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#define PJ_LIB__
#include <projects.h>
PROJ_HEAD(cc, "Central Cylindrical") "\n\tCyl, Sph";
#define EPS10 1.e-10
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
if (fabs (fabs(lp.phi) - M_HALFPI) <= EPS10) F_ERROR;
xy.x = lp.lam;
xy.y = tan(lp.phi);
return xy;
}
static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */
LP lp = {0.0,0.0};
(void) P;
lp.phi = atan(xy.y);
lp.lam = xy.x;
return lp;
}
static void *freeup_new (PJ *P) { /* Destructor */
return pj_dealloc(P);
}
static void freeup (PJ *P) {
freeup_new (P);
return;
}
PJ *PROJECTION(cc) {
P->es = 0.;
P->inv = s_inverse;
P->fwd = s_forward;
return P;
}
#ifndef PJ_SELFTEST
int pj_cc_selftest (void) {return 0;}
#else
int pj_cc_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=cc +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{223402.14425527418, 111712.41554059254},
{223402.14425527418, -111712.41554059254},
{-223402.14425527418, 111712.41554059254},
{-223402.14425527418, -111712.41554059254},
};
XY inv_in[] = {
{ 200, 100},
{ 200,-100},
{-200, 100},
{-200,-100}
};
LP s_inv_expect[] = {
{0.0017904931097838226, 0.00089524655481905597},
{0.0017904931097838226, -0.00089524655481905597},
{-0.0017904931097838226, 0.00089524655481905597},
{-0.0017904931097838226, -0.00089524655481905597},
};
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
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