IRIX 6.5 Applications 2004 May/SGI IRIX 6.5 Applications 2004 May.iso/dist/java3d.idb/usr/demos/java/j3d/programs/examples/SphereMotion/SphereMotion.java.z/SphereMotion.java

Java Source | 2003-08-08 | 9.6 KB | 297 lines

/*
 *    @(#)SphereMotion.java 1.38 02/10/21 13:55:06
 *
 * 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.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.util.Enumeration;

public class SphereMotion extends Applet {

    // Constants for type of light to use
    private static final int DIRECTIONAL_LIGHT = 0;
    private static final int POINT_LIGHT = 1;
    private static final int SPOT_LIGHT = 2;

    // Flag indicates type of lights: directional, point, or spot
    // lights.  This flag is set based on command line argument
    private static int lightType = POINT_LIGHT;

    private SimpleUniverse u = null;

    public BranchGroup createSceneGraph(SimpleUniverse u) {
    Color3f eColor    = new Color3f(0.0f, 0.0f, 0.0f);
    Color3f sColor    = new Color3f(1.0f, 1.0f, 1.0f);
    Color3f objColor  = new Color3f(0.6f, 0.6f, 0.6f);
    Color3f lColor1   = new Color3f(1.0f, 0.0f, 0.0f);
    Color3f lColor2   = new Color3f(0.0f, 1.0f, 0.0f);
    Color3f alColor   = new Color3f(0.2f, 0.2f, 0.2f);
    Color3f bgColor   = new Color3f(0.05f, 0.05f, 0.2f);

    Transform3D t;

    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();

        // Create a Transformgroup to scale all objects so they
        // appear in the scene.
        TransformGroup objScale = new TransformGroup();
        Transform3D t3d = new Transform3D();
        t3d.setScale(0.4);
        objScale.setTransform(t3d);
        objRoot.addChild(objScale);

    // Create a bounds for the background and lights
    BoundingSphere bounds =
        new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

    // Set up the background
    Background bg = new Background(bgColor);
    bg.setApplicationBounds(bounds);
    objScale.addChild(bg);

    // Create a Sphere object, generate one copy of the sphere,
    // and add it into the scene graph.
    Material m = new Material(objColor, eColor, objColor, sColor, 100.0f);
    Appearance a = new Appearance();
    m.setLightingEnable(true);
    a.setMaterial(m);
    Sphere sph = new Sphere(1.0f, Sphere.GENERATE_NORMALS, 80, a);
    objScale.addChild(sph);

    // Create the transform group node for the each light and initialize
    // it to the identity.  Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime.  Add them to the root
    // of the subgraph.
    TransformGroup l1RotTrans = new TransformGroup();
    l1RotTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objScale.addChild(l1RotTrans);

    TransformGroup l2RotTrans = new TransformGroup();
    l2RotTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objScale.addChild(l2RotTrans);

    // Create transformations for the positional lights
    t = new Transform3D();
    Vector3d lPos1 =  new Vector3d(0.0, 0.0, 2.0);
    t.set(lPos1);
    TransformGroup l1Trans = new TransformGroup(t);
    l1RotTrans.addChild(l1Trans);

    t = new Transform3D();
    Vector3d lPos2 = new Vector3d(0.5, 0.8, 2.0);
    t.set(lPos2);
    TransformGroup l2Trans = new TransformGroup(t);
    l2RotTrans.addChild(l2Trans);

    // Create Geometry for point lights
    ColoringAttributes caL1 = new ColoringAttributes();
    ColoringAttributes caL2 = new ColoringAttributes();
    caL1.setColor(lColor1);
    caL2.setColor(lColor2);
    Appearance appL1 = new Appearance();
    Appearance appL2 = new Appearance();
    appL1.setColoringAttributes(caL1);
    appL2.setColoringAttributes(caL2);
    l1Trans.addChild(new Sphere(0.05f, appL1));
    l2Trans.addChild(new Sphere(0.05f, appL2));

    // Create lights
    AmbientLight aLgt = new AmbientLight(alColor);

    Light lgt1 = null;
    Light lgt2 = null;

