRay ray, HitRecord hit, out Color attenuation, out RTRay scattered)
{
Vector3 reflected = RTMath.Reflect(ray.direction.normalized, hit.n);
scattered = new RTRay().Set(hit.p, reflected + fuzz * RTMath.RndInUnitSphere());
attenuation = albedo;
return(Vector3.Dot(scattered.direction, hit.n) > 0);
}
public override bool Scatter(RTRay ray, HitRecord hit, out Color attenuation, out RTRay scattered)
{
attenuation = new Color(1, 1, 1);
Vector3 outwardN;
float ni_over_nt;
Vector3 refracted;
float reflect_prob;
float cosine;
if (Vector3.Dot(ray.direction, hit.n) > 0)
{
outwardN = -hit.n;
ni_over_nt = refractiveIndex;
cosine = Vector3.Dot(ray.direction, hit.n) / ray.direction.magnitude;
}
else
{
outwardN = hit.n;
ni_over_nt = 1.0f / refractiveIndex;
cosine = -Vector3.Dot(ray.direction, hit.n) / ray.direction.magnitude;
}
if (RTMath.Refract(ray.direction, outwardN, ni_over_nt, out refracted))
{
reflect_prob = RTMath.schlick(cosine, refractiveIndex);
}
else
{
reflect_prob = 1.0f;
}
if (RTMath.Rnd01() < reflect_prob)
{
scattered = new RTRay().Set(hit.p, RTMath.Reflect(ray.direction, hit.n));
}
else
{
scattered = new RTRay().Set(hit.p, refracted);
}
return(true);
}
