/* * @(#)Bboard.java 1.7 00/03/31 14:30:28 * * Copyright (c) 1996-2000 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. */ import java.applet.Applet; import java.awt.*; import java.awt.event.*; import com.sun.j3d.utils.image.TextureLoader; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.geometry.*; import com.sun.j3d.utils.universe.*; import javax.media.j3d.*; import javax.vecmath.*; import com.sun.j3d.utils.behaviors.mouse.*; public class Bboard extends Applet implements ActionListener { // setup font stuff private String fontName = "TestFont"; private String textString = "Billboard"; float sl = textString.length(); // paths to texture image files private java.net.URL earthImage = null; private java.net.URL stoneImage = null; private BranchGroup bbBranch; private TransformGroup objScale; private SimpleUniverse universe; private boolean renderOn = true; public BranchGroup createSceneGraph() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); objScale = new TransformGroup(); objScale.setCapability(objScale.ALLOW_CHILDREN_WRITE); objScale.setCapability(objScale.ALLOW_CHILDREN_EXTEND); 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), Double.MAX_VALUE); //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)); Shape3D textShape = new Shape3D(); textShape.setGeometry(txt); textShape.setAppearance(apText); // The following 3 sections replace the Y-axis billboard with a local Z-axis // billboard. First, the text is rotated to a local Z-axis. Then, a billboard // is placed to rotate around the local Z-axis. The local system is then // rotated back so that it's z-axis corresponds to the world Y-axis. // The text is laying in the "x-y" plane, at y=3 // Rotate the text in a coord system where the y-axis is now the Z-axis Transform3D textLocalXform = new Transform3D(); textLocalXform.rotX(-Math.toRadians(90f)); TransformGroup textLocal = new TransformGroup(textLocalXform); textLocal.addChild(textShape); // Now, a billboard transform group about the local z-axis TransformGroup bbTransZ = new TransformGroup(); bbTransZ.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); bbTransZ.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); bbTransZ.addChild(textLocal); Billboard bboardZ = new Billboard( bbTransZ ); double D = 0.001; // works fine //double D = 0.0; // broken bboardZ.setAlignmentAxis( 0f, (float)D, (float)Math.sqrt(1 - D*D) ); bboardZ.setSchedulingBounds( bounds ); // Another transform to move the billboard local Z to match the "world" Y axis Transform3D localToWorldXform = new Transform3D(); localToWorldXform.rotX(Math.toRadians(90f)); TransformGroup localToWorld = new TransformGroup(localToWorldXform); localToWorld.addChild(bbTransZ); localToWorld.addChild(bboardZ); // Place the billboard in a branch. bbBranch = new BranchGroup(); bbBranch.setCapability(BranchGroup.ALLOW_DETACH); bbBranch.addChild(localToWorld); objScale.addChild(bbBranch); // The above code SHOULD have the same effect as the below code. /* // Using billboard behavior on text3d TransformGroup bbTransY = new TransformGroup(); bbTransY.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); bbTransY.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); Billboard bboardY = new Billboard( bbTransY ); objTrans.addChild( bboardY ); bboardY.setSchedulingBounds( bounds ); bboardY.setAlignmentAxis( 0.0f, 1.0f, 0.0f); objScale.addChild( bbTransY ); bbTransY.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(4.0f, -7.0f, -12.0f); Color3f light2Color = new Color3f(0.3f, 0.3f, 0.4f); Vector3f light2Direction = new Vector3f(-6.0f, -2.0f, -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); // Create the rotate behavior node MouseRotateY behavior = new MouseRotateY(); behavior.setTransformGroup(objTrans); objTrans.addChild(behavior); behavior.setSchedulingBounds(bounds); // Create the zoom behavior node MouseZoom behavior2 = new MouseZoom(); behavior2.setTransformGroup(objTrans); objTrans.addChild(behavior2); behavior2.setSchedulingBounds(bounds); // Create the translate behavior node MouseTranslate behavior3 = new MouseTranslate(); behavior3.setTransformGroup(objTrans); objTrans.addChild(behavior3); behavior3.setSchedulingBounds(bounds); // Have Java 3D perform optimizations on this scene graph. objRoot.compile(); return objRoot; } public Bboard() { } public Bboard(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() + "../images/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() + "../images/stone.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } } setLayout(new BorderLayout()); GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration(); Canvas3D canvas = new Canvas3D(config); add("Center", canvas); // Add a button Button but = new Button("Toggle View Enabled"); but.addActionListener(this); add("South", but); // Create a simple scene and attach it to the virtual universe BranchGroup scene = createSceneGraph(); universe = new SimpleUniverse(canvas); // This will move the ViewPlatform back a bit so the // objects in the scene can be viewed. universe.getViewingPlatform().setNominalViewingTransform(); universe.addBranchGraph(scene); } // // The following allows Bboard 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:../images/earth.jpg"); stoneURL = new java.net.URL("file:../images/stone.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } new MainFrame(new Bboard(earthURL, stoneURL), 400, 400); } public void actionPerformed(ActionEvent e) { String command = e.getActionCommand(); if (command.equals("Toggle View Enabled")) { if(renderOn) universe.getViewer().getView().stopView(); else universe.getViewer().getView().startView(); renderOn = !renderOn; } } }