/* * @(#)SimpleVrml97Viewer.java 1.6 98/09/18 14:58:38 * * Copyright (c) 1996-1998 Sun Microsystems, Inc. All Rights Reserved. * * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use, * modify and redistribute this software in source and binary code form, * provided that i) this copyright notice and license appear on all copies of * the software; and ii) Licensee does not utilize the software in a manner * which is disparaging to Sun. * * 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. * * This software is not designed or intended for use in on-line control of * aircraft, air traffic, aircraft navigation or aircraft communications; or in * the design, construction, operation or maintenance of any nuclear * facility. Licensee represents and warrants that it will not use or * redistribute the Software for such purposes. * * @Author: Doug Gehringer * @Author: Rick Goldberg */ import java.applet.Applet; import java.awt.*; import java.awt.event.*; import com.sun.j3d.utils.geometry.ColorCube; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.universe.*; import com.sun.j3d.utils.behaviors.mouse.MouseRotate; import com.sun.j3d.utils.behaviors.mouse.MouseZoom; import com.sun.j3d.utils.behaviors.mouse.MouseTranslate; import javax.media.j3d.*; import javax.vecmath.*; import java.net.URL; import java.net.MalformedURLException; import com.sun.j3d.loaders.vrml97.VrmlLoader; import com.sun.j3d.loaders.Scene; public class SimpleVrml97Viewer extends Applet implements ActionListener { String location; Canvas3D canvas; SimpleUniverse universe; TransformGroup vpTransGroup; VrmlLoader loader; View view; Panel panel; Label label; BranchGroup sceneRoot; TransformGroup examineGroup; BranchGroup sceneGroup; BoundingSphere sceneBounds; DirectionalLight headLight; AmbientLight ambLight; TextField textField; Cursor waitCursor; Cursor handCursor; SimpleVrml97Viewer(String initLocation) { setLayout(new BorderLayout()); canvas = new Canvas3D(null); add("Center",canvas); panel = new Panel(); panel.setLayout(new FlowLayout(FlowLayout.LEFT)); textField = new TextField(initLocation,60); textField.addActionListener(this); label = new Label("Location:"); panel.add(label); panel.add(textField); add("North",panel); waitCursor = new Cursor(Cursor.WAIT_CURSOR); handCursor = new Cursor(Cursor.HAND_CURSOR); universe = new SimpleUniverse(canvas); ViewingPlatform viewingPlatform = universe.getViewingPlatform(); vpTransGroup = viewingPlatform.getViewPlatformTransform(); Viewer viewer = universe.getViewer(); view = viewer.getView(); setupBehavior(); loader = new VrmlLoader(); gotoLocation(initLocation); } public void actionPerformed(ActionEvent ae) { gotoLocation(textField.getText()); } void gotoLocation(String location) { canvas.setCursor(waitCursor); if (sceneGroup != null) { sceneGroup.detach(); } Scene scene = null; try { URL loadUrl = new URL(location); try { // load the scene scene = loader.load(new URL(location)); } catch (Exception e) { System.out.println("Exception loading URL:" + e); } } catch (MalformedURLException badUrl) { // location may be a path name try { // load the scene scene = loader.load(location); } catch (Exception e) { System.out.println("Exception loading file from path:" + e); } } if (scene != null) { // get the scene group sceneGroup = scene.getSceneGroup(); sceneGroup.setCapability(BranchGroup.ALLOW_DETACH); sceneGroup.setCapability(BranchGroup.ALLOW_BOUNDS_READ); // add the scene group to the scene examineGroup.addChild(sceneGroup); // now that the scene group is "live" we can inquire the bounds sceneBounds = (BoundingSphere)sceneGroup.getBounds(); // set up a viewpoint to include the bounds setViewpoint(); } canvas.setCursor(handCursor); } void setViewpoint() { Transform3D viewTrans = new Transform3D(); Transform3D eyeTrans = new Transform3D(); // point the view at the center of the object Point3d center = new Point3d(); sceneBounds.getCenter(center); double radius = sceneBounds.getRadius(); Vector3d temp = new Vector3d(center); viewTrans.set(temp); // pull the eye back far enough to see the whole object double eyeDist = 1.4*radius / Math.tan(view.getFieldOfView() / 2.0); temp.x = 0.0; temp.y = 0.0; temp.z = eyeDist; eyeTrans.set(temp); viewTrans.mul(eyeTrans); // set the view transform vpTransGroup.setTransform(viewTrans); } private void setupBehavior() { sceneRoot = new BranchGroup(); examineGroup = new TransformGroup(); examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND); examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_READ); examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE); examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); sceneRoot.addChild(examineGroup); BoundingSphere behaviorBounds = new BoundingSphere(new Point3d(), Double.MAX_VALUE); MouseRotate mr = new MouseRotate(); mr.setTransformGroup(examineGroup); mr.setSchedulingBounds(behaviorBounds); sceneRoot.addChild(mr); MouseTranslate mt = new MouseTranslate(); mt.setTransformGroup(examineGroup); mt.setSchedulingBounds(behaviorBounds); sceneRoot.addChild(mt); MouseZoom mz = new MouseZoom(); mz.setTransformGroup(examineGroup); mz.setSchedulingBounds(behaviorBounds); sceneRoot.addChild(mz); BoundingSphere lightBounds = new BoundingSphere(new Point3d(), Double.MAX_VALUE); ambLight = new AmbientLight(true, new Color3f(1.0f, 1.0f, 1.0f)); ambLight.setInfluencingBounds(lightBounds); ambLight.setCapability(Light.ALLOW_STATE_WRITE); sceneRoot.addChild(ambLight); headLight = new DirectionalLight(); headLight.setCapability(Light.ALLOW_STATE_WRITE); headLight.setInfluencingBounds(lightBounds); sceneRoot.addChild(headLight); universe.addBranchGraph(sceneRoot); } public static void main(String[] args) { String locString = null; if (args.length == 0) { locString = System.getProperties().getProperty("user.dir") + "/parts/simple.wrl"; } else { if (args.length != 1) { System.out.println("Usage: SimpleVrml97Viewer [pathname|URL]"); System.exit(0); } else { locString = args[0]; } } new MainFrame(new SimpleVrml97Viewer(locString), 780, 780); } }