/** Example program to test ray tracer
 * Extend class version, may be confusing...
 * @author: Phil Gage
 */
public class Example2 {

    static int width = 320, height = 200;   // image size
    static int frames = 1;  // number of animation frames

    // Define scene layout
    static class ExampleWorld extends World {

        ExampleWorld () {

        // Define a light source
        Light light = new Light (
            new Vector3(-100.0, -100.0, -50.0),  // XYZ direction
            new Color (1.0,1.0,1.0));            // RGB color
        add(light);

        // Define a sphere
        Sphere s = new Sphere (
            new Point(0.0, 0.0, 500.0),    // XYZ center
            100.0,                         // radius
            new Color (1.0, 0.0, 0.0));    // RGB color
        add(s);

        // Define a camera, default view (0,0,1) along Z axis
        AbstractCamera camera = new CylindricalCamera (this, width, height);
        add(camera);

        }
    }

    /** Main program for example */
    public static void main (String[] argv) {

        // Define scene and perform raytracing
        World world = new ExampleWorld ();

        // For each frame of animation, animate and ray trace
        // Output file names are frame0.tga, frame1.tga, ...
        for (int frame=0; frame<frames; frame++) {
            world.animate ();
        }
    }

}