feat(mcp,editor): Option A+B storage + 10 agent deliverables (Phase 7)

Ships the combined filesystem/Supabase storage adapter + MCP scene
lifecycle tools + Next.js API routes + editor /scene/[id] route, so
an MCP save is directly openable at /scene/<id> without any
injection hack. End-to-end verified: 10/10 e2e steps pass.

Storage (A1/A2/A3):
- SceneStore interface + error classes + slug helpers
- FilesystemSceneStore at $PASCAL_DATA_DIR (defaults XDG/~/.pascal)
  with atomic writes, .index sidecar, optimistic locking
- SupabaseSceneStore with scenes + scene_revisions tables, RLS
  migration SQL, mock-backed unit tests
- createSceneStore(env) auto-selects based on SUPABASE_URL +
  SUPABASE_SERVICE_ROLE_KEY

MCP tools (A4, A8, A9, A10):
- save_scene / load_scene / list_scenes / delete_scene / rename_scene
- list_templates / create_from_template (3 seed templates:
  empty-studio, two-bedroom, garden-house)
- generate_variants (7 mutation kinds, seeded RNG, save=true|false)
- photo_to_scene (vision sampling → scene graph → save)

Editor (A5, A6):
- /api/scenes + /api/scenes/[id] with RFC 7232 If-Match locking
- /scene/[id] and /scenes route pages with save button, SceneLoader
- Removed the window.__pascalScene dev injection hack

Security + UX edges (A7, A8):
- AssetUrl Zod validator: asset:// blob: data:image/ /path https:
  (http://localhost for dev) + PASCAL_ALLOWED_ASSET_ORIGINS env
  allowlist. Hardens scan.url, guide.url, item.asset.src,
  material.texture.url, MaterialMaps.*Map
- Auto-frame camera on empty→non-empty scene transition
  (camera-controls:fit-scene emitter event)

Shared utilities:
- rehydrateSiteChildren() extracted to packages/mcp/src/lib/ and
  used by both create-from-template and generate-variants to work
  around the SiteNode.children-as-objects vs. ids inconsistency
  (CROSS_CUTTING §2)
- Storage + MCP subpath exports added to packages/mcp/package.json
  (CROSS_CUTTING §4)

Tests: 293 pass / 0 fail across 40 files (was 142 pre-Phase-7).
Biome: clean.

Phase-7 e2e script at packages/mcp/test-reports/phase7-e2e.ts:
MCP HTTP + editor Next.js both point at $PASCAL_DATA_DIR =
/tmp/pascal-e2e, save_scene from MCP, GET /api/scenes/<id> from
editor server, /scenes list page renders all saved scenes, scene
page renders SceneLoader, delete_scene works.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Adrian Perez
2026-04-18 19:29:28 +02:00
co-authored by Claude Opus 4.7
parent 42bd05db9c
commit e8d0b13ff5
81 changed files with 8933 additions and 1213 deletions
@@ -0,0 +1,295 @@
import { beforeEach, describe, expect, test } from 'bun:test'
import { Client } from '@modelcontextprotocol/sdk/client/index.js'
import { InMemoryTransport } from '@modelcontextprotocol/sdk/inMemory.js'
import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'
import type { SceneGraph } from '@pascal-app/core/clone-scene-graph'
import { type AnyNodeId, AnyNode as AnyNodeSchema } from '@pascal-app/core/schema'
import { SceneBridge } from '../../bridge/scene-bridge'
import {
InMemorySceneStore,
parseToolText,
type StoredTextContent,
} from '../scene-lifecycle/test-utils'
import { registerGenerateVariants } from './generate-variants'
type Variant = {
index: number
description: string
nodeCount: number
sceneId?: string
url?: string
graph?: SceneGraph
}
function emptyBase(): SceneGraph {
return {
nodes: {
site_empty: {
object: 'node',
id: 'site_empty',
type: 'site',
parentId: null,
visible: true,
metadata: {},
polygon: {
type: 'polygon',
points: [
[-5, -5],
[5, -5],
[5, 5],
[-5, 5],
],
},
children: [],
},
} as unknown as SceneGraph['nodes'],
rootNodeIds: ['site_empty'] as AnyNodeId[],
}
}
async function setup(): Promise<{
client: Client
bridge: SceneBridge
store: InMemorySceneStore
}> {
const bridge = new SceneBridge()
bridge.setScene({}, [])
bridge.loadDefault()
const store = new InMemorySceneStore()
const server = new McpServer({ name: 'test', version: '0.0.0' })
registerGenerateVariants(server, bridge, store)
const [srvT, cliT] = InMemoryTransport.createLinkedPair()
const client = new Client({ name: 'test-client', version: '0.0.0' })
await Promise.all([server.connect(srvT), client.connect(cliT)])
return { client, bridge, store }
}
describe('generate_variants', () => {
let client: Client
let bridge: SceneBridge
let store: InMemorySceneStore
beforeEach(async () => {
;({ client, bridge, store } = await setup())
})
test('happy path: returns count variants that exercise the mutation', async () => {
// Seed the bridge scene with some walls of known thickness.
