svn-gvsig-desktop / tags / v1_9_Build_1222 / libraries / libjni-proj4 / src / PJ_fahey.c @ 41849
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#ifndef lint
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static const char SCCSID[]="@(#)PJ_fahey.c 4.1 94/02/15 GIE REL"; |
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#endif
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#define PJ_LIB__
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# include <projects.h> |
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PROJ_HEAD(fahey, "Fahey") "\n\tPcyl, Sph."; |
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#define TOL 1e-6 |
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FORWARD(s_forward); /* spheroid */
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xy.y = 1.819152 * ( xy.x = tan(0.5 * lp.phi) ); |
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xy.x = 0.819152 * lp.lam * asqrt(1 - xy.x * xy.x); |
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return (xy);
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} |
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INVERSE(s_inverse); /* spheroid */
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lp.phi = 2. * atan(xy.y /= 1.819152); |
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lp.lam = fabs(xy.y = 1. - xy.y * xy.y) < TOL ? 0. : |
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xy.x / (0.819152 * sqrt(xy.y)); |
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return (lp);
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} |
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FREEUP; if (P) pj_dalloc(P); }
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ENTRY0(fahey) P->es = 0.; P->inv = s_inverse; P->fwd = s_forward; ENDENTRY(P)
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