Brian Furtaw (brian++at++dingbat.clubfed.sgi.com)
Mon, 11 Jan 1999 06:43:26 -0500
You could use pfuSaveImage in a draw callback,
man pfuSaveImage yeilds....
int pfuSaveImage(char* name, int xorg, int yorg, int xsize, int ysize,
int alpha);
Use it in a draw callback like this....
void DrawChannel(pfChannel *channel, void *data)
{
char fileName[64];
sprintf(fileName, "frame%03d.rgb", pfGetFrameCount());
/* erase framebuffer and draw Earth-Sky model */
channel->clear();
/* invoke Performer draw-processing for this frame */
pfDraw();
pfuSaveImage(fileName, 0, 0, 1024 , 1024, 0);
/* draw Performer throughput statistics */
if (drawStats)
pfDrawChanStats(channel);
}
You have to setup your channel(s) to call the callback.....
pfChannel *achan = new pfChannel;
achan->setTravFunc(PFTRAV_DRAW, DrawChannel);
I must warn you copy back of the framebuffer is painfully slow. The best way to
do this is send it to video and save it on a video tape. If you are just
copying a frame or two it won't be to bad. Perfly has a feature which uses
pfuSaveImage() to copyback frames when you hit a key stroke.
Brian
On Jan 8, 1:18pm, DOUGLAS_MASHEK++at++udlp.com wrote:
> Subject: Saving frames in performer 2.2
>
> Hi,
>
> We're running Division, Coryphaeus, and a few Performer Demos, and we
> would like to know how to get performer to render the frames, and then
> dump them to files. Is this possible? If so, how? Will it take
> modification to the applications, or is there some hooks to performer
> 2.2 that will let me control that from another program? I want the
> capture to happen in a syncronized fassion, when each frame is fully
> rendered.
>
> If anyone has done this, I shure could use some help. I'm a novice to
> Performer programming, but I have a 3-Pipe Onyx2, and an Onyx2 IR
> deskside that we want to capture the images from.
>
> Any help would be appreciated.
>
>
> Thanks,
> Doug
>
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>-- End of excerpt from DOUGLAS_MASHEK++at++udlp.com
--
----oOOo---- ----oOOo---- ----oOOo---- ----oOOo----
Brian Furtaw (brian++at++sgi.com)
VisSim Technical Consultant Office:(301)572-3293 Fax: (301)872-3293
12200-G Plum Orchard Drive OpenGL/Performer/OpenInventor/ImageVision
Silver Spring, Maryland 20904 Optimizer/React/PCI Device Drivers
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