static PtBuffer onePathToIntervalsOfFixedLength(OnePath path, double segmentLength) {
  if (path == null) null;
  new PtBuffer out;
  
  int iPath = 0, lPath = path.size();
  var it = path.pointIterator();
  Pt p = it.next(), lastPoint = p;
  while true {
    int iPath2 = iPath;
    while (it.hasNext() && (iPath2 == iPath
      || p.minus(lastPoint).length()+.5 < segmentLength)) {
      p = it.next();
      iPath2++;
    }
    
    if (iPath2 == iPath) break;
    
    out.add(p);
    lastPoint = p;
  }
  ret out;
}