cpp conversion: move source files in apps/ iso19111/ conversions/ projections/ transformations/ tests/ subdirectories

1 files changed, 320 insertions, 0 deletions

diff --git a/src/projections/PJ_stere.cpp b/src/projections/PJ_stere.cpp
new file mode 100644
index 00000000..1502b2a6
--- /dev/null
+++ b/src/projections/PJ_stere.cpp
@@ -0,0 +1,320 @@
+#define PJ_LIB__
+#include <errno.h>
+#include "proj.h"
+#include "projects.h"
+#include "proj_math.h"
+
+PROJ_HEAD(stere, "Stereographic") "\n\tAzi, Sph&Ell\n\tlat_ts=";
+PROJ_HEAD(ups, "Universal Polar Stereographic") "\n\tAzi, Sph&Ell\n\tsouth";
+
+
+namespace { // anonymous namespace
+enum Mode {
+    S_POLE = 0,
+    N_POLE = 1,
+    OBLIQ  = 2,
+    EQUIT  = 3
+};
+} // anonymous namespace
+
+namespace { // anonymous namespace
+struct pj_opaque {
+    double phits;
+    double sinX1;
+    double cosX1;
+    double akm1;
+    enum Mode mode;
+};
+} // anonymous namespace
+
+#define sinph0  static_cast<struct pj_opaque*>(P->opaque)->sinX1
+#define cosph0  static_cast<struct pj_opaque*>(P->opaque)->cosX1
+#define EPS10   1.e-10
+#define TOL 1.e-8
+#define NITER   8
+#define CONV    1.e-10
+
+static double ssfn_ (double phit, double sinphi, double eccen) {
+    sinphi *= eccen;
+    return (tan (.5 * (M_HALFPI + phit)) *
+       pow ((1. - sinphi) / (1. + sinphi), .5 * eccen));
+}
+
+
+static XY e_forward (LP lp, PJ *P) {          /* Ellipsoidal, forward */
+    XY xy = {0.0,0.0};
+    struct pj_opaque *Q = static_cast<struct pj_opaque*>(P->opaque);
+    double coslam, sinlam, sinX = 0.0, cosX = 0.0, X, A = 0.0, sinphi;
+
+    coslam = cos (lp.lam);
+    sinlam = sin (lp.lam);
+    sinphi = sin (lp.phi);
+    if (Q->mode == OBLIQ || Q->mode == EQUIT) {
+        sinX = sin (X = 2. * atan(ssfn_(lp.phi, sinphi, P->e)) - M_HALFPI);
+        cosX = cos (X);
+    }
+
+    switch (Q->mode) {
+    case OBLIQ:
+        A = Q->akm1 / (Q->cosX1 * (1. + Q->sinX1 * sinX +
+           Q->cosX1 * cosX * coslam));
+        xy.y = A * (Q->cosX1 * sinX - Q->sinX1 * cosX * coslam);
+        goto xmul; /* but why not just  xy.x = A * cosX; break;  ? */
+
+    case EQUIT:
+        /* avoid zero division */
+        if (1. + cosX * coslam == 0.0) {
+            xy.y = HUGE_VAL;
+        } else {
+            A = Q->akm1 / (1. + cosX * coslam);
+            xy.y = A * sinX;
+        }
+xmul:
+        xy.x = A * cosX;
+        break;
+
+    case S_POLE:
+        lp.phi = -lp.phi;
+        coslam = - coslam;
+        sinphi = -sinphi;
+        /*-fallthrough*/
+    case N_POLE:
+        xy.x = Q->akm1 * pj_tsfn (lp.phi, sinphi, P->e);
+        xy.y = - xy.x * coslam;
+        break;
+    }
+
+    xy.x = xy.x * sinlam;
+    return xy;
+}
+
+
+static XY s_forward (LP lp, PJ *P) {           /* Spheroidal, forward */
+    XY xy = {0.0,0.0};
+    struct pj_opaque *Q = static_cast<struct pj_opaque*>(P->opaque);
+    double  sinphi, cosphi, coslam, sinlam;
+
+    sinphi = sin(lp.phi);
+    cosphi = cos(lp.phi);
+    coslam = cos(lp.lam);
