diff options
Diffstat (limited to 'src/PJ_eck1.c')
| -rw-r--r-- | src/PJ_eck1.c | 184 |
1 files changed, 92 insertions, 92 deletions
diff --git a/src/PJ_eck1.c b/src/PJ_eck1.c index da2c8685..f285e00b 100644 --- a/src/PJ_eck1.c +++ b/src/PJ_eck1.c @@ -1,92 +1,92 @@ -#define PJ_LIB__
-#include <projects.h>
-
-PROJ_HEAD(eck1, "Eckert I") "\n\tPCyl., Sph.";
-#define FC 0.92131773192356127802
-#define RP 0.31830988618379067154
-
-
-static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
- XY xy = {0.0,0.0};
- (void) P;
-
- xy.x = FC * lp.lam * (1. - RP * fabs(lp.phi));
- xy.y = FC * lp.phi;
-
- return xy;
-}
-
-
-static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */
- LP lp = {0.0,0.0};
- (void) P;
-
- lp.phi = xy.y / FC;
- lp.lam = xy.x / (FC * (1. - RP * fabs(lp.phi)));
-
- return (lp);
-}
-
-
-static void *freeup_new (PJ *P) { /* Destructor */
- return pj_dealloc(P);
-}
-
-
-static void freeup (PJ *P) {
- freeup_new (P);
- return;
-}
-
-
-PJ *PROJECTION(eck1) {
- P->es = 0.0;
- P->inv = s_inverse;
- P->fwd = s_forward;
-
- return P
;
-}
-
-
-#ifdef PJ_OMIT_SELFTEST
-int pj_eck1_selftest (void) {return 0;}
-#else
-
-int pj_eck1_selftest (void) {
- double tolerance_lp = 1e-10;
- double tolerance_xy = 1e-7;
-
- char s_args[] = {"+proj=eck1 +a=6400000 +lat_1=0.5 +lat_2=2"};
-
- LP fwd_in[] = {
- { 2, 1},
- { 2,-1},
- {-2, 1},
- {-2,-1}
- };
- XY s_fwd_expect[] = {
- { 204680.88820295094, 102912.17842606473},
- { 204680.88820295094, -102912.17842606473},
- {-204680.88820295094, 102912.17842606473},
- {-204680.88820295094, -102912.17842606473},
- };
-
- XY inv_in[] = {
- { 200, 100},
- { 200,-100},
- {-200, 100},
- {-200,-100}
- };
-
- LP s_inv_expect[] = {
- { 0.0019434150820034624, 0.00097170229538813102},
- { 0.0019434150820034624, -0.00097170229538813102},
- {-0.0019434150820034624, 0.00097170229538813102},
- {-0.0019434150820034624, -0.00097170229538813102},
- };
-
- return pj_generic_selftest (0, s_args, tolerance_xy, tolerance_lp, 4, 4, fwd_in, 0, s_fwd_expect, inv_in, 0, s_inv_expect);
-}
-
-
-#endif
+#define PJ_LIB__ +#include <projects.h> + +PROJ_HEAD(eck1, "Eckert I") "\n\tPCyl., Sph."; +#define FC 0.92131773192356127802 +#define RP 0.31830988618379067154 + + +static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */ + XY xy = {0.0,0.0}; + (void) P; + + xy.x = FC * lp.lam * (1. - RP * fabs(lp.phi)); + xy.y = FC * lp.phi; + + return xy; +} + + +static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */ + LP lp = {0.0,0.0}; + (void) P; + + lp.phi = xy.y / FC; + lp.lam = xy.x / (FC * (1. - RP * fabs(lp.phi))); + + return (lp); +} + + +static void *freeup_new (PJ *P) { /* Destructor */ + return pj_dealloc(P); +} + + +static void freeup (PJ *P) { + freeup_new (P); + return; +} + + +PJ *PROJECTION(eck1) { + P->es = 0.0; + P->inv = s_inverse; + P->fwd = s_forward; + + return P
; +} + + +#ifdef PJ_OMIT_SELFTEST +int pj_eck1_selftest (void) {return 0;} +#else + +int pj_eck1_selftest (void) { + double tolerance_lp = 1e-10; + double tolerance_xy = 1e-7; + + char s_args[] = {"+proj=eck1 +a=6400000 +lat_1=0.5 +lat_2=2"}; + + LP fwd_in[] = { + { 2, 1}, + { 2,-1}, + {-2, 1}, + {-2,-1} + }; + XY s_fwd_expect[] = { + { 204680.88820295094, 102912.17842606473}, + { 204680.88820295094, -102912.17842606473}, + {-204680.88820295094, 102912.17842606473}, + {-204680.88820295094, -102912.17842606473}, + }; + + XY inv_in[] = { + { 200, 100}, + { 200,-100}, + {-200, 100}, + {-200,-100} + }; + + LP s_inv_expect[] = { + { 0.0019434150820034624, 0.00097170229538813102}, + { 0.0019434150820034624, -0.00097170229538813102}, + {-0.0019434150820034624, 0.00097170229538813102}, + {-0.0019434150820034624, -0.00097170229538813102}, + }; + + return pj_generic_selftest (0, s_args, tolerance_xy, tolerance_lp, 4, 4, fwd_in, 0, s_fwd_expect, inv_in, 0, s_inv_expect); +} + + +#endif |