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#define PROJ_PARMS__ \
double ap;
#define EPS10 1.e-10
#define PJ_LIB__
#include <projects.h>
PROJ_HEAD(tcc, "Transverse Central Cylindrical") "\n\tCyl, Sph, no inv.";
FORWARD(s_forward); /* spheroid */
double b, bt;
b = cos(lp.phi) * sin(lp.lam);
if ((bt = 1. - b * b) < EPS10) F_ERROR;
xy.x = b / sqrt(bt);
xy.y = atan2(tan(lp.phi) , cos(lp.lam));
return (xy);
}
FREEUP; if (P) pj_dalloc(P); }
ENTRY0(tcc) P->es = 0.; P->fwd = s_forward; ENDENTRY(P)
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