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PORequestAnimationFrame call time changes depending on my canvas size
 

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  1. PORequestAnimationFrame call time changes depending on my canvas size
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    <p>On my application, I have a canvas which CSS size (CSS, not html) updates depending on the window size.</p> <p>I have a main gameplayLoop which looks like this :</p> <pre><code>run = function(){ console.log(timerDiff(frameTime)); game.inputManage(); game.logics(); game.graphics.animate(); game.graphics.render(); frameTime = timerInit(); requestAnimFrame(run); } </code></pre> <p>My requestAnimFrame function is the one from Paul Irish :</p> <pre><code>window.requestAnimFrame = (function(){ return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function( callback ){ window.setTimeout(callback, 1000 / 60); }; })(); </code></pre> <p>So basically the problem is that the timer that I log which measures the time between the requestAnimFrame call and the effective function call totally changes. If my browser is in fullscreen I get like 50/60 ms, and if I have a small window I can get to something like 10 ms.</p> <p>As the requestAnimFrame call is supposed to call constantly the function under a 60fps rythm (which is something like 30 ms I think) I shouldn't have this kind of result, since there is basically nothing happening between the timer's creation and its check, except the requestAnimFrame</p> <p>I also have some recurring micro-freezes (less than a second) which happens like every 2/3 seconds. But the timer doesn't detect any change in the time (like even the time counter of javascript is blocked)</p> <p>My timers functions are like this but it doesn't really matter here</p> <pre><code>timerInit = function() { return new Date(); } timerDiff = function(datePrev) { return new Date().getTime() - datePrev.getTime(); } </code></pre>
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    1. USMalharhak
    1. USMalharhak
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      1. USMatt Greer
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    1. COYour entire approach is flawed, `requestAnimationFrame` does not have a pre-cooked framerate, it will "request" the next "animation frame" as soon as it is called.
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      1. UScircusbred
    2. COrequestAnimationFrame is locked to the vertical sync in Chrome by default. I *think* that is the case in Firefox too. So in most situations, `requestAnimationFrame` results in 60fps (assuming your code can keep up, of course).
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      1. USMatt Greer
    3. COGood question. My game also "freezes" about every 3 seconds and I am also using `requestAnimationFrame`. I naively thought it was the garbage collector, even though I allocate basically no objects.
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      1. USMatt Greer
 

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