Class Asset

Asset objects base class.

Asset
Asset
Asset
Assembly: FlaxEngine.dll
File: Engine/Content/Asset.h
Syntax
public class Asset : public ManagedScriptingObject

Constructors

Asset(const SpawnParams& params, const AssetInfo* info)

Initializes a new instance of the Asset class.

Declaration
public Asset(const SpawnParams& params, const AssetInfo* info)
Parameters
SpawnParams params

The object initialization parameters.
AssetInfo info

The asset object information.

DECLARE_ENUM_7(LoadResult, Ok, Failed, MissingDataChunk, CannotLoadData, CannotLoadStorage, CannotLoadInitData, InvalidData)

The asset loading result.

Declaration
public DECLARE_ENUM_7(LoadResult, Ok, Failed, MissingDataChunk, CannotLoadData, CannotLoadStorage, CannotLoadInitData, InvalidData)
Parameters
LoadResult Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

Ok Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

Failed Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

MissingDataChunk Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

CannotLoadData Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

CannotLoadStorage Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

CannotLoadInitData Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

InvalidData Asset_DECLARE_ENUM_7_LoadResult_Ok_Failed_MissingDataChunk_CannotLoadData_CannotLoadStorage_CannotLoadInitData_InvalidData_

DEPRECATED("Use GetReferences with assets and files parameter instead")

Gets the asset references. Supported only in Editor. [Deprecated in v1.9]

For some asset types (e.g. scene or prefab) it may contain invalid asset ids due to not perfect gather method, which is optimized to perform scan very quickly. Before using those ids perform simple validation via Content cache API. The result collection contains only 1-level-deep references (only direct ones) and is invalid if asset is not loaded. Also, the output data may have duplicated asset ids or even invalid ids (Guid::Empty).

Declaration
public DEPRECATED("Use GetReferences with assets and files parameter instead") virtual void GetReferences(Array<Guid
Parameters
"Use GetReferences with assets and files parameter instead" Asset_DEPRECATED__Use_GetReferences_with_assets_and_files_parameter_instead__

Fields

_deleteFileOnUnload

Declaration
protected int8 _deleteFileOnUnload
Field Value
int8

_isVirtual

Declaration
protected int8 _isVirtual
Field Value
int8

_loadingTask

Declaration
protected intptr _loadingTask
Field Value
intptr

_loadState

Declaration
protected int64 _loadState
Field Value
int64

_refCount

Declaration
protected int64 _refCount
Field Value
int64

_references

Declaration
protected HashSet<IAssetReference* > _references
Field Value
HashSet<IAssetReference >

_referencesLocker

Declaration
protected CriticalSection _referencesLocker
Field Value
CriticalSection

const

Declaration
public HeapAllocationoutput const
Field Value
HeapAllocationoutput

Locker

General purpose mutex for an asset object. Should guard most of the asset functionalities to be secure.

Declaration
public CriticalSection Locker
Field Value
CriticalSection

OnLoaded

Action called when asset gets loaded

Declaration
public EventType OnLoaded
Field Value
EventType

OnReloading

Action called when asset start reloading (e.g. after reimport). Always called from the main thread.

Declaration
public EventType OnReloading
Field Value
EventType

OnUnloaded

Action called when asset gets unloaded

Declaration
public EventType OnUnloaded
Field Value
EventType

Methods

AddReference()

Adds reference to that asset.

Declaration
public void AddReference()

AddReference(IAssetReference* ref, bool week=false)

Adds reference to that asset.

Declaration
public void AddReference(IAssetReference* ref, bool week=false)
Parameters
IAssetReference ref

bool week

CancelStreaming()

Cancels any asynchronous content streaming by this asset (eg. mesh data streaming into GPU memory). Will release any locks for asset storage container.

Declaration
public virtual void CancelStreaming()

ChangeID(const Guid& newId)

Changes the object id (both managed and unmanaged). Warning! Use with caution as object ID is what it identifies it and change might cause issues.

Declaration
public virtual void ChangeID(const Guid& newId) override
Parameters
Guid newId

The new ID.
Overrides

createLoadingTask()

Creates the loading tasks sequence (allows to inject custom tasks to asset loading logic).

Declaration
protected virtual ContentLoadTask* createLoadingTask()
Returns
ContentLoadTask

First task to call on start loading

CreateManaged()

Declaration
public virtual bool CreateManaged() override
Returns
bool

Overrides

DeleteManaged()

Deletes the managed object.

Declaration
public void DeleteManaged()

DestroyManaged()

Declaration
public virtual void DestroyManaged() override
Overrides

GetMemoryUsage()

Gets amount of CPU memory used by this resource (in bytes). It's a rough estimation. Memory may be fragmented, compressed or sub-allocated so the actual memory pressure from this resource may vary.

Declaration
public virtual uint64 GetMemoryUsage() const
Returns
uint64

GetPath()

Gets the path to the asset storage file. In Editor, it reflects the actual file, in cooked Game, it fakes the Editor path to be informative for developers.

Declaration
public virtual StringView GetPath() const = 0
Returns
StringView

GetReferences()

Gets the asset references. Supported only in Editor.

For some asset types (e.g. scene or prefab) it may contain invalid asset ids due to not perfect gather method, which is optimized to perform scan very quickly. Before using those ids perform simple validation via Content cache API. The result collection contains only 1-level-deep references (only direct ones) and is invalid if asset is not loaded. Also, the output data may have duplicated asset ids or even invalid ids (Guid::Empty).

