movetest4.java

JAVA与EAI的结合,控制VRML场景中的物体,利用鼠标拖动物体.

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import vrml.external.*;
import vrml.external.field.*;
import vrml.external.exception.*;

public class MoveTest4 extends Applet implements EventOutObserver{
  TextField XField=new TextField(10);
  TextField YField=new TextField(10);
  TextField ZField=new TextField(10);
  Browser theBrowser = null;
  EventInSFVec3f trans1=null;

  public void init() {
    XField.setEditable(false);
    YField.setEditable(false);
    ZField.setEditable(false);
    this.setLayout(new BorderLayout());
    Panel p1=new Panel();
    p1.setLayout(new GridBagLayout());
    GridBagConstraints gbc=new GridBagConstraints();
    gbc.fill=GridBagConstraints.BOTH;
    gbc.anchor=GridBagConstraints.CENTER;
    gbc.gridwidth=1;
    p1.add(new Label("替身位置"),gbc);
    p1.add(XField,gbc);
    p1.add(YField,gbc);
    p1.add(ZField,gbc);
    this.add(p1,BorderLayout.NORTH);

    while (true) {
      try {
        theBrowser=Browser.getBrowser(this);
        Node Locator=theBrowser.getNode("Locator");
        EventOut OutLocator1=Locator.getEventOut("position_changed");
        OutLocator1.advise(this,null);
        break;
      }

      catch (Exception e) {
        System.out.println("实例获取失败！");
        try{
          Thread.sleep(200);
        }
        catch(InterruptedException eX){

        }
      }
    }
  }

  public void callback(EventOut event,double time,Object data){
      float[] Posit = ( (EventOutSFVec3f) event).getValue();
      XField.setText(new Float(Posit[0]).toString());
      YField.setText(new Float(Posit[1]).toString());
      ZField.setText(new Float(Posit[2]).toString());

  }
}