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PORendering rotated rectangles from box2dweb in pixi.js
 

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  1. PORendering rotated rectangles from box2dweb in pixi.js
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    <p>I am writing my own renderer for box2dweb and I decided I would like to use pixi.js.</p> <p>I am able to render rectangles, but only if they aren't rotated - if they are, the animation is messed up. It looks like this (one on the left is debug renderer from box2d, one on the right is mine): <a href="http://scr.hu/0ozr/o552x" rel="nofollow">http://scr.hu/0ozr/o552x</a></p> <p>I know that I need to set up the pivot for graphics object in pixi, but I don't know how to access coordinates of the point that box is rotated around from box2d.</p> <p>I guess I need to use contact constraint of some form, but how do I access it?</p> <p>This is part of the code that creates pixi graphic object for the polygon: (I need to translate all vertices to coordinate system with start in left upper corner of the polygon bounding box, because PIXI uses this kind of coordinate system).</p> <pre><code>getModel : function(body) { var that = this; var model = new PIXI.Graphics(); model.beginFill(0xFFFFFF); var box = physHelpers.getBoundingBox(body); model.position.x = box.x * that.scale; model.position.y = box.y * that.scale; var vertices = physHelpers.getTranslatedVertices(body); model.moveTo(vertices[0].x * that.scale, vertices[0].y * that.scale); for(var i = 1 ; i &lt; vertices.length ; i++){ model.lineTo(vertices[i].x*that.scale, vertices[i].y*that.scale); } model.pivot = new PIXI.Point(box.width/2,model.height/2); model.rotation = body.GetBody().GetAngle(); model.endFill(); return model; } </code></pre>
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