    Point3f lPoint  = new Point3f(0.0f, 0.0f, 0.0f);
    Point3f atten = new Point3f(1.0f, 0.0f, 0.0f);
    Vector3f lDirect1 = new Vector3f(lPos1);
    Vector3f lDirect2 = new Vector3f(lPos2);
    lDirect1.negate();
    lDirect2.negate();

    switch (lightType) {
    case DIRECTIONAL_LIGHT:
        lgt1 = new DirectionalLight(lColor1, lDirect1);
        lgt2 = new DirectionalLight(lColor2, lDirect2);
        break;
    case POINT_LIGHT:
        lgt1 = new PointLight(lColor1, lPoint, atten);
        lgt2 = new PointLight(lColor2, lPoint, atten);
        break;
    case SPOT_LIGHT:
        lgt1 = new SpotLight(lColor1, lPoint, atten, lDirect1,
                 25.0f * (float)Math.PI / 180.0f, 10.0f);
        lgt2 = new SpotLight(lColor2, lPoint, atten, lDirect2,
                 25.0f * (float)Math.PI / 180.0f, 10.0f);
        break;
    }

    // Set the influencing bounds
    aLgt.setInfluencingBounds(bounds);
    lgt1.setInfluencingBounds(bounds);
    lgt2.setInfluencingBounds(bounds);

    // Add the lights into the scene graph
    objScale.addChild(aLgt);
    l1Trans.addChild(lgt1);
    l2Trans.addChild(lgt2);

    // Create a new Behavior object that will perform the desired
    // operation on the specified transform object and add it into the
    // scene graph.
    Transform3D yAxis = new Transform3D();
    Alpha rotor1Alpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
                     0, 0,
                     4000, 0, 0,
                     0, 0, 0);
    RotationInterpolator rotator1 =
        new RotationInterpolator(rotor1Alpha,
                     l1RotTrans,
                     yAxis,
                     0.0f, (float) Math.PI*2.0f);
    rotator1.setSchedulingBounds(bounds);
    l1RotTrans.addChild(rotator1);

    // Create a new Behavior object that will perform the desired
    // operation on the specified transform object and add it into the
    // scene graph.
    Alpha rotor2Alpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
                     0, 0,
                     1000, 0, 0,
                     0, 0, 0);
    RotationInterpolator rotator2 =
        new RotationInterpolator(rotor2Alpha,
                     l2RotTrans,
                     yAxis,
                     0.0f, 0.0f);
    bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
    rotator2.setSchedulingBounds(bounds);
    l2RotTrans.addChild(rotator2);

    // Create a position interpolator and attach it to the view
    // platform
    TransformGroup vpTrans =
        u.getViewingPlatform().getViewPlatformTransform();
    Transform3D axisOfTranslation = new Transform3D();
    Alpha transAlpha = new Alpha(-1,
                      Alpha.INCREASING_ENABLE |
                      Alpha.DECREASING_ENABLE,
                      0, 0,
                      5000, 0, 0,
                      5000, 0, 0);
    axisOfTranslation.rotY(-Math.PI/2.0);
    PositionInterpolator translator =
        new PositionInterpolator(transAlpha,
                     vpTrans,
                     axisOfTranslation,
                     2.0f, 3.5f);
    translator.setSchedulingBounds(bounds);
    objScale.addChild(translator);

        // Let Java 3D perform optimizations on this scene graph.
        objRoot.compile();

    return objRoot;
    }

    public SphereMotion() {
    }

    public void init() {
    setLayout(new BorderLayout());
        GraphicsConfiguration config =
           SimpleUniverse.getPreferredConfiguration();

        Canvas3D c = new Canvas3D(config);
    add("Center", c);

    u = new SimpleUniverse(c);
    BranchGroup scene = createSceneGraph(u);

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

    u.addBranchGraph(scene);
    }

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

    //
    // The following allows SphereMotion to be run as an application
    // as well as an applet
    //
    public static void main(String[] args) {
        // Parse the Input Arguments
    String usage = "Usage: java SphereMotion [-point | -spot | -dir]";
        for (int i = 0; i < args.length; i++) {
            if (args[i].startsWith("-")) {
                if (args[i].equals("-point")) {
            System.out.println("Using point lights");
                    lightType = POINT_LIGHT;
                }
        else if (args[i].equals("-spot")) {
            System.out.println("Using spot lights");
                    lightType = SPOT_LIGHT;
                }
        else if (args[i].equals("-dir")) {
            System.out.println("Using directional lights");
                    lightType = DIRECTIONAL_LIGHT;
                }
        else {
            System.out.println(usage);
                    System.exit(0);
                }
            }
        else {
        System.out.println(usage);
        System.exit(0);
        }
        }

    new MainFrame(new SphereMotion(), 700, 700);
    }
}