Java tutorial
/* * @(#)Text2DTest.java 1.11 02/10/21 13:55:56 * * 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.AWTEvent; import java.awt.BorderLayout; import java.awt.Font; import java.awt.GraphicsConfiguration; import java.awt.event.KeyEvent; import java.util.Enumeration; import javax.media.j3d.Alpha; import javax.media.j3d.Appearance; import javax.media.j3d.Behavior; import javax.media.j3d.BoundingSphere; import javax.media.j3d.Bounds; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.PolygonAttributes; import javax.media.j3d.RotationInterpolator; import javax.media.j3d.Shape3D; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.WakeupCondition; import javax.media.j3d.WakeupCriterion; import javax.media.j3d.WakeupOnAWTEvent; import javax.media.j3d.WakeupOr; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3f; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.geometry.Text2D; import com.sun.j3d.utils.universe.SimpleUniverse; public class Text2DTest extends Applet { private SimpleUniverse u = null; public BranchGroup createSceneGraph() { // 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 the transform group node and initialize it to the // identity. Enable the TRANSFORM_WRITE capability so that // our behavior code can modify it at runtime. Add it to the // root of the subgraph. TransformGroup objTrans = new TransformGroup(); objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); TransformGroup textTranslationGroup; Transform3D textTranslation; float yPos = -.5f; Shape3D textObject = new Text2D("Rotating Yellow Text", new Color3f(1f, 1f, 0f), "Serif", 60, Font.BOLD); Appearance app = textObject.getAppearance(); PolygonAttributes pa = app.getPolygonAttributes(); if (pa == null) pa = new PolygonAttributes(); pa.setCullFace(PolygonAttributes.CULL_NONE); if (app.getPolygonAttributes() == null) app.setPolygonAttributes(pa); objTrans.addChild(textObject); textTranslation = new Transform3D(); textTranslation.setTranslation(new Vector3f(0f, yPos, 0f)); textTranslationGroup = new TransformGroup(textTranslation); textTranslationGroup.addChild(objTrans); objScale.addChild(textTranslationGroup); yPos += .5f; /* Blue 40point text */ textObject = new Text2D("Blue 40point Text", new Color3f(0f, 0f, 1f), "Serif", 40, Font.BOLD); textTranslation = new Transform3D(); textTranslation.setTranslation(new Vector3f(0f, yPos, 0f)); textTranslationGroup = new TransformGroup(textTranslation); textTranslationGroup.addChild(textObject); objScale.addChild(textTranslationGroup); yPos += .5f; /* Green italic text */ textObject = new Text2D("Green Italic Text", new Color3f(0f, 1f, 0f), "Serif", 70, Font.ITALIC); textTranslation = new Transform3D(); textTranslation.setTranslation(new Vector3f(0f, yPos, 0f)); textTranslationGroup = new TransformGroup(textTranslation); textTranslationGroup.addChild(textObject); objScale.addChild(textTranslationGroup); yPos += .5f; // 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 rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0, 4000, 0, 0, 0, 0, 0); RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, objTrans, yAxis, 0.0f, (float) Math.PI * 2.0f); rotator.setSchedulingBounds(bounds); objTrans.addChild(rotator); return objRoot; } public Text2DTest() { } public void init() { setLayout(new BorderLayout()); GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration(); Canvas3D c = new Canvas3D(config); add("Center", c); // Create a simple scene and attach it to the virtual universe BranchGroup scene = createSceneGraph(); u = new SimpleUniverse(c); MoverBehavior navigator = new MoverBehavior(u.getViewingPlatform().getViewPlatformTransform()); scene.addChild(navigator); // Have Java 3D perform optimizations on this scene graph. scene.compile(); // 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 HelloUniverse to be run as an application // as well as an applet // public static void main(String[] args) { new MainFrame(new Text2DTest(), 256, 256); } } // Mover behavior class - used to allow viewer to move using arrow keys class MoverBehavior extends Behavior { WakeupOnAWTEvent w1 = new WakeupOnAWTEvent(KeyEvent.KEY_PRESSED); WakeupCriterion[] w2 = { w1 }; WakeupCondition w = new WakeupOr(w2); TransformGroup viewTransformGroup; double rotation = 0.0; // holds current rotation radians public void initialize() { // Establish initial wakeup criteria wakeupOn(w); } /** * Override Behavior's stimulus method to handle the event. */ public void processStimulus(Enumeration criteria) { WakeupOnAWTEvent ev; WakeupCriterion genericEvt; AWTEvent[] events; while (criteria.hasMoreElements()) { genericEvt = (WakeupCriterion) criteria.nextElement(); if (genericEvt instanceof WakeupOnAWTEvent) { ev = (WakeupOnAWTEvent) genericEvt; events = ev.getAWTEvent(); processManualEvent(events); } } // Set wakeup criteria for next time wakeupOn(w); } /** * Process a keyboard event to move or rotate the viewer. */ void processManualEvent(AWTEvent[] events) { for (int i = 0; i < events.length; ++i) { if (events[i] instanceof KeyEvent) { KeyEvent event = (KeyEvent) events[i]; if (event.getKeyCode() == KeyEvent.VK_EQUALS) { continue; } Transform3D t = new Transform3D(); viewTransformGroup.getTransform(t); Vector3f viewDir = new Vector3f(0f, 0f, -1f); Vector3f translation = new Vector3f(); t.get(translation); t.transform(viewDir); if (event.getKeyCode() == KeyEvent.VK_UP) { translation.x += viewDir.x; translation.y += viewDir.y; translation.z += viewDir.z; } else if (event.getKeyCode() == KeyEvent.VK_DOWN) { translation.x -= viewDir.x; translation.y -= viewDir.y; translation.z -= viewDir.z; } else if (event.getKeyCode() == KeyEvent.VK_RIGHT) { rotation += -.1; } else if (event.getKeyCode() == KeyEvent.VK_LEFT) { rotation += .1; } t.rotY(rotation); t.setTranslation(translation); viewTransformGroup.setTransform(t); } } } /** * Constructor */ public MoverBehavior(TransformGroup trans) { viewTransformGroup = trans; Bounds bound = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 10000.0); this.setSchedulingBounds(bound); } }