* Compile with: "javac DrawLsystem.java" *
* Run with: "java -Xmx64m DrawLsystem weed.lsys" (if you have 64 megs RAM) *
* @author Scott Teresi, April 1999, www.teresi.us * */ public class DrawLsystem { int depth = 6; // depth of Lsystem execution Color3f skyColor = new Color3f(0.0f, 0.2f, 1f); // (0, .6, .2) Color3f groundColor = new Color3f(0.1f, .65f, 0.02f); int rotateSpeed = 60000; // 20,000 ms per revolution public DrawLsystem(String filename) { Lsystem lsystem = new Lsystem(); // set starting point, line length, init. angle lsystem.initLsys (new Point3d(0d, 0d, 0d), 8.0, 0.0); // set cylinder thickness, thickness multiplier, cylinder edges, debug flag lsystem.initDraw (.07, .02, 7, false); // set the color of the Appearance Material mat1 = new Material(); mat1.setDiffuseColor(.9f, .2f, .05f); mat1.setAmbientColor(.18f, .05f, 0f); Appearance branchApp = new Appearance(); branchApp.setMaterial(mat1); Appearance leafApp = new Appearance(); Material mat2 = new Material(); mat2.setDiffuseColor(0f, .7f, .05f); mat2.setAmbientColor(0f, .3f, 0f); leafApp.setMaterial(mat2); lsystem.setAppearance(branchApp, leafApp); // interpret the Lsystem lsystem.readLsystem(filename); BranchGroup lsysBg = lsystem.execute(depth); // build the scene BranchGroup mainBg = createUniverse(); mainBg.addChild(drawGround()); mainBg.addChild(lsysBg); } BranchGroup createUniverse() { // set up the display frame Frame frame = new Frame("Tree Display"); frame.setLayout(new BorderLayout()); WindowListener l = new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }; frame.addWindowListener(l); Canvas3D canvas = new Canvas3D(null); frame.setSize(800, 700); frame.add("Center", canvas); frame.setVisible(true); // create the universe VirtualUniverse u = new VirtualUniverse(); Locale locale = new Locale(u); // set up the view // view transformations Transform3D transform = new Transform3D(); transform.setTranslation(new Vector3d(0, 16, 75)); Transform3D rotateX = new Transform3D(); rotateX.rotX(-Math.PI/6); transform.mul(rotateX, transform); BranchGroup viewBranch = new BranchGroup(); TransformGroup firstViewTrans = new TransformGroup(transform); TransformGroup viewTrans = new TransformGroup(); ViewPlatform viewPlatform = new ViewPlatform(); viewBranch.addChild(firstViewTrans); firstViewTrans.addChild(viewTrans); viewTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); viewTrans.addChild(viewPlatform); viewPlatform.setActivationRadius(1000.0f); View view = new View(); view.attachViewPlatform(viewPlatform); view.addCanvas3D(canvas); view.setPhysicalBody(new PhysicalBody()); view.setPhysicalEnvironment(new PhysicalEnvironment()); view.setBackClipDistance(100000f); view.setViewPolicy(View.SCREEN_VIEW); view.setWindowResizePolicy(View.VIRTUAL_WORLD); // doesn't work view.setWindowMovementPolicy(View.VIRTUAL_WORLD); // doesn't work viewBranch.compile(); locale.addBranchGraph(viewBranch); // apply lighting, background color BranchGroup mainBg = new BranchGroup(); mainBg.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 200.0); Background bgrnd = new Background(skyColor); bgrnd.setApplicationBounds(bounds); mainBg.addChild(bgrnd); PointLight light1 = new PointLight(); light1.setPosition(new Point3f(70, 20, -50)); light1.setColor(new Color3f(1.0f, 1.0f, 1.0f)); light1.setInfluencingBounds(bounds); mainBg.addChild(light1); AmbientLight ambient1 = new AmbientLight(true, new Color3f(1f, 1f, 1f)); ambient1.setInfluencingBounds(bounds); mainBg.addChild(ambient1); // set up rotation animation behavior BranchGroup objRoot = new BranchGroup(); TransformGroup objSpin = new TransformGroup(); objSpin.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); objSpin.addChild(mainBg); objRoot.addChild(objSpin); RotationInterpolator rotator = new RotationInterpolator(new Alpha(-1, rotateSpeed), objSpin); BoundingSphere boundSphere = new BoundingSphere(); rotator.setSchedulingBounds(boundSphere); objSpin.addChild(rotator); objRoot.compile(); locale.addBranchGraph(objRoot); return mainBg; } BranchGroup drawGround() { BranchGroup bg = new BranchGroup(); bg.setCapability(BranchGroup.ALLOW_BOUNDS_READ); // create ground int numPoints = 4; Point3f[] points; points = new Point3f[numPoints]; points[0] = new Point3f(-20f, 0f, 20f); points[1] = new Point3f(20f, 0f, 20f); points[2] = new Point3f(20f, 0f, -20f); points[3] = new Point3f(-20f, 0f, -20f); Color3f[] colors = new Color3f[4]; for (int i = 0; i < 4; i ++) colors[i] = groundColor; int[] indices = new int[4]; indices[0] = 0; indices[1] = 1; indices[2] = 2; indices[3] = 3; int[] stripCounts = new int[1]; stripCounts[0] = 4; GeometryInfo geoInfo = new GeometryInfo(GeometryInfo.POLYGON_ARRAY); geoInfo.setStripCounts(stripCounts); geoInfo.setCoordinates(points); geoInfo.setCoordinateIndices(indices); geoInfo.setColors(colors); geoInfo.setColorIndices(indices); Triangulator tr = new Triangulator(); tr.triangulate(geoInfo); NormalGenerator nm = new NormalGenerator(); nm.generateNormals(geoInfo); Shape3D shape = new Shape3D(geoInfo.getGeometryArray(), new Appearance()); bg.addChild(shape); bg.compile(); return bg; } public static void main (String args[]) { String file = new String(); if (args.length == 1) file = args[0]; else { System.out.println("Please specify a file containing an L-System."); System.exit(0); } // create an instance of this class DrawLsystem drawLsystem = new DrawLsystem(file); } }