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.

Program 8.1

Figure 8.14 

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// Much is the same as we have seen before. New sections to support shadows are highlighted. // The imports necessary for lighting, etc., would be included at the start, are the same as before, // and are not shown here. public class Code extends JFrame implements GLEventListener { // variable declarations for rendering programs, buffers, shader sources, etc., would go here. private ImportedModel pyramid = new ImportedModel("pyr.obj"); // define the pyramid private Torus myTorus= new Torus (0.6f, 0.4f, 48); // define the torus private int numPyramidVertices, num Torus Vertices, num TorusIndices; // locations of torus, pyramid, camera, and light private Vector3f torusLoc = new Vector3f(1.6, 0.0, -0.3); private Vector3f pyrLoc = new Vector3f(-1.0, 0.1, 0.3); private Vector3f cameraLoc = new Vector3f(0.0, 0.2, 6.0); private Vector3f lightLoc= new Vector3f(-3.8f, 2.2f, 1.1f); // properties of white light (global and positional) used in this scene private float[] globalAmbient = new float[] { 0.7f, 0.7f, 0.7f, 1.0f};