dan@doctor.chem.yale.edu (Dan Severance) (06/11/91)
> Hi, >.. > It does an animation of molecular movement over time, but what I see >is that it starts out running at N frames/second, and then after a couple >minutes it starts to run about half the speed or slower. If I tell the >program to rewind the file and do it again, it keeps running at this slower >speed. Then if I stop and restart the program it runs at the original faster >speed once again, once more slowing down in a couple of minutes... > One thing I've noticed is that doing an osview shows that initially >the graphics fifowait (what is this??) starts small and gradually gets >larger; once it is large (14-15M) the program slows down. Telling the >program to stop animating causes the fifowait to disappear, but continuing >it causes an immediate jump back up to 15M (not the gradual climb seen >at the initial run of the program). Hi again. Well, I had done something wrong, but I still don't understand the behavior. I was inadvertantly drawing 348 zero length vectors using v3f having two endpoints (bgnlin; 2 call v3fs; endlin). Why would this cause the slowing down over time? I'm just curious now since I found the problem, but I'd still like to know if this is the expected behavior or if it is a generally innocuous bug of some sort.... Thanks, Dan Severance dan@omega.chem.yale.edu Laboratory of Computational Chemistry