Re: BarbRendererJ3D

• To: Bill Hibbard <billh@xxxxxxxxxxxxx>
• Subject: Re: BarbRendererJ3D
• From: Tennessee James Leeuwenburg <tjl@xxxxxxxxxx>
• Date: Wed, 03 Dec 2003 09:05:43 +1100

My bad ... the NullPointerException is at this line :

>>>>>>    floop.setFlowScale(0.1f); <<<<<<<<<<<<<

of

ScalarMap flow1XMap = new ScalarMap(uType, Display.Flow1X);
flow1XMap.setRange(-40.0, 40.0);
FlowControl floop = (FlowControl)flow1XMap.getControl();
floop.setFlowScale(0.1f);

The rest of the stack trace is just Swing stuff...

I know there's good data in there, because if I don't make that call,
then the data renders correctly (although small), so I can't work out
why the returned flowcontrol might be null...

Let me know anything else you need.

Cheers,
-T



On Tue, 2003-12-02 at 21:19, Bill Hibbard wrote:
> Hi Tennessee,
> 
> > I'm having some hassles with BarbRendererJ3D. Essentially, the barbs are
> > too small. calling setRange against the flow1X and flow1Y scalarmaps
> > helped a little, but not nearly enough. I then tried to use the
> > setFlowScale of FlowControl in order to increase the size of the barbs.
> > However, what I get is a NullPointerException, caused by the call to
> > setFlowScale, occurring somewhere in VisAD.
> >
> >
> >             ScalarMap flow1XMap = new ScalarMap(uType, Display.Flow1X);
> >             flow1XMap.setRange(-40.0, 40.0);
> >             //((FlowControl)flow1XMap.getControl()).setFlowScale(0.1f);
> >             FlowControl floop = (FlowControl)flow1XMap.getControl();
> >             floop.setFlowScale(0.1f);
> >
> > Is a FlowControl the right way to enlarge the wind barbs?
> 
> That's the right way. Can you send us a stack dump with
> line numbers for the NullPointerException?
> 
> Cheers,
> Bill
> p.s., send to visad-list@xxxxxxxxxxxxxxxx
> 
> 

• Follow-Ups:
  • Re: BarbRendererJ3D
    • From: Don Murray

• References:
  • Re: BarbRendererJ3D
    • From: Bill Hibbard