From e6de172371ea203f6393d745641d66c82b5b13e2 Mon Sep 17 00:00:00 2001 From: Even Rouault Date: Wed, 19 Dec 2018 12:25:33 +0100 Subject: cpp conversion: move source files in apps/ iso19111/ conversions/ projections/ transformations/ tests/ subdirectories --- src/projections/PJ_wag2.cpp | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/projections/PJ_wag2.cpp (limited to 'src/projections/PJ_wag2.cpp') diff --git a/src/projections/PJ_wag2.cpp b/src/projections/PJ_wag2.cpp new file mode 100644 index 00000000..1bee737a --- /dev/null +++ b/src/projections/PJ_wag2.cpp @@ -0,0 +1,38 @@ +#define PJ_LIB__ + +#include + +#include "projects.h" + +PROJ_HEAD(wag2, "Wagner II") "\n\tPCyl, Sph"; + +#define C_x 0.92483 +#define C_y 1.38725 +#define C_p1 0.88022 +#define C_p2 0.88550 + + +static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */ + XY xy = {0.0,0.0}; + lp.phi = aasin (P->ctx,C_p1 * sin (C_p2 * lp.phi)); + xy.x = C_x * lp.lam * cos (lp.phi); + xy.y = C_y * 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_y; + lp.lam = xy.x / (C_x * cos(lp.phi)); + lp.phi = aasin (P->ctx,sin(lp.phi) / C_p1) / C_p2; + return (lp); +} + + +PJ *PROJECTION(wag2) { + P->es = 0.; + P->inv = s_inverse; + P->fwd = s_forward; + return P; +} -- cgit v1.2.3