getArcLength method
Implementation
double getArcLength({int? numSamplePoints}) {
numSamplePoints ??= 4 * getNumCurves() + 1;
var points = [
for (var alpha
in linspace(start: 0, end: 1, count: numSamplePoints).getColumn(0))
pointFromProportion(alpha)
];
var diffs = [
for (var i in range(end: numSamplePoints - 1)) points[i + 1] - points[i]
];
var norms = diffs.map((v) => v.norm()).toList();
return sum(norms);
}