Code cleanup/optimization

src/GUI/pathitem.cpp

@@ -51,11 +51,14 @@ void PathItem::updatePainterPath(Map *map)
 		unsigned n = qAbs(c1.lon() - c2.lon());
 
 		if (n) {
+			double prev = c1.lon();
+			GreatCircle gc(c1, c2);
+
 			if (n > 180)
 				n = n - 180;
-			double prev = c1.lon();
+
 			for (unsigned j = 1; j <= n * 60; j++) {
-				Coordinates c(GreatCircle::pointAt(c1, c2, j/(n * 60.0)));
+				Coordinates c(gc.pointAt(j/(n * 60.0)));
 				double current = c.lon();
 				if (fabs(current - prev) > 180.0)
 					_painterPath.moveTo(map->ll2xy(c));
@@ -172,9 +175,10 @@ QPointF PathItem::position(qreal x) const
 		p1 = _path.at(mid-1).distance(); p2 = _path.at(mid).distance();
 	}
 
-	if ((unsigned)qAbs(c1.lon() - c2.lon()))
-		return _map->ll2xy(GreatCircle::pointAt(c1, c2, (x - p1) / (p2 - p1)));
-	else {
+	if ((unsigned)qAbs(c1.lon() - c2.lon())) {
+		GreatCircle gc(c1, c2);
+		return _map->ll2xy(gc.pointAt((x - p1) / (p2 - p1)));
+	} else {
 		QLineF l(_map->ll2xy(c1), _map->ll2xy(c2));
 		return l.pointAt((x - p1) / (p2 - p1));
 	}

src/common/greatcircle.cpp

@@ -1,23 +1,26 @@
 #include "greatcircle.h"
 
-Coordinates GreatCircle::pointAt(const Coordinates &c1, const Coordinates &c2,
-  double f)
+GreatCircle::GreatCircle(const Coordinates &c1, const Coordinates &c2)
 {
-	double lat1 = deg2rad(c1.lat());
-	double lon1 = deg2rad(c1.lon());
-	double lat2 = deg2rad(c2.lat());
-	double lon2 = deg2rad(c2.lon());
+	_lat1 = deg2rad(c1.lat());
+	_lon1 = deg2rad(c1.lon());
+	_lat2 = deg2rad(c2.lat());
+	_lon2 = deg2rad(c2.lon());
 
-	double cosLat1 = cos(lat1);
-	double cosLat2 = cos(lat2);
-	double d = 2 * asin(sqrt(pow((sin((lat1 - lat2) / 2)), 2) + cosLat1
-	  * cosLat2 * pow(sin((lon1 - lon2) / 2), 2)));
-	double sinD = sin(d);
-	double A = sin((1.0-f)*d) / sinD;
-	double B = sin(f*d) / sinD;
-	double x = A * cosLat1 * cos(lon1) + B * cosLat2 * cos(lon2);
-	double y = A * cosLat1 * sin(lon1) + B * cosLat2 * sin(lon2);
-	double z = A * sin(lat1) + B * sin(lat2);
+	_cosLat1 = cos(_lat1);
+	_cosLat2 = cos(_lat2);
+	_d = 2 * asin(sqrt(pow((sin((_lat1 - _lat2) / 2)), 2) + _cosLat1
+	  * _cosLat2 * pow(sin((_lon1 - _lon2) / 2), 2)));
+	_sinD = sin(_d);
+}
+
+Coordinates GreatCircle::pointAt(double f) const
+{
+	double A = sin((1.0 - f) * _d) / _sinD;
+	double B = sin(f*_d) / _sinD;
+	double x = A * _cosLat1 * cos(_lon1) + B * _cosLat2 * cos(_lon2);
+	double y = A * _cosLat1 * sin(_lon1) + B * _cosLat2 * sin(_lon2);
+	double z = A * sin(_lat1) + B * sin(_lat2);
 
 	return Coordinates(rad2deg(atan2(y, x)), rad2deg(atan2(z, sqrt(x*x + y*y))));
 }

src/common/greatcircle.h

@@ -3,9 +3,18 @@
 
 #include "coordinates.h"
 
-namespace GreatCircle
+class GreatCircle
 {
-	Coordinates pointAt(const Coordinates &c1, const Coordinates &c2, double f);
-}
+public:
+	GreatCircle(const Coordinates &c1, const Coordinates &c2);
+
+	Coordinates pointAt(double f) const;
+
+private:
+	double _lat1, _lon1, _lat2, _lon2;
+	double _cosLat1, _cosLat2;
+	double _d;
+	double _sinD;
+};
 
 #endif // GREATCIRCLE_H

src/data/poi.cpp

@@ -95,38 +95,43 @@ static bool cb(size_t data, void* context)
 	return true;
 }
 
+void POI::search(const RectC &rect, QSet<int> &set) const
+{
+	qreal min[2], max[2];
+
+	min[0] = rect.topLeft().lon();
+	min[1] = rect.bottomRight().lat();
+	max[0] = rect.bottomRight().lon();
+	max[1] = rect.topLeft().lat();
+
+	_tree.Search(min, max, cb, &set);
+}
+
 QList<Waypoint> POI::points(const Path &path) const
 {
 	QList<Waypoint> ret;
 	QSet<int> set;
-	qreal min[2], max[2];
 	QSet<int>::const_iterator it;
 
 
 	for (int i = 1; i < path.count(); i++) {
 		double ds = path.at(i).distance() - path.at(i-1).distance();
 		unsigned n = (unsigned)ceil(ds / _radius);
+
+		if (n > 1) {
+			GreatCircle gc(path.at(i-1).coordinates(), path.at(i).coordinates());
 			for (unsigned j = 0; j < n; j++) {
-			RectC br(n > 1 ? GreatCircle::pointAt(path.at(i-1).coordinates(),
-			  path.at(i).coordinates(), (double)j/n)
-			  : path.at(i-1).coordinates(), _radius);
-
-			min[0] = br.topLeft().lon();
-			min[1] = br.bottomRight().lat();
-			max[0] = br.bottomRight().lon();
-			max[1] = br.topLeft().lat();
-
-			_tree.Search(min, max, cb, &set);
+				RectC br(gc.pointAt((double)j/n), _radius);
+				search(br, set);
+			}
+		} else {
+			RectC br(path.at(i-1).coordinates(), _radius);
+			search(br, set);
 		}
 	}
 
 	RectC br(path.last().coordinates(), _radius);
-	min[0] = br.topLeft().lon();
-	min[1] = br.bottomRight().lat();
-	max[0] = br.bottomRight().lon();
-	max[1] = br.topLeft().lat();
-
-	_tree.Search(min, max, cb, &set);
+	search(br, set);
 
 
 	for (it = set.constBegin(); it != set.constEnd(); ++it)

src/data/poi.h

@@ -45,6 +45,7 @@ private:
 	};
 
 	bool loadFile(const QString &path, bool dir);
+	void search(const RectC &rect, QSet<int> &set) const;
 
 	POITree _tree;
 	QVector<Waypoint> _data;