const base = bridge.exportJSON()
// Find the level and add a couple of walls.
const level = Object.values(base.nodes).find((n) => n.type === 'level')
expect(level).toBeDefined()
const withWalls: SceneGraph = {
nodes: {
...base.nodes,
wall_1: {
object: 'node',
id: 'wall_1',
type: 'wall',
parentId: level?.id ?? null,
visible: true,
metadata: {},
start: [0, 0],
end: [5, 0],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
wall_2: {
object: 'node',
id: 'wall_2',
type: 'wall',
parentId: level?.id ?? null,
visible: true,
metadata: {},
start: [0, 5],
end: [5, 5],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
} as unknown as SceneGraph['nodes'],
rootNodeIds: base.rootNodeIds,
}
bridge.setScene(withWalls.nodes, withWalls.rootNodeIds)
const result = await client.callTool({
name: 'generate_variants',
arguments: {
count: 3,
vary: ['wall-thickness'],
seed: 42,
},
})
expect(result.isError).toBeFalsy()
const parsed = parseToolText(result.content as StoredTextContent[]) as unknown as {
variants: Variant[]
}
expect(parsed.variants.length).toBe(3)
for (const v of parsed.variants) {
expect(v.graph).toBeDefined()
// Every wall's thickness is in the allowed set.
const allowed = new Set([0.1, 0.15, 0.2, 0.25])
for (const node of Object.values((v.graph as SceneGraph).nodes)) {
if (node.type !== 'wall') continue
expect(allowed.has((node as { thickness: number }).thickness)).toBe(true)
}
}
})
test('deterministic: same seed yields same mutation outputs', async () => {
// Seed walls so the mutation has something to act on.
const base = bridge.exportJSON()
const level = Object.values(base.nodes).find((n) => n.type === 'level')
const withWalls: SceneGraph = {
nodes: {
...base.nodes,
wall_a: {
object: 'node',
id: 'wall_a',
type: 'wall',
parentId: level?.id ?? null,
visible: true,
metadata: {},
start: [0, 0],
end: [4, 0],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
wall_b: {
object: 'node',
id: 'wall_b',
type: 'wall',
parentId: level?.id ?? null,
visible: true,
metadata: {},
start: [0, 4],
end: [4, 4],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
} as unknown as SceneGraph['nodes'],
rootNodeIds: base.rootNodeIds,
}
bridge.setScene(withWalls.nodes, withWalls.rootNodeIds)
const args = { count: 2, vary: ['wall-thickness'], seed: 123 }
const r1 = await client.callTool({ name: 'generate_variants', arguments: args })
const r2 = await client.callTool({ name: 'generate_variants', arguments: args })
const p1 = parseToolText(r1.content as StoredTextContent[]) as unknown as {
variants: Variant[]
}
const p2 = parseToolText(r2.content as StoredTextContent[]) as unknown as {
variants: Variant[]
}
expect(p1.variants.length).toBe(p2.variants.length)
// Compare the mutated fields (not the ids, which fresh-nanoid each time).
function wallThicknesses(g: SceneGraph): number[] {
return Object.values(g.nodes)
.filter((n) => n.type === 'wall')
.map((w) => (w as { thickness: number }).thickness)
.sort()
}
for (let i = 0; i < p1.variants.length; i++) {
const t1 = wallThicknesses(p1.variants[i]?.graph as SceneGraph)
const t2 = wallThicknesses(p2.variants[i]?.graph as SceneGraph)
expect(t1).toEqual(t2)
}
})
test('no-op: empty scene + wall-thickness still returns count graphs, unchanged', async () => {
const graph = emptyBase()
// Save, then reference by id.
const meta = await store.save({ name: 'empty', graph })
const result = await client.callTool({
name: 'generate_variants',
arguments: {
baseSceneId: meta.id,
count: 3,
vary: ['wall-thickness'],
seed: 99,
},
})
expect(result.isError).toBeFalsy()
const parsed = parseToolText(result.content as StoredTextContent[]) as unknown as {
variants: Variant[]
}
expect(parsed.variants.length).toBe(3)
for (const v of parsed.variants) {
const g = v.graph as SceneGraph
expect(g).toBeDefined()
// No walls were present — so node counts should match the (forked) base.
expect(Object.keys(g.nodes).length).toBe(Object.keys(graph.nodes).length)
}
})
test('save=true: each variant gets a sceneId and url', async () => {
const result = await client.callTool({
name: 'generate_variants',
arguments: {
count: 2,
vary: ['wall-thickness'],
seed: 55,
save: true,
},
})
expect(result.isError).toBeFalsy()
const parsed = parseToolText(result.content as StoredTextContent[]) as unknown as {
variants: Variant[]
}
expect(parsed.variants.length).toBe(2)
for (const v of parsed.variants) {
expect(typeof v.sceneId).toBe('string')
expect(v.url).toBe(`/scene/${v.sceneId}`)
// Inline graph should be omitted.
expect(v.graph).toBeUndefined()
}
const listed = await store.list()
expect(listed.length).toBe(2)
})
test('baseSceneId not found returns an error', async () => {
const result = await client.callTool({
name: 'generate_variants',
arguments: {
baseSceneId: 'scene_does_not_exist',
count: 2,
vary: ['wall-thickness'],
seed: 1,
},
})
expect(result.isError).toBe(true)
})
test('every returned variant validates against AnyNode', async () => {
const result = await client.callTool({
name: 'generate_variants',
arguments: {
count: 3,
vary: ['wall-thickness', 'wall-height'],
seed: 7,
},
})
expect(result.isError).toBeFalsy()
const parsed = parseToolText(result.content as StoredTextContent[]) as unknown as {
variants: Variant[]
}
for (const v of parsed.variants) {
const g = v.graph as SceneGraph
for (const node of Object.values(g.nodes)) {
const res = AnyNodeSchema.safeParse(node)
expect(res.success).toBe(true)
}
}
})
})
@@ -0,0 +1,197 @@
import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'
import { forkSceneGraph, type SceneGraph } from '@pascal-app/core/clone-scene-graph'
import { type AnyNode, AnyNode as AnyNodeSchema } from '@pascal-app/core/schema'
import { z } from 'zod'
import type { SceneBridge } from '../../bridge/scene-bridge'
import type { SceneStore } from '../../storage/types'
import { ErrorCode, throwMcpError } from '../errors'
import { applyMutation, describeVariant, type MutationKind, mulberry32 } from './mutations'
const MUTATION_KINDS = [
'wall-thickness',
'wall-height',
'zone-labels',
'room-proportions',
'open-plan',
'door-positions',
'fence-style',
] as const
export const generateVariantsInput = {
baseSceneId: z
.string()
.optional()
.describe('If set, fork from this saved scene; else fork from current bridge state.'),
count: z.number().int().min(1).max(10).default(3),
vary: z.array(z.enum(MUTATION_KINDS)).min(1).default(['wall-thickness', 'wall-height']),
seed: z.number().int().optional().describe('Deterministic RNG seed.'),
save: z
.boolean()
.default(false)
.describe('If true, also save each variant via SceneStore and return ids.'),
}
export const generateVariantsOutput = {
variants: z.array(
z.object({
index: z.number(),
description: z.string(),
nodeCount: z.number(),
sceneId: z.string().optional(),
url: z.string().optional(),
graph: z.any().optional(),
}),
),
}
/**
* `forkSceneGraph` normalises `SiteNode.children` to string IDs, but the
* `SiteNode` schema declares that field as an array of full `BuildingNode` /
* `ItemNode` objects (see CROSS_CUTTING §2). To keep variants validating
* against `AnyNode`, re-embed the site children from the flat dict.
*
* Pure: returns a new graph without mutating the input.
*/
function rehydrateSiteChildren(graph: SceneGraph): SceneGraph {
const out: SceneGraph = {
nodes: { ...graph.nodes },
rootNodeIds: [...graph.rootNodeIds],
...(graph.collections ? { collections: graph.collections } : {}),
}
for (const [id, node] of Object.entries(out.nodes)) {
if (node.type !== 'site') continue
const childrenField = (node as { children?: unknown[] }).children
if (!Array.isArray(childrenField)) continue
const rehydrated: AnyNode[] = []
for (const child of childrenField) {
if (typeof child === 'string') {
const target = out.nodes[child as keyof typeof out.nodes]
if (target && (target.type === 'building' || target.type === 'item')) {
rehydrated.push(target)
}
} else if (child && typeof child === 'object' && 'id' in (child as Record<string, unknown>)) {
rehydrated.push(child as AnyNode)
}
}
out.nodes[id as keyof typeof out.nodes] = {
...(node as AnyNode),
children: rehydrated,
} as AnyNode
}
return out
}
/**
* Count how many nodes in a graph fail `AnyNode` validation. Used to keep the
* tool from returning silently corrupt variants.
*/
function countInvalidNodes(graph: SceneGraph): number {
let invalid = 0
for (const node of Object.values(graph.nodes)) {
if (!AnyNodeSchema.safeParse(node).success) invalid++
}
return invalid
}
export function registerGenerateVariants(
server: McpServer,
bridge: SceneBridge,
store: SceneStore,
): void {
server.registerTool(
'generate_variants',
{
title: 'Generate variants',
description:
'Generate N variations of a base scene by forking and applying seeded mutations. Example: "give me 5 variations of this kitchen". If `save=true`, each variant is persisted via the SceneStore and returned with an id + URL; otherwise the graph is returned inline.',
inputSchema: generateVariantsInput,
outputSchema: generateVariantsOutput,
},
async ({ baseSceneId, count, vary, seed, save }) => {
// 1. Obtain the base SceneGraph.
let base: SceneGraph
let baseName = 'scene'
if (baseSceneId) {
const loaded = await store.load(baseSceneId)
if (!loaded) {
throwMcpError(ErrorCode.InvalidParams, 'scene_not_found', { id: baseSceneId })
}
base = loaded.graph
baseName = loaded.name
} else {
const exported = bridge.exportJSON()
base = {
nodes: exported.nodes,
rootNodeIds: exported.rootNodeIds,
collections: exported.collections as SceneGraph['collections'],
}
}
// 2. Seed the RNG. Default seed is a time-ish number so runs vary, but
// tests always pass a fixed seed for determinism.
