1. (PROJECT) Modify Program 8.1 so that the light can be positioned by moving the mouse, similar to Exercise 7.1. You will probably notice that some lighting positions exhibit shadow artifacts, while...

1.(PROJECT)
Modify Program 8.1 so that the
light
can be positioned by moving the mouse, similar to Exercise 7.1. You will probably notice that some lighting positions exhibit shadow artifacts, while others look fine. 2.
(PROJECT)
Add animation to Program 8.1, such that either the objects or the light (or both) move around on their own—such as one revolving around the other. The shadow effects will be more pronounced if you add a ground plane to the scene, such as the one illustrated in Figure 8.14.