How to sleep() for less than a second

I'm pretty new to homebrew Wii development, but I do have plenty of prior experience using C. For the moment I'm just playing around and getting a feel for how things work, trying out basic animations by drawing multiple frames (JPEGs) to screen at a desired rate. But I am having trouble with the sleep() function, where I cannot create a delay between drawing the images less than a second without basically eliminating calling the function. using sleep(.5) or sleep(1/4) gives me the same results as not calling it at all.

Any help would be appreciated.

iirc there's usleep() in which the parameter is the time to pause in microseconds



Edited 1 time(s). Last edit at 07/09/2010 10:45PM by Arikado.

Yeah, I just found that, too. It doesn't seem to work, either. :(. The same effect as if I commented calls to it out.

Perhaps because you're using parameters so small you don't realize it's actually in effect?

Is 4000 too small for usleep()?

I think it's a bad idea to use sleep for animation, you should just skip a bunch a frame. Normally the Wii goes at 60 FPS.

When you sleep every thing will stop, including the controller.

Yeah you can just synchronize it all using VIDEO_WaitVSync()

Oh. I see. In that case, what are the techniques used already in homebrew apps for animations that I should be looking at?

A lot of homebrew are open source. Don't hesitate to look at their code. Here is the list: [wiibrew.org]

Quote
Crayon
Normally the Wii goes at 60 FPS.

On PAL it's 50 FPS.

On GuitarsOnFire I did the strangest thing, I sync animations to the audio. But most of the time using frame counters is good enough, but it will run a bit faster on PAL then on NTSC.

Quote
Crayon
Normally the Wii goes at 60 FPS.

Well, normally the Wii doesn't have a framerate limit at all. This is the case when VIDEO_WaitVSync() isn't used.