--- a/src/model.h Sun Jan 29 15:28:48 2017 +0200 +++ b/src/model.h Sun Jan 29 15:39:35 2017 +0200 @@ -26,6 +26,7 @@ int triangleCount() const; QVector<LDObject*>::iterator begin(); QVector<LDObject*>::iterator end(); + bool isEmpty() const; template<typename T, typename... Args> T* emplace(Args&& ...args)