[vtkusers] FindCell method of vtkCellLocator

[shinpei]

Sry... I thought it would be clear what I mean.

The geometry contains two triangles:
Points are:
(0 0 0)
(0 10 0)
(10 0 0)
(10 10 0)

with connection: 
(0 1 2)
(1 2 3)

     for (vtkIdType ptId = 0; ptId < geometry->GetNumberOfPoints(); ++ptId)
    {
        geometry->getPoints()->GetPoint(ptId, trianglePoint);

        bounds[0] = trianglePoint[0] - 0.01;
        bounds[1] = trianglePoint[0] + 0.01;
        bounds[2] = trianglePoint[1] - 0.01;
        bounds[3] = trianglePoint[1] + 0.01;
        bounds[4] = trianglePoint[2] - 0.01;
        bounds[5] = trianglePoint[2] + 0.01;

        cellLocator->FindCellsWithinBounds(bounds, foundCells);

        int size = foundCells->GetNumberOfIds(); // is always two
    }

The trianglePoint is e.g. (0 0 0) (first iteration of the loop) so I should
get only one triangle, but I get always two triangles. The bb is small
enough and there is a point which correspons to only one triangle.



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