forked from 1b-agent/fieldcraft-upstream
The bodies' elements are reflected across a datum plane (or a point and normal) with fieldcraft_mesh::mirror and joined on it. The image is tagged as the design's body at the reflected place (found by volume and centroid, or named in `as`), its faces with that body's faces under them, so sets by face name reach both halves. Half a bar meshed hex8 or hex20 and mirrored has the whole bar's node and element counts and volume, and its bending deflection to 1e-12; tet4 and tet10 mirror valid and conforming. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo