vigra - Mathematical Constants

[ VIGRA Homepage | Function Index | Class Index | Namespaces | File List | Main Page ]

Mathematical Constants |

`M_PI, M_SQRT2 etc.`

#include <vigra/mathutil.hxx>

Since mathematical constants such as `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_2_PI   0.63661977236758134308
        #endif

        #ifndef M_PI_2
        #    define M_PI_2   1.57079632679489661923
        #endif

        #ifndef M_PI_4
        #    define M_PI_4   0.78539816339744830962
        #endif

        #ifndef M_SQRT2
        #    define M_SQRT2  1.41421356237309504880
        #endif

        #ifndef M_EULER_GAMMA
        #    define M_EULER_GAMMA  0.5772156649015329
        #endif

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.9.0 (Tue Nov 6 2012)