public Polygon2D GenerateShadow(Polygon2D poly, float sunDirection)
{
Polygon2D convexHull = new Polygon2D();
foreach (Vector2D p in poly.pointsList)
{
Vector2D vA = p.Copy();
vA.Push(sunDirection, height);
convexHull.pointsList.Add(vA);
convexHull.pointsList.Add(p);
}
convexHull.pointsList = Math2D.GetConvexHull(convexHull.pointsList);
return(convexHull);
}
static public Polygon2 GenerateShadow(Polygon2 poly, float sunDirection, float height)
{
Polygon2D convexHull = new Polygon2D();
Vector2D vA;
sunDirection = -sunDirection;
foreach (Vector2 p in poly.points)
{
vA = new Vector2D(p);
vA.Push(sunDirection, height);
convexHull.pointsList.Add(vA);
convexHull.pointsList.Add(new Vector2D(p));
}
convexHull.pointsList = Math2D.GetConvexHull(convexHull.pointsList);
return(new Polygon2(convexHull));
}