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#define PJ_LIB__
#include "projects.h"
PROJ_HEAD(larr, "Larrivee") "\n\tMisc Sph, no inv.";
#define SIXTH .16666666666666666
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
(void) P;
xy.x = 0.5 * lp.lam * (1. + sqrt(cos(lp.phi)));
xy.y = lp.phi / (cos(0.5 * lp.phi) * cos(SIXTH * lp.lam));
return xy;
}
PJ *PROJECTION(larr) {
P->es = 0;
P->fwd = s_forward;
return P;
}
#ifndef PJ_SELFTEST
int pj_larr_selftest (void) {return 0;}
#else
int pj_larr_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=larr +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{223393.637624200899, 111707.215961255497},
{223393.637624200899, -111707.215961255497},
{-223393.637624200899, 111707.215961255497},
{-223393.637624200899, -111707.215961255497},
};
return pj_generic_selftest (0, s_args, tolerance_xy, tolerance_lp, 4, 4, fwd_in, 0, s_fwd_expect, 0, 0, 0);
}
#endif
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