Java tutorial
/* * @(#)IntersectTest.java 1.10 02/10/21 13:48:59 * * 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.GraphicsConfiguration; import java.awt.event.MouseEvent; import java.util.Enumeration; import javax.media.j3d.AmbientLight; import javax.media.j3d.Appearance; import javax.media.j3d.Behavior; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.GeometryArray; import javax.media.j3d.Group; import javax.media.j3d.LineArray; import javax.media.j3d.Material; import javax.media.j3d.Node; import javax.media.j3d.PointArray; import javax.media.j3d.PolygonAttributes; import javax.media.j3d.QuadArray; import javax.media.j3d.Shape3D; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.TriangleArray; import javax.media.j3d.View; import javax.media.j3d.WakeupCriterion; import javax.media.j3d.WakeupOnAWTEvent; import javax.vecmath.Color3f; import javax.vecmath.Color4f; 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.keyboard.KeyNavigatorBehavior; import com.sun.j3d.utils.geometry.Sphere; import com.sun.j3d.utils.picking.PickCanvas; import com.sun.j3d.utils.picking.PickIntersection; import com.sun.j3d.utils.picking.PickResult; import com.sun.j3d.utils.picking.PickTool; import com.sun.j3d.utils.universe.SimpleUniverse; public class IntersectTest extends Applet { BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 1000.0); private SimpleUniverse u = null; public BranchGroup createSceneGraph() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); // 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); Transform3D t3 = new Transform3D(); // Shapes for (int x = 0; x < 3; x++) { for (int y = 0; y < 3; y++) { for (int z = 0; z < 3; z++) { t3.setTranslation(new Vector3d(-4 + x * 4.0, -4 + y * 4.0, -20 - z * 4.0)); TransformGroup objTrans = new TransformGroup(t3); objRoot.addChild(objTrans); // Create a simple shape leaf node, add it to the scene // graph. GeometryArray geom = null; if (((x + y + z) % 2) == 0) { geom = new RandomColorCube(); } else { geom = new RandomColorTetrahedron(); } Shape3D shape = new Shape3D(geom); // use the utility method to set the capabilities PickTool.setCapabilities(shape, PickTool.INTERSECT_FULL); objTrans.addChild(shape); } } } // Lines Point3f[] verts = { new Point3f(-2.0f, 0.0f, 0.0f), new Point3f(2.0f, 0.0f, 0.0f) }; Color3f grey = new Color3f(0.7f, 0.7f, 0.7f); Color3f[] colors = { grey, grey }; for (int y = 0; y < 5; y++) { for (int z = 0; z < 5; z++) { t3.setTranslation(new Vector3d(7.0, -4 + y * 2.0, -20.0 - z * 2.0)); TransformGroup objTrans = new TransformGroup(t3); objRoot.addChild(objTrans); LineArray la = new LineArray(verts.length, LineArray.COORDINATES | LineArray.COLOR_3); la.setCoordinates(0, verts); la.setColors(0, colors); Shape3D shape = new Shape3D(); shape.setGeometry(la); // use the utility method to set the capabilities PickTool.setCapabilities(shape, PickTool.INTERSECT_FULL); objTrans.addChild(shape); } } // Points for (double x = -2.0; x <= 2.0; x += 1.0) { for (double y = -2.0; y <= 2.0; y += 1.0) { for (double z = -2.0; z <= 2.0; z += 1.0) { t3.setTranslation(new Vector3d(-10.0 + 2.0 * x, 0.0 + 2.0 * y, -20.0 + 2.0 * z)); TransformGroup objTrans = new TransformGroup(t3); objRoot.addChild(objTrans); PointArray pa = new PointArray(1, PointArray.COORDINATES | PointArray.COLOR_3); pa.setCoordinate(0, new Point3d(0.0, 0.0, 0.0)); pa.setColor(0, grey); Shape3D shape = new Shape3D(); shape.setGeometry(pa); // use the utility method to set the capabilities PickTool.setCapabilities(shape, PickTool.INTERSECT_FULL); objTrans.addChild(shape); } } } return objRoot; } public IntersectTest() { } public void init() { 