Modify Program 4.4 so that the “sun,” “planet,” and “moon” are textured. You may continue to use the shapes already present, and you may use any texture you like. This will require you to build texture coordinates for the cube.

Program 4.4

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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);