GRASS Programmer's Manual  6.5.svn(2014)-r66266
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pi.h
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1 #ifndef __PI_H__
2 #define __PI_H__
3 
4 #include <grass/gis.h>
5 
6 #define Radians(x) ((x) * M_PI/180.0)
7 #define Degrees(x) ((x) * 180.0/M_PI)
8 
9 #endif /* __PI_H__ */