Openings now host on the walls a roof segment generates — the base
walls under the roof and the coplanar gable/shed/gambrel end faces, so
a window can sit in a gable pediment.
- core: roof-segment-walls.ts models the four vertical faces as 2D
frames (u along face, v height) with convex profile polygons that
mirror the wall volume getRoofSegmentBrushes builds; rect-in-profile
clamping and anchored resize limits via half-plane algebra.
- schemas: optional roofSegmentId on door/window; position is the
segment-local wall mid-plane center, rotation[1] the face yaw.
- cut: reuses capabilities.roofAccessory.buildCut; new cutScope: 'wall'
subtracts from the wall brush only. cascadesViaHostSegment keeps the
roof-merge loop from consuming door/window dirty marks (their own
systems cascade via parentId).
- tools: roof:* handlers in door/window tool + move-tool (the Build-tab
preset path), with roofSegmentId cleared/restored across every
roof<->wall re-anchor and revert; shared hit resolver normalizes
normals through world space (merged mesh vs painted segment frames).
- fix: RoofSystem no longer rebuilds per-segment CSG in accessory-reveal
mode — the uncut rebuild used to draw over the merged shell's fresh
opening until deselect.
- fix: the walkthrough collider world now prunes by renderer-effective
visibility; stale uncut segment CSG inside the hidden segments-wrapper
blocked the player at openings the merged shell had cut through.
Known gap: painted segments render per-segment CSG without accessory
cuts (pre-existing, also affects skylight/dormer). Twice Codex-reviewed;
details in private-editor plans/editor-roof-wall-openings.md.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
