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copied!<p>With a newer jQuery v. you don't have to target all the <strong>-browser-specific</strong> properties.<br> Use just <code>transform</code>.</p> <p><kbd><strong><a href="http://jsbin.com/ifezoq/1/edit" rel="nofollow">LIVE DEMO</a></strong></kbd></p> <pre><code>var dragging = false; $(function() { var target = $('#target'); var mainTarget = $('#mainTarget'); var rad = mainTarget.width()/2; var elOfs = mainTarget.offset(); var elPos = { x: elOfs.left, y: elOfs.top }; target.mousedown(function() { dragging = true; }); $(document).mouseup(function() { dragging = false; }); $(document).mousemove(function(e) { if (dragging) { var mPos = { x: e.pageX-elPos.x, y: e.pageY-elPos.y }; var getAtan = Math.atan2(mPos.x-rad, mPos.y-rad); var getDeg = -getAtan/(Math.PI/180) + 135; //135 = (180deg-45deg) mainTarget.css({transform: 'rotate(' + getDeg + 'deg)'}); } }); }); </code></pre> <p>Ideally you could do something like this:</p> <p><a href="http://jsbin.com/ifezoq/2/edit" rel="nofollow">http://jsbin.com/ifezoq/2/edit</a></p> <pre><code>$(function() { var dragging = 0; var target = $('#target'); var mainTarget = $('#mainTarget'); var elOfs = mainTarget.offset(); var cent = {X: mainTarget.width()/2, Y: mainTarget.height()/2}; var elPos = {X: elOfs.left, Y: elOfs.top}; target.mousedown(function() { dragging = true; }); $(document).mouseup(function() { dragging = 0; }).mousemove(function(e) { if(dragging) { var mPos = {X: e.pageX-elPos.X, Y: e.pageY-elPos.Y}; var getAtan = Math.atan2(mPos.X-cent.X, mPos.Y-cent.Y); var getDeg = -getAtan/(Math.PI/180) + 135; mainTarget.css({transform: 'rotate(' + getDeg + 'deg)'}); } }); }); </code></pre> <p>but that would be in case you got a square image inside a circle, where the draggable corner is always at 45deg.<br> But as you can see the gap is to get the starting angle difference when handling rectangles, - you need to apply additional math, which is not needed if you ask me, so I suggest the first demo.</p>

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