const initialSeed = seed ?? Math.floor(Math.random() * 0xffffffff)
const mutations = vary as MutationKind[]
const variants: Array<{
index: number
description: string
nodeCount: number
sceneId?: string
url?: string
graph?: SceneGraph
}> = []
for (let i = 0; i < count; i++) {
// Each variant gets its own RNG stream derived from (seed + i) so
// results are deterministic per-index.
const rng = mulberry32(initialSeed + i)
let forked: SceneGraph = forkSceneGraph(base)
for (const kind of mutations) {
forked = applyMutation(forked, rng, kind)
}
// Re-embed site children so variants match the SiteNode schema.
forked = rehydrateSiteChildren(forked)
const invalidCount = countInvalidNodes(forked)
if (invalidCount > 0) {
throwMcpError(
ErrorCode.InternalError,
`variant_invalid: variant ${i} produced ${invalidCount} invalid node(s)`,
{ index: i },
)
}
const nodeCount = Object.keys(forked.nodes).length
const description = describeVariant(forked, mutations)
if (save) {
try {
const meta = await store.save({
name: `${baseName}-variant-${i + 1}`,
graph: forked,
})
variants.push({
index: i,
description,
nodeCount,
sceneId: meta.id,
url: `/scene/${meta.id}`,
})
} catch (err) {
const msg = err instanceof Error ? err.message : String(err)
throwMcpError(ErrorCode.InternalError, `save_failed: ${msg}`, { index: i })
}
} else {
variants.push({ index: i, description, nodeCount, graph: forked })
}
}
const payload = { variants }
return {
content: [{ type: 'text' as const, text: JSON.stringify(payload) }],
structuredContent: payload,
}
},
)
}
+30
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import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'
import type { SceneBridge } from '../../bridge/scene-bridge'
import type { SceneStore } from '../../storage/types'
import { registerGenerateVariants } from './generate-variants'
/**
* Register the variant-generation MCP tools against the given server. Uses the
* supplied `SceneStore` both to load a `baseSceneId` (when provided) and to
* persist variants when `save=true`.
*/
export function registerVariantTools(
server: McpServer,
bridge: SceneBridge,
store: SceneStore,
): void {
registerGenerateVariants(server, bridge, store)
}
export {
generateVariantsInput,
generateVariantsOutput,
registerGenerateVariants,
} from './generate-variants'
export {
applyMutation,
describeVariant,
type MutationKind,
mulberry32,
type Rng,
} from './mutations'
@@ -0,0 +1,409 @@
import { describe, expect, test } from 'bun:test'
import type { SceneGraph } from '@pascal-app/core/clone-scene-graph'
import type { AnyNodeId } from '@pascal-app/core/schema'
import { applyMutation, mulberry32 } from './mutations'
function makeBaseGraph(): SceneGraph {
const nodes: SceneGraph['nodes'] = {
site_a: {
object: 'node',
id: 'site_a',
type: 'site',
parentId: null,
visible: true,
metadata: {},
polygon: {
type: 'polygon',
points: [
[-10, -10],
[10, -10],
[10, 10],
[-10, 10],
],
},
children: [],
},
building_a: {
object: 'node',
id: 'building_a',
type: 'building',
parentId: 'site_a',
visible: true,
metadata: {},
position: [0, 0, 0],
rotation: [0, 0, 0],
children: ['level_a'],
},
level_a: {
object: 'node',
id: 'level_a',
type: 'level',
parentId: 'building_a',
visible: true,
metadata: {},
children: ['wall_n', 'wall_s', 'wall_e', 'wall_w', 'wall_mid', 'zone_kitchen', 'zone_living'],
},
wall_n: {
object: 'node',
id: 'wall_n',
type: 'wall',
parentId: 'level_a',
visible: true,
metadata: {},
start: [-10, 10],
end: [10, 10],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
wall_s: {
object: 'node',
id: 'wall_s',
type: 'wall',
parentId: 'level_a',
visible: true,
metadata: {},
start: [-10, -10],
end: [10, -10],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
wall_e: {
object: 'node',
id: 'wall_e',
type: 'wall',
parentId: 'level_a',
visible: true,
metadata: {},
start: [10, -10],
end: [10, 10],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
wall_w: {
object: 'node',
id: 'wall_w',
type: 'wall',
parentId: 'level_a',
visible: true,
metadata: {},
start: [-10, -10],
end: [-10, 10],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
wall_mid: {
object: 'node',
id: 'wall_mid',
type: 'wall',
parentId: 'level_a',
visible: true,
metadata: {},
start: [-5, 0],
end: [5, 0],
thickness: 0.1,
height: 2.5,
children: ['door_mid'],
frontSide: 'unknown',
backSide: 'unknown',
},
door_mid: {
object: 'node',
id: 'door_mid',
type: 'door',
parentId: 'wall_mid',
visible: true,
metadata: {},
position: [0, 0, 0],
rotation: [0, 0, 0],
wallId: 'wall_mid',
