EVOLUTION-MANAGER

Edit File: PJ_eck5.c

#define PJ_LIB__ #include <math.h> #include "projects.h" PROJ_HEAD(eck5, "Eckert V") "\n\tPCyl, Sph."; #define XF 0.44101277172455148219 #define RXF 2.26750802723822639137 #define YF 0.88202554344910296438 #define RYF 1.13375401361911319568 static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */ XY xy = {0.0,0.0}; (void) P; xy.x = XF * (1. + cos(lp.phi)) * lp.lam; xy.y = YF * lp.phi; return xy; } static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */ LP lp = {0.0,0.0}; (void) P; lp.lam = RXF * xy.x / (1. + cos( lp.phi = RYF * xy.y)); return lp; } PJ *PROJECTION(eck5) { P->es = 0.0; P->inv = s_inverse; P->fwd = s_forward; return P; }