Pure traversal that walks a node's declared `relations` and returns the
full set of IDs that should be marked dirty alongside it. Two
implementations:
- `cascadeDirty(id, ctx)` — follows `hosts` (matching children) and
`affectsSpatial` (via injected spatialQuery). Phase 3 will add
`linkedBy: 'endpoint-match'`.
- `collectDescendants(id, ctx)` — pure subtree traversal for
`cascadeDelete: 'descendants'` and subtree deletion tools.
Both bounded by maxDepth (default 16) and visited-set so cycles in
bad data can't loop forever.
Context-based design: spatialQuery and childQuery are injected, so the
resolver itself stays pure — the DragAction runtime can plug in
spatialGridManager-backed queries; tests pass stubs.
Today, registry has no kinds → cascadeDirty(id) always returns just
{id}. No behavior change. Phase 3 wall is the first real consumer.
11 unit tests cover empty/no-relations baseline, hosts cascade, depth
limit, spatial query, missing spatialQuery branch, cycle protection,
childQuery override, descendant collection.
Co-Authored-By: Claude Opus 4.7 (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