00001 #ifndef __PI_H__ 00002 #define __PI_H__ 00003 00004 #include <grass/gis.h> 00005 00006 #define Radians(x) ((x) * M_PI/180.0) 00007 #define Degrees(x) ((x) * 180.0/M_PI) 00008 00009 #endif /* __PI_H__ */