constants.hpp
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```00001
00008 /*****************************************************************************
00009 ** Ifdefs
00010 *****************************************************************************/
00011
00012 #ifndef ECL_MATH_CONSTANTS_HPP_
00013 #define ECL_MATH_CONSTANTS_HPP_
00014
00015 /*****************************************************************************
00016 ** Includes
00017 *****************************************************************************/
00018
00019 #include <cmath>
00020
00021 /*****************************************************************************
00022 ** Namespaces
00023 *****************************************************************************/
00024
00025 namespace ecl {
00026
00027 #ifdef M_PI // defined by all POSIX systems and some non-POSIX ones
00028         double const pi = M_PI;
00029         const double two_pi  = 2.0*pi;
00030         const double pi_2    = pi/2.0;
00031         const double pi_4    = pi/4.0;
00032         const float  two_pi_f= two_pi;
00033         const float  pi_f    = pi;
00034         const float  pi_2_f  = pi_2;
00035         const float  pi_4_f  = pi_4;
00036 #else
00037         double const pi = 4.0*std::atan(1.0);
00038         const double two_pi  = 2.0*pi;
00039         const double pi_2    = pi/2.0;
00040         const double pi_4    = pi/4.0;
00041         const float  two_pi_f= two_pi;
00042         const float  pi_f    = pi;
00043         const float  pi_2_f  = pi_2;
00044         const float  pi_4_f  = pi_4;
00045 #endif
00046
00047 // Above method of setting is more intelligent.
00048 //const double two_pi  = 6.283185307179586476925286766559005768394338798750211641949888;  /**< @brief Mathematical constant for 2*pi. */
00049 //const double pi      = 3.141592653589793238462643383279502884197169399375105820974944;  /**< @brief Mathematical constant for pi. */
00050 //const double pi_2    = 1.57079632679489661923;  /**< @brief Mathematical constant for pi/2. */
00051 //const double pi_4    = 0.78539816339744830962;  /**< @brief Mathematical constant for pi/4. */
00052 //const float  two_pi_f= 6.283185307179586476925286766559005768394338798750211641949888;  /**< @brief Mathematical constant (float format) for 2*pi. */
00053 //const float  pi_f    = 3.141592653589793238462643383279502884197169399375105820974944;  /**< @brief Mathematical constant (float format) for pi. */
00054 //const float  pi_2_f  = 1.57079632679489661923;  /**< @brief Mathematical constant (float format) for pi/2. */
00055 //const float  pi_4_f  = 0.78539816339744830962;  /**< @brief Mathematical constant (float format) for pi/4. */
00056
00057
00058 }; // namespace ecl
00059
00060 #endif /*ECL_MATH_CONSTANTS_HPP_*/
```

ecl_math
Author(s): Daniel Stonier
autogenerated on Mon Jul 3 2017 02:21:34