CSharpGL.Scene.RenderPickableObject C# (CSharp) Method

        private void RenderPickableObject(SceneObject sceneObject, RenderEventArgs arg, ref  uint renderedVertexCount, List<IPickable> pickedRendererList)
        {
            if ((sceneObject == null) || (!sceneObject.Enabled)) { return; }

            // global switches on.
            GLState[] switchArray = sceneObject.GroupStateList.ToArray();
            for (int i = 0; i < switchArray.Length; i++)
            {
                switchArray[i].On();
            }
            // render self.
            var pickable = sceneObject.Renderer as IPickable;
            if ((pickable != null) && (sceneObject.Renderer.Enabled))
            {
                pickable.PickingBaseId = renderedVertexCount;
                pickable.Render4Picking(arg);
                uint rendered = renderedVertexCount + pickable.GetVertexCount();
                if (renderedVertexCount <= rendered)
                {
                    renderedVertexCount = rendered;
                }
                else
                {
                    throw new Exception(string.Format(
                        "Too many geometries({0} + {1} > {2}) for color coded picking.",
                            renderedVertexCount, pickable.GetVertexCount(), uint.MaxValue));
                }

                pickedRendererList.Add(pickable);
            }
            // render children.
            {
                SceneObject[] array = sceneObject.Children.ToArray();
                foreach (SceneObject child in array)
                {
                    RenderPickableObject(child, arg, ref renderedVertexCount, pickedRendererList);
                }
            }
            // global switches off.
            for (int i = switchArray.Length - 1; i >= 0; i--)
            {
                switchArray[i].Off();
            }
        }