CSharpGL.Scene.Render4Picking C# (CSharp) Method

        internal List<IPickable> Render4Picking(RenderEventArgs arg)
        {
            arg.UsingViewPort.On();

            // record clear color
            var originalClearColor = new float[4];
            OpenGL.GetFloat(GetTarget.ColorClearValue, originalClearColor);

            // white color means nothing picked.
            OpenGL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
            OpenGL.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT | OpenGL.GL_STENCIL_BUFFER_BIT);

            // restore clear color
            OpenGL.glClearColor(originalClearColor[0], originalClearColor[1], originalClearColor[2], originalClearColor[3]);

            uint renderedVertexCount = 0;
            var pickedRendererList = new List<IPickable>();
            RenderPickableObject(this.rootObject, arg, ref renderedVertexCount, pickedRendererList);

            OpenGL.Flush();

            arg.UsingViewPort.Off();

            return pickedRendererList;
        }

        private void RenderColorCoded(Scene scene, Rectangle clientRectangle, PickingGeometryType pickingGeometryType)
        {
            var color = new vec4(1, 1, 1, 1);

            OpenGL.glClearColor(color.x, color.y, color.z, color.w);

            OpenGL.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT | OpenGL.GL_STENCIL_BUFFER_BIT);

            var arg = new RenderEventArgs(clientRectangle, this, pickingGeometryType);
            // render objects.
            // Render all PickableRenderers for color-coded picking.
            List <IPickable> pickableRendererList = scene.Render4Picking(arg);

            //// render regular UI.
            //this.RootUI.Render(arg);

            //// render cursor.
            //UICursor cursor = this.Cursor;
            //if (cursor != null && cursor.Enabled)
            //{
            //    cursor.UpdatePosition(mousePosition);
            //    this.rootCursor.Render(arg);
            //}
        }