+    sinlam = sin(lp.lam);
+
+    switch (Q->mode) {
+    case EQUIT:
+        xy.y = 1. + cosphi * coslam;
+        goto oblcon;
+    case OBLIQ:
+        xy.y = 1. + sinph0 * sinphi + cosph0 * cosphi * coslam;
+oblcon:
+        if (xy.y <= EPS10) {
+            proj_errno_set(P, PJD_ERR_TOLERANCE_CONDITION);
+            return xy;
+        }
+        xy.x = (xy.y = Q->akm1 / xy.y) * cosphi * sinlam;
+        xy.y *= (Q->mode == EQUIT) ? sinphi :
+           cosph0 * sinphi - sinph0 * cosphi * coslam;
+        break;
+    case N_POLE:
+        coslam = - coslam;
+        lp.phi = - lp.phi;
+        /*-fallthrough*/
+    case S_POLE:
+        if (fabs (lp.phi - M_HALFPI) < TOL) {
+            proj_errno_set(P, PJD_ERR_TOLERANCE_CONDITION);
+            return xy;
+        }
+        xy.x = sinlam * ( xy.y = Q->akm1 * tan (M_FORTPI + .5 * lp.phi) );
+        xy.y *= coslam;
+        break;
+    }
+    return xy;
+}
+
+
+static LP e_inverse (XY xy, PJ *P) {          /* Ellipsoidal, inverse */
+    LP lp = {0.0,0.0};
+    struct pj_opaque *Q = static_cast<struct pj_opaque*>(P->opaque);
+    double cosphi, sinphi, tp=0.0, phi_l=0.0, rho, halfe=0.0, halfpi=0.0;
+    int i;
+
+    rho = hypot (xy.x, xy.y);
+
+    switch (Q->mode) {
+    case OBLIQ:
+    case EQUIT:
+        cosphi = cos ( tp = 2. * atan2 (rho * Q->cosX1 , Q->akm1) );
+        sinphi = sin (tp);
+                if ( rho == 0.0 )
+            phi_l = asin (cosphi * Q->sinX1);
+                else
+            phi_l = asin (cosphi * Q->sinX1 + (xy.y * sinphi * Q->cosX1 / rho));
+
+        tp = tan (.5 * (M_HALFPI + phi_l));
+        xy.x *= sinphi;
+        xy.y = rho * Q->cosX1 * cosphi - xy.y * Q->sinX1* sinphi;
+        halfpi = M_HALFPI;
+        halfe = .5 * P->e;
+        break;
+    case N_POLE:
+        xy.y = -xy.y;
+        /*-fallthrough*/
+    case S_POLE:
+        phi_l = M_HALFPI - 2. * atan (tp = - rho / Q->akm1);
+        halfpi = -M_HALFPI;
+        halfe = -.5 * P->e;
+        break;
+    }
+
+    for (i = NITER;  i--;  phi_l = lp.phi) {
+        sinphi = P->e * sin(phi_l);
+        lp.phi = 2. * atan (tp * pow ((1.+sinphi)/(1.-sinphi), halfe)) - halfpi;
+        if (fabs (phi_l - lp.phi) < CONV) {
+            if (Q->mode == S_POLE)
+                lp.phi = -lp.phi;
+            lp.lam = (xy.x == 0. && xy.y == 0.) ? 0. : atan2 (xy.x, xy.y);
+            return lp;
+        }
+    }
+
+    proj_errno_set(P, PJD_ERR_TOLERANCE_CONDITION);
+    return lp;
+}
+
+
+static LP s_inverse (XY xy, PJ *P) {           /* Spheroidal, inverse */
+    LP lp = {0.0,0.0};
+    struct pj_opaque *Q = static_cast<struct pj_opaque*>(P->opaque);
+    double  c, rh, sinc, cosc;
+
+    sinc = sin (c = 2. * atan ((rh = hypot (xy.x, xy.y)) / Q->akm1));
+    cosc = cos (c);
+    lp.lam = 0.;
+
+    switch (Q->mode) {
+    case EQUIT:
+        if (fabs (rh) <= EPS10)
+            lp.phi = 0.;
+        else
+            lp.phi = asin (xy.y * sinc / rh);
+        if (cosc != 0. || xy.x != 0.)
