Holes in dilated meshes

[FrancoisLasson]

To generate extrication paths, bezier_library uses a morphological dilation.
This dilation is applied on the input_mesh with different depths depending on the considered pass (cf. extrication_coefficiant_ and extrication_frequency_)

In case where depth is to high, several unexpected holes appear in dilated meshes.
Dilation process with VTK rendering :

Dilated mesh without hole

Dilated mesh with holes

Extrication paths are generated on dilated meshes with the cutting process. Due to these holes, the returned slices from cutting function are divided in some parts what generates strange extrication paths.

We could see :

• Half extrication paths
• Ignored extrication paths

Moreover, these problems could affect the last extrication path of pass (from last to first line) and generate collision problems.

To fix these problems, we have to work on the dilation process.

[VictorLamoine]

See: #132 (comment)