worked on 3D viz

scaling, moving by finger
some fixes / improvement

mapview/model/MMRoot.h

@@ -29,6 +29,14 @@ public:
 
 	}
 
+	bool isVisible() const override {
+		return true;
+	}
+
+	void setVisible(const bool) override {
+		throw "error";
+	}
+
 	/** get the underlying model */
 	Floorplan::IndoorMap* getMap() {return map;}