public ShadowRay MakeBackgroundShadowRay(Hit from, Vector3 direction)
{
var ray = SpawnRay(from, direction);
return(new ShadowRay(ray, float.MaxValue));
}
Vector3 OffsetPoint(Hit from, Vector3 dir)
{
float sign = Vector3.Dot(dir, from.Normal) < 0.0f ? -1.0f : 1.0f;
return(from.Position + sign * from.ErrorOffset * from.Normal);
}
public bool IsOccluded(Hit from, Hit to)
{
var ray = MakeShadowRay(from, to);
return(IsOccluded(ray));
}
public bool IsOccluded(Hit from, Vector3 target)
{
var ray = MakeShadowRay(from, target);
return(IsOccluded(ray));
}
/// <summary>
/// Convenience wrapper that calls <see cref="MakeBackgroundShadowRay"/> and then
/// <see cref="IsOccluded(ShadowRay)"/>.
/// </summary>
/// <returns>True if the shadow ray is occluded</returns>
public bool LeavesScene(Hit from, Vector3 direction)
{
var ray = MakeBackgroundShadowRay(from, direction);
return(!IsOccluded(ray));
}