svn-gvsig-desktop / tags / gvsig_redes-1_0_0-1235 / libraries / libjni-proj4 / src / PJ_wag3.c @ 44116
History | View | Annotate | Download (685 Bytes)
| 1 |
#ifndef lint
|
|---|---|
| 2 |
static const char SCCSID[]="@(#)PJ_wag3.c 4.1 94/02/15 GIE REL"; |
| 3 |
#endif
|
| 4 |
#define PROJ_PARMS__ \
|
| 5 |
double C_x;
|
| 6 |
#define PJ_LIB__
|
| 7 |
# include <projects.h> |
| 8 |
PROJ_HEAD(wag3, "Wagner III") "\n\tPCyl., Sph."; |
| 9 |
#define TWOTHIRD 0.6666666666666666666667 |
| 10 |
FORWARD(s_forward); /* spheroid */
|
| 11 |
xy.x = P->C_x * lp.lam * cos(TWOTHIRD * lp.phi); |
| 12 |
xy.y = lp.phi; |
| 13 |
return (xy);
|
| 14 |
} |
| 15 |
INVERSE(s_inverse); /* spheroid */
|
| 16 |
lp.phi = xy.y; |
| 17 |
lp.lam = xy.x / (P->C_x * cos(TWOTHIRD * lp.phi)); |
| 18 |
return (lp);
|
| 19 |
} |
| 20 |
FREEUP; if (P) pj_dalloc(P); }
|
| 21 |
ENTRY0(wag3) |
| 22 |
double ts;
|
| 23 |
|
| 24 |
ts = pj_param(P->params, "rlat_ts").f;
|
| 25 |
P->C_x = cos(ts) / cos(2.*ts/3.); |
| 26 |
P->es = 0.; P->inv = s_inverse; P->fwd = s_forward;
|
| 27 |
ENDENTRY(P) |