EVOLUTION-MANAGER

Edit File: PJ_wink1.c

#define PJ_LIB__ #include <errno.h> #include <math.h> #include "projects.h" PROJ_HEAD(wink1, "Winkel I") "\n\tPCyl., Sph.\n\tlat_ts="; struct pj_opaque { double cosphi1; }; static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */ XY xy = {0.0,0.0}; xy.x = .5 * lp.lam * (P->opaque->cosphi1 + cos(lp.phi)); xy.y = lp.phi; return (xy); } static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */ LP lp = {0.0,0.0}; lp.phi = xy.y; lp.lam = 2. * xy.x / (P->opaque->cosphi1 + cos(lp.phi)); return (lp); } PJ *PROJECTION(wink1) { struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque)); if (0==Q) return pj_default_destructor(P, ENOMEM); P->opaque = Q; P->opaque->cosphi1 = cos (pj_param(P->ctx, P->params, "rlat_ts").f); P->es = 0.; P->inv = s_inverse; P->fwd = s_forward; return P; }