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#define PJ_LIB__
#include <projects.h>
struct pj_opaque {
double A;
};
PROJ_HEAD(putp3, "Putnins P3") "\n\tPCyl., Sph.";
PROJ_HEAD(putp3p, "Putnins P3'") "\n\tPCyl., Sph.";
#define C 0.79788456
#define RPISQ 0.1013211836
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
xy.x = C * lp.lam * (1. - P->opaque->A * lp.phi * lp.phi);
xy.y = C * lp.phi;
return xy;
}
static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */
LP lp = {0.0,0.0};
lp.phi = xy.y / C;
lp.lam = xy.x / (C * (1. - P->opaque->A * lp.phi * lp.phi));
return lp;
}
static void *freeup_new (PJ *P) { /* Destructor */
if (0==P)
return 0;
if (0==P->opaque)
return pj_dealloc (P);
pj_dealloc (P->opaque);
return pj_dealloc(P);
}
static void freeup (PJ *P) {
freeup_new (P);
return;
}
PJ *PROJECTION(putp3) {
struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
if (0==Q)
return freeup_new (P);
P->opaque = Q;
Q->A = 4. * RPISQ;
P->es = 0.;
P->inv = s_inverse;
P->fwd = s_forward;
return P;
}
PJ *PROJECTION(putp3p) {
struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
if (0==Q)
return freeup_new (P);
P->opaque = Q;
Q->A = 2. * RPISQ;
P->es = 0.;
P->inv = s_inverse;
P->fwd = s_forward;
return P;
}
#ifndef PJ_SELFTEST
int pj_putp3_selftest (void) {return 0;}
#else
int pj_putp3_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=putp3 +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{ 178227.115507793525, 89124.5607860879827},
{ 178227.115507793525, -89124.5607860879827},
{-178227.115507793525, 89124.5607860879827},
{-178227.115507793525, -89124.5607860879827},
};
XY inv_in[] = {
{ 200, 100},
{ 200,-100},
{-200, 100},
{-200,-100}
};
LP s_inv_expect[] = {
{ 0.00224405032986489889, 0.00112202516475805899},
{ 0.00224405032986489889, -0.00112202516475805899},
{-0.00224405032986489889, 0.00112202516475805899},
{-0.00224405032986489889, -0.00112202516475805899},
};
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
#ifndef PJ_SELFTEST
int pj_putp3p_selftest (void) {return 0;}
#else
int pj_putp3p_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=putp3p +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{ 178238.118539984745, 89124.5607860879827},
{ 178238.118539984745, -89124.5607860879827},
{-178238.118539984745, 89124.5607860879827},
{-178238.118539984745, -89124.5607860879827},
};
XY inv_in[] = {
{ 200, 100},
{ 200,-100},
{-200, 100},
{-200,-100}
};
LP s_inv_expect[] = {
{ 0.00224405032969050844, 0.00112202516475805899},
{ 0.00224405032969050844, -0.00112202516475805899},
{-0.00224405032969050844, 0.00112202516475805899},
{-0.00224405032969050844, -0.00112202516475805899},
};
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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