@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
• Registry Contracts - Plugin and node-definition APIs shared by renderers and editor tools
• 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
• Capture Contracts (@pascal-app/core/capture) - Versioned capture-session manifests, normalized stream descriptors, packet headers, and transport-neutral static/live CaptureSource implementations

Usage

import { useScene, WallNode } from '@pascal-app/core'

// Create a wall
const wall = WallNode.parse({
  start: [0, 0],
  end: [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 container
• BuildingNode - Building within a site
• LevelNode - Floor level
• WallNode - Vertical wall with optional openings
• SlabNode - Floor slab
• CeilingNode - Ceiling surface
• RoofNode - Roof geometry
• ZoneNode - Spatial zone/room
• ItemNode - Furniture, fixtures, appliances
• ScanNode - 3D scan reference
• GuideNode - 2D guide image reference

Built-in Node Definitions

Core contains the schemas, scene state, and registry contracts. The built-in node definitions, renderers, geometry builders, tools, and systems ship in @pascal-app/nodes:

import { loadPlugin } from '@pascal-app/core'
import { builtinPlugin } from '@pascal-app/nodes'

await loadPlugin(builtinPlugin)

Load the plugin before mounting @pascal-app/viewer. See the @pascal-app/viewer quick start for a React example.

Capture Sessions

Capture contracts are a self-contained subpath — no React, no Three.js, no prescribed transport:

import { createHttpCaptureSource, type CaptureSessionLocator } from '@pascal-app/core/capture'

const locator: CaptureSessionLocator = {
  sessionId: 'capture_123',
  manifestUrl: '/api/captures/capture_123/manifest',
}

const source = createHttpCaptureSource(locator, { credentials: 'include' })
const descriptor = await source.describe()

For live producers, use PushCaptureSource directly or implement CaptureSource.subscribe() with the same descriptor and packet event contract. The reference renderers that consume these sources ship in @pascal-app/viewer/capture.

License

MIT