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SVG.BBox = function(element) {
/* actual, native bounding box */
var box = element.node.getBBox()
/* include translations on x an y */
this.x = box.x + element.trans.x
this.y = box.y + element.trans.y
/* add the center */
this.cx = box.x + element.trans.x + box.width / 2
this.cy = box.y + element.trans.y + box.height / 2
/* plain width and height */
this.width = box.width
this.height = box.height
}
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