Documentation / scene / AssetManager

Class: AssetManager

Defined in: libs/scene/src/asset/assetmanager.ts:192

Centralized asset manager for loading and caching resources.

Responsibilities:

• Abstracts resource loading via VFS (text/json/binary).
• Dispatches texture/model loading to registered loaders by MIME type.
• Caches results and uses weak references to allow GPU resources to be GC'd when unused.
• Harmonizes cross-backend constraints (e.g., WebGL non-power-of-two rules and sRGB handling).
• Provides access to built-in textures with device-restore handlers.

Threading/async model:

• All I/O is async; repeated calls are coalesced via internal promise caches keyed by URL or hash.

Constructors

Constructor

new AssetManager(resourceManager?): AssetManager

Defined in: libs/scene/src/asset/assetmanager.ts:257

Creates an instance of AssetManager

Parameters

resourceManager?

ResourceManager

Returns

AssetManager

Accessors

vfs

Get Signature

get vfs(): VFS

Defined in: libs/scene/src/asset/assetmanager.ts:273

VFS used to read resources (files, URLs, virtual mounts).

Returns

VFS

Methods

clearCache()

clearCache(): void

Defined in: libs/scene/src/asset/assetmanager.ts:284

Clear cached references and promises.

• Disposes any DWeakRef holders maintained by this manager.
• Empties internal maps for textures, models, and raw data (text/json/binary).
• Does not forcibly dispose GPU resources; it only clears references so they can be GC'd if no other owners are holding them.

Returns

void

---

releaseFontAsset()

releaseFontAsset(url): boolean

Defined in: libs/scene/src/asset/assetmanager.ts:333

Removes a cached font asset entry by URL.

This only evicts the cache entry. It does not dispose any external references to the FontAsset.

Parameters

url

string

Resource URL or VFS path.

Returns

boolean

true if a cache entry existed and was removed.

---

addTextureLoader()

static addTextureLoader(loader): void

Defined in: libs/scene/src/asset/assetmanager.ts:347

Register a texture loader (highest priority first).

Note: This is a static registry shared by all AssetManager instances.

Parameters

loader

AbstractTextureLoader

A concrete texture loader implementation.

Returns

void

---

setModelLoader()

setModelLoader(mimeType, loader): void

Defined in: libs/scene/src/asset/assetmanager.ts:355

Register a model loader (highest priority first).

Parameters

mimeType

string

loader

ModelLoader

Returns

void

---

fetchTextData()

fetchTextData(url, postProcess?, httpRequest?, options?): Promise<string>

Defined in: libs/scene/src/asset/assetmanager.ts:372

Fetch a UTF-8 text resource via VFS.

• Results are cached per resolved URL (via HttpRequest.urlResolver if provided; otherwise the raw URL).
• If cached, any provided postProcess is ignored for subsequent calls; create a separate AssetManager if you need different post-processing of the same URL.

Parameters

url

string

Resource URL or VFS path.

postProcess?

(text) => string

Optional transformation applied to the loaded text.

httpRequest?

HttpRequest

Optional HttpRequest for custom URL resolution/headers.

options?

BaseFetchOptions

Returns

Promise<string>

A promise that resolves to the loaded (and optionally processed) text.

---

fetchJsonData()

fetchJsonData<T>(url, postProcess?, httpRequest?, options?): Promise<T>

Defined in: libs/scene/src/asset/assetmanager.ts:397

Fetch a JSON resource via VFS.

• Parses as JSON after text load.
• Cached per resolved URL. Post-process is applied only on the first load for a given cache key.

Type Parameters

T

T = any

Parameters

url

string

Resource URL or VFS path.

postProcess?

(json) => T

Optional transformation applied to the parsed JSON object.

httpRequest?

HttpRequest

Optional HttpRequest for custom URL resolution/headers.

options?

BaseFetchOptions

Returns

Promise<T>

A promise that resolves to the loaded (and optionally processed) JSON value.

---

fetchBinaryData()

fetchBinaryData(url, postProcess?, httpRequest?, options?): Promise<ArrayBuffer>

Defined in: libs/scene/src/asset/assetmanager.ts:421

Fetch a binary resource via VFS.

• Cached per resolved URL. Post-process is applied only on first load for a given key.

Parameters

url

string

Resource URL or VFS path.

postProcess?

(data) => ArrayBuffer

Optional transformation applied to the loaded ArrayBuffer.

httpRequest?

HttpRequest

Optional HttpRequest for custom URL resolution/headers.

options?

BaseFetchOptions

Returns

Promise<ArrayBuffer>

A promise that resolves to the loaded (and optionally processed) ArrayBuffer.

---

fetchFontAsset()

fetchFontAsset(url, options?): Promise<FontAsset>

Defined in: libs/scene/src/asset/assetmanager.ts:446

Fetch a font asset via VFS.

• Cached per URL only.
• options are applied only when the font is first loaded for that URL.
• If the URL is already cached, later calls ignore options and reuse the cached FontAsset.

Parameters

url

string

Resource URL or VFS path.

options?

FontAssetFetchOptions

Optional MSDF atlas settings bound to the loaded FontAsset.

Returns

Promise<FontAsset>

A promise that resolves to the loaded (and optionally processed) font asset.

---

getFontAsset()

getFontAsset(url): FontAsset

Defined in: libs/scene/src/asset/assetmanager.ts:470

Fetch a font asset via VFS if already cached.

Parameters

url

string

Resource URL or VFS path.

Returns

FontAsset

The cached FontAsset if it exists and is loaded, or null if not cached or still loading.

