diff options
Diffstat (limited to 'src/PJ_goode.c')
| -rw-r--r-- | src/PJ_goode.c | 171 |
1 files changed, 122 insertions, 49 deletions
diff --git a/src/PJ_goode.c b/src/PJ_goode.c index 387557e6..48fc9ad5 100644 --- a/src/PJ_goode.c +++ b/src/PJ_goode.c @@ -1,49 +1,122 @@ -#define PROJ_PARMS__ \ - struct PJconsts *sinu; \ - struct PJconsts *moll; -#define PJ_LIB__ -#include <projects.h> -PROJ_HEAD(goode, "Goode Homolosine") "\n\tPCyl, Sph."; - C_NAMESPACE PJ -*pj_sinu(PJ *), *pj_moll(PJ *); -#define Y_COR 0.05280 -#define PHI_LIM .71093078197902358062 -FORWARD(s_forward); /* spheroid */ - if (fabs(lp.phi) <= PHI_LIM) - xy = P->sinu->fwd(lp, P->sinu); - else { - xy = P->moll->fwd(lp, P->moll); - xy.y -= lp.phi >= 0.0 ? Y_COR : -Y_COR; - } - return (xy); -} -INVERSE(s_inverse); /* spheroid */ - if (fabs(xy.y) <= PHI_LIM) - lp = P->sinu->inv(xy, P->sinu); - else { - xy.y += xy.y >= 0.0 ? Y_COR : -Y_COR; - lp = P->moll->inv(xy, P->moll); - } - return (lp); -} -FREEUP; - if (P) { - if (P->sinu) - (*(P->sinu->pfree))(P->sinu); - if (P->moll) - (*(P->moll->pfree))(P->moll); - pj_dalloc(P); - } -} -ENTRY2(goode, sinu, moll) - P->es = 0.; - if (!(P->sinu = pj_sinu(0)) || !(P->moll = pj_moll(0))) - E_ERROR_0; - P->sinu->es = 0.; - P->sinu->ctx = P->ctx; - P->moll->ctx = P->ctx; - if (!(P->sinu = pj_sinu(P->sinu)) || !(P->moll = pj_moll(P->moll))) - E_ERROR_0; - P->fwd = s_forward; - P->inv = s_inverse; -ENDENTRY(P) +#define PJ_LIB__
+#include <projects.h>
+
+PROJ_HEAD(goode, "Goode Homolosine") "\n\tPCyl, Sph.";
+
+#define Y_COR 0.05280
+#define PHI_LIM 0.71093078197902358062
+
+C_NAMESPACE PJ *pj_sinu(PJ *), *pj_moll(PJ *);
+
+struct pj_opaque {
+ PJ *sinu;
+ PJ *moll;
+};
+
+
+static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
+ XY xy = {0.0,0.0};
+ struct pj_opaque *Q = P->opaque;
+
+ if (fabs(lp.phi) <= PHI_LIM)
+ xy = Q->sinu->fwd(lp, Q->sinu);
+ else {
+ xy = Q->moll->fwd(lp, Q->moll);
+ xy.y -= lp.phi >= 0.0 ? Y_COR : -Y_COR;
+ }
+ return xy;
+}
+
+
+static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */
+ LP lp = {0.0,0.0};
+ struct pj_opaque *Q = P->opaque;
+
+ if (fabs(xy.y) <= PHI_LIM)
+ lp = Q->sinu->inv(xy, Q->sinu);
+ else {
+ xy.y += xy.y >= 0.0 ? Y_COR : -Y_COR;
+ lp = Q->moll->inv(xy, Q->moll);
+ }
+ return lp;
+}
+
+
+static void *freeup_new (PJ *P) { /* Destructor */
+ if (0==P)
+ return 0;
+ if (0==P->opaque)
+ return pj_dealloc(P);
+ if (P->opaque->sinu)
+ pj_dealloc(P->opaque->sinu);
+ if (P->opaque->moll)
+ pj_dealloc(P->opaque->moll);
+ pj_dealloc (P->opaque);
+ return pj_dealloc(P);
+
+}
+
+
+static void freeup (PJ *P) {
+ freeup_new (P);
+ return;
+}
+
+
+PJ *PROJECTION(goode) {
+ struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
+ if (0==Q)
+ return freeup_new (P);
+ P->opaque = Q;
+
+ P->es = 0.;
+ if (!(Q->sinu = pj_sinu(0)) || !(Q->moll = pj_moll(0)))
+ E_ERROR_0;
+ Q->sinu->es = 0.;
+ Q->sinu->ctx = P->ctx;
+ Q->moll->ctx = P->ctx;
+ if (!(Q->sinu = pj_sinu(Q->sinu)) || !(Q->moll = pj_moll(Q->moll)))
+ E_ERROR_0;
+
+ P->fwd = s_forward;
+ P->inv = s_inverse;
+
+ return P;
+}
+
+
+#ifdef PJ_OMIT_SELFTEST
+int pj_goode_selftest (void) {return 0;}
+#else
+
+int pj_goode_selftest (void) {
+ double tolerance_lp = 1e-10;
+ double tolerance_xy = 1e-7;
+
+ char s_args[] = {"+proj=goode +a=6400000 +lat_1=0.5 +lat_2=2"};
+
+ LP fwd_in[] = {
+ { 2, 1},
+ { 2,-1},
+ {-2, 1},
+ {-2,-1}
+ };
+
+ XY s_fwd_expect[] = {
+ { 223368.11902663155, 111701.07212763709},
{ 223368.11902663155, -111701.07212763709},
{-223368.11902663155, 111701.07212763709},
{-223368.11902663155, -111701.07212763709},
};
+
+ XY inv_in[] = {
+ { 200, 100},
+ { 200,-100},
+ {-200, 100},
+ {-200,-100}
+ };
+
+ LP s_inv_expect[] = {
+ { 0.0017904931100023887, 0.00089524655489191132},
{ 0.0017904931100023887, -0.00089524655489191132},
{-0.0017904931100023887, 0.00089524655489191132},
{-0.0017904931100023887, -0.00089524655489191132},
};
+
+ 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
|