Handle the case when the stripper has more than 1 line #95
Description
In BezierGrindingSurfacing::generateTrajectory if the vtkStripper (after slicing) has more than 1 line we need to handle that case carefully.
It means that either there is a bug elsewhere or simply that the mesh has a hole.
We need to handle this case both for the grinding/extrication lines.
Possible cases:
- Grinding line has multiple lines, extrication has 1 line
- Grinding line has 1 line, extrication has multiple lines
- Both grinding/extrication have more than 1 line