static public ConvexPolygon GetIntersection(this ConvexPolygon item, Plane2 plane)
{
ConvexPolygon intersection = new ConvexPolygon();
intersection.AddVertexs(item.GetVertexs().Narrow(v => plane.IsInside(v)));
Vector2 point;
foreach (Face face in item.GetFaces())
{
if (face.IsIntersecting(plane, out point))
{
intersection.AddVertex(point);
}
}
return(intersection);
}
static public ConvexPolygon GetIntersection(this ConvexPolygon item, ConvexPolygon other)
{
ConvexPolygon intersection = new ConvexPolygon();
intersection.AddVertexs(item.GetVertexs().Narrow(v => other.IsPointWithin(v)));
intersection.AddVertexs(other.GetVertexs().Narrow(v => item.IsPointWithin(v)));
Vector2 point;
foreach (Face face1 in item.GetFaces())
{
foreach (Face face2 in other.GetFaces())
{
if (face1.IsIntersecting(face2, out point))
{
intersection.AddVertex(point);
}
}
}
return(intersection);
}
static public void AddVertexs(this ConvexPolygon item, IEnumerable <Vector2> vertexs)
{
vertexs.Process(v => item.AddVertex(v));
}