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POHow to make object rotate with drag, how to get a rotate point around the origin use sin or cos?
 

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  1. POHow to make object rotate with drag, how to get a rotate point around the origin use sin or cos?
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    <p>I've been searching long time, but can't find a better way solve my problem,<br> make div draggable, rotate and resize by each handle like these 2 example <a href="http://vremenno.net/examples/jquery-ui-rotation/" rel="nofollow noreferrer">1</a> <a href="http://fabricjs.com/kitchensink/" rel="nofollow noreferrer">2</a>,, now it can be draggable, but rotate..</p> <p>Regarding <a href="https://stackoverflow.com/a/10330295/1775888">Prasanth K C</a>, <a href="https://stackoverflow.com/a/11067482/1775888">Chango</a>, <a href="https://stackoverflow.com/a/3438798/1775888">Yi Jiang</a> ..'s answer, these code maybe not correct,<br> <strong>1. it should have a rotate point around the origin.<br> 2. need to consider radius.</strong><br> But I don't know how to use sin or cos here to make rotate consider radius?<br> Any suggestion will be be appreciated. <a href="http://jsfiddle.net/tBgLh/8/" rel="nofollow noreferrer">http://jsfiddle.net/tBgLh/8/</a></p> <pre><code>var dragging = false, target_wp; $('.handle').mousedown(function(e) { var o_x = e.pageX, o_y = e.pageY; // origin point e.preventDefault(); e.stopPropagation(); dragging = true; target_wp=$(e.target).closest('.draggable_wp'); $(document).mousemove(function(e) { if (dragging) { var s_x = e.pageX, s_y = e.pageY; // start rotate point if(s_x !== o_x &amp;&amp; s_y !== o_y){ //start rotate var s_rad = Math.atan2(s_y, s_x); var degree = (s_rad * (360 / (2 * Math.PI))); target_wp.css('-moz-transform', 'rotate(' + degree + 'deg)'); target_wp.css('-moz-transform-origin', '50% 50%'); target_wp.css('-webkit-transform', 'rotate(' + degree + 'deg)'); target_wp.css('-webkit-transform-origin', '50% 50%'); target_wp.css('-o-transform', 'rotate(' + degree + 'deg)'); target_wp.css('-o-transform-origin', '50% 50%'); target_wp.css('-ms-transform', 'rotate(' + degree + 'deg)'); target_wp.css('-ms-transform-origin', '50% 50%'); } } }) $(document).mouseup(function() { dragging = false }) })// end mousemove </code></pre> <p>html</p> <pre><code>&lt;div class="draggable_wp"&gt; &lt;div class="el"&gt;&lt;/div&gt; &lt;div class="handle"&gt;&lt;/div&gt; &lt;/div&gt; </code></pre>
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    1. COCheck the following link: http://stackoverflow.com/questions/4913622/jquery-rotation-plugin-that-works-like-jquery-ui-resize
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    2. CO@Webars Thanks for reply. I've been check this question before, actually in mine, the smooth rotate example is from [seelts answer](http://stackoverflow.com/a/9158130/1775888) I try to use that plugin but it only can work with jquery ui and old version jquery... and the other plugin I don't know how to drag with handle
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