forked from 1b-agent/opencadstudio-upstream
SLICE now takes MESH, polygon mesh and polyface mesh objects. A mesh that closes a volume is sliced as a solid, so each side is capped and becomes a 3D solid. An open mesh, such as a pipe run imported without end caps, is clipped face by face and each side stays a mesh, open along the cut. Keeping one side or both works as for solids, in one undo step. Refs #1398 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>