width: 0.9,
height: 2.1,
frameThickness: 0.05,
frameDepth: 0.07,
threshold: true,
thresholdHeight: 0.02,
hingesSide: 'left',
swingDirection: 'inward',
segments: [],
handle: true,
handleHeight: 1.05,
handleSide: 'right',
contentPadding: [0.04, 0.04],
doorCloser: false,
panicBar: false,
panicBarHeight: 1.0,
},
zone_kitchen: {
object: 'node',
id: 'zone_kitchen',
type: 'zone',
parentId: 'level_a',
visible: true,
metadata: {},
name: 'Kitchen',
polygon: [
[-5, 0],
[5, 0],
[5, 10],
[-5, 10],
],
color: '#ff0000',
},
zone_living: {
object: 'node',
id: 'zone_living',
type: 'zone',
parentId: 'level_a',
visible: true,
metadata: {},
name: 'Living',
polygon: [
[-5, -10],
[5, -10],
[5, 0],
[-5, 0],
],
color: '#00ff00',
},
fence_1: {
object: 'node',
id: 'fence_1',
type: 'fence',
parentId: 'site_a',
visible: true,
metadata: {},
start: [-8, -8],
end: [8, -8],
height: 1.8,
thickness: 0.08,
baseHeight: 0.22,
postSpacing: 2,
postSize: 0.1,
topRailHeight: 0.04,
groundClearance: 0,
edgeInset: 0.015,
baseStyle: 'grounded',
color: '#ffffff',
style: 'slat',
},
} as unknown as SceneGraph['nodes']
return {
nodes,
rootNodeIds: ['site_a'] as AnyNodeId[],
}
}
describe('mulberry32', () => {
test('is deterministic for the same seed', () => {
const a = mulberry32(42)
const b = mulberry32(42)
for (let i = 0; i < 10; i++) {
expect(a()).toBe(b())
}
})
test('produces values in [0, 1)', () => {
const rng = mulberry32(7)
for (let i = 0; i < 100; i++) {
const v = rng()
expect(v).toBeGreaterThanOrEqual(0)
expect(v).toBeLessThan(1)
}
})
})
describe('applyMutation: wall-thickness', () => {
test('assigns every wall a thickness from the fixed set', () => {
const rng = mulberry32(1)
const out = applyMutation(makeBaseGraph(), rng, 'wall-thickness')
const allowed = new Set([0.1, 0.15, 0.2, 0.25])
let walls = 0
for (const node of Object.values(out.nodes)) {
if (node.type !== 'wall') continue
walls++
expect(allowed.has((node as { thickness: number }).thickness)).toBe(true)
}
expect(walls).toBeGreaterThan(0)
})
test('does not mutate the input graph', () => {
const base = makeBaseGraph()
const before = JSON.stringify(base)
applyMutation(base, mulberry32(5), 'wall-thickness')
expect(JSON.stringify(base)).toBe(before)
})
})
describe('applyMutation: wall-height', () => {
test('assigns every wall a height from the fixed set', () => {
const rng = mulberry32(2)
const out = applyMutation(makeBaseGraph(), rng, 'wall-height')
const allowed = new Set([2.4, 2.6, 2.7, 3.0])
for (const node of Object.values(out.nodes)) {
if (node.type !== 'wall') continue
expect(allowed.has((node as { height: number }).height)).toBe(true)
}
})
})
describe('applyMutation: zone-labels', () => {
test('shuffles labels but preserves the set', () => {
const base = makeBaseGraph()
const rng = mulberry32(3)
const out = applyMutation(base, rng, 'zone-labels')
const before = new Set<string>()
for (const node of Object.values(base.nodes)) {
if (node.type === 'zone') before.add((node as { name: string }).name)
}
const after = new Set<string>()
for (const node of Object.values(out.nodes)) {
if (node.type === 'zone') after.add((node as { name: string }).name)
}
expect(after).toEqual(before)
})
})
describe('applyMutation: room-proportions', () => {
test('only nudges interior walls, leaves perimeter alone', () => {
const base = makeBaseGraph()
const rng = mulberry32(4)
const out = applyMutation(base, rng, 'room-proportions')
// Perimeter wall should be unchanged.
const n = out.nodes.wall_n as { start: [number, number]; end: [number, number] }
expect(n.start).toEqual([-10, 10])
expect(n.end).toEqual([10, 10])
// Interior wall should (usually) be different.
const mid = out.nodes.wall_mid as { start: [number, number]; end: [number, number] }
const midBase = base.nodes.wall_mid as { start: [number, number]; end: [number, number] }
const changed =
mid.start[0] !== midBase.start[0] ||
mid.start[1] !== midBase.start[1] ||
mid.end[0] !== midBase.end[0] ||
mid.end[1] !== midBase.end[1]
expect(changed).toBe(true)
})
})
describe('applyMutation: open-plan', () => {
test('removes exactly one interior wall and its attached openings', () => {
const base = makeBaseGraph()
const baseWallCount = Object.values(base.nodes).filter((n) => n.type === 'wall').length
const rng = mulberry32(5)
const out = applyMutation(base, rng, 'open-plan')
const afterWallCount = Object.values(out.nodes).filter((n) => n.type === 'wall').length
expect(afterWallCount).toBe(baseWallCount - 1)
// Interior wall `wall_mid` had a door — both should be gone.
