Vector3 Color(Ray r, HitableList world)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.001f, float.MaxValue, ref rec))
{
Vector3 target = rec.p + rec.normal + Sphere.random_in_unit_sphere();
return 0.5f * Color(new Ray(rec.p, target - rec.p), world);
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return (1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f);
}
}
Vector3 Color(Ray r, HitableList world)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.0f, float.MaxValue, ref rec))
{
return(0.5f * new Vector3(rec.normal.X + 1.0f, rec.normal.Y + 1.0f, rec.normal.Z + 1.0f));
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return((1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f));
}
}
Vector3 Color(Ray r, HitableList world, int depth)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.001f, float.MaxValue, ref rec))
{
Ray scattered = null;
Vector3 attenuation = new Vector3(0, 0, 0);
if (depth < 50 && rec.mat.scatter(r, rec, ref attenuation, ref scattered))
{
return(attenuation * Color(scattered, world, depth + 1));
}
else
{
return(new Vector3(0, 0, 0));
}
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return((1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f));
}
}