Bernard Leclerc (bleclerc++at++poster.cae.ca)
Tue, 25 Mar 1997 10:47:18 -0500
> I'm using Performer1.2 and Performer2.0 and creating VR simulator
> system. I am trying to add motion blur effect to my simulator.
>
> I know how to get motion blur effect with Accumlation Buffer on
> GL(IRISGL and OpenGL). But, I don't know how to use Accumlation
> Buffer on Performer.
>
> Please tell me follows.
>
> (1)How to setup Accumlation Buffer ?
>
> (2)Where can I call acbuf(IRISGL) or glAccum(OpenGL) function ?
>
> (3)Is there any sample source code ?
Here are a few simple modifications to the C++ version of simple.C to
help you understand how to use the Accumulation buffer with Performer
and IrisGL.
Have fun...
// PipeConfigFunc() -- To configure the Frame Buffer
static void
PipeConfigFunc(pfPipeWindow *pw)
{
pw->open();
acsize(16);
gconfig();
acbuf(AC_CLEAR,0.0f);
}
// DrawFunc() -- Channel DRAW process callback
static void
drawFunc(pfChannel *chan, void *)
{
chan->clear();
chan->drawStats();
pfDraw();
acbuf(AC_MULT, scale);
acbuf(AC_ACCUMULATE, 1.0f - scale);
acbuf(AC_RETURN, 1.0f);
}
// Main() -- Main program
int
main (int argc, char *argv[])
{
...
// Configure and open a GL window
pfPipe *p = pfGetPipe(0);
pfPipeWindow *pw = new pfPipeWindow(p);
pw->setName("IRIS Performer");
pw->setOriginSize(0,0,640,480);
pw->setConfigFunc(PipeConfigFunc);
pw->config();
// Create and configure a pfChannel.
pfChannel *chan = new pfChannel(p);
chan->setScene(scene);
chan->setFOV(45.0f, 0.0f);
chan->setTravFunc(PFTRAV_DRAW,drawFunc);
...
}
--
Bernard Leclerc, Technical Leader, 3-D Graphics Applications
CAE Electronics Ltd. (http://www.cae.ca)
8585 Cote De Liesse, Saint-Laurent, Quebec, Canada, H4L-4X4
tel: +1 514 341 2000 extension 2275, fax: +1 514 340 5496
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