//
// Written by Curtis Olson, started October 1998.
//
-// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
+// Copyright (C) 1998 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
if(Nmaxima > 2)
{
ld=log(varmaxima[1]/varmaxima[2]); //logarithmic decrement
- zeta=ld/sqrt(4*PI*PI +ld*ld); //damping ratio
+ zeta=ld/sqrt(4*LS_PI*LS_PI +ld*ld); //damping ratio
omegad=1/(vm_times[2]-vm_times[1]); //damped natural frequency Hz
if(zeta < 1)
{