Module visibility 

Visibility masks for solid faces, edges, vertices, and named overlays.

EntityVisibility stores hidden indices; GroupState gives Scene-tree checkboxes a tristate readout. Reused solids retain their masks, while newly tessellated solids start visible. The renderer skips hidden geometry and coalesces contiguous visible face ranges without rebuilding meshes.

Structs

EntityVisibility

The hidden-entity sets of ONE solid (empty = all visible). Indices are into the owning SolidDisplay’s faces / edges / vertices.

Enums

EntityKind

Which sub-entity list of a solid a visibility toggle addresses.

GroupState

A group checkbox’s tristate: every entity of the kind shown, none shown, or a mix. An empty group reads All — nothing to hide.