blob: 719a2ce451797057469444c53fe8e97b84466f89 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
#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->ctx, P->params, "tW").i) {
if ((P->w = fabs(pj_param(P->ctx, P->params, "dW").f)) <= 0.) E_ERROR(-27);
} else
P->w = .5;
if (pj_param(P->ctx, P->params, "tM").i) {
if ((P->m = fabs(pj_param(P->ctx, 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)
|
