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    <p>The arguments to the step function are fixed by the animation infrastructure - you can't add arguments to it as it is called by the infrastructure with a fixed set of arguments. You could make a stub function (kind of like you did) and add arguments and then call your own function.</p> <pre><code>Animator:function(obj,aniArgs,duration,aniEasArgs,delay,stepFunction,completeFunction){ // initialize angle var angle = 0; obj.stop(true,true).animate(aniArgs, {duration:parseInt(duration,10),queue:false,specialEasing:aniEasArgs, step:function(now,fx){ if($.isFunction(stepFunction)){ // convert these args into an array var args = Array.prototype.slice.call(arguments, 0); // add angle onto existing arguments args.push(angle); // call the stepFunction with new arg added on to the end stepFunction.apply(this,args); }; },complete:function(){ if($.isFunction(completeFunction)){ completeFunction.apply(this,arguments); };}}); }; } </code></pre> <p>Or, you can use <code>.data()</code> on the object begin animated to store any variable for the duration of the animation. Set the angle on the object before you start the animation and you should be able to access it and update it from within the step function by referencing <code>$(this).data()</code>. </p> <p>This keeps you from having to use global variables and supports animating multiple objects at the same time.</p> <p>As others have pointed out, a good animation calculates the next position each time based on the elapsed time, not on the number of times the step function has been called. This allows you to stay on-time even if the animation happens to fall behind a little bit due to other things going on in the browser.</p>
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    1. POPass Variable to .animate Step Function
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    1. COGreat workaround idea, but Diego has provide a good solution. Thanks :)
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      1. USAaron
    2. CO@Aaron - it looks like you have a solution now, but see the code example I added to actually add arguments to your stepFunction.
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