+ void computeTransformationPoints( const bool theObligatoryInit = false );
+
+ QGraphicsItemGroup* createPointItem( const QString& theCaption,
+ const QColor& theColor );
+
+ /**
+ * Create presentations for transformation points A, B and C or update the presentation
+ * parameters if it is already created
+ */
+ void initTrsfPoints( const int thePointType );