add fourpi

knodlseder
1 parent 7b2efd1a
Showing 1 changed file with 1 additions and 0 deletions
src/GTools.hpp
@@ -25,6 +25,7 @@
 const double pi      = 3.1415926535897931159979635;
 const double pihalf  = pi/2.0;
 const double twopi   = 2.0*pi;
+const double fourpi  = 4.0*pi;
 const double deg2rad = 0.0174532925199432954743717;
 const double rad2deg = 57.295779513082322864647722;
 const double ln10    = 2.3025850929940459010936138;