Polygon.fromPath constructor

Polygon.fromPath(Path path, { int contour = 0, double sampling = 1.0, double? tolerance, })

Constructs the polygon from the given contour of a Path (the first by default).

A polygon only has straight edges, so the curves of the path are approximated. The contour is sampled every sampling along its length, and the samples that are not needed to stay within about half of the sampling of the contour are left out. Higher values give fewer vertices and a looser fit, while straight stretches and the corners between them are exact whatever the sampling is. The given tolerance decides what samples to discard: by default, its value is half the sampling.

See PathMetricExtension.walkContour for the details of the sampling and tolerance parameters.

Implementation

factory Polygon.fromPath(
  Path path, {
  int contour = 0,
  double sampling = 1.0,
  double? tolerance,
}) {
  return Polygon(path.walkContourAt(contour, sampling, tolerance).vertices);
}