GRASS GIS 7 Programmer's Manual
7.2.0(2016)-exported
pi.h
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#ifndef __PI_H__
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#define __PI_H__
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#include <grass/gis.h>
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#define Radians(x) ((x) * M_PI/180.0)
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#define Degrees(x) ((x) * 180.0/M_PI)
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#endif
/* __PI_H__ */
gis
pi.h
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