[javascript-dev] Strange "undefined" problem using screentoworld...

I have the following code sample...

wxyz = sketch.screentoworld(SizeW/2,SizeH/2);	
post("wxyz =", wxyz, "
");
this.NodeList[0].x = wxyz.x;
this.NodeList[0].y = wxyz.y;
//this.NodeList[0].x = 0.0;
//this.NodeList[0].y = 0.0
this.NodeList[0].z = 1.0;

When I try to use screentoworld, and assign the value
to x and y, I get an "undefined" result. The output 
looks like this...

NodeGraph dump:  1 nodes.
node 0 :  <undefined> <undefined> 1     

If I comment in the commented out lines I get this...

NodeGraph dump:  1 nodes.
node 0 :  0.0 0.0 1 

It looks like using the values returned from screentoworld causes
some problem. Can anyone see a reason why it would do this?



Thanks,
Anthony