Raphael js, how to get a circle's center x, y position?

问题

If I have a circle object

var c = paper.circle(...)

I would like to get this circle's center x, y position, how to get?

回答1:

You can get the SVG attributes of cx and cy with:

c.attr('cx');

回答2:

Do something like:

var c = paper.circle(...);
var centerX = c.attr('x') + c.attr('width') / 2;
var centerY = c.attr('y') + c.attr('height') / 2;

来源：https://stackoverflow.com/questions/5618794/raphael-js-how-to-get-a-circles-center-x-y-position