/* general forward projection */ #define PJ_LIB__ #include #include # define EPS 1.0e-12 XY /* forward projection entry */ pj_fwd(LP lp, PJ *P) { XY xy; double t; /* check for forward and latitude or longitude overange */ if ((t = fabs(lp.phi)-HALFPI) > EPS || fabs(lp.lam) > 10.) { xy.x = xy.y = HUGE_VAL; pj_ctx_set_errno( P->ctx, -14); } else { /* proceed with projection */ P->ctx->last_errno = 0; pj_errno = 0; errno = 0; if (fabs(t) <= EPS) lp.phi = lp.phi < 0. ? -HALFPI : HALFPI; else if (P->geoc) lp.phi = atan(P->rone_es * tan(lp.phi)); lp.lam -= P->lam0; /* compute del lp.lam */ if (!P->over) lp.lam = adjlon(lp.lam); /* adjust del longitude */ xy = (*P->fwd)(lp, P); /* project */ if ( P->ctx->last_errno ) xy.x = xy.y = HUGE_VAL; /* adjust for major axis and easting/northings */ else { xy.x = P->fr_meter * (P->a * xy.x + P->x0); xy.y = P->fr_meter * (P->a * xy.y + P->y0); } } return xy; }