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#define PJ_LIB__
#include <errno.h>
#include <math.h>
#include "proj.h"
#include "projects.h"
PROJ_HEAD(urmfps, "Urmaev Flat-Polar Sinusoidal") "\n\tPCyl, Sph\n\tn=";
PROJ_HEAD(wag1, "Wagner I (Kavraisky VI)") "\n\tPCyl, Sph";
namespace { // anonymous namespace
struct pj_opaque {
double n, C_y;
};
} // anonymous namespace
#define C_x 0.8773826753
#define Cy 1.139753528477
static PJ_XY s_forward (PJ_LP lp, PJ *P) { /* Spheroidal, forward */
PJ_XY xy = {0.0, 0.0};
lp.phi = aasin (P->ctx,static_cast<struct pj_opaque*>(P->opaque)->n * sin (lp.phi));
xy.x = C_x * lp.lam * cos (lp.phi);
xy.y = static_cast<struct pj_opaque*>(P->opaque)->C_y * lp.phi;
return xy;
}
static PJ_LP s_inverse (PJ_XY xy, PJ *P) { /* Spheroidal, inverse */
PJ_LP lp = {0.0, 0.0};
xy.y /= static_cast<struct pj_opaque*>(P->opaque)->C_y;
lp.phi = aasin(P->ctx, sin (xy.y) / static_cast<struct pj_opaque*>(P->opaque)->n);
lp.lam = xy.x / (C_x * cos (xy.y));
return lp;
}
static PJ *setup(PJ *P) {
static_cast<struct pj_opaque*>(P->opaque)->C_y = Cy / static_cast<struct pj_opaque*>(P->opaque)->n;
P->es = 0.;
P->inv = s_inverse;
P->fwd = s_forward;
return P;
}
PJ *PROJECTION(urmfps) {
struct pj_opaque *Q = static_cast<struct pj_opaque*>(pj_calloc (1, sizeof (struct pj_opaque)));
if (nullptr==Q)
return pj_default_destructor(P, ENOMEM);
P->opaque = Q;
if (pj_param(P->ctx, P->params, "tn").i) {
static_cast<struct pj_opaque*>(P->opaque)->n = pj_param(P->ctx, P->params, "dn").f;
if (static_cast<struct pj_opaque*>(P->opaque)->n <= 0. || static_cast<struct pj_opaque*>(P->opaque)->n > 1.)
return pj_default_destructor(P, PJD_ERR_N_OUT_OF_RANGE);
} else {
return pj_default_destructor(P, PJD_ERR_N_OUT_OF_RANGE);
}
return setup(P);
}
PJ *PROJECTION(wag1) {
struct pj_opaque *Q = static_cast<struct pj_opaque*>(pj_calloc (1, sizeof (struct pj_opaque)));
if (nullptr==Q)
return pj_default_destructor(P, ENOMEM);
P->opaque = Q;
static_cast<struct pj_opaque*>(P->opaque)->n = 0.8660254037844386467637231707;
return setup(P);
}
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