ObjectSymbol3DLayer | API Reference | ArcGIS Maps SDK for JavaScript 4.30

ObjectSymbol3DLayer is used to render Point geometries using a volumetric 3D shape (e.g., a sphere or cylinder) with a PointSymbol3D in a SceneView. MapView does not support 3D symbols. Polygon features may also be rendered with ObjectSymbol3DLayers, but the object symbol layer must be contained in a PolygonSymbol3D, not a PointSymbol3D in this scenario.

The shape of the object is set in the resource property and the color of the object is set in the material property. The size of the object is always defined in meters. Size can be directly set in the height, width, and depth properties. Object color and size can also be data-driven by adding size and/or color visual variables to any Renderer that uses this symbol layer.

ObjectSymbol3DLayers must be added to the symbolLayers property of either PointSymbol3D or PolygonSymbol3D symbols. Multiple symbol layers may be used in a single symbol. The image below depicts a point FeatureLayer whose features are symbolized with a PointSymbol3D containing a cylinder-based ObjectSymbol3DLayer.

See Symbol3DLayer and Symbol3D to read more general information about 3D symbols, symbol layers and how they relate to one another.

See also

Examples

// symbol using a cylinder as a resource
const symbol = {
  type: "point-3d",  // autocasts as new PointSymbol3D()
  symbolLayers: [{
    type: "object",  // autocasts as new ObjectSymbol3DLayer()
    width: 5,  // diameter of the object from east to west in meters
    height: 20,  // height of the object in meters
    depth: 15,  // diameter of the object from north to south in meters
    resource: { primitive: "cylinder" },
    material: { color: "red" }
  }]
};

// symbol using a glTF 3D model as a resource
const symbol = {
  type: "point-3d",  // autocasts as new PointSymbol3D()
  symbolLayers: [{
    type: "object",  // autocasts as new ObjectSymbol3DLayer()
    resource: {
      href: "../3d-assets/model.gltf"
    },
    height: 3,
    material: {
      color: "red"
    }
  }
};

Constructors

ObjectSymbol3DLayer Constructor new ObjectSymbol3DLayer(properties)

Parameter

properties Object

optional

See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.

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Type	Summary	Class
String	The positioning of the symbol relative to the geometry.	ObjectSymbol3DLayer
Object	Defines the anchor relative to the center of the symbol layer resource.	ObjectSymbol3DLayer
Boolean	Indicates whether the symbol layer geometry casts shadows in the scene.	ObjectSymbol3DLayer
String	The name of the class.	Accessor
Number	The depth, or diameter from north to south, of the object in meters.	ObjectSymbol3DLayer
Number	The clockwise rotation of the symbol in the horizontal plane (i.e., around the z axis).	ObjectSymbol3DLayer
Number	The height of the object in meters.	ObjectSymbol3DLayer
Object	The material used to shade the object.	ObjectSymbol3DLayer
Object	The primitive shape (`primitive`) or external 3D model (`href`) used to visualize the points.	ObjectSymbol3DLayer
Number	The rotation of the symbol in the lateral vertical plane (i.e., around the y axis).	ObjectSymbol3DLayer
Number	The rotation of the symbol in the longitudinal vertical plane (i.e., around the x axis).	ObjectSymbol3DLayer
String	The object type.	ObjectSymbol3DLayer
Number	The width, or diameter from east to west, of the object in meters.	ObjectSymbol3DLayer

Property Details

anchor Property anchor String

The positioning of the symbol relative to the geometry. The default behavior (origin) depends on the resource:

For sphere, cube and diamond primitives, the origin is at the center.
For cylinder, cone, inverted-cone and tetrahedron primitives, the origin is at the bottom.
For href resources, the origin coincides with the origin of the 3D model.

If anchor is set to relative, the anchor is defined by anchorPosition as a fraction of the symbol's bounding box.

Possible Values:"center" |"top" |"bottom" |"origin" |"relative"

Default Value:origin

anchorPosition Property anchorPosition Object Since: ArcGIS Maps SDK for JavaScript 4.10 ObjectSymbol3DLayer since 4.0, anchorPosition added at 4.10.

Defines the anchor relative to the center of the symbol layer resource. It is specified as a ratio of the resource's bounding box dimensions. For example, a value of { x: 0, y: 0, z: 0 } designates the center, while a value of { x: -0.5, y: -0.5, z: -0.5 } places the symbol at the lower south-west corner of the symbol's bounding box.

This property only applies when anchor is set to relative.

Properties: x Number

Value defining the position relative to the x axis of the bounding box.

y Number

Value defining the position relative to the y axis of the bounding box.

z Number

Value defining the position relative to the z axis of the bounding box.

