Fix Map.toCoordinate always clamping y values to 0

This patch allows to call toCoordinate also on negative y values, given
that the y value is still below the horizon. If not, the y value
will be clamped to the "minimum unprojectable y value", a value that
is clamped to 0.

Task-number: QTBUG-61813
Change-Id: I177d3b459b6eaf827daf860b7d4011511a7e76ee
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
Reviewed-by: Paolo Angelelli <paolo.angelelli@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/location/maps/qgeoprojection_p.h b/src/location/maps/qgeoprojection_p.h
index 3a0dec1d..7d306eea 100644
--- a/src/location/maps/qgeoprojection_p.h
+++ b/src/location/maps/qgeoprojection_p.h
@@ -128,7 +128,7 @@ public:
     QList<QDoubleVector2D> visibleRegion() const Q_DECL_OVERRIDE;
 
     inline QDoubleVector2D viewportToWrappedMapProjection(const QDoubleVector2D &itemPosition) const;
-
+    inline QDoubleVector2D viewportToWrappedMapProjection(const QDoubleVector2D &itemPosition, double &s) const;
 private:
     void setupCamera();
     void updateVisibleRegion();
@@ -151,6 +151,7 @@ public:
         Plane(const QDoubleVector3D &planePoint, const QDoubleVector3D &planeNormal);
 
         QDoubleVector3D lineIntersection(const QDoubleVector3D &linePoint, const QDoubleVector3D &lineDirection) const;
+        inline QDoubleVector3D lineIntersection(const QDoubleVector3D &linePoint, const QDoubleVector3D &lineDirection, double &s) const;
         Line2D planeXYIntersection() const;
         bool isValid() const;