//testtraverse.java

import vrml.external.Browser;
import vrml.external.Node;
import vrml.external.exception.*;
import vrml.external.field.*;
import java.applet.*;
import java.awt.*;
import java.util.*;
import netscape.javascript.JSObject;

public class TestExternal4 extends Applet{

TextArea output = null;
Browser browser;
Node protogroupnode;
Node [] childprotos;

public void init(){


}

public void start(){

output = new TextArea(10, 40);
add(output); 

    //
    // make connection to Cosmo Player
    //

    JSObject win = JSObject.getWindow(this);
    JSObject doc = (JSObject) win.getMember("document");
    JSObject embeds = (JSObject) doc.getMember("embeds");
    browser = (Browser) embeds.getSlot(0);

    //
    // Get handle to root of the scene graph
    //
    
    try {
      protogroupnode = browser.getNode("PROTOGROUPNODE");

    }
    catch (InvalidNodeException e) {
      output.appendText("error: get protogroupnode\n");
    }

output.appendText("Root node type: " + protogroupnode.getType()+"\n");


// get all child objects of protogroupnode

try{
childprotos=((EventOutMFNode) (protogroupnode.getEventOut("children_changed"))).getValue();
}
 catch (InvalidEventOutException e) {
output.appendText("protogroupnode eventout get failed, invalid eventout\n");
}
output.appendText("got child nodes \n");

// cycle through proto child nodes

int i;
Node tempnode=null;
for (i=0; i< childprotos.length;i++)
{
tempnode=childprotos[i];

output.appendText("childproto at index " + i + " get ok \n");
float[] tempvals=new float[3];
float[] tempvals2=new float[3];
{  
try{
tempvals=((EventOutSFVec3f) (tempnode.getEventOut("translation_changed"))).getValue();
}
catch (InvalidEventOutException e){output.appendText("childproto at index " + i + " eventout get failed, invalid eventout\n");}
output.appendText("childproto at index "+i+" at initpos: "+tempvals[0]+", "+tempvals[1]+", "+tempvals[2]+"\n" );
tempvals2[0]=tempvals[0]+1.0f;
tempvals2[1]=tempvals[1]+1.0f;
tempvals2[2]=tempvals[2]+1.0f;

// get EventIn of current proto

EventInSFVec3f eventtoproto=(EventInSFVec3f) childprotos[i].getEventIn("set_translation");

// send value to EventIn of current proto

eventtoproto.setValue(tempvals2);
output.appendText("childproto at index " + i + " updated at pos "+tempvals2[0]+", "+tempvals2[1]+", "+tempvals2[2]+"\n" );
}

// end this section
}
} //start
} //class