Radial gradient origin workaround for Adobe Illustrator Extendscript API

The Ilustrator Extendscript API only provides the origins of radial gradiants as integer coordinates - these functions let you get the origins to unlimited decimal precision.

Usage

Get the origin of a radial gradient in the strokeColor property of a PathItem p, accurate to 6 decimal places:

var origin = getRadialGradientOrigin(p, "strokeColor", 6);
// returns [455.768938567,456.567849567]

Get the origin of the radial gradients in the strokeColor property of a PathItem p1 and the fillColor property of a PathItem p2, accurate to 3 decimal places:

var origins = getRadialGradientOrigins([{
    pathItem: p1,
    colorPropertyName: "strokeColor"
},
{
    pathItem: p2,
    colorPropertyName: "fillColor"
}], 3);
// returns [[455.768938567,456.567849567],[4364.565859, 6.3733303]]

Using getRadialGradientOrigins for multiple gradients will have better performance than repeatly calling getRadialGradientOrigin due to the lower number of Illustrator redraws required.