movetest1.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 MoveTest1 extends Applet implements EventOutObserver{
  String s = "";
  String dat = "";
  String hitPoint="";
  TextField text;
  TextField textdata;
  TextField texttrack;
  Browser theBrowser = null;
  EventOut OutLocator1 = null;
  EventOut OutLocator2 = null;
  public void init() {
    text = new TextField(80);
    textdata = new TextField(40);
    texttrack = new TextField(40);
    setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20));
    add(text);
    add(textdata);
    add(texttrack);
    while (true) {
      try {
        theBrowser = Browser.getBrowser(this);
        Node Locator = theBrowser.getNode("Tch1");
        Node Locator3=theBrowser.getNode("PlaneSen");
        EventOut OutLocator1 = Locator.getEventOut("hitPoint_changed");
        EventOut OutLocator2 = Locator.getEventOut("isActive");
        EventOut OutPlane=Locator3.getEventOut("trackPoint_changed");
        OutLocator1.advise(this, "hitPoint_changed");
        OutLocator2.advise(this, "isActive");
        OutPlane.advise(this,"hitPoint_changed");

        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) {
    s = event.toString();
    dat = data.toString();
    hitPoint=data.toString();
    text.setText(s);
    textdata.setText(dat);
    texttrack.setText(hitPoint);
    float[] Posit = new float[3];
    float[] hitPoin=new float[3];
    Node Obj1 = theBrowser.getNode("Obj1");
    EventInSFVec3f trans1 = (EventInSFVec3f) Obj1.getEventIn(
        "set_translation");
     if (data.toString() == "hitPoint_changed"){
       hitPoin = ( (EventOutSFVec3f) event).getValue();
       trans1.setValue(hitPoin);
     }
    if (data.toString() == "isActive") {

      trans1.setValue(Posit);

    }


  }
}