expect(out.nodes.wall_mid).toBeUndefined()
expect(out.nodes.door_mid).toBeUndefined()
})
test('skips gracefully when there are no interior walls', () => {
const graph: SceneGraph = {
nodes: {
site_a: {
object: 'node',
id: 'site_a',
type: 'site',
parentId: null,
visible: true,
metadata: {},
polygon: {
type: 'polygon',
points: [
[-10, -10],
[10, -10],
[10, 10],
[-10, 10],
],
},
children: [],
},
wall_n: {
object: 'node',
id: 'wall_n',
type: 'wall',
parentId: 'site_a',
visible: true,
metadata: {},
start: [-10, 10],
end: [10, 10],
thickness: 0.1,
height: 2.5,
children: [],
frontSide: 'unknown',
backSide: 'unknown',
},
} as unknown as SceneGraph['nodes'],
rootNodeIds: ['site_a'] as AnyNodeId[],
}
const out = applyMutation(graph, mulberry32(9), 'open-plan')
expect(Object.keys(out.nodes)).toEqual(Object.keys(graph.nodes))
})
})
describe('applyMutation: door-positions', () => {
test('sets every door wallT in [0.2, 0.8]', () => {
const rng = mulberry32(6)
const out = applyMutation(makeBaseGraph(), rng, 'door-positions')
for (const node of Object.values(out.nodes)) {
if (node.type !== 'door') continue
const t = (node as { wallT?: number }).wallT
expect(typeof t).toBe('number')
expect(t as number).toBeGreaterThanOrEqual(0.2)
expect(t as number).toBeLessThanOrEqual(0.8)
}
})
})
describe('applyMutation: fence-style', () => {
test('sets every fence style to one of privacy/slat/rail', () => {
const rng = mulberry32(7)
const out = applyMutation(makeBaseGraph(), rng, 'fence-style')
const allowed = new Set(['privacy', 'slat', 'rail'])
for (const node of Object.values(out.nodes)) {
if (node.type !== 'fence') continue
expect(allowed.has((node as { style: string }).style)).toBe(true)
}
})
})
describe('applyMutation: no-op behaviour', () => {
test('wall-thickness on a graph with no walls leaves nodes unchanged', () => {
const graph: SceneGraph = {
nodes: {
site_a: {
object: 'node',
id: 'site_a',
type: 'site',
parentId: null,
visible: true,
metadata: {},
polygon: {
type: 'polygon',
points: [
[-1, -1],
[1, -1],
[1, 1],
[-1, 1],
],
},
children: [],
},
} as unknown as SceneGraph['nodes'],
rootNodeIds: ['site_a'] as AnyNodeId[],
}
const out = applyMutation(graph, mulberry32(8), 'wall-thickness')
expect(JSON.stringify(out.nodes)).toBe(JSON.stringify(graph.nodes))
})
})
@@ -0,0 +1,331 @@
import type { SceneGraph } from '@pascal-app/core/clone-scene-graph'
import type { AnyNode, AnyNodeId } from '@pascal-app/core/schema'
/** Mutation kinds handled by `applyMutation`. */
export type MutationKind =
| 'wall-thickness'
| 'wall-height'
| 'zone-labels'
| 'room-proportions'
| 'open-plan'
| 'door-positions'
| 'fence-style'
/** Deterministic 32-bit RNG. */
export type Rng = () => number
/**
* Tiny PRNG. Returns a function that produces uniformly distributed floats in
* [0, 1). Source: https://stackoverflow.com/a/47593316/17118
*/
export function mulberry32(seed: number): Rng {
let state = seed | 0
return () => {
state = (state + 0x6d2b79f5) | 0
let t = state
t = Math.imul(t ^ (t >>> 15), t | 1)
t ^= t + Math.imul(t ^ (t >>> 7), t | 61)
return ((t ^ (t >>> 14)) >>> 0) / 4294967296
}
}
/** Pick a random element from a non-empty array. */
function pickFrom<T>(rng: Rng, values: readonly T[]): T {
const idx = Math.floor(rng() * values.length)
return values[Math.min(idx, values.length - 1)] as T
}
/** Shallow clone a scene graph: nodes are copied one level deep, node dict is fresh. */
function cloneGraph(graph: SceneGraph): SceneGraph {
const clonedNodes: Record<AnyNodeId, AnyNode> = {} as Record<AnyNodeId, AnyNode>
for (const [id, node] of Object.entries(graph.nodes)) {
// structuredClone so sub-objects (arrays, tuples, metadata) are independent.
clonedNodes[id as AnyNodeId] = structuredClone(node) as AnyNode
}
return {
nodes: clonedNodes,
rootNodeIds: [...graph.rootNodeIds],
...(graph.collections ? { collections: structuredClone(graph.collections) } : {}),
}
}
const WALL_THICKNESS_OPTIONS = [0.1, 0.15, 0.2, 0.25] as const
const WALL_HEIGHT_OPTIONS = [2.4, 2.6, 2.7, 3.0] as const
const FENCE_STYLES = ['privacy', 'slat', 'rail'] as const
/** FisherYates shuffle in place using the provided RNG. */
function shuffleInPlace<T>(arr: T[], rng: Rng): void {
for (let i = arr.length - 1; i > 0; i--) {
const j = Math.floor(rng() * (i + 1))
const tmp = arr[i] as T
arr[i] = arr[j] as T
arr[j] = tmp
}
}
/**
* Compute 2D bounds (min/max x/z) of the first `site` node's polygon points,
* or `null` if no site is present.
