Exception: PolyBool: Zero-length segment detected; your epsilon is probably too small or too large

[moodstubos]

Thanks for this package!

Unfortunately I get this error with some (valid) coordinates.

polybool 0.2.0

Here is a simple example:

import 'package:polybool/polybool.dart';

void main(args) {
  var poly1 = Polygon(regions: [
    [
      Coordinate(3.73333333, 44.01666667),
      Coordinate(3.96666667, 43.76666667),
      Coordinate(4.2658333333333, 43.7538888888889),
      Coordinate(4.2555555555556, 43.8111111111111),
      Coordinate(4.2333333333333, 43.8425),
      Coordinate(4.2133333333333, 43.8805555555556),
      Coordinate(4.2130555555556, 43.8902777777778),
      Coordinate(4.2086111111111, 43.9022222222222),
      Coordinate(4.1825, 43.915),
      Coordinate(4.2166666666667, 43.9222222222222),
      Coordinate(4.2333333333333, 43.9333333333333),
      Coordinate(3.73333333, 44.01666667)
    ]
  ]);

  var poly2 = Polygon(regions: [
    [
      Coordinate(4.01388889, 43.95555556),
      Coordinate(3.96805556, 43.85833333),
      Coordinate(4.05555556, 43.84396135),
      Coordinate(4.15555556, 43.82753623),
      Coordinate(4.25555556, 43.81111111),
      Coordinate(4.29444444, 43.80555556),
      Coordinate(4.34027778, 43.90138889),
      Coordinate(4.21666667, 43.92222222),
      Coordinate(4.01388889, 43.95555556),
      Coordinate(4.01388889, 43.95555556)
    ]
  ]);

  final diff = poly1.difference(poly2);
}

Unhandled exception:
Exception: PolyBool: Zero-length segment detected; your epsilon is probably too small or too large
#0      Intersecter.calculate_INTERNAL (package:polybool/src/intersector.dart:333:11)
#1      Intersecter.calculateXD (package:polybool/src/intersector.dart:87:12)
#2      Polygon._combine (package:polybool/src/polygon.dart:60:21)
#3      Polygon._operate (package:polybool/src/polygon.dart:36:18)
#4      Polygon.difference (package:polybool/src/polygon.dart:24:12)
#5      main (bin/polybool_exception_test.dart:36:22)
#6      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:295:33)
#7      _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)

[mohammedX6]

Hi

Try to make your coordinates to have max of 5 decimal points at max

For example:

4.2658333333333

Should be:

4.26583

[moodstubos]

@mohammedX6
That works - thanks you!
Perhaps this could be implemented into this package?

double precision(double d) {
  String inString = d.toStringAsFixed(5);
  return double.parse(inString);
}