[Survey transects generation] introduce decompose function (dummy for now)

src/MissionManager/SurveyComplexItem.cc

@@ -1117,7 +1117,7 @@ void SurveyComplexItem::_rebuildTransectsPhase1Worker(bool refly)
 
     // Create list of separate polygons
     QList<QPolygonF> polygons;
-    polygons << polygon;
+    _PolygonDecomposeConvex(polygon, polygons);
 
     // iterate over polygons
     for (const auto& p : polygons) {
@@ -1125,6 +1125,11 @@ void SurveyComplexItem::_rebuildTransectsPhase1Worker(bool refly)
     }
 }
 
+void SurveyComplexItem::_PolygonDecomposeConvex(const QPolygonF& polygon, QList<QPolygonF>& polygons)
+{
+    polygons << polygon;
+}
+
 void SurveyComplexItem::_rebuildTranscetsFromPolygon(bool refly, const QPolygonF& polygon, const QGeoCoordinate& tangentOrigin)
 {
     // Generate transects

src/MissionManager/SurveyComplexItem.h

@@ -113,6 +113,7 @@ private:
     void _rebuildTransectsPhase1Worker(bool refly);
     /// Adds to the _transects array from one polygon
     void _rebuildTranscetsFromPolygon(bool refly, const QPolygonF& polygon, const QGeoCoordinate& tangentOrigin);
+    void _PolygonDecomposeConvex(const QPolygonF& polygon, QList<QPolygonF>& polygons);
 
     QMap<QString, FactMetaData*> _metaDataMap;