updateMinDistance method
Implementation
void updateMinDistance(List<GeometryLocation?> locGeom, bool flip) {
// if not set then don't update
if (locGeom[0] == null) return;
if (flip) {
minDistanceLocation![0] = locGeom[1]!;
minDistanceLocation![1] = locGeom[0]!;
} else {
minDistanceLocation![0] = locGeom[0]!;
minDistanceLocation![1] = locGeom[1]!;
}
}