Re: array Index

• To: "Brobbey,Isaac" <IBBrobbey@xxxxxxxxxxxxxxx>
• Subject: Re: array Index
• From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>
• Date: Fri, 16 Aug 2002 09:49:06 -0500

"Brobbey,Isaac" wrote:
> 
> hi all:
> 
>  this is a portion of my code which i have in my cellImpl.
> 
> DisplayRenderer dr = display.getDisplayRenderer();
>            MouseBehavior mb = dr.getMouseBehavior();
>           double[] position1 = null;
>           if (display instanceof DisplayImplJ3D)
>             {
>              position1 = new double[] { 1.0,  1.0,  1.0};
>             }
>           int[] screen1 = mb.getScreenCoords(position1);
>           System.out.println("screen1 = (" + screen1[0] + ", " + screen1[1]
> +" " +screen1[2]+")");
>         }
>       }
>     };
>     cellfield2d.addReference(ref);
> 
> when i click the right mouse,  i get the error below
> 
> java.lang.ArrayIndexOutOfBoundsException
>         at Spikesxxx$1.doAction(Spikesxxx.java:176)
>         at visad.ActionImpl.run(ActionImpl.java:243)
>         at visad.util.ThreadPool$ThreadMinnow.run(ThreadPool.java:95)
> 
> it seemns i am getting only 2 coordinates instead of 3. the missing one will
> be the z-axis component. am i doing something wrong or missing something ?
> what can possibly cause only two coordinates to be read ?

Screen coordinates are two-dimensional: line and element.
So the getScreenCoords() method returns an int[2] array.

Bill

• References:
  • array Index
    • From: Brobbey,Isaac