Same shape as fence — thin renderer + system re-export, capabilities
declared, panel slider-drag fix recipe applied. Pure geometry +
floor-plan ports are later milestones.
Files added (packages/nodes/src/slab/):
- schema.ts: re-exports SlabNode from core.
- parametrics.ts: elevation slider only. Polygon + holes edited
via floor-plan boundary / hole editors, not number inputs.
- definition.ts: capabilities (no `movable` — slab move is bespoke
whole-translation through MoveSlabTool that integrates with the
boundary editor; capability-driven dispatch keeps the legacy mover),
surfaces.top with elevation-as-height for stacked items, relations
(hosts: ['item'], cascadeDelete: 'descendants'), toolHints (trace /
finish / cancel for the placement tool).
- renderer.tsx: thin placeholder mesh + markDirty on mount + node
events + cached material via the same getSlabMaterial pattern as
the legacy renderer (preset apply on shared material instance).
- system.tsx: re-exports the legacy SlabSystem from viewer.
- index.ts: barrel.
Files changed:
- packages/viewer/src/index.ts: exports SlabSystem (already had
DEFAULT_SLAB_MATERIAL, applyMaterialPresetToMaterials, createMaterial
from earlier exports).
- packages/nodes/src/index.ts: appends slabDefinition unconditionally
to builtinPlugin.nodes.
- packages/editor/src/components/ui/panels/slab-panel.tsx: applied
the panel slider-drag fix recipe from plans/editor-node-registry.md
prophylactically (nodeRef pattern, useScene.getState().updateNode
inside handler, drop subscribed updateNode dep). Slab's elevation
slider is the only drag-driven control in the panel — would have
triggered the same Maximum update depth cascade as wall/fence.
No behavior change. Slab now mounts via the registry path, but the
legacy SlabSystem still does the actual polygon triangulation + hole
CSG work (re-exported, not duplicated).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
