/Proj4/PJ_wink1.c

 1#ifndef lint
 2static const char SCCSID[]="@(#)PJ_wink1.c	4.1 94/02/15     GIE     REL";
 3#endif
 4#define PROJ_PARMS__ \
 5	double	cosphi1;
 6#define PJ_LIB__
 7# include	"projects.h"
 8PROJ_HEAD(wink1, "Winkel I") "\n\tPCyl., Sph.\n\tlat_ts=";
 9FORWARD(s_forward); /* spheroid */
10	xy.x = .5 * lp.lam * (P->cosphi1 + cos(lp.phi));
11	xy.y = lp.phi;
12	return (xy);
13}
14INVERSE(s_inverse); /* spheroid */
15	lp.phi = xy.y;
16	lp.lam = 2. * xy.x / (P->cosphi1 + cos(lp.phi));
17	return (lp);
18}
19FREEUP; if (P) pj_dalloc(P); }
20ENTRY0(wink1)
21	P->cosphi1 = cos(pj_param(P->params, "rlat_ts").f);
22	P->es = 0.; P->inv = s_inverse; P->fwd = s_forward;
23ENDENTRY(P)