From 656d86a4efde50d6bda019cbef924a71a1253fe8 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Sat, 4 Nov 2017 03:58:16 +0100
Subject: [PATCH] Ref T180, isNull for CCoordinateGeodetic / situation

---
 src/blackmisc/aviation/aircraftsituation.h | 3 +++
 src/blackmisc/geo/coordinategeodetic.h     | 8 +++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/blackmisc/aviation/aircraftsituation.h b/src/blackmisc/aviation/aircraftsituation.h
index 9fd10acda..1af33d3eb 100644
--- a/src/blackmisc/aviation/aircraftsituation.h
+++ b/src/blackmisc/aviation/aircraftsituation.h
@@ -112,6 +112,9 @@ namespace BlackMisc
             //! Get position
             const Geo::CCoordinateGeodetic &getPosition() const { return m_position; }
 
+            //! Position null?
+            bool isPositionNull() const { return m_position.isNull(); }
+
             //! Set position
             void setPosition(const Geo::CCoordinateGeodetic &position) { m_position = position; }
 
diff --git a/src/blackmisc/geo/coordinategeodetic.h b/src/blackmisc/geo/coordinategeodetic.h
index fe81f0e6c..a8872e74e 100644
--- a/src/blackmisc/geo/coordinategeodetic.h
+++ b/src/blackmisc/geo/coordinategeodetic.h
@@ -93,7 +93,7 @@ namespace BlackMisc
             QString geodeticHeightAsString() const { return this->geodeticHeight().toQString(true); }
 
             //! Geodetic height null?
-            bool isGeodeticHeightNull() { return this->geodeticHeight().isNull(); }
+            bool isGeodeticHeightNull() const { return this->geodeticHeight().isNull(); }
 
             //! Great circle distance
             PhysicalQuantities::CLength calculateGreatCircleDistance(const ICoordinateGeodetic &otherCoordinate) const;
@@ -249,6 +249,12 @@ namespace BlackMisc
             //! Set normal vector
             void setNormalVector(double x, double y, double z) { m_x = x; m_y = y; m_z = z; }
 
+            //! Set to null
+            void setNull() { this->setNormalVector(0, 0, 0); }
+
+            //! Is null?
+            bool isNull() const { return m_x == 0 && m_y == 0 && m_z == 0; }
+
             //! Coordinate by WGS84 position data
             static CCoordinateGeodetic fromWgs84(const QString &latitudeWgs84, const QString &longitudeWgs84, const Aviation::CAltitude &geodeticHeight = {});