public override Point[] Intersect(ShapeGeometry other)
{
switch (other)
{
case LineGeometry line:
return(IntersectionHelper.LineCircleIntersection(line, this));
case CircleGeometry circle:
return(IntersectionHelper.CircleCircleIntersection(this, circle));
case PolygonGeometry polygon:
return(IntersectionHelper.GeometryPolygonIntersection(this, polygon));
default:
return(new Point[0]);
}
}
public static Point[] GeometryPolygonIntersection(ShapeGeometry geometry, PolygonGeometry polygon)
{
if (geometry == null || polygon == null)
{
return(null);
}
if (!geometry.Bounds.IntersectsWith(polygon.Bounds))
{
return(new Point[0]);
}
LineGeometry[] edges = polygon.Edges;
Point[] intersections = null;
foreach (LineGeometry edge in edges)
{
intersections = intersections == null
? geometry.Intersect(edge)
: intersections.Union(geometry.Intersect(edge)).ToArray();
}
return(intersections);
}
public abstract Point[] Intersect(ShapeGeometry other);