Modify Program 4.4 so that the “sun,” “planet,” and “moon” are textured spheres, such as the ones shown in Figure 4.11.

Program 4.4Figure 4.11

private Matrix4fStack mvStack = new Matrix4fStack(5); public void display(GLAutoDrawable drawable) { // setup of background, depth buffer, rendering program, and proj matrices unchanged tf = elapsed Time/1000.0; // time factor, as before // push view matrix onto the stack mvStack.pushMatrix(); mvStack.translate(-cameraX, // -cameraY, -cameraZ); pyramid== sun mvStack.pushMatrix(); mvStack translate (0.0f, 0.0f, 0.0f); // sun's position // sun's rotation on its axis mvStack.pushMatrix(); mvStack.rotate((float)tf, 1.0f, 0.0f, 0.0f); gl.glUniformMatrix4fv(mvLoc, 1, false, mvStack.get(vals)); gl.glBindBuffer(GL_ARRAY_BUFFER, vbo[1]); gl.glVertexAttribPointer(0, 3, GL_FLOAT, false, 0, 0); gl.glEnable VertexAttribArray(0); gl.glEnable(GL_DEPTH_TEST);