PureImmediate.java Source code

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Here is the source code for PureImmediate.java

Source

/*
 *   @(#)PureImmediate.java 1.19 02/10/21 13:53:05
 *
 * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
 * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
 * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
 * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed,licensed or intended
 * for use in the design, construction, operation or maintenance of
 * any nuclear facility.
 */

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;

import javax.media.j3d.Alpha;
import javax.media.j3d.Appearance;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.Geometry;
import javax.media.j3d.GraphicsContext3D;
import javax.media.j3d.Transform3D;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.SimpleUniverse;

/**
 * Pure immediate mode example program. In pure immediate mode, the renderer
 * must be stopped on the Canvas being rendered into. In our example, this is
 * done immediately after the canvas is created. A separate thread is started up
 * to do the immediate mode rendering.
 */
public class PureImmediate extends Applet implements Runnable {

    private Canvas3D canvas;

    private GraphicsContext3D gc = null;

    private Geometry cube = null;

    private Transform3D cmt = new Transform3D();

    // One rotation (2*PI radians) every 6 seconds
    private Alpha rotAlpha = new Alpha(-1, 6000);

    private SimpleUniverse u = null;

    //
    // Renders a single frame by clearing the canvas, drawing the
    // geometry, and swapping the draw and display buffer.
    //
    public void render() {
        if (gc == null) {
            // Set up Graphics context
            gc = canvas.getGraphicsContext3D();
            gc.setAppearance(new Appearance());

            // Set up geometry
            cube = new ColorCube(0.4).getGeometry();
        }

        // Compute angle of rotation based on alpha value
        double angle = rotAlpha.value() * 2.0 * Math.PI;
        cmt.rotY(angle);

        // Render the geometry for this frame
        gc.clear();
        gc.setModelTransform(cmt);
        gc.draw(cube);
        canvas.swap();
    }

    //
    // Run method for our immediate mode rendering thread.
    //
    public void run() {
        System.out.println("PureImmediate.run: starting main loop");
        while (true) {
            render();
            Thread.yield();
        }
    }

    public PureImmediate() {
    }

    //
    // init: create the canvas, stop the renderer,
    // create the universe, and start the drawing thread.
    //
    public void init() {
        setLayout(new BorderLayout());
        GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();

        canvas = new Canvas3D(config);
        canvas.stopRenderer();
        add("Center", canvas);

        // Create the universe and viewing branch
        u = new SimpleUniverse(canvas);

        // This will move the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        u.getViewingPlatform().setNominalViewingTransform();

        // Start a new thread that will continuously render
        new Thread(this).start();
    }

    public void destroy() {
        u.cleanup();
    }

    //
    // The following allows PureImmediate to be run as an application
    // as well as an applet
    //
    public static void main(String[] args) {
        new MainFrame(new PureImmediate(), 256, 256);
    }
}