restored smoothing line

src/domain/UBGraphicsScene.cpp

@@ -742,7 +742,7 @@ void UBGraphicsScene::drawLineTo(const QPointF &pEndPoint, const qreal &pWidth,
         mCurrentStroke = new UBGraphicsStroke();
 
 
-    QPolygonF newPolygon = UBGeometryUtils::lineToPolygon(QLineF(mPreviousPoint, pEndPoint), pWidth);
+    QPolygonF newPolygon = UBGeometryUtils::lineToPolygon(QLineF(mPreviousPoint, pEndPoint), mPreviousWidth, pWidth);
 
     if (!mCurrentPolygon)
     {
@@ -767,12 +767,6 @@ void UBGraphicsScene::drawLineTo(const QPointF &pEndPoint, const qreal &pWidth,
     QPolygonF oldPolygons = strokePainterPath.simplified().toFillPolygon(mCurrentPolygon->sceneTransform().inverted());
     newPolygon = oldPolygons.united(newPolygon);
 
-    /*  foreach(QPolygonF polygon, oldPolygons)
-            {
-                newPolygon = polygon.united(newPolygon);
-            }
-                */
-
     mpLastPolygon = mCurrentPolygon;
 
     mCurrentPolygon->setPolygon(newPolygon);