3D PICKING DEMO

Left click on an object to change its color and start it spinning. Click again to stop it. Right click to switch between a perspective and a parallel view.

This example also demonstrates integration of 2-D and 3-D, with rendered text images over rendered geometry, over scrolling rendered bitmaps.

Since both the geometry and camera transformations are changing significantly, this serves as a useful test case for 3-D picking.