Examples

symbolLayer.anchor = "relative";
symbolLayer.anchorPosition = { x: 0, y: 0, z: -0.5 }; // equivalent to `anchor: "bottom"`

symbolLayer.anchor = "relative";
symbolLayer.anchorPosition = { x: 1.5, y: 1, z: 0 }; // the anchor can be placed outside of the symbol's bounding box

castShadows Property castShadows Boolean Since: ArcGIS Maps SDK for JavaScript 4.11 ObjectSymbol3DLayer since 4.0, castShadows added at 4.11.

Indicates whether the symbol layer geometry casts shadows in the scene. Setting this property to false will disable shadows for the symbol layer even if direct shadows are enabled in SceneView.environment.

Default Value:true

Example

// disables shadow casting
symbolLayer.castShadows = false;

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.7 Accessor since 4.0, declaredClass added at 4.7.

The name of the class. The declared class name is formatted as esri.folder.className.

depth Property depth Number

The depth, or diameter from north to south, of the object in meters. If undefined, the depth will be calculated to maintain the original proportions of the object.

Default Value:10

Example

// depth of the symbol in meters
symbolLayer.depth = 5000;

heading Property heading Number

The clockwise rotation of the symbol in the horizontal plane (i.e., around the z axis). The rotation is specified in degrees and is relative to the y-axis.

If the symbol resource is aligned such that its forward facing side points in the direction of the y-axis (the y-axis always points North in WGS84 or WebMercator coordinates), its upwards facing side is pointing in the direction of the z-axis, and its right-hand side points in the direction of the x-axis (the x-axis always points East in WGS84 or WebMercator coordinates), then this angle corresponds to the heading of the symbol.

Example

// heading of the symbol in degrees
symbolLayer.heading = 180;

height Property height Number

The height of the object in meters. If undefined, the height will be calculated to maintain the original proportions of the object.

Default Value:10

Example

// height of the symbol in meters
symbolLayer.height = 1000;

material Property material Objectautocast

The material used to shade the object. This property defines the object's color.

Property: color Color|null|undefined

optional
Autocasts from Object|Number []|String

The fill color of the object. If the object has textures, the textures will be multiplied with the color. This can be autocast with an array of rgb(a) values, named string, hex string or an hsl(a) string, an object with r, g, b, and a properties, or a Color object.

Examples

// CSS color string
symbolLayer.material = {
  color: "dodgerblue"
};

// HEX string
symbolLayer.material = {
  color: "#33cc33";
}

// array of RGBA values
symbolLayer.material = {
  color: [51, 204, 51, 0.3];
}

// object with rgba properties
symbolLayer.material = {
  color: {
    r: 51,
    g: 51,
    b: 204,
    a: 0.7
  }
};

resource Property resource Object

The primitive shape (primitive) or external 3D model (href) used to visualize the points. If both properties are present, primitive takes precedence and href is ignored. When using the href property, external 3D models must be present in glTF format.

Properties

primitive String|null|undefined

optional

Uses a built-in shape. See the table below for possible values.

Value	Description
sphere
cylinder
cube
cone
inverted-cone
diamond
tetrahedron

href String|null|undefined

optional

The URL to the 3D model in glTF format. The URL should point to a glTF file (.gltf or .glb) which can reference additional binary (.bin) and image files (.jpg, .png). See the guide topic on Visualizing points with 3D symbols to learn how to use a custom 3D model.

Default Value:{ primitive: "sphere" }

See also

Sample: Visualize features with realistic 3D symbols

roll Property roll Number Since: ArcGIS Maps SDK for JavaScript 4.4 ObjectSymbol3DLayer since 4.0, roll added at 4.4.

The rotation of the symbol in the lateral vertical plane (i.e., around the y axis). The rotation is specified in degrees and is relative to the x-axis. At 0 degrees, the model is level. A positive value lifts the left part and lowers the right part of the model.

Example

// roll of the symbol in degrees
symbolLayer.roll = 90;

tilt Property tilt Number Since: ArcGIS Maps SDK for JavaScript 4.4 ObjectSymbol3DLayer since 4.0, tilt added at 4.4.

The rotation of the symbol in the longitudinal vertical plane (i.e., around the x axis). The rotation is specified in degrees and is relative to the y-axis. At 0 degrees, the model is level. A positive value points lifts the front and lowers the back of the model.

Example

// tilt of the symbol in degrees
symbolLayer.tilt = 45;

type Property type Stringreadonly

The object type.

For ObjectSymbol3DLayer the type is always "object".

width Property width Number

The width, or diameter from east to west, of the object in meters. If undefined, the width will be calculated to maintain the original proportions of the object.

Default Value:10

Example

// width of the symbol in meters
symbolLayer.width = 5000;

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
ObjectSymbol3DLayer	Creates a deep clone of the symbol layer.	ObjectSymbol3DLayer
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	