Tutorial scope

Working Groups
External Authoring Interface (EAI)

104

Applet Java para acceder a VRML EAI

Applet Java import vrml.external.*;
import vrml.external.field.*;
import vrml.external.exception.*;

public class appletEAI extends Applet implements Runnable, EventOutObserver{

Browser browser;

Node defprox;

EventOutSFVec3f position;

float[] newposition;

public void run(){
     browser = null;
     while (browser == null){
          browser = Browser.getBrowser(this);
         try{Thread.sleep(1000);
         }catch(InterruptedException ie){}
     }
    try { defprox = browser.getNode("DefProx");
    } catch (InvalidNodeException e) { }
    try { position = (EventOutSFVec3f)
             defprox.getEventOut("position_changed");
    }catch(InterruptedException ie){}

Object data=null;
position.advise(this,data);
}

public void callback(EventOut eo, double timestamp, Object userData)
{
    newposition = new float [3];
   try { position = (EventOutSFVec3f) eo;
           newposition = position.getValue();
    }catch(InterruptedException ie){}

   String pos0 = ;
   String pos1 = String.valueOf(newposition [1]);
   String pos2 = String.valueOf(newposition [2]);

   String strposition = "X= "+ String.valueOf(newposition [0])+" ; Y= "+String.valueOf(newposition [1])+" ; Z= "+String.valueOf(newposition [2]);

showStatus("Nueva posición: "+ strposition);
}

Código HTML

<APPLET CODE="appletEAI.class" NAME="appletEAI" width="1" height="1" MAYSCRIPT></APPLET>
<EMBED src="eai-vrml2.wrl" align="baseline" border="0" width="300" height="300" name="vrml">