run("Fit Spline", "straighten");
  getSelectionCoordinates(x, y);
  x2=0; y2=0; distance=0;
  for (i=0; i<x.length; i++) {
      if (i>0) {
         dx = x[i] - x[i-1];
         dy = y[i] - y[i-1];
         distance = sqrt(dx*dx+dy*dy);
      }
      print(i, x[i], y[i], distance);
  }