javascript - SVG Circle Stroke Origin -

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I'm having trouble describing this problem, but here goes:

I make I am trying to get a SVG Circle Progress Bar and I have found a perfect example that I want to photograph without any third part libraries:

The problem is That I am getting a realization of the change of the origin of the stroke, as you will see, if you see it Es, then the original right hand I need to come up to it.

Now, I am a developer, so I tried to do myself, but I can not understand how to do it for my life. If I change the stroke-Dashaharru feature then the stroke-dash offset will not match the percentage set.

I think it comes down to mathematics with stroke-class values, but I do not quite understand what to do.

DashOffets are calculated as follows: 

  var pct = ((100-val) / 100) * (Math.PI * (r * 2)) ;

and there should be some kind of correlation between that standard and standard bracket value 565.48. There is no mention of it anywhere.

call it 2 & lt; Add to circle ... in SVG & gt; & Lt; / Circle & gt; 

  conversion = "swirl (270,100,100)"


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