- SketcherPrs_PositionMgr* aMgr = SketcherPrs_PositionMgr::get();
- gp_Pnt aP1 = aMgr->getPosition(aObj1, this, theStep, aPnt);
- myPntArray = new Graphic3d_ArrayOfPoints(1, withColor);
- myPntArray->AddVertex(aP1);
+ if (aPnt.get()) {
+ SketcherPrs_PositionMgr* aMgr = SketcherPrs_PositionMgr::get();
+ gp_Pnt aP1 = aMgr->getPosition(aObj1, this, theStep, aPnt);
+ myPntArray = new Graphic3d_ArrayOfPoints(1, withColor);
+ myPntArray->AddVertex(aP1);
+ } else {
+ SketcherPrs_PositionMgr* aMgr = SketcherPrs_PositionMgr::get();
+ gp_Pnt aP1 = aMgr->getPosition(aObj1, this, theStep);
+ gp_Pnt aP2 = aMgr->getPosition(aObj2, this, theStep);
+ myPntArray = new Graphic3d_ArrayOfPoints(2, withColor);
+ myPntArray->AddVertex(aP1);
+ myPntArray->AddVertex(aP2);
+ }