Java tutorial
/* * @(#)OrientedTest.java 1.10 02/10/21 13:47:43 * * 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.MouseEvent; import java.util.Enumeration; import javax.media.j3d.AmbientLight; import javax.media.j3d.Appearance; import javax.media.j3d.Background; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.Font3D; import javax.media.j3d.FontExtrusion; import javax.media.j3d.Material; import javax.media.j3d.OrientedShape3D; import javax.media.j3d.Text3D; import javax.media.j3d.TextureAttributes; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.WakeupCriterion; import javax.media.j3d.WakeupOnAWTEvent; import javax.vecmath.Color3f; import javax.vecmath.Matrix4d; import javax.vecmath.Point3d; import javax.vecmath.Point3f; import javax.vecmath.Vector3d; import javax.vecmath.Vector3f; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.behaviors.mouse.MouseBehavior; import com.sun.j3d.utils.behaviors.mouse.MouseTranslate; import com.sun.j3d.utils.behaviors.mouse.MouseZoom; import com.sun.j3d.utils.geometry.ColorCube; import com.sun.j3d.utils.geometry.Cone; import com.sun.j3d.utils.geometry.Cylinder; import com.sun.j3d.utils.image.TextureLoader; import com.sun.j3d.utils.universe.SimpleUniverse; import com.sun.j3d.utils.universe.ViewingPlatform; public class OrientedTest extends Applet { // setup font stuff private String fontName = "TestFont"; private String textString = "OrientedShape3D"; float sl = textString.length(); // paths to texture image files private java.net.URL earthImage = null; private java.net.URL stoneImage = null; private SimpleUniverse u = null; public BranchGroup createSceneGraph() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); TransformGroup objScale = new TransformGroup(); Transform3D textMat = new Transform3D(); // Assuming uniform size chars, set scale to fit string in view textMat.setScale(1.2 / sl); objScale.setTransform(textMat); // 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); objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); objRoot.addChild(objTrans); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); Appearance apText = new Appearance(); Material m = new Material(); m.setLightingEnable(true); apText.setMaterial(m); Appearance apEarth = new Appearance(); Material mm = new Material(); mm.setLightingEnable(true); apEarth.setMaterial(mm); Appearance apStone = new Appearance(); apStone.setMaterial(mm); // create 3D text Font3D f3d = new Font3D(new Font(fontName, Font.PLAIN, 2), new FontExtrusion()); Text3D txt = new Text3D(f3d, textString, new Point3f(-sl / 2.0f, 3.0f, 0.0f)); OrientedShape3D textShape = new OrientedShape3D(); textShape.setGeometry(txt); textShape.setAppearance(apText); textShape.setAlignmentAxis(0.0f, 1.0f, 0.0f); objScale.addChild(textShape); // Create a simple shape leaf node, add it to the scene graph. Transform3D cubeMat = new Transform3D(); TransformGroup cubeTrans = new TransformGroup(cubeMat); cubeMat.set(new Vector3d(0.9, 0.0, -1.0)); cubeTrans.setTransform(cubeMat); cubeTrans.addChild(new ColorCube(0.3)); objTrans.addChild(cubeTrans); TextureLoader stoneTex = new TextureLoader(stoneImage, new String("RGB"), this); if (stoneTex != null) apStone.setTexture(stoneTex.getTexture()); TextureAttributes texAttr = new TextureAttributes(); texAttr.setTextureMode(TextureAttributes.MODULATE); apStone.setTextureAttributes(texAttr); Transform3D coneMat = new Transform3D(); TransformGroup coneTrans = new TransformGroup(coneMat); coneMat.set(new Vector3d(0.0, 0.0, 0.0)); coneTrans.setTransform(coneMat); coneTrans.addChild(new Cone(.2f, 0.8f, Cone.GENERATE_NORMALS | Cone.GENERATE_TEXTURE_COORDS, apStone)); objTrans.addChild(coneTrans); TextureLoader earthTex = new TextureLoader(earthImage, new String("RGB"), this); if (earthTex != null) apEarth.setTexture(earthTex.getTexture()); apEarth.setTextureAttributes(texAttr); Transform3D cylinderMat = new Transform3D(); TransformGroup cylinderTrans = new TransformGroup(cylinderMat); cylinderMat.set(new Vector3d(-0.9, 0.5, -1.0)); cylinderTrans.setTransform(cylinderMat); cylinderTrans.addChild( new Cylinder(.35f, 2.0f, Cylinder.GENERATE_NORMALS | Cylinder.GENERATE_TEXTURE_COORDS, apEarth)); objTrans.addChild(cylinderTrans); objTrans.addChild(objScale); // Set up the background Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f); Background bgNode = new Background(bgColor); bgNode.setApplicationBounds(bounds); objRoot.addChild(bgNode); // Set up the ambient light Color3f ambientColor = new Color3f(0.1f, 0.1f, 0.1f); AmbientLight ambientLightNode = new AmbientLight(ambientColor); ambientLightNode.setInfluencingBounds(bounds); objRoot.addChild(ambientLightNode); // Set up the directional lights Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f); Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f); Color3f light2Color = new Color3f(1.0f, 1.0f, 0.9f); Vector3f light2Direction = new Vector3f(-1.0f, -1.0f, -1.0f); DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction); light1.setInfluencingBounds(bounds); objRoot.addChild(light1); DirectionalLight light2 = new DirectionalLight(light2Color, light2Direction); light2.setInfluencingBounds(bounds); objRoot.addChild(light2); apText.setMaterial(mm); // Have Java 3D perform optimizations on this scene graph. objRoot.compile(); return objRoot; } public OrientedTest() { } public OrientedTest(java.net.URL earthURL, java.net.URL stoneURL) { earthImage = earthURL; stoneImage = stoneURL; } public void init() { // the paths to the image files for an applet if (earthImage == null) { try { earthImage = new java.net.URL(getCodeBase().toString() + "/earth.