[vtkusers] Computing distance using distance widget with previously set points

[Hector Dejea]

Dear all,

I am trying to implement a distance widget with a previously set
representation (I want to give the points programatically and not by
clicking on the screen). I tried the following code and the distance
computed is correct, but the widget shows a line joining two points that
are not the ones I typed in the code.

In the attached image, the blue lines joins the correct points, the green
one corresponds to the widget.

Thanks,
Hector

    vtkSmartPointer<vtkDistanceWidget> distanceWidget =
    vtkSmartPointer<vtkDistanceWidget>::New();
    distanceWidget->SetInteractor(renderWindowInteractor);
    distanceWidget->CreateDefaultRepresentation();
    vtkDistanceRepresentation * distRep =
distanceWidget->GetDistanceRepresentation();
    distRep->SetPoint1WorldPosition(PointInit);
    distRep->SetPoint2WorldPosition(PointEnd);
    distanceWidget->SetWidgetStateToManipulate();
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