private void RenderBoundingBox(BoundingBox boundingBox)
        {
            GL.Enable(EnableCap.PolygonOffsetLine);
            GL.PolygonOffset(15.0f, 100.0f);
            GL.MatrixMode(MatrixMode.Modelview);
            GL.LoadMatrix(cam.ViewMatrix.GetInvertedValues());
            GL.MatrixMode(MatrixMode.Projection);
            GL.LoadMatrix(cam.ProjectionMatrix.GetInvertedValues());
            GL.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Line);

            GL.LineWidth(1.5f);
            GL.Begin(PrimitiveType.Triangles);

            GL.Color3(1.0f, 0.0f, 0.0f);
            RenderUtil.RenderBoundingBox(boundingBox);


            GL.End();
            GL.Disable(EnableCap.PolygonOffsetLine);
        }