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M_PI, M_SQRT2
#include <vigra/mathutil.hxx>
Since M_PI
and M_SQRT2
are not officially standardized, we provide definitions here for those compilers that don't support them.
#ifndef M_PI # define M_PI 3.14159265358979323846 #endif #ifndef M_SQRT2 # define M_SQRT2 1.41421356237309504880 #endif
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