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View Full Version : Has opengl got timer functions?



06-14-2001, 05:35 PM
Hi, I'm messing around with opengl's 2d orthog mode and I've been trying to draw a gravity simulation, everything is working but it's going far too fast, and I'm getting flicker (which i presume is to do with the differences in monitor refresh rate and draw speed), and I was wondering if opengl or any of the vc++ librarys have a function that can return the time in milliseconds from the start of the program, or something like that? I could use this to maintain a constant delay between drawing... or is there an easier way? I'm not using mfc btw..

Thanks heaps, sincerely - Andrew

rts
06-14-2001, 06:21 PM
Check out glutTimerFunc

GLUTAPI void GLUTAPIENTRY glutTimerFunc(unsigned int millis, void (GLUTCALLBACK *func)(int value), int value);

ffish
06-14-2001, 06:54 PM
Flickering may be due to your app running in single buffered mode. If your using GLUT, try glutInitDisplayMode( ... | GLUT_DOUBLE); and put a glutSwapBuffers(); at the end of your drawing function. If you're not using GLUT, each windowing API will have method of turning double buffering on.

Hope that helps.