+            lp.lam = atan2 (xy.x * sinc, cosc * rh);
+        break;
+    case OBLIQ:
+        if (fabs (rh) <= EPS10)
+            lp.phi = P->phi0;
+        else
+            lp.phi = asin (cosc * sinph0 + xy.y * sinc * cosph0 / rh);
+        if ((c = cosc - sinph0 * sin (lp.phi)) != 0. || xy.x != 0.)
+            lp.lam = atan2 (xy.x * sinc * cosph0, c * rh);
+        break;
+    case N_POLE:
+        xy.y = -xy.y;
+        /*-fallthrough*/
+    case S_POLE:
+        if (fabs (rh) <= EPS10)
+            lp.phi = P->phi0;
+        else
+            lp.phi = asin (Q->mode == S_POLE ? - cosc : cosc);
+        lp.lam = (xy.x == 0. && xy.y == 0.) ? 0. : atan2 (xy.x, xy.y);
+        break;
+    }
+    return lp;
+}
+
+
+static PJ *setup(PJ *P) {                   /* general initialization */
+    double t;
+    struct pj_opaque *Q = static_cast<struct pj_opaque*>(P->opaque);
+
+    if (fabs ((t = fabs (P->phi0)) - M_HALFPI) < EPS10)
+        Q->mode = P->phi0 < 0. ? S_POLE : N_POLE;
+    else
+        Q->mode = t > EPS10 ? OBLIQ : EQUIT;
+    Q->phits = fabs (Q->phits);
+
+    if (P->es != 0.0) {
+        double X;
+
+        switch (Q->mode) {
+        case N_POLE:
+        case S_POLE:
+            if (fabs (Q->phits - M_HALFPI) < EPS10)
+                Q->akm1 = 2. * P->k0 /
+                   sqrt (pow (1+P->e,1+P->e) * pow (1-P->e,1-P->e));
+            else {
+                Q->akm1 = cos (Q->phits) /
+                   pj_tsfn (Q->phits, t = sin (Q->phits), P->e);
+                t *= P->e;
+                Q->akm1 /= sqrt(1. - t * t);
+            }
+            break;
+        case EQUIT:
+        case OBLIQ:
+            t = sin (P->phi0);
+            X = 2. * atan (ssfn_(P->phi0, t, P->e)) - M_HALFPI;
+            t *= P->e;
+            Q->akm1 = 2. * P->k0 * cos (P->phi0) / sqrt(1. - t * t);
+            Q->sinX1 = sin (X);
+            Q->cosX1 = cos (X);
+            break;
+        }
+        P->inv = e_inverse;
+        P->fwd = e_forward;
+    } else {
+        switch (Q->mode) {
+        case OBLIQ:
+            sinph0 = sin (P->phi0);
+            cosph0 = cos (P->phi0);
+            /*-fallthrough*/
+        case EQUIT:
+            Q->akm1 = 2. * P->k0;
+            break;
+        case S_POLE:
+        case N_POLE:
+            Q->akm1 = fabs (Q->phits - M_HALFPI) >= EPS10 ?
+               cos (Q->phits) / tan (M_FORTPI - .5 * Q->phits) :
+               2. * P->k0 ;
+            break;
+        }
+
+        P->inv = s_inverse;
+        P->fwd = s_forward;
+    }
+    return P;
+}
+
+
+PJ *PROJECTION(stere) {
+    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;
+
+    Q->phits = pj_param (P->ctx, P->params, "tlat_ts").i ?
+               pj_param (P->ctx, P->params, "rlat_ts").f : M_HALFPI;
+
+    return setup(P);
+}
+
+
+PJ *PROJECTION(ups) {
+    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;
+
+    /* International Ellipsoid */
+    P->phi0 = pj_param(P->ctx, P->params, "bsouth").i ? - M_HALFPI: M_HALFPI;
+    if (P->es == 0.0) {
+        proj_errno_set(P, PJD_ERR_ELLIPSOID_USE_REQUIRED);
+        return pj_default_destructor (P, ENOMEM);
+    }
+    P->k0 = .994;
+    P->x0 = 2000000.;
+    P->y0 = 2000000.;
+    Q->phits = M_HALFPI;
+    P->lam0 = 0.;
+
+    return setup(P);
+}
+