Translations:Surface Filling/29/en

The surface code from the internal OpenCASCADE modelling kernel is fragile, and cannot handle wrong input properly. The following situations may cause problems, and may crash the program, so they should be avoided:
 * Adding to that would result in several closed faces. In this case, those edges should be added as  to control the curvature only.
 * Using parametric (for example, ) that when recomputed fail to produce a closed boundary. That is, the edges to be used as  must always form a closed shape, even if their internal properties change.