svn-gvsig-desktop / tags / v1_9_Build_1222 / libraries / libjni-proj4 / src / PJ_gall.c @ 41849
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#ifndef lint
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static const char SCCSID[]="@(#)PJ_gall.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(gall, "Gall (Gall Stereographic)") "\n\tCyl, Sph"; |
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#define YF 1.70710678118654752440 |
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#define XF 0.70710678118654752440 |
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#define RYF 0.58578643762690495119 |
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#define RXF 1.41421356237309504880 |
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FORWARD(s_forward); /* spheroid */
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xy.x = XF * lp.lam; |
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xy.y = YF * tan(.5 * 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.lam = RXF * xy.x; |
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lp.phi = 2. * atan(xy.y * RYF);
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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(gall) P->es = 0.; P->inv = s_inverse; P->fwd = s_forward; ENDENTRY(P)
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