Editor-only class for easy editing of collision polygons. Editor-only class. This is not present when running the game. It's used in the editor to properly edit and position collision shapes in [CollisionObject2D]. This is not accessible from regular code. This class is for editing custom shape polygons. Return whether the polygon is a [ConvexPolygonShape2D] ([code]build_mode==0[/code]), or a [ConcavePolygonShape2D] ([code]build_mode==1[/code]). Return the list of points that define the polygon. Set whether the polygon is to be a [ConvexPolygonShape2D] ([code]build_mode==0[/code]), or a [ConcavePolygonShape2D] ([code]build_mode==1[/code]). Set the array of points forming the polygon. When editing the point list via the editor, depending on [method get_build_mode], it has to be a list of points (for [code]build_mode==0[/code]), or a list of lines (for [code]build_mode==1[/code]). In the second case, the even elements of the array define the start point of the line, and the odd elements the end point.