StreamGeometry combine

Question

I have complex StreamGeometry and I want to clip it. Unfortunately, it looks like StreamGeometry doesn\'t supports combine.

Here is a

Answer 1

Solution is simple: do not use StreamGeometry.

To example, this will work (using PathGeometry instead):

var clip = new RectangleGeometry(new Rect(50, 50, 10, 10));
var geometry = new PathGeometry(new[] { new PathFigure(new Point(0, 0), new[] {
    new LineSegment(new Point(0, 100), true),
    new LineSegment(new Point(100, 100), true),
    new LineSegment(new Point(100, 0), true),
}, true) });
path.Data = Geometry.Combine(clip, geometry, GeometryCombineMode.Intersect, null);

Result:

Very important!

It looks like UIElement.Clip still render invisible parts (mayhap only with StreamGeometry) ! Never use it! Clip geometry before assigning it.