*/
function siteBounds(
graph: SceneGraph,
): { minX: number; maxX: number; minZ: number; maxZ: number } | null {
for (const node of Object.values(graph.nodes)) {
if (node.type !== 'site') continue
const pts = (node as { polygon?: { points?: Array<[number, number]> } }).polygon?.points
if (!pts || pts.length === 0) continue
let minX = Infinity
let maxX = -Infinity
let minZ = Infinity
let maxZ = -Infinity
for (const [x, z] of pts) {
if (x < minX) minX = x
if (x > maxX) maxX = x
if (z < minZ) minZ = z
if (z > maxZ) maxZ = z
}
if (!Number.isFinite(minX)) continue
return { minX, maxX, minZ, maxZ }
}
return null
}
/**
* Heuristic: a wall is a perimeter wall if either of its endpoints sits close
* to the site polygon's bounding rectangle (within `epsilon`). Returns `false`
* if there is no site polygon (treat everything as interior so the mutations
* still exercise something on partial scenes).
*/
function isPerimeterWall(
wall: AnyNode & { start?: [number, number]; end?: [number, number] },
bounds: { minX: number; maxX: number; minZ: number; maxZ: number } | null,
epsilon = 0.01,
): boolean {
if (!bounds || !wall.start || !wall.end) return false
const onBound = (x: number, z: number): boolean =>
Math.abs(x - bounds.minX) <= epsilon ||
Math.abs(x - bounds.maxX) <= epsilon ||
Math.abs(z - bounds.minZ) <= epsilon ||
Math.abs(z - bounds.maxZ) <= epsilon
const [sx, sz] = wall.start
const [ex, ez] = wall.end
return onBound(sx, sz) || onBound(ex, ez)
}
function applyWallThickness(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
for (const node of Object.values(out.nodes)) {
if (node.type !== 'wall') continue
;(node as { thickness?: number }).thickness = pickFrom(rng, WALL_THICKNESS_OPTIONS)
}
return out
}
function applyWallHeight(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
for (const node of Object.values(out.nodes)) {
if (node.type !== 'wall') continue
;(node as { height?: number }).height = pickFrom(rng, WALL_HEIGHT_OPTIONS)
}
return out
}
function applyZoneLabels(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
const zoneNodes: Array<AnyNode & { name?: string }> = []
for (const node of Object.values(out.nodes)) {
if (node.type === 'zone') zoneNodes.push(node as AnyNode & { name?: string })
}
if (zoneNodes.length < 2) return out
const labels = zoneNodes.map((z) => z.name ?? '')
shuffleInPlace(labels, rng)
for (let i = 0; i < zoneNodes.length; i++) {
;(zoneNodes[i] as { name?: string }).name = labels[i]
}
return out
}
function applyRoomProportions(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
const bounds = siteBounds(out)
for (const node of Object.values(out.nodes)) {
if (node.type !== 'wall') continue
const wall = node as AnyNode & {
start?: [number, number]
end?: [number, number]
}
if (!wall.start || !wall.end) continue
if (isPerimeterWall(wall, bounds)) continue
// Nudge each endpoint by ±10% of its current value.
const nudge = (v: number): number => v * (1 + (rng() * 2 - 1) * 0.1)
const clampX = (v: number): number =>
bounds ? Math.min(bounds.maxX, Math.max(bounds.minX, v)) : v
const clampZ = (v: number): number =>
bounds ? Math.min(bounds.maxZ, Math.max(bounds.minZ, v)) : v
const [sx, sz] = wall.start
const [ex, ez] = wall.end
wall.start = [clampX(nudge(sx)), clampZ(nudge(sz))]
wall.end = [clampX(nudge(ex)), clampZ(nudge(ez))]
}
return out
}
function applyOpenPlan(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
const bounds = siteBounds(out)
const interiorWallIds: AnyNodeId[] = []
for (const [id, node] of Object.entries(out.nodes)) {
if (node.type !== 'wall') continue
if (isPerimeterWall(node as AnyNode, bounds)) continue
interiorWallIds.push(id as AnyNodeId)
}
if (interiorWallIds.length === 0) return out
const targetId = interiorWallIds[Math.floor(rng() * interiorWallIds.length)] as AnyNodeId
// Collect any openings attached to this wall so we can drop them too.
const attached: AnyNodeId[] = []
for (const [attId, node] of Object.entries(out.nodes)) {
if ((node as { wallId?: string }).wallId === targetId) attached.push(attId as AnyNodeId)
}
const removal = new Set<AnyNodeId>([targetId, ...attached])
// Drop from nodes.