---

fetchBluePrint()

fetchBluePrint(url, options?): Promise<Record<string, MaterialBlueprintIR>>

Defined in: libs/scene/src/asset/assetmanager.ts:474

Parameters

url

string

options?

BaseFetchOptions

Returns

Promise<Record<string, MaterialBlueprintIR>>

---

fetchMaterial()

fetchMaterial<T>(url, options?): Promise<T>

Defined in: libs/scene/src/asset/assetmanager.ts:490

Fetch a material resource.

Type Parameters

T

T extends Material = Material

Expected concrete material type.

Parameters

url

string

Resource URL or VFS path.

options?

BaseFetchOptions

Returns

Promise<T>

A promise that resolves to the loaded material.

---

fetchPrimitive()

fetchPrimitive<T>(url, options?): Promise<T>

Defined in: libs/scene/src/asset/assetmanager.ts:515

Fetch a primitive resource.

Type Parameters

T

T extends Primitive = Primitive

Expected concrete primitive type.

Parameters

url

string

Resource URL or VFS path.

options?

BaseFetchOptions

Returns

Promise<T>

A promise that resolves to the loaded primitive.

---

fetchTexture()

fetchTexture<T>(url, options?): Promise<T>

Defined in: libs/scene/src/asset/assetmanager.ts:547

Fetch a texture resource via registered loaders.

• Chooses loader by explicit MIME type or by VFS file extension inference.
• Deduplicates in-flight requests and caches ready textures.
• If options.texture is provided, the asset will be uploaded/blitted into that texture.
• On WebGL backends, enforces constraints by repacking non-power-of-two or sRGB textures.

Type Parameters

T

T extends BaseTexture<unknown>

Expected concrete texture type.

Parameters

url

string

Resource URL or VFS path.

options?

TextureFetchOptions<T>

Texture fetching options (color space, sampler, target texture).

Returns

Promise<T>

A promise that resolves to the loaded texture.

---

loadPrimitive()

loadPrimitive<T>(url, vfs?): Promise<T>

Defined in: libs/scene/src/asset/assetmanager.ts:710

Type Parameters

T

T extends Primitive = Primitive

Parameters

url

string

vfs?

VFS

Returns

Promise<T>

---

reloadBluePrintMaterials()

reloadBluePrintMaterials(filter?): Promise<void>

Defined in: libs/scene/src/asset/assetmanager.ts:772

Parameters

filter?

(m) => boolean

Returns

Promise<void>

---

createBluePrintDAG()

createBluePrintDAG(nodeMap, roots, links): object

Defined in: libs/scene/src/asset/assetmanager.ts:1043

Parameters

nodeMap

Record<number, IGraphNode>

roots

number[]

links

object[]

Returns

object

graph

graph: GraphStructure = gs

nodeMap

nodeMap: Record<number, IGraphNode>

roots

roots: number[]

order

order: number[]

---

invalidateBluePrint()

invalidateBluePrint(path): void

Defined in: libs/scene/src/asset/assetmanager.ts:1064

Parameters

path

string

Returns

void

---

loadBluePrint()

loadBluePrint(path, vfs?): Promise<Record<string, MaterialBlueprintIR>>

Defined in: libs/scene/src/asset/assetmanager.ts:1067

Parameters

path

string

vfs?

VFS

Returns

Promise<Record<string, MaterialBlueprintIR>>

---

loadTextureFromBuffer()

loadTextureFromBuffer<T>(arrayBuffer, mimeType, srgb?, samplerOptions?, texture?): Promise<T>

Defined in: libs/scene/src/asset/assetmanager.ts:1115

Load a texture directly from an ArrayBuffer or typed array.

• Chooses an appropriate loader based on the provided MIME type.
• Can upload into an existing texture if texture is specified.

Type Parameters

T

T extends BaseTexture<unknown>

Expected concrete texture type.

Parameters

arrayBuffer

ArrayBuffer | TypedArray

Raw texture data buffer.

mimeType

string

MIME type of the texture (must be supported by a registered loader).

srgb?

boolean

If true, treat image as sRGB; otherwise linear.

samplerOptions?

SamplerOptions

Optional sampler options passed to the loader path.

texture?

BaseTexture

Optional destination texture to populate.

Returns

Promise<T>

A promise that resolves to the created or populated texture.

---

fetchBuiltinTexture()

fetchBuiltinTexture<T>(name, texture?): T

Defined in: libs/scene/src/asset/assetmanager.ts:1284

Fetch a built-in texture synchronously by name.

• If this built-in was not created yet, the registered loader is invoked.
• Registers a device restore handler so the texture can be re-initialized after device loss.
• If an existing texture is provided, the loader uploads into it.

Type Parameters

T

T extends BaseTexture<unknown>

Expected concrete texture type.

Parameters

name

string

Built-in texture identifier.

texture?

T

Optional destination texture to populate.

Returns

T

The built-in texture (created or populated).

---

setBuiltinTextureLoader()

static setBuiltinTextureLoader(name, loader): void

Defined in: libs/scene/src/asset/assetmanager.ts:1312

Override or unregister the loader for a named built-in texture.

• Passing a valid loader function sets/overrides the creation path.
• Passing undefined removes the loader mapping for the given name.

Parameters

name

string

Built-in texture identifier.

loader

(assetManager) => BaseTexture

Factory that creates the built-in texture using the provided AssetManager.

Returns

void

---

writeFileToVFSs()

writeFileToVFSs(path, data, options, vfs?): Promise<void>

Defined in: libs/scene/src/asset/assetmanager.ts:1355

Write file to a VFS

Parameters

path

string

File path

data

string | ArrayBuffer

Data to write

options

WriteOptions

Write options

vfs?

VFS

VFS to write to

Returns

Promise<void>