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } } if (stoneImage == null) { try { stoneImage = new java.net.URL(getCodeBase().toString() + "/stone.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } } 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, 4); // add mouse behaviors to ViewingPlatform ViewingPlatform viewingPlatform = u.getViewingPlatform(); // there is a special rotate behavior, so can't use the utility // method MouseRotateY rotate = new MouseRotateY(MouseRotateY.INVERT_INPUT); rotate.setTransformGroup(viewingPlatform.getMultiTransformGroup().getTransformGroup(0)); BranchGroup rotateBG = new BranchGroup(); rotateBG.addChild(rotate); viewingPlatform.addChild(rotateBG); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); rotate.setSchedulingBounds(bounds); MouseZoom zoom = new MouseZoom(c, MouseZoom.INVERT_INPUT); zoom.setTransformGroup(viewingPlatform.getMultiTransformGroup().getTransformGroup(1)); zoom.setSchedulingBounds(bounds); BranchGroup zoomBG = new BranchGroup(); zoomBG.addChild(zoom); viewingPlatform.addChild(zoomBG); MouseTranslate translate = new MouseTranslate(c, MouseTranslate.INVERT_INPUT); translate.setTransformGroup(viewingPlatform.getMultiTransformGroup().getTransformGroup(2)); translate.setSchedulingBounds(bounds); BranchGroup translateBG = new BranchGroup(); translateBG.addChild(translate); viewingPlatform.addChild(translateBG); // 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 OrientedTest to be run as an application // as well as an applet // public static void main(String[] args) { java.net.URL earthURL = null; java.net.URL stoneURL = null; try { // the paths to the image files for an application earthURL = new java.net.URL("file:earth.jpg"); stoneURL = new java.net.URL("file:stone.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } new MainFrame(new OrientedTest(earthURL, stoneURL), 400, 400); } } /** * MouseRotateY is a Java3D behavior object that lets users control the rotation * of an object via a mouse. * <p> * To use this utility, first create a transform group that this rotate behavior * will operate on. Then, <blockquote> * * <pre> * * * MouseRotateY behavior = new MouseRotateY(); * behavior.setTransformGroup(objTrans); * objTrans.addChild(behavior); * behavior.setSchedulingBounds(bounds); * * * </pre> * * </blockquote> The above code will add the rotate behavior to the transform * group. The user can rotate any object attached to the objTrans. */ class MouseRotateY extends MouseBehavior { double y_angle; double y_factor; /** * Creates a rotate behavior given the transform group. * * @param transformGroup * The transformGroup to operate on. */ public MouseRotateY(TransformGroup transformGroup) { super(transformGroup); } /** * Creates a default mouse rotate behavior. */ public MouseRotateY() { super(0); } /** * Creates a rotate behavior. Note that this behavior still needs a * transform group to work on (use setTransformGroup(tg)) and the transform * group must add this behavior. * * @param flags * interesting flags (wakeup conditions). */ public MouseRotateY(int flags) { super(flags); } public void initialize() { super.initialize(); y_angle = 0; y_factor = .03; if ((flags & INVERT_INPUT) == INVERT_INPUT) { invert = true; y_factor *= -1; } } public double getYFactor() { return y_factor; } public void setFactor(double factor) { y_factor = factor; } public void processStimulus(Enumeration criteria) { WakeupCriterion wakeup; AWTEvent[] event; int id; int dx; while (criteria.hasMoreElements()) { wakeup = (WakeupCriterion) criteria.nextElement(); if (wakeup instanceof WakeupOnAWTEvent) { event = ((WakeupOnAWTEvent) wakeup).getAWTEvent(); for (int i = 0; i < event.length; i++) { processMouseEvent((MouseEvent) event[i]); if (((buttonPress) && ((flags & MANUAL_WAKEUP) == 0)) || ((wakeUp) && ((flags & MANUAL_WAKEUP) != 0))) { id = event[i].getID(); if ((id == MouseEvent.MOUSE_DRAGGED) && !((MouseEvent) event[i]).isMetaDown() && !((MouseEvent) event[i]).isAltDown()) { x = ((MouseEvent) event[i]).getX(); dx = x - x_last; if (!reset) { y_angle = dx * y_factor; transformY.rotY(y_angle); transformGroup.getTransform(currXform); //Vector3d translation = new Vector3d(); //Matrix3f rotation = new Matrix3f(); Matrix4d mat = new Matrix4d(); // Remember old matrix currXform.get(mat); // Translate to origin currXform.setTranslation(new Vector3d(0.0, 0.0, 0.0)); if (invert) { currXform.mul(currXform, transformX); currXform.mul(currXform, transformY); } else { currXform.mul(transformX, currXform); currXform.mul(transformY, currXform); } // Set old translation back Vector3d translation = new Vector3d(mat.m03, mat.m13, mat.m23); currXform.setTranslation(translation); // Update xform transformGroup.setTransform(currXform); } else { reset = false; } x_last = x; } else if (id == MouseEvent.MOUSE_PRESSED) { x_last = ((MouseEvent) event[i]).getX(); } } } } } wakeupOn(mouseCriterion); } }