Java tutorial
// Copyright 2001 Resplendent Technology Ltd. greg@resplendent.com import java.applet.Applet; import java.awt.FlowLayout; import java.awt.GraphicsConfiguration; import java.net.URL; import java.util.Enumeration; import java.util.Hashtable; import javax.media.j3d.AmbientLight; import javax.media.j3d.Appearance; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.Material; import javax.media.j3d.RenderingAttributes; import javax.media.j3d.Shape3D; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.TransparencyAttributes; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3f; import com.sun.j3d.loaders.Scene; import com.sun.j3d.loaders.objectfile.ObjectFile; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior; import com.sun.j3d.utils.behaviors.mouse.MouseRotate; import com.sun.j3d.utils.behaviors.mouse.MouseTranslate; import com.sun.j3d.utils.universe.SimpleUniverse; public class RedGreenGriffin extends Applet { protected Canvas3D c1 = new Canvas3D(SimpleUniverse.getPreferredConfiguration()); // private Canvas3D c2 = new // Canvas3D(SimpleUniverse.getPreferredConfiguration()); private static MainFrame mf; protected SimpleUniverse u = null; protected BranchGroup scene = null; protected String URLString = "http://www.java3d.org/saurus.obj"; protected float eyeOffset = 0.03F; protected static int size = 600; public void init() { setLayout(new FlowLayout()); GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration(); String v = getParameter("url"); if (v != null) { URLString = v; } c1.setSize(size, size); add(c1); scene = createSceneGraph(0); u = new SimpleUniverse(c1); // This will move the ViewPlatform back a bit so the // objects in the scene can be viewed. //u.getViewingPlatform().setNominalViewingTransform(); u.addBranchGraph(scene); } public BranchGroup createSceneGraph(int i) { System.out.println("Creating scene for: " + URLString); // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); try { Transform3D myTransform3D = new Transform3D(); myTransform3D.setTranslation(new Vector3f(+0.0f, -0.15f, -3.6f)); TransformGroup objTrans = new TransformGroup(myTransform3D); objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); Transform3D t = new Transform3D(); TransformGroup tg = new TransformGroup(t); tg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); objTrans.addChild(tg); URL url = new URL(URLString); ObjectFile f = new ObjectFile(); f.setFlags(ObjectFile.RESIZE | ObjectFile.TRIANGULATE | ObjectFile.STRIPIFY); System.out.println("About to load"); Scene s = f.load(url); Transform3D myTrans = new Transform3D(); myTrans.setTranslation(new Vector3f(eyeOffset, -eyeOffset, 0F)); TransformGroup mytg = new TransformGroup(myTrans); //mytg.addChild(s.getSceneGroup()); tg.addChild(mytg); Transform3D myTrans2 = new Transform3D(); myTrans2.setTranslation(new Vector3f(-eyeOffset, +eyeOffset, 0F)); TransformGroup mytg2 = new TransformGroup(myTrans2); //mytg2.addChild(s.getSceneGroup()); Hashtable table = s.getNamedObjects(); for (Enumeration e = table.keys(); e.hasMoreElements();) { Object key = e.nextElement(); System.out.println(key); Object obj = table.get(key); System.out.println(obj.getClass().getName()); Shape3D shape = (Shape3D) obj; //shape.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE); Appearance ap = new Appearance(); Color3f black = new Color3f(0.0f, 0.0f, 0.0f); Color3f red = new Color3f(0.7f, .0f, .15f); Color3f green = new Color3f(0f, .7f, .15f); ap.setMaterial(new Material(green, black, green, black, 1.0f)); Appearance ap2 = new Appearance(); ap2.setMaterial(new Material(red, black, red, black, 1.0f)); float transparencyValue = 0.5f; TransparencyAttributes t_attr = new TransparencyAttributes(TransparencyAttributes.BLENDED, transparencyValue, TransparencyAttributes.BLEND_SRC_ALPHA, TransparencyAttributes.BLEND_ONE); ap2.setTransparencyAttributes(t_attr); ap2.setRenderingAttributes(new RenderingAttributes()); ap.setTransparencyAttributes(t_attr); ap.setRenderingAttributes(new RenderingAttributes()); // bg.addChild(ap); shape.setAppearance(ap); mytg2.addChild(new Shape3D(shape.getGeometry(), ap2)); mytg.addChild(new Shape3D(shape.getGeometry(), ap)); } tg.addChild(mytg2); System.out.println("Finished Loading"); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); Color3f light1Color = new Color3f(.9f, 0.9f, 0.9f); Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f); DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction); light1.setInfluencingBounds(bounds); objTrans.addChild(light1); // Set up the ambient light Color3f ambientColor = new Color3f(1.0f, .4f, 0.3f); AmbientLight ambientLightNode = new AmbientLight(ambientColor); ambientLightNode.setInfluencingBounds(bounds); objTrans.addChild(ambientLightNode); MouseRotate behavior = new MouseRotate(); behavior.setTransformGroup(tg); objTrans.addChild(behavior); // Create the translate behavior node MouseTranslate behavior3 = new MouseTranslate(); behavior3.setTransformGroup(tg); objTrans.addChild(behavior3); behavior3.setSchedulingBounds(bounds); KeyNavigatorBehavior keyNavBeh = new KeyNavigatorBehavior(tg); keyNavBeh.setSchedulingBounds(new BoundingSphere(new Point3d(), 1000.0)); objTrans.addChild(keyNavBeh); behavior.setSchedulingBounds(bounds); objRoot.addChild(objTrans); } catch (Throwable t) { System.out.println("Error: " + t); } return objRoot; } public RedGreenGriffin() { } public void destroy() { u.removeAllLocales(); } public static void main(String[] args) { RedGreenGriffin s = new RedGreenGriffin(); if (args.length > 0) { s.URLString = args[0]; } mf = new MainFrame(s, size, size); } }