cproj.h

来自「GIS系统支持库Geospatial Data Abstraction Libr」· C头文件 代码 · 共 36 行

#include <math.h>

#ifdef __cplusplus
extern "C" {
#endif

#define PI 	3.141592653589793238
#define HALF_PI (PI*0.5)
#define TWO_PI 	(PI*2.0)
#define EPSLN	1.0e-10
#define R2D     57.2957795131
/*
#define D2R     0.0174532925199
*/
#define D2R     1.745329251994328e-2
#define S2R	4.848136811095359e-6

#define OK	0
#define ERROR  -1
#define IN_BREAK -2

/* Misc macros
  -----------*/
#define SQUARE(x)       x * x   /* x**2 */
#define CUBE(x)     x * x * x   /* x**3 */
#define QUAD(x) x * x * x * x   /* x**4 */

#define GMAX(A, B)      ((A) > (B) ? (A) : (B)) /* assign maximum of a and b */
#define GMIN(A, B)      ((A) < (B) ? (A) : (B)) /* assign minimum of a and b */

#define IMOD(A, B)      (A) - (((A) / (B)) * (B)) /* Integer mod function */

#ifdef __cplusplus
}
#endif