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); // Add picking behavior IntersectInfoBehavior behavior = new IntersectInfoBehavior(c, scene, 0.05f); behavior.setSchedulingBounds(bounds); scene.addChild(behavior); TransformGroup vpTrans = u.getViewingPlatform().getViewPlatformTransform(); KeyNavigatorBehavior keybehavior = new KeyNavigatorBehavior(vpTrans); keybehavior.setSchedulingBounds(bounds); scene.addChild(keybehavior); scene.setCapability(Group.ALLOW_CHILDREN_EXTEND); scene.compile(); u.addBranchGraph(scene); View view = u.getViewer().getView(); view.setBackClipDistance(100000); } public void destroy() { u.cleanup(); } // // The following allows IntersectTest to be run as an application // as well as an applet // public static void main(String[] args) { String s = "\n\nIntersectTest:\n-----------\n"; s += "Pick with the mouse over the primitives\n"; s += "- A sphere will be placed to indicate the picked point.\n"; s += "If color information is available, the sphere will change color to reflect\n"; s += "the interpolated color.\n"; s += "- Other spheres will be placed to show the vertices of the selected polygon\n"; s += "- Information will be displayed about the picking operation\n\n\n"; System.out.println(s); new MainFrame(new IntersectTest(), 640, 640); } } class RandomColorTetrahedron extends TriangleArray { RandomColorTetrahedron() { super(12, GeometryArray.COORDINATES | GeometryArray.COLOR_3); Point3f verts[] = new Point3f[4]; Color3f colors[] = new Color3f[4]; verts[0] = new Point3f(0.5f, 0.5f, 0.5f); verts[1] = new Point3f(0.5f, -0.5f, -0.5f); verts[2] = new Point3f(-0.5f, -0.5f, 0.5f); verts[3] = new Point3f(-0.5f, 0.5f, -0.5f); colors[0] = new Color3f(1.0f, 0.0f, 0.0f); colors[1] = new Color3f(0.0f, 1.0f, 0.0f); colors[2] = new Color3f(0.0f, 0.0f, 1.0f); Point3f pnts[] = new Point3f[12]; Color3f clrs[] = new Color3f[12]; pnts[0] = verts[2]; clrs[0] = colors[(int) (Math.random() * 3.0)]; pnts[1] = verts[1]; clrs[1] = colors[(int) (Math.random() * 3.0)]; pnts[2] = verts[0]; clrs[2] = colors[(int) (Math.random() * 3.0)]; pnts[3] = verts[3]; clrs[3] = colors[(int) (Math.random() * 3.0)]; pnts[4] = verts[2]; clrs[4] = colors[(int) (Math.random() * 3.0)]; pnts[5] = verts[0]; clrs[5] = colors[(int) (Math.random() * 3.0)]; pnts[6] = verts[1]; clrs[6] = colors[(int) (Math.random() * 3.0)]; pnts[7] = verts[2]; clrs[7] = colors[(int) (Math.random() * 3.0)]; pnts[8] = verts[3]; clrs[8] = colors[(int) (Math.random() * 3.0)]; pnts[9] = verts[1]; clrs[9] = colors[(int) (Math.random() * 3.0)]; pnts[10] = verts[3]; clrs[10] = colors[(int) (Math.random() * 3.0)]; pnts[11] = verts[0]; clrs[11] = colors[(int) (Math.random() * 3.0)]; setCoordinates(0, pnts); setColors(0, clrs); } } class RandomColorCube extends QuadArray { RandomColorCube() { super(24, GeometryArray.COORDINATES | GeometryArray.COLOR_3); Point3f verts[] = new Point3f[8]; Color3f colors[] = new Color3f[3]; verts[0] = new Point3f(0.5f, 0.5f, 0.5f); verts[1] = new Point3f(-0.5f, 0.5f, 0.5f); verts[2] = new Point3f(-0.5f, -0.5f, 0.5f); verts[3] = new Point3f(0.5f, -0.5f, 0.5f); verts[4] = new Point3f(0.5f, 0.5f, -0.5f); verts[5] = new Point3f(-0.5f, 0.5f, -0.5f); verts[6] = new Point3f(-0.5f, -0.5f, -0.5f); verts[7] = new Point3f(0.5f, -0.5f, -0.5f); colors[0] = new Color3f(1.0f, 0.0f, 0.0f); colors[1] = new Color3f(0.0f, 1.0f, 0.0f); colors[2] = new Color3f(0.0f, 0.0f, 1.0f); Point3f pnts[] = new Point3f[24]; Color3f clrs[] = new Color3f[24]; pnts[0] = verts[0]; clrs[0] = colors[(int) (Math.random() * 3.0)]; pnts[1] = verts[3]; clrs[1] = colors[(int) (Math.random() * 3.0)]; pnts[2] = verts[7]; clrs[2] = colors[(int) (Math.random() * 