Declaration
public Array<Guid, HeapAllocation> GetReferences() const
Returns
Array<Guid, HeapAllocation>

The collection of the asset ids referenced by this asset.

GetReferences(Array<Guid, HeapAllocation>& assets, Array<String, HeapAllocation>& files)

Gets the asset references. Supported only in Editor.

For some asset types (e.g. scene or prefab) it may contain invalid asset ids due to not perfect gather method, which is optimized to perform scan very quickly. Before using those ids perform simple validation via Content cache API. The result collection contains only 1-level-deep references (only direct ones) and is invalid if asset is not loaded. Also, the output data may have duplicated asset ids or even invalid ids (Guid::Empty).

Declaration
public virtual void GetReferences(Array<Guid, HeapAllocation>& assets, Array<String, HeapAllocation>& files) const
Parameters
Array<Guid, HeapAllocation> assets

The output collection of the asset ids referenced by this asset.
Array<String, HeapAllocation> files

The output list of file paths referenced by this asset. Files might come from project Content folder (relative path is preserved in cooked game), or external location (copied into Content root folder of cooked game).

GetReferencesCount()

Gets asset's reference count. Asset will be automatically unloaded when this reaches zero.

Declaration
public int32 GetReferencesCount() const
Returns
int32

GetTypeName()

Gets the asset type name.

Declaration
public virtual String GetTypeName() const = 0
Returns
String

InitAsVirtual()

Initializes asset data as virtual asset.

Declaration
public virtual void InitAsVirtual()

IsInternalType()

Declaration
protected virtual bool IsInternalType() const
Returns
bool

IsLoaded()

Returns true if asset is loaded, otherwise false.

Declaration
public bool IsLoaded() const
Returns
bool

IsVirtual()

Determines whether this asset is virtual (generated or temporary, has no storage so it won't be saved).

Declaration
public bool IsVirtual() const
Returns
bool

LastLoadFailed()

Returns true if last asset loading failed, otherwise false.

Declaration
public bool LastLoadFailed() const
Returns
bool

loadAsset()

Loads asset

Declaration
protected virtual LoadResult loadAsset() = 0
Returns
LoadResult

Loading result

OnCheckSave(const StringView& path=StringView::Empty)

Declaration
protected bool OnCheckSave(const StringView& path=StringView::Empty) const
Parameters
StringView path

Returns
bool

OnDeleteObject()

Deletes the object. Called by the ObjectsRemovalService. Can be overriden to provide custom logic per object (cleanup, etc.).

Declaration
public virtual void OnDeleteObject() override
Overrides

onLoad(LoadAssetTask* task)

Declaration
protected bool onLoad(LoadAssetTask* task)
Parameters
LoadAssetTask task

Returns
bool

onLoaded()

Declaration
protected void onLoaded()

onLoaded_MainThread()

Declaration
protected virtual void onLoaded_MainThread()

OnManagedInstanceDeleted()

Declaration
public virtual void OnManagedInstanceDeleted() override
Overrides

onRename(const StringView& newPath)

Declaration
protected virtual void onRename(const StringView& newPath) = 0
Parameters
StringView newPath

OnScriptingDispose()

Declaration
public virtual void OnScriptingDispose() override
Overrides

onUnload_MainThread()

Declaration
protected virtual void onUnload_MainThread()

releaseStorage()

Releases the storage file/container handle to prevent issues when renaming or moving the asset.

Declaration
protected virtual void releaseStorage()

Reload()

Reloads the asset.

Declaration
public void Reload()

RemoveReference()

Removes reference from that asset.

Declaration
public void RemoveReference()

RemoveReference(IAssetReference* ref, bool week=false)

Removes reference from that asset.

Declaration
public void RemoveReference(IAssetReference* ref, bool week=false)
Parameters
IAssetReference ref

bool week

Save(const StringView& path=StringView::Empty)

Saves this asset to the file. Supported only in Editor.

Declaration
public virtual bool Save(const StringView& path=StringView::Empty)
Parameters
StringView path

The custom asset path to use for the saving. Use empty value to save this asset to its own storage location. Can be used to duplicate asset. Must be specified when saving virtual asset.
Returns
bool

True when cannot save data, otherwise false.

ShouldDeleteFileOnUnload()

Determines whether this asset was marked to be deleted on unload.

Declaration
public bool ShouldDeleteFileOnUnload() const
Returns
bool

startLoading()

Starts the asset loading.

Declaration
protected virtual void startLoading()

ToString()

Gets the string representation of this object.

Declaration
public virtual String ToString() const override
Returns
String

Overrides

unload(bool isReloading)

Unloads asset data

Declaration
protected virtual void unload(bool isReloading) = 0
Parameters
bool isReloading

True if asset is reloading data, otherwise false.

WaitForLoaded(double timeoutInMilliseconds=30000.0)

Stops the current thread execution and waits until asset will be loaded (loading will fail, success or be cancelled).

Declaration
public bool WaitForLoaded(double timeoutInMilliseconds=30000.0) const
Parameters
double timeoutInMilliseconds

Custom timeout value in milliseconds.
Returns
bool

True if cannot load that asset (failed or has been cancelled), otherwise false.