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POHow make a game loop on the iPhone without using NSTimer
 

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    <p>In order to cleanly port my game to the iPhone, I'm trying to make a game loop that doesn't use NSTimer.</p> <p>I noticed in some sample code that, if using NSTimer, you'd set it up at the beginning with something like</p> <pre><code> self.animationTimer = [NSTimer scheduledTimerWithTimeInterval:animationInterval target:self selector:@selector(drawView) userInfo:nil repeats:YES]; </code></pre> <p>where drawView would look something like:</p> <pre><code> - (void)drawView { glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer); mFooModel->render(); glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer); [context presentRenderbuffer:GL_RENDERBUFFER_OES]; } </code></pre> <p>When using this technique mFooModel renders fine, but I instead want to make my own game loop that calls drawView instead of having NSTimer call drawView 60 times a second. I would like something like:</p> <pre><code> while(gGameState != kShutDown) { [self drawView] } </code></pre> <p>Unfortunately when I do this, all I get is a black screen. Why does this happen? Is there anyway I can implement what I'm describing here?</p> <p>The reason I want to avoid NSTimer is because I want to do physics and AI updates in the game loop. I use my own clock/timer to keep track of the amount of time that has elapsed so that I can do this accurately. Rendering happens as fast as possible. I try to use some of the techniques as described in <a href="http://dewitters.koonsolo.com/gameloop.html" rel="noreferrer">this article</a></p> <p>This is somewhat of an impulsive question (the one you do after you've been coding all day, get stuck, and hope the answer is there by morning)</p> <p>Cheers guys.</p>
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