3.0)]; pnts[3] = verts[4]; clrs[3] = colors[(int) (Math.random() * 3.0)]; pnts[4] = verts[1]; clrs[4] = colors[(int) (Math.random() * 3.0)]; pnts[5] = verts[5]; clrs[5] = colors[(int) (Math.random() * 3.0)]; pnts[6] = verts[6]; clrs[6] = colors[(int) (Math.random() * 3.0)]; pnts[7] = verts[2]; clrs[7] = colors[(int) (Math.random() * 3.0)]; pnts[8] = verts[0]; clrs[8] = colors[(int) (Math.random() * 3.0)]; pnts[9] = verts[4]; clrs[9] = colors[(int) (Math.random() * 3.0)]; pnts[10] = verts[5]; clrs[10] = colors[(int) (Math.random() * 3.0)]; pnts[11] = verts[1]; clrs[11] = colors[(int) (Math.random() * 3.0)]; pnts[12] = verts[3]; clrs[12] = colors[(int) (Math.random() * 3.0)]; pnts[13] = verts[2]; clrs[13] = colors[(int) (Math.random() * 3.0)]; pnts[14] = verts[6]; clrs[14] = colors[(int) (Math.random() * 3.0)]; pnts[15] = verts[7]; clrs[15] = colors[(int) (Math.random() * 3.0)]; pnts[16] = verts[0]; clrs[16] = colors[(int) (Math.random() * 3.0)]; pnts[17] = verts[1]; clrs[17] = colors[(int) (Math.random() * 3.0)]; pnts[18] = verts[2]; clrs[18] = colors[(int) (Math.random() * 3.0)]; pnts[19] = verts[3]; clrs[19] = colors[(int) (Math.random() * 3.0)]; pnts[20] = verts[7]; clrs[20] = colors[(int) (Math.random() * 3.0)]; pnts[21] = verts[6]; clrs[21] = colors[(int) (Math.random() * 3.0)]; pnts[22] = verts[5]; clrs[22] = colors[(int) (Math.random() * 3.0)]; pnts[23] = verts[4]; clrs[23] = colors[(int) (Math.random() * 3.0)]; setCoordinates(0, pnts); setColors(0, clrs); } } /** * Class: IntersectInfoBehavior * * Description: Used to respond to mouse pick and drag events in the 3D window. * Displays information about the pick. * * Version: 1.0 * */ class IntersectInfoBehavior extends Behavior { float size; PickCanvas pickCanvas; PickResult[] pickResult; Appearance oldlook, redlookwf, redlook, greenlook, bluelook; Node oldNode = null; GeometryArray oldGeom = null; Color3f redColor = new Color3f(1.0f, 0.0f, 0.0f); TransformGroup[] sphTrans = new TransformGroup[6]; Sphere[] sph = new Sphere[6]; Transform3D spht3 = new Transform3D(); public IntersectInfoBehavior(Canvas3D canvas3D, BranchGroup branchGroup, float size) { pickCanvas = new PickCanvas(canvas3D, branchGroup); pickCanvas.setTolerance(5.0f); pickCanvas.setMode(PickCanvas.GEOMETRY_INTERSECT_INFO); this.size = size; // Create an Appearance. redlook = new Appearance(); Color3f objColor = new Color3f(0.5f, 0.0f, 0.0f); Color3f black = new Color3f(0.0f, 0.0f, 0.0f); Color3f white = new Color3f(1.0f, 1.0f, 1.0f); redlook.setMaterial(new Material(objColor, black, objColor, white, 50.0f)); redlook.setCapability(Appearance.ALLOW_MATERIAL_WRITE); redlookwf = new Appearance(); redlookwf.setMaterial(new Material(objColor, black, objColor, white, 50.0f)); PolygonAttributes pa = new PolygonAttributes(); pa.setPolygonMode(pa.POLYGON_LINE); pa.setCullFace(pa.CULL_NONE); redlookwf.setPolygonAttributes(pa); oldlook = new Appearance(); objColor = new Color3f(1.0f, 1.0f, 1.0f); oldlook.setMaterial(new Material(objColor, black, objColor, white, 50.0f)); greenlook = new Appearance(); objColor = new Color3f(0.0f, 0.8f, 0.0f); greenlook.setMaterial(new Material(objColor, black, objColor, white, 50.0f)); bluelook = new Appearance(); objColor = new Color3f(0.0f, 0.0f, 0.8f); bluelook.setMaterial(new Material(objColor, black, objColor, white, 50.0f)); for (int i = 0; i < 6; i++) { switch (i) { case 0: sph[i] = new Sphere(size * 1.15f, redlook); break; case 1: sph[i] = new Sphere(size * 1.1f, greenlook); break; default: sph[i] = new Sphere(size, bluelook); break; } sph[i].setPickable(false); sphTrans[i] = new