intersectinfobehavior.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: IntersectInfoBehavior.java,v $
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
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 * 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 MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
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 * You acknowledge that this software is not designed, licensed or
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 * $Revision: 1.1 $
 * $Date: 2006/02/01 01:32:49 $
 * $State: Exp $
 */

package org.jdesktop.j3d.examples.picking;

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.pickfast.*;
import com.sun.j3d.utils.geometry.*;

/**
 * Class:       IntersectInfoBehavior
 * 
 * Description: Used to respond to mouse pick and drag events
 *              in the 3D window. Displays information about the pick.
 *
 * Version:     1.0
 *
 */
public class IntersectInfoBehavior extends Behavior {

  float size;
  PickCanvas pickCanvas;
  PickInfo[] pickInfoArr;
  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(PickInfo.PICK_GEOMETRY);
    pickCanvas.setFlags(PickInfo.LOCAL_TO_VWORLD | PickInfo.CLOSEST_GEOM_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);

	    pickInfoArr = pickCanvas.pickAllSorted();
	    // Use this to do picking benchmarks
	    /*
	    long start = System.currentTimeMillis();
	    for (int l=0;l<2;l++) {
	      if (l == 0) System.out.print ("BOUNDS: ");
	      if (l == 1) System.out.print ("GEOMETRY: ");

	      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();
		}
	      }
	      long delta = System.currentTimeMillis() - start;
	      System.out.println ("\t"+delta+" ms / 1000 picks");
	    }
	    */
	    if (pickInfoArr != null) {		
		
		// Get closest intersection results
		Transform3D l2vw = pickInfoArr[0].getLocalToVWorld();
		PickInfo.IntersectionInfo[] iInfoArr = pickInfoArr[0].getIntersectionInfos();
		PickIntersection pi = new PickIntersection(l2vw, iInfoArr[0]);

		// Safe to assume the return geometry is of GeometryArray type.
		GeometryArray curGeomArray = (GeometryArray) iInfoArr[0].getGeometry();

		// 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));
  }
}