定义数学几何库的常量和宏 更多...
#include <math.h>
mgdef.h 的引用(Include)关系图:
此图展示该文件直接或间接的被哪些文件引用了:
宏定义 | |
| #define | _SIZE_T |
| #define | isnan(x) ((x)!=(x)) |
类型定义 | |
| typedef unsigned long | size_t |
函数 | |
| template<class _T > | |
| bool | mgIsZero (_T v) |
| 判断一个浮点数是否可以认为是零 更多... | |
| template<class _T > | |
| bool | mgEquals (_T v1, _T v2) |
| 判断两个浮点数是否相等 更多... | |
| template<class _T > | |
| const _T & | mgMin (const _T &t1, const _T &t2) |
| template<class _T > | |
| const _T & | mgMax (const _T &t1, const _T &t2) |
| template<class _T > | |
| void | mgSwap (_T &t1, _T &t2) |
| template<class _T > | |
| bool | mgCopy (_T &t1, _T t2) |
| template<class _T > | |
| _T | mgHypot (_T x, _T y) |
| 求直角三角形的斜边长度 更多... | |
| template<class _T > | |
| _T | mgSquare (_T x, _T y) |
| template<class _T > | |
| int | mgRound (_T d) |
| 对一个浮点数四舍五入到整数 更多... | |
变量 | |
| const float | _MGZERO = 2e-6f |
| 定义可以视为零的极小数 更多... | |
| const float | _M_E = 2.71828182845904523536028747135266f |
| e 更多... | |
| const float | _M_LOG2E = 1.4426950408889634073599246810019f |
| log2(e) 更多... | |
| const float | _M_LOG10E = 0.434294481903251827651128918916605f |
| log(e) 更多... | |
| const float | _M_LN2 = 0.693147180559945309417232121458177f |
| ln(2) 更多... | |
| const float | _M_LN10 = 2.30258509299404568401799145468436f |
| ln(10) 更多... | |
| const float | _M_PI = 3.14159265358979323846264338327950288419716939937511f |
| 圆周率PI，180° 更多... | |
| const float | _M_PI_2 = 1.57079632679489661923132169163975144209858469968756f |
| PI/2，90° 更多... | |
| const float | _M_PI_4 = 0.785398163397448309615660845819875721049292349843778f |
| PI/4，45° 更多... | |
| const float | _M_1_PI = 0.318309886183790671537767526745028724068919291480913f |
| 1/PI 更多... | |
| const float | _M_2_PI = 0.636619772367581343075535053490057448137838582961826f |
| 2/PI 更多... | |
| const float | _M_2_SQRTPI = 1.12837916709551257389615890312155f |
| 2/sqrt(PI) 更多... | |
| const float | _M_SQRT2 = 1.41421356237309504880168872420969807856967187537695f |
| sqrt(2) 更多... | |
| const float | _M_SQRT1_2 = 0.707106781186547524400844362104849039284835937688474f |
| sqrt(2)/2 更多... | |
| const float | _M_2PI = 6.28318530717958647692528676655900576839433879875022f |
| 2PI，360° 更多... | |
| const float | _M_PI_3 = 1.04719755119659774615421446109316762806572313312504f |
| PI/3，60° 更多... | |
| const float | _M_PI_6 = 0.523598775598298873077107230546583814032861566562518f |
| PI/6，30° 更多... | |
| const float | _M_D2R = 0.0174532925199432957692369076848861271344287188854173f |
| 度到弧度的转换常数，PI/180 更多... | |
| const float | _M_R2D = 57.2957795130823208767981548141051703324054724665643f |
| 弧度到度的转换常数，180/PI 更多... | |
| const float | _M_1_SQRPI = 0.564189583547756286948079451560773f |
| 1/sqrt(PI) 更多... | |
| const float | _FLT_MIN = 1.175494351e-38F |
| 单精度浮点数最小绝对值 更多... | |
| const float | _FLT_MAX = 3.402823466e+38F |
| 单精度浮点数最大绝对值 更多... | |
详细描述
定义数学几何库的常量和宏