TransformGroup(); sphTrans[i].setCapability(TransformGroup.ALLOW_TRANSFORM_READ); sphTrans[i].setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); // Add sphere, transform branchGroup.addChild(sphTrans[i]); sphTrans[i].addChild(sph[i]); } } public void initialize() { wakeupOn(new WakeupOnAWTEvent(MouseEvent.MOUSE_PRESSED)); } public void processStimulus(Enumeration criteria) { WakeupCriterion wakeup; AWTEvent[] event; int eventId; while (criteria.hasMoreElements()) { wakeup = (WakeupCriterion) criteria.nextElement(); if (wakeup instanceof WakeupOnAWTEvent) { event = ((WakeupOnAWTEvent) wakeup).getAWTEvent(); for (int i = 0; i < event.length; i++) { eventId = event[i].getID(); if (eventId == MouseEvent.MOUSE_PRESSED) { int x = ((MouseEvent) event[i]).getX(); int y = ((MouseEvent) event[i]).getY(); pickCanvas.setShapeLocation(x, y); Point3d eyePos = pickCanvas.getStartPosition(); pickResult = pickCanvas.pickAllSorted(); // Use this to do picking benchmarks /* * long start = System.currentTimeMillis(); for (int * l=0;l <3;l++) { if (l == 0) System.out.print * ("BOUNDS: "); if (l == 1) System.out.print * ("GEOMETRY: "); if (l == 2) System.out.print * ("GEOMETRY_INTERSECT_INFO: "); * * for (int k=0;k <1000;k++) { if (l == 0) { * pickCanvas.setMode(PickTool.BOUNDS); pickResult = * pickCanvas.pickAllSorted(); } if (l == 1) { * pickCanvas.setMode(PickTool.GEOMETRY); pickResult = * pickCanvas.pickAllSorted(); } if (l == 2) { * pickCanvas.setMode(PickTool.GEOMETRY_INTERSECT_INFO); * pickResult = pickCanvas.pickAllSorted(); } } long * delta = System.currentTimeMillis() - start; * System.out.println ("\t"+delta+" ms / 1000 picks"); } */ if (pickResult != null) { // Get closest intersection results PickIntersection pi = pickResult[0].getClosestIntersection(eyePos); GeometryArray curGeomArray = pi.getGeometryArray(); // Position sphere at intersection point Vector3d v = new Vector3d(); Point3d intPt = pi.getPointCoordinatesVW(); v.set(intPt); spht3.setTranslation(v); sphTrans[0].setTransform(spht3); // Position sphere at closest vertex Point3d closestVert = pi.getClosestVertexCoordinatesVW(); v.set(closestVert); spht3.setTranslation(v); sphTrans[1].setTransform(spht3); Point3d[] ptw = pi.getPrimitiveCoordinatesVW(); Point3d[] pt = pi.getPrimitiveCoordinates(); int[] coordidx = pi.getPrimitiveCoordinateIndices(); Point3d ptcoord = new Point3d(); for (int k = 0; k < pt.length; k++) { v.set(ptw[k]); spht3.setTranslation(v); sphTrans[k + 2].setTransform(spht3); } // Get interpolated color (if available) Color4f iColor4 = null; Color3f iColor = null; Vector3f iNormal = null; if (curGeomArray != null) { int vf = curGeomArray.getVertexFormat(); if (((vf & (GeometryArray.COLOR_3 | GeometryArray.COLOR_4)) != 0) && (null != (iColor4 = pi.getPointColor()))) { iColor = new Color3f(iColor4.x, iColor4.y, iColor4.z); // Change the point's color redlook.setMaterial(new Material(iColor, new Color3f(0.0f, 0.0f, 0.0f), iColor, new Color3f(1.0f, 1.0f, 1.0f), 50.0f)); } if (((vf & GeometryArray.NORMALS) != 0) && (null != (iNormal = pi.getPointNormal()))) { System.out.println("Interpolated normal: " + iNormal); } } System.out.println("============="); System.out.println("Coordinates of intersection pt:" + intPt); System.out.println("Coordinates of vertices: "); for (int k = 0; k < pt.length; k++) { System.out.println(k + ":" + ptw[k].x + " " + ptw[k].y + " " + ptw[k].z); } System.out.println("Closest vertex: " + closestVert); if (iColor != null) { System.out.println("Interpolated color: " + iColor); } if (iNormal != null) { System.out.println("Interpolated normal: " + iNormal); } } } } } } wakeupOn(new WakeupOnAWTEvent(MouseEvent.MOUSE_PRESSED)); } }