arcLengthAsync function

Future<double> arcLengthAsync(
  1. VecPoint curve,
  2. bool closed
)

ArcLength calculates a contour perimeter or a curve length.

For further details, please see:

https:///docs.opencv.org/master/d3/dc0/group__imgproc__shape.html#ga8d26483c636be6b35c3ec6335798a47c

Implementation

Future<double> arcLengthAsync(VecPoint curve, bool closed) async {
  final p = calloc<ffi.Double>();
  return cvRunAsync0(
    (callback) => cimgproc.cv_arcLength(curve.ref, closed, p, callback),
    (c) {
      final rval = p.value;
      calloc.free(p);
      return c.complete(rval);
    },
  );
}