public SwitchingGraphic Clone()
        {
            var starting_vertex_c = new VertexPositionColor[StartingVertex.Length];

            for (var i = 0; i < StartingVertex.Length; i++)
            {
                starting_vertex_c[i] = StartingVertex[i];
            }

            var ending_vertex_c = new VertexPositionColor[EndingVertex.Length];

            for (var i = 0; i < EndingVertex.Length; i++)
            {
                ending_vertex_c[i] = EndingVertex[i];
            }

            return(new SwitchingGraphic(starting_vertex_c, ending_vertex_c)
            {
                color = color.Clone(true),
                Progress = Progress.Clone(true)
            });
        }