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

1 files changed, 77 insertions, 0 deletions

diff --git a/src/projections/PJ_loxim.cpp b/src/projections/PJ_loxim.cpp
new file mode 100644
index 00000000..f68e844a
--- /dev/null
+++ b/src/projections/PJ_loxim.cpp
@@ -0,0 +1,77 @@
+#define PJ_LIB__
+
+#include <errno.h>
+#include <math.h>
+
+#include "proj.h"
+#include "projects.h"
+
+PROJ_HEAD(loxim, "Loximuthal") "\n\tPCyl Sph";
+
+#define EPS 1e-8
+
+namespace { // anonymous namespace
+struct pj_opaque {
+    double phi1;
+    double cosphi1;
+    double tanphi1;
+};
+} // anonymous namespace
+
+
+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);
+
+    xy.y = lp.phi - Q->phi1;
+    if (fabs(xy.y) < EPS)
+        xy.x = lp.lam * Q->cosphi1;
+    else {
+        xy.x = M_FORTPI + 0.5 * lp.phi;
+        if (fabs(xy.x) < EPS || fabs(fabs(xy.x) - M_HALFPI) < EPS)
+            xy.x = 0.;
+        else
+            xy.x = lp.lam * xy.y / log( tan(xy.x) / Q->tanphi1 );
+    }
+    return xy;
+}
+
+
+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);
+
+    lp.phi = xy.y + Q->phi1;
+    if (fabs(xy.y) < EPS) {
+        lp.lam = xy.x / Q->cosphi1;
+    } else {
+        lp.lam = M_FORTPI + 0.5 * lp.phi;
+        if (fabs(lp.lam) < EPS || fabs(fabs(lp.lam) - M_HALFPI) < EPS)
+            lp.lam = 0.;
+        else
+            lp.lam = xy.x * log( tan(lp.lam) / Q->tanphi1 ) / xy.y ;
+    }
+    return lp;
+}
+
+
+PJ *PROJECTION(loxim) {
+    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->phi1 = pj_param(P->ctx, P->params, "rlat_1").f;
+    Q->cosphi1 = cos(Q->phi1);
+    if (Q->cosphi1 < EPS)
+        return pj_default_destructor(P, PJD_ERR_LAT_LARGER_THAN_90);
+
+
+    Q->tanphi1 = tan(M_FORTPI + 0.5 * Q->phi1);
+
+    P->inv = s_inverse;
+    P->fwd = s_forward;
+    P->es = 0.;
+
+   return P;
+}