version 2.13.0

add Map library (MapView with OSM maps and items) and mapviewer util

libs/map/osm_math_p.h

@@ -0,0 +1,66 @@
+/*
+    QAD - Qt ADvanced
+
+	Ivan Pelipenko peri4ko@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef osm_math_p_h
+#define osm_math_p_h
+
+#include <QPointF>
+#include <math.h>
+
+// lon -> -180..+180
+// lat -> -85.0511..+85.0511
+
+namespace OSM {
+
+
+inline double lng2x(double lon) {
+	return (lon + 180.0) / 360.0;
+}
+
+
+inline double lat2y(double lat) {
+	double latrad = lat * M_PI / 180.0;
+	return (1.0 - asinh(tan(latrad)) / M_PI) / 2.0;
+}
+
+
+inline double x2lng(double x) {
+	return x * 360.0 - 180;
+}
+
+
+inline double y2lat(double y) {
+	double n = M_PI - 2.0 * M_PI * y;
+	return 180.0 / M_PI * atan(0.5 * (exp(n) - exp(-n)));
+}
+
+
+inline QPointF xy2geo(QPointF p) {
+	return QPointF(y2lat(p.y()), x2lng(p.x()));
+}
+
+
+inline QPointF geo2xy(QPointF p) {
+	return QPointF(lng2x(p.y()), lat2y(p.x()));
+}
+
+
+} // namespace OSM
+
+#endif