Re: Dividing up the screen

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Nicolas Gauvin (nicolas++at++cae.ca)
Thu, 12 Sep 1996 12:25:23 -0400

You could use pfChannel::setViewport to tell Performer
to draw only in the top half portion of your pfPipeWindow()
and then in a draw callback you could draw your instruments
directly by resetting the viewport to the bottom half.
I'm assuming you draw your instruments using GL directly,
not Performer nodes.

Something like:

chan = new pfChannel(pipe);
chan->setViewport(0.0f,1.0f,0.5f,1.0f);

drawCB(pfChannel* chan, void* data)
{
  chan->clear();
  pfDraw(); /* draw OWD and HUD */

#ifdef IRISGL
  /* draw your 2D instrument in bottom half using GL*/
  pushviewport();
  viewport(0.0f,0.0,0.0f,0.5f);
  ortho2(...)
  ...
  popviewport();
#endif
}

I haven't tried this myself.

Nicolas Gauvin CAE Electronics Ltd., 8585 Cote De Liesse
Software Developer Saint-Laurent, Quebec, Canada, H4L-4X4
3-D Graphics Applications tel: +1 514 341 2000 extension 2275
nicolas++at++cae.ca fax: +1 514 340 5496
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