diff options
Diffstat (limited to 'src/projects.h')
| -rw-r--r-- | src/projects.h | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/projects.h b/src/projects.h index 2957f848..e7b62700 100644 --- a/src/projects.h +++ b/src/projects.h @@ -92,11 +92,21 @@ extern double hypot(double, double); # define hypot _hypot #endif - /* some useful constants */ -#define HALFPI 1.5707963267948966 -#define FORTPI 0.78539816339744833 -#define PI 3.14159265358979323846 -#define TWOPI 6.2831853071795864769 +/* enable predefined math constants M_* for MS Visual Studio workaround */ +#ifdef _MSC_VER +#define _USE_MATH_DEFINES +#endif + +/* some more useful math constants and aliases */ +#define M_FORTPI M_PI_4 /* pi/4 */ +#define M_HALFPI M_PI_2 /* pi/2 */ +/* M_PI pi */ +#define M_PI_HALFPI 4.71238898038468985766 /* 1.5*pi */ +#define M_TWOPI 6.28318530717958647693 /* 2*pi */ +#define M_TWO_D_PI M_2_PI /* 2/pi */ +#define M_TWOPI_HALFPI 7.85398163397448309616 /* 2.5*pi */ +/* M_SQRT2 sqrt(2) */ + /* maximum tag id length for +init and default files */ #ifndef ID_TAG_MAX |