Proves the unified (nodeId, slotId) slot contract on a procedural generator, beyond items and walls. A shelf now exposes three paintable slots — shelves / frame / back — painted through the same PaintCapability dispatch and the same node.slots: Record<slotId, MaterialRef> shape items use. Foundation (shared, reusable by future procedural kinds): - core: SlotDeclaration type + capabilities.slots(node) registry declaration; GeometryContext gains `materials` so a pure builder can resolve scene:<id> slot refs without importing useScene. - viewer GeometrySystem: threads the scene material library into every builder ctx, and re-dirties (bypassing the geometryKey skip) any geometry node that references a scene material when that material changes — so editing a custom colour propagates to every shelf using it, matching items. Shelf: - schema: slots: Record<string, MaterialRef> (mirrors ItemNode). - geometry: per-slot material resolution (slot override -> legacy whole-shelf -> declared default colour); every mesh stamped with userData.slotId; DEFAULT_SHELF_MATERIAL retired (declared default gives identical off-white). - paint.ts: PaintCapability (resolveRole from userData.slotId, scene-material commit for one-off colours, preview restricted to __fromGeometry meshes so hosted items aren't ghosted, getEffectiveMaterial incl. legacy fallback). - definition: paint + slots capabilities; slots folded into geometryKey. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@pascal-app/core
Core library for Pascal 3D building editor.
Installation
npm install @pascal-app/core
Peer Dependencies
npm install react three @react-three/fiber @react-three/drei
What's Included
- Node Schemas - Zod schemas for all building primitives (walls, slabs, items, etc.)
- Scene State - Zustand store with IndexedDB persistence and undo/redo
- Systems - Geometry generation for walls, floors, ceilings, roofs
- Scene Registry - Fast lookup from node IDs to Three.js objects
- Spatial Grid - Collision detection and placement validation
- Event Bus - Typed event emitter for inter-component communication
- Asset Storage - IndexedDB-based file storage for user-uploaded assets
Usage
import { useScene, WallNode, ItemNode } from '@pascal-app/core'
// Create a wall
const wall = WallNode.parse({
points: [[0, 0], [5, 0]],
height: 3,
thickness: 0.2,
})
useScene.getState().createNode(wall, parentLevelId)
// Subscribe to scene changes
function MyComponent() {
const nodes = useScene((state) => state.nodes)
const walls = Object.values(nodes).filter(n => n.type === 'wall')
return <div>Total walls: {walls.length}</div>
}
Node Types
SiteNode- Root containerBuildingNode- Building within a siteLevelNode- Floor levelWallNode- Vertical wall with optional openingsSlabNode- Floor slabCeilingNode- Ceiling surfaceRoofNode- Roof geometryZoneNode- Spatial zone/roomItemNode- Furniture, fixtures, appliancesScanNode- 3D scan referenceGuideNode- 2D guide image reference
Systems
Systems process dirty nodes each frame to update geometry:
WallSystem- Wall geometry with mitering and CSG cutoutsSlabSystem- Floor polygon generationCeilingSystem- Ceiling geometryRoofSystem- Roof generationItemSystem- Item positioning on walls/ceilings/floors
License
MIT