### Collision model of the Tongue

Description:

A node "TongueCollisionModel" is added to take the collision with the tongue into account.
We could use a different mesh (less detailed for example) of the tongue for the collision model, or (like here) we can use only the surface of the volumetric mesh used in the deformable model. This is done via a topological mapping (see Topological mapping tutorial to learn more).