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title: TimestampQueryPool category: Core layout: docs

TimestampQueryPool

Abstract base class of a timestamp query pool.

Constructor

new TimestampQueryPool( maxQueries : number ) (abstract)

Creates a new timestamp query pool.

maxQueries | Maximum number of queries this pool can hold. Default is 256.
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Properties

.currentQueryIndex : number

How many queries allocated so far.

Default is 0.

.frames : Array.<number>

Stores all timestamp frames.

.isDisposed : boolean

Whether the pool has been disposed or not.

Default is false.

.lastValue : number

TODO

Default is 0.

.maxQueries : number

Maximum number of queries this pool can hold.

Default is 256.

.pendingResolve : boolean

TODO

Default is false.

.queryOffsets : Map.<string, number>

Tracks offsets for different contexts.

.timestamps : Map.<string, number>

Stores the latest timestamp for each render context.

.trackTimestamp : boolean

Whether to track timestamps or not.

Default is true.

Methods

.allocateQueriesForContext( uid : string, frameId : number ) : number (abstract)

Allocate queries for a specific uid.

uid | A unique identifier for the render context.
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frameId | The current frame identifier.

.dispose() (abstract)

Dispose of the query pool.

.getTimestamp( uid : string ) : number

Returns the timestamp for a given render context.

uid | A unique identifier for the render context.
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Returns: The timestamp, or undefined if not available.

.getTimestampFrames() : Array.<number>

Returns all timestamp frames.

Returns: The timestamp frames.

.hasTimestamp( uid : string ) : boolean

Returns whether a timestamp is available for a given render context.

uid | A unique identifier for the render context.
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Returns: True if a timestamp is available, false otherwise.

.resolveQueriesAsync() : Promise.<number> | number (async, abstract)

Resolve all timestamps and return data (or process them).

Returns: The resolved timestamp value.

Source

src/renderers/common/TimestampQueryPool.js