Class Map<UserData>

A map is an Entity3D that represents a flat surface displaying one or more Layer.

If an elevation layer is added, the surface of the map is deformed to display terrain.

Type Parameters

Hierarchy

Implements

Constructors

  • Constructs a Map object.

    Type Parameters

    Parameters

    • id: string

      The unique identifier of the map.

    • options: {
          backgroundColor?: string;
          backgroundOpacity?: number;
          colorimetry?: ColorimetryOptions;
          contourLines?: boolean | ContourLineOptions;
          discardNoData?: boolean;
          doubleSided?: boolean;
          elevationRange?: ElevationRange;
          extent: Extent;
          forceTextureAtlases?: boolean;
          graticule?: boolean | default;
          hillshading?: boolean | default;
          maxSubdivisionLevel?: number;
          object3d?: Object3D<Object3DEventMap>;
          segments?: number;
          showOutline?: boolean;
          terrain?: boolean | TerrainOptions;
      }

      Constructor options.

      • Optional backgroundColor?: string
      • Optional backgroundOpacity?: number
      • Optional colorimetry?: ColorimetryOptions
      • Optional contourLines?: boolean | ContourLineOptions
      • Optional discardNoData?: boolean
      • Optional doubleSided?: boolean
      • Optional elevationRange?: ElevationRange
      • extent: Extent
      • Optional forceTextureAtlases?: boolean

        Force using texture atlases even when not required.

      • Optional graticule?: boolean | default
      • Optional hillshading?: boolean | default
      • Optional maxSubdivisionLevel?: number
      • Optional object3d?: Object3D<Object3DEventMap>
      • Optional segments?: number
      • Optional showOutline?: boolean
      • Optional terrain?: boolean | TerrainOptions

    Returns Map<UserData>

Properties

_atlasInfo: AtlasInfo
_colorAtlasDataType: TextureDataType = UnsignedByteType
_distance: {
    max: number;
    min: number;
}

Type declaration

  • max: number
  • min: number
_hasElevationLayer: boolean = false
_imageSize: Vector2
_instance: Instance
_layerIds: Set<string> = ...
_layerIndices: Map<string, number>
_layers: Layer<LayerEvents, LayerUserData>[] = []
_segments: number
_subdivisions: {
    x: number;
    y: number;
}

Type declaration

  • x: number
  • y: number
extent: Extent
geometryPool: Map<string, TileGeometry>
hasLayers: true = true

Read-only flag to check if a given object is of type HasLayers.

isEntity: boolean = true

Read-only flag to check if a given object is of type Entity.

isEntity3D: boolean = true

Read-only flag to check if a given object is of type Entity3D.

isMap: boolean = true

Read-only flag to check if a given object is of type Map.

isPickable: true = true
isPickableFeatures: true = true
materialOptions: MaterialOptions
maxSubdivisionLevel: number
onTileCreated: ((map, parent, tile) => void)

Type declaration

    • (map, parent, tile): void
    • Parameters

      • map: Map<UserData>
      • parent: TileMesh
      • tile: TileMesh

      Returns void

ready?: boolean
showOutline: boolean
subdivisionThreshold: number

The global factor that drives SSE (screen space error) computation. The lower this value, the sooner a tile is subdivided. Note: changing this scale to a value less than 1 can drastically increase the number of tiles displayed in the scene, and can even lead to WebGL crashes.

Default Value

1.5

type: string

The name of the type of this object.

userData: UserData

An object that can be used to store custom data about the Entity.

whenReady?: Promise<Map<UserData>>
wireframe: boolean

Displays the map tiles in wireframe.

Accessors

  • get clippingPlanes(): Plane[]
  • Gets or sets the clipping planes set on this entity. Default is null (no clipping planes).

    Note: custom entities must ensure that the materials and shaders used do support the clipping plane feature of three.js. Refer to the three.js documentation for more information.

    Returns Plane[]

  • set clippingPlanes(planes): void
  • Parameters

    • planes: Plane[]

    Returns void

  • get distance(): {
        max: number;
        min: number;
    }
  • Returns {
        max: number;
        min: number;
    }

    • max: number
    • min: number
  • get frozen(): boolean
  • Gets or sets the frozen status of this entity. A frozen entity is still visible but will not be updated automatically.

    Useful for debugging purposes.

    Returns boolean

  • set frozen(v): void
  • Parameters

    • v: boolean

    Returns void

  • get id(): string
  • Gets the unique identifier of this entity.

    Returns string

  • get imageSize(): Vector2
  • Returns Vector2

  • get layerCount(): number
  • Returns the number of layers currently in this object.

    Returns number

  • get loading(): boolean
  • Returns true if this map is currently processing data.

    Returns boolean

  • get object3d(): Object3D<Object3DEventMap>
  • Returns the root object of this entity.

    Returns Object3D<Object3DEventMap>

  • get opacity(): number
  • Gets or sets the opacity of this entity.

    Returns number

  • set opacity(v): void
  • Parameters

    • v: number

    Returns void

  • get progress(): number
  • Gets the loading progress (between 0 and 1) of the map. This is the average progress of all layers in this map. Note: if no layer is present, this will always be 1. Note: This value is only meaningful is loading is true.

    Returns number

  • get renderOrder(): number
  • Gets or sets the render order of this entity.

    Returns number

  • set renderOrder(v): void
  • Parameters

    • v: number

    Returns void

  • get segments(): number
  • Returns number

  • set segments(v): void
  • Parameters

    • v: number

    Returns void

  • get subdivisions(): {
        x: number;
        y: number;
    }
  • Returns {
        x: number;
        y: number;
    }

    • x: number
    • y: number
  • get visible(): boolean
  • Gets or sets the visibility of this entity. A non-visible entity will not be automatically updated.

    Returns boolean

  • set visible(v): void
  • Parameters

    • v: boolean

    Returns void

Methods

  • Returns void

  • Adds a listener to an event type.

    Type Parameters

    • T extends "frozen-property-changed" | "opacity-property-changed" | "visible-property-changed" | "clippingPlanes-property-changed" | "renderOrder-property-changed" | "layer-order-changed" | "layer-added" | "layer-removed"

    Parameters

    Returns void

  • Type Parameters

    • T extends string

    Parameters

    • type: T
    • listener: EventListener<{}, T, Map<UserData>>

    Returns void

  • Adds a layer, then returns the created layer. Before using this method, make sure that the map is added in an instance. If the extent or the projection of the layer is not provided, those values will be inherited from the map.

    Type Parameters

    Parameters

    • layer: TLayer

      the layer to add

    Returns Promise<TLayer>

    a promise resolving when the layer is ready

  • Parameters

    • node: TileMesh

      The node to subdivide.

    Returns boolean

    True if the node can be subdivided.

  • Returns void

  • Test whether this entity contains the given object.

    The object may be a component of the entity, or a 3D object.

    Parameters

    • obj: unknown

      The object to test.

    Returns boolean

    true if the entity contains the object.

  • Fire an event type.

    Type Parameters

    • T extends "frozen-property-changed" | "opacity-property-changed" | "visible-property-changed" | "clippingPlanes-property-changed" | "renderOrder-property-changed" | "layer-order-changed" | "layer-added" | "layer-removed"

    Parameters

    Returns void

  • Disposes this map and associated unmanaged resources.

    Note: By default, layers in this map are not automatically disposed, except when disposeLayers is true.

    Parameters

    • options: {
          disposeLayers?: boolean;
      } = ...

      Options.

      • Optional disposeLayers?: boolean

    Returns void

  • Parameters

    • tile: TileMesh

    Returns void

  • Filters what objects need to be updated, based on updatedSources. The returned objects are then passed to preUpdate and postUpdate.

    Inherited classes should override shouldFullUpdate and shouldUpdate if they need to change this behavior.

    Parameters

    • updateSources: Set<unknown>

      Sources that triggered an update

    Returns Set<unknown>

    Set of objects to update

  • Applies the callback to each layer in the object.

    Parameters

    Returns void

  • Returns an approximated bounding box of this entity in the scene.

    Returns Box3

    the resulting bounding box, or null if it could not be computed.

  • Returns the minimal and maximal elevation values in this map, in meters.

    If there is no elevation layer present, returns { min: 0, max: 0 }.

    Returns ElevationRange

    The min/max value.

  • Returns the position of the layer in the layer list.

    Parameters

    Returns number

    The index of the layer.

  • Attached layers expect to receive the visual representation of a layer (= THREE object with a material). So if a layer's update function don't process this kind of object, the layer must provide a getObjectToUpdateForAttachedLayers function that returns the correct object to update for attached layer from the objects returned by preUpdate.

    Parameters

    • obj: any

      the Mesh or the object containing a Mesh. These are the objects returned by preUpdate or update.

    Returns ObjectToUpdate

    an object passed to the update function of attached layers.

  • Checks if listener is added to an event type.

    Type Parameters

    • T extends "frozen-property-changed" | "opacity-property-changed" | "visible-property-changed" | "clippingPlanes-property-changed" | "renderOrder-property-changed" | "layer-order-changed" | "layer-added" | "layer-removed"

    Parameters

    Returns boolean

  • Type Parameters

    • T extends string

    Parameters

    • type: T
    • listener: EventListener<{}, T, Map<UserData>>

    Returns boolean

  • Moves the specified layer after the other layer in the list.

    Parameters

    Returns void

    Throws

    If the layer is not present in the map.

    Example

    map.addLayer(foo);
    map.addLayer(bar);
    map.addLayer(baz);
    // Layers (back to front) : foo, bar, baz

    map.insertLayerAfter(foo, baz);
    // Layers (back to front) : bar, baz, foo
  • Returns true if this object belongs to this entity.

    Parameters

    • obj: unknown

      The object to test.

    Returns boolean

  • Moves the layer closer to the background.

    Note: this only applies to color layers.

    Parameters

    Returns void

    Throws

    If the layer is not present in the map.

    Example

    map.addLayer(foo);
    map.addLayer(bar);
    map.addLayer(baz);
    // Layers (back to front) : foo, bar, baz

    map.moveLayerDown(baz);
    // Layers (back to front) : foo, baz, bar
  • Moves the layer closer to the foreground.

    Note: this only applies to color layers.

    Parameters

    Returns void

    Throws

    If the layer is not present in the map.

    Example

    map.addLayer(foo);
    map.addLayer(bar);
    map.addLayer(baz);
    // Layers (back to front) : foo, bar, baz

    map.moveLayerUp(foo);
    // Layers (back to front) : bar, foo, baz
  • Applies entity-level setup on a new object.

    Note: this method should be called from the subclassed entity to notify the parent class that a new 3D object has just been created, so that it can be setup with entity-wide parameters.

    Parameters

    • obj: Object3D<Object3DEventMap>

      The object to prepare.

    Returns void

    Example

    // In the subclass
    const obj = new Object3D();

    // Notify the parent class
    this.onObjectCreated(obj);
  • Picks objects from this entity.

    Implementations must respect at least limit and filter options.

    Parameters

    • coordinates: Vector2

      Coordinates on the rendering canvas

    • Optional options: PickOptions

      Options

    Returns MapPickResult<unknown>[]

    Target

  • Given a PickResult, returns and assigns its features.

    Implementations must set pickedResult.features to the returned result.

    Parameters

    Returns unknown[]

    Features

  • Method called after update.

    Returns void

  • This method is called just before update() to filter and select which elements should be actually updated. For example, in the case of complex entities made of a hierarchy of elements, the entire hierarchy may not need to be updated.

    Use this method to optimize the update step by reducing the number of elements to process.

    Note: if this functions returns nothing, update() will not be called.

    Parameters

    • context: Context

      the update context.

    • changeSources: Set<unknown>

      the objects that triggered an update step. This is useful to filter out unnecessary updates if no sources are relevant to this entity. For example, if one of the sources is a camera that moved during the previous frame, any entity that depends on the camera's field of view should be updated.

    Returns TileMesh[]

    the elements to update during update().

  • Asynchronously preprocess the entity. This method may be overriden to perform any operation that must be done before the entity can be used in the scene, such as fetching metadata about a dataset, etc.

    Returns Promise<void>

    A promise that resolves when the entity is ready to be used.

  • Parameters

    Returns void

  • Parameters

    Returns void

  • Removes a listener from an event type.

    Type Parameters

    • T extends "frozen-property-changed" | "opacity-property-changed" | "visible-property-changed" | "clippingPlanes-property-changed" | "renderOrder-property-changed" | "layer-order-changed" | "layer-added" | "layer-removed"

    Parameters

    Returns void

  • Type Parameters

    • T extends string

    Parameters

    • type: T
    • listener: EventListener<{}, T, Map<UserData>>

    Returns void

  • Removes a layer from the map.

    Parameters

    • layer: Layer<LayerEvents, LayerUserData>

      the layer to remove

    • options: {
          disposeLayer?: boolean;
      } = {}

      The options.

      • Optional disposeLayer?: boolean

        If true, the layer is also disposed.

    Returns boolean

    true if the layer was present, false otherwise.

  • Returns void

  • Parameters

    • extent: Extent
    • parent: TileMesh
    • level: number
    • x: number = 0
    • y: number = 0

    Returns TileMesh

  • Sets the render state of the map.

    Parameters

    • state: RenderingState

      The new state.

    Returns (() => void)

    The function to revert to the previous state.

      • (): void
      • Returns void

  • This method is called before update to check if the MainLoop should try to update this entity or not. For better performances, it should return false if the entity has no impact on the rendering (e.g. the element is not visible).

    The inherited child can completely ignore this value if it makes sense.

    Returns boolean

    true if should check for update

  • This method is called at the beginning of the update step to determine if we should do a full render of the object. This should be the case if, for instance, the source is the camera.

    You can override this depending on your needs. The inherited child should not ignore this value, it should do a boolean OR, e.g.: return super.shouldFullUpdate(updateSource) || this.contains(updateSource);

    Parameters

    • updateSource: unknown

      Source of change

    Returns boolean

    true if requires a full update of this object

  • This method is called at the beginning of the update step to determine if we should re-render updateSource. Not used when shouldFullUpdate returns true.

    You can override this depending on your needs. The inherited child should not ignore this value, it should do a boolean OR, e.g.: return super.shouldUpdate(updateSource) || this.contains(updateSource);

    Parameters

    • updateSource: unknown

      Source of change

    Returns boolean

    true if requires an update of updateSource

  • Sort the color layers according to the comparator function.

    Parameters

    Returns void

  • Parameters

    Returns void

  • Parameters

    • tile: TileMesh
    • sse: SSE

    Returns boolean

  • Parameters

    Returns boolean

  • Traverses all objects in the hierarchy of this entity.

    Parameters

    • callback: ((arg0) => void)

      The callback.

        • (arg0): void
        • Parameters

          • arg0: Object3D<Object3DEventMap>

          Returns void

    • root: Object3D<Object3DEventMap> = undefined

      The traversal root. If undefined, the traversal starts at the root object of this entity.

    Returns void

  • Traverses all materials in the hierarchy of this entity.

    Parameters

    • callback: ((arg0) => void)

      The callback.

        • (arg0): void
        • Parameters

          • arg0: Material

          Returns void

    • root: Object3D<Object3DEventMap> = undefined

      The traversal root. If undefined, the traversal starts at the root object of this entity.

    Returns void

  • Traverses all meshes in the hierarchy of this entity.

    Parameters

    • callback: ((arg0) => void)

      The callback.

        • (arg0): void
        • Parameters

          • arg0: Mesh<BufferGeometry<NormalBufferAttributes>, Material | Material[], Object3DEventMap>

          Returns void

    • root: Object3D<Object3DEventMap> = undefined

      The raversal root. If undefined, the traversal starts at the root object of this entity.

    Returns void

  • Traverses all tiles in the hierarchy of this entity.

    Parameters

    • callback: ((arg0) => void)

      The callback.

        • (arg0): void
        • Parameters

          • arg0: TileMesh

          Returns void

    • root: Object3D<Object3DEventMap> = undefined

      The raversal root. If undefined, the traversal starts at the root object of this entity.

    Returns void

  • Performs an update on an element of the entity.

    Note: this method will be called for each element returned by preUpdate().

    Parameters

    • context: Context

      the update context. This is the same object that the entity whose update() is being called.

    • node: TileMesh

      the element to update. This is one of the elements returned by preUpdate.

    Returns unknown[]

    New elements to update

  • Updates the clipping planes of all objects under this entity.

    Returns void

  • Returns void

  • Parameters

    Returns void

  • Updates the opacity of the entity. Note: this method can be overriden for custom implementations.

    Returns void

  • Updates the visibility of the entity. Note: this method can be overriden for custom implementations.

    Returns void

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