ref: 82c08a8a4469c4b4ba515d74addc7aac747a17d9
dir: /sys/src/cmd/map/map.h/
#pragma lib "/sys/src/cmd/map/libmap/libmap.a$O" #pragma src "/sys/src/cmd/map/libmap" #ifndef PI #define PI 3.1415926535897932384626433832795028841971693993751 #endif #define TWOPI (2*PI) #define RAD (PI/180) #define ECC .08227185422 /* eccentricity of earth */ #define EC2 .006768657997 #define FUZZ .0001 #define UNUSED 0.0 /* a dummy double parameter */ struct coord { double l; /* lat or lon in radians*/ double s; /* sin */ double c; /* cos */ }; struct place { struct coord nlat; struct coord wlon; }; typedef int (*proj)(struct place *, double *, double *); struct index { /* index of known projections */ char *name; /* name of projection */ proj (*prog)(double, double); /* pointer to projection function */ int npar; /* number of params */ int (*cut)(struct place *, struct place *, double *); /* function that handles cuts--eg longitude 180 */ int poles; /*1 S pole is a line, 2 N pole is, 3 both*/ int spheroid; /* poles must be at 90 deg if nonzero */ int (*limb)(double *lat, double *lon, double resolution); /* get next place on limb */ /* return -1 if done, 0 at gap, else 1 */ }; proj aitoff(void); proj albers(double, double); int Xazequalarea(struct place *, double *, double *); proj azequalarea(void); int Xazequidistant(struct place *, double *, double *); proj azequidistant(void); proj bicentric(double); proj bonne(double); proj conic(double); proj cylequalarea(double); int Xcylindrical(struct place *, double *, double *); proj cylindrical(void); proj elliptic(double); proj fisheye(double); proj gall(double); proj gilbert(void); proj globular(void); proj gnomonic(void); int guycut(struct place *, struct place *, double *); int Xguyou(struct place *, double *, double *); proj guyou(void); proj harrison(double, double); int hexcut(struct place *, struct place *, double *); proj hex(void); proj homing(double); int hlimb(double*, double*, double resolution); proj lagrange(void); proj lambert(double, double); proj laue(void); proj lune(double, double); proj loxodromic(double); /* not in library */ proj mecca(double); int mlimb(double*, double*, double resolution); proj mercator(void); proj mollweide(void); proj newyorker(double); proj ortelius(double, double); /* not in library */ int Xorthographic(struct place *place, double *x, double *y); proj orthographic(void); int olimb(double*, double*, double); proj perspective(double); int plimb(double*, double*, double resolution); int Xpolyconic(struct place *, double *, double *); proj polyconic(void); proj rectangular(double); proj simpleconic(double, double); int Xsinusoidal(struct place *, double *, double *); proj sinusoidal(void); proj sp_albers(double, double); proj sp_mercator(void); proj square(void); int Xstereographic(struct place *, double *, double *); proj stereographic(void); int Xtetra(struct place *, double *, double *); int tetracut(struct place *, struct place *, double *); proj tetra(void); proj trapezoidal(double, double); proj vandergrinten(void); proj wreath(double, double); /* not in library */ void findxy(double, double *, double *); void albscale(double, double, double, double); void invalb(double, double, double *, double *); void cdiv(double, double, double, double, double *, double *); void cmul(double, double, double, double, double *, double *); void cpow(double, double, double *, double *, double); void csq(double, double, double *, double *); void csqrt(double, double, double *, double *); void ccubrt(double, double, double *, double *); double cubrt(double); int elco2(double, double, double, double, double, double *, double *); void cdiv2(double, double, double, double, double *, double *); void csqr(double, double, double *, double *); void orient(double, double, double); void latlon(double, double, struct place *); void deg2rad(double, struct coord *); void sincos(struct coord *); void normalize(struct place *); void invert(struct place *); void norm(struct place *, struct place *, struct coord *); void printp(struct place *); void copyplace(struct place *, struct place *); int picut(struct place *, struct place *, double *); int ckcut(struct place *, struct place *, double); double reduce(double); void getsyms(char *); int putsym(struct place *, char *, double, int); void filerror(char *s, char *f); void error(char *s); int doproj(struct place *, int *, int *); int cpoint(int, int, int); int plotpt(struct place *, int); int nocut(struct place *, struct place *, double *); extern int (*projection)(struct place *, double *, double *);