Thanks for your answers, DerAchim, abSpahn and Nemo.
Well, in our tests, we can cut 3D line or 3d-polyline, if all them are touching itself (between cutting element and the element to be cutted).
I will try to explain our scope:
1- Source: a topography, with 3D-polylines with z values
2- Scope: a topography, with 3D-polylines (with z values) cutted by a 2D square (in one click, If it's possible)
I upload an image with topography and 2D square.
Thanks to all,
Xavier Coll • Architect, Project Manager I+D, BIM Manager, BIM Auditor
EiPM • http://www.eipm.es/en/