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| author | Frank Warmerdam <warmerdam@pobox.com> | 1999-03-18 16:34:52 +0000 |
|---|---|---|
| committer | Frank Warmerdam <warmerdam@pobox.com> | 1999-03-18 16:34:52 +0000 |
| commit | 565a4bd035b9d4a83955808efef20f1d8dfa24cf (patch) | |
| tree | 75785fc897708023f1ccdaf40079afcbaaf0fd3a /src/PJ_hammer.c | |
| download | PROJ-565a4bd035b9d4a83955808efef20f1d8dfa24cf.tar.gz PROJ-565a4bd035b9d4a83955808efef20f1d8dfa24cf.zip | |
New
git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@776 4e78687f-474d-0410-85f9-8d5e500ac6b2
Diffstat (limited to 'src/PJ_hammer.c')
| -rw-r--r-- | src/PJ_hammer.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/PJ_hammer.c b/src/PJ_hammer.c new file mode 100644 index 00000000..813d6e5f --- /dev/null +++ b/src/PJ_hammer.c @@ -0,0 +1,32 @@ +#ifndef lint +static const char SCCSID[]="@(#)PJ_hammer.c 4.1 94/02/15 GIE REL"; +#endif +#define PROJ_PARMS__ \ + double w; \ + double m, rm; +#define PJ_LIB__ +# include <projects.h> +PROJ_HEAD(hammer, "Hammer & Eckert-Greifendorff") + "\n\tMisc Sph, no inv.\n\tW= M="; +FORWARD(s_forward); /* spheroid */ + double cosphi, d; + + d = sqrt(2./(1. + (cosphi = cos(lp.phi)) * cos(lp.lam *= P->w))); + xy.x = P->m * d * cosphi * sin(lp.lam); + xy.y = P->rm * d * sin(lp.phi); + return (xy); +} +FREEUP; if (P) pj_dalloc(P); } +ENTRY0(hammer) + if (pj_param(P->params, "tW").i) { + if ((P->w = fabs(pj_param(P->params, "dW").f)) <= 0.) E_ERROR(-27); + } else + P->w = .5; + if (pj_param(P->params, "tM").i) { + if ((P->m = fabs(pj_param(P->params, "dM").f)) <= 0.) E_ERROR(-27); + } else + P->m = 1.; + P->rm = 1. / P->m; + P->m /= P->w; + P->es = 0.; P->fwd = s_forward; +ENDENTRY(P) |