private bool ChildContains(RTObject child, RTObject obj)
{
if (child.Equals(obj))
{
return(true);
}
var group = child as Group;
if (group != null)
{
if (group.Contains(obj))
{
return(true);
}
}
var csg = child as CSG;
if (csg != null)
{
return(ChildContains(csg.Left, obj) || ChildContains(csg.Right, obj));
}
return(false);
}
public bool IsShadowed(RTObject obj, Computations comps, Point lightPosition, Point point)
{
bool isShadowed = false;
var v = new Vector(lightPosition - point);
var distance = v.Magnitude;
var direction = v.Normalize;
var r = new Ray(point, direction);
var intersections = Intersect(r);
var h = intersections.Hit;
if ((h != null) && (h.t < distance) && (h.t > MathHelper.Epsilon))
{
var dN = obj is Triangle?direction.Dot(comps.NormalVector) : -1;
if (!obj.Equals(h.Object) && h.Object.HasShadow && (dN <= 0))
{
isShadowed = true;
}
}
return(isShadowed);
}