for (const id of removal) delete out.nodes[id]
// Drop from rootNodeIds (unlikely for walls, but consistent).
out.rootNodeIds = out.rootNodeIds.filter((id) => !removal.has(id))
// Drop references from any parent's `children` array.
for (const parent of Object.values(out.nodes)) {
if (!('children' in parent) || !Array.isArray((parent as { children?: unknown[] }).children)) {
continue
}
const children = (parent as { children: unknown[] }).children
;(parent as { children: unknown[] }).children = children.filter((child) => {
if (typeof child === 'string') return !removal.has(child as AnyNodeId)
if (child && typeof child === 'object' && 'id' in (child as Record<string, unknown>)) {
return !removal.has((child as { id: AnyNodeId }).id)
}
return true
})
}
return out
}
function applyDoorPositions(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
// Group doors by their parent wall so we can space them out and skip collisions.
const doorsByWall = new Map<string, Array<AnyNode & { wallT?: number; wallId?: string }>>()
for (const node of Object.values(out.nodes)) {
if (node.type !== 'door') continue
const wallId = (node as { wallId?: string }).wallId
if (!wallId) continue
let list = doorsByWall.get(wallId)
if (!list) {
list = []
doorsByWall.set(wallId, list)
}
list.push(node as AnyNode & { wallT?: number; wallId?: string })
}
for (const [, doors] of doorsByWall) {
// Minimum separation along the parametric wall axis — rough keep-away to
// avoid obvious overlaps.
const minGap = 0.15
const usedTs: number[] = []
for (const door of doors) {
let attempts = 0
let t = 0.5
while (attempts < 8) {
t = 0.2 + rng() * 0.6 // [0.2, 0.8]
const collides = usedTs.some((u) => Math.abs(u - t) < minGap)
if (!collides) break
attempts++
}
// If we still collide after 8 attempts, skip this door (leave it alone).
if (usedTs.some((u) => Math.abs(u - t) < minGap)) continue
usedTs.push(t)
;(door as { wallT?: number }).wallT = t
}
}
return out
}
function applyFenceStyle(graph: SceneGraph, rng: Rng): SceneGraph {
const out = cloneGraph(graph)
let i = 0
for (const node of Object.values(out.nodes)) {
if (node.type !== 'fence') continue
// Use rng to choose a rotation offset so each call can produce a different
// starting point even when called multiple times with the same base.
const offset = Math.floor(rng() * FENCE_STYLES.length)
const style = FENCE_STYLES[(i + offset) % FENCE_STYLES.length]
;(node as { style?: string }).style = style
i++
}
return out
}
/** Pure: apply a single mutation and return a fresh graph. */
export function applyMutation(graph: SceneGraph, rng: Rng, kind: MutationKind): SceneGraph {
switch (kind) {
case 'wall-thickness':
return applyWallThickness(graph, rng)
case 'wall-height':
return applyWallHeight(graph, rng)
case 'zone-labels':
return applyZoneLabels(graph, rng)
case 'room-proportions':
return applyRoomProportions(graph, rng)
case 'open-plan':
return applyOpenPlan(graph, rng)
case 'door-positions':
return applyDoorPositions(graph, rng)
case 'fence-style':
return applyFenceStyle(graph, rng)
}
}
/**
* Human-readable summary of the mutations applied to a variant. Reads the
* interesting fields from the graph (e.g. first wall's thickness/height).
*/
export function describeVariant(graph: SceneGraph, mutations: readonly MutationKind[]): string {
const parts: string[] = []
if (mutations.includes('wall-thickness')) {
const t = firstWallField(graph, 'thickness')
if (t !== null) parts.push(`wall thickness ${t}m`)
}
if (mutations.includes('wall-height')) {
const h = firstWallField(graph, 'height')
if (h !== null) parts.push(`wall height ${h}m`)
}
if (mutations.includes('zone-labels')) {
const names: string[] = []
for (const node of Object.values(graph.nodes)) {
if (node.type === 'zone') names.push((node as { name?: string }).name ?? '')
}
if (names.length > 0) parts.push(`zones [${names.join(', ')}]`)
}
if (mutations.includes('room-proportions')) parts.push('room proportions nudged')
if (mutations.includes('open-plan')) parts.push('open-plan')
if (mutations.includes('door-positions')) parts.push('doors repositioned')
if (mutations.includes('fence-style')) {
const s = firstFenceField(graph, 'style')
if (s !== null) parts.push(`fence style ${s}`)
}
return parts.length > 0 ? parts.join(', ') : 'no-op'
}
function firstWallField(graph: SceneGraph, field: 'thickness' | 'height'): number | null {
for (const node of Object.values(graph.nodes)) {
if (node.type !== 'wall') continue
const v = (node as Record<string, unknown>)[field]
if (typeof v === 'number') return v
}
return null
}
function firstFenceField(graph: SceneGraph, field: 'style'): string | null {
for (const node of Object.values(graph.nodes)) {
if (node.type !== 'fence') continue
const v = (node as Record<string, unknown>)[field]
if (typeof v === 'string') return v
}
return null
}