svn-gvsig-desktop / branches / v10 / libraries / libjni-proj4 / src / PJ_eck1.c @ 40603
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#ifndef lint
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static const char SCCSID[]="@(#)PJ_eck1.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(eck1, "Eckert I") "\n\tPCyl., Sph."; |
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#define FC .92131773192356127802 |
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#define RP .31830988618379067154 |
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FORWARD(s_forward); /* spheroid */
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xy.x = FC * lp.lam * (1. - RP * fabs(lp.phi));
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xy.y = FC * lp.phi; |
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return (xy);
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} |
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INVERSE(s_inverse); /* spheroid */
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lp.phi = xy.y / FC; |
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lp.lam = xy.x / (FC * (1. - RP * fabs(lp.phi)));
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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(eck1) |
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P->es = 0.; P->inv = s_inverse; P->fwd = s_forward;
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ENDENTRY(P) |