Let's cover an example of this technique in action:
- Open the ch08_01_picking.html file using your browser. You will see a screen similar to this:
- Here, you have a set of objects, each one of which has a unique diffuse color property. As was the case in previous examples, you can move the camera around the scene. Also, note that the cube has a texture and that the flat disk is translucent. As you may expect, the code in the draw function handles textures, coordinates, and also transparencies, so it looks a bit more complex than before (you can check it out in the source code). This is a more realistic draw function. In a real application, you will have to handle these cases.
- Click on the sphere and drag it around the scene. Notice that the object becomes translucent. Also, note that the displacement occurs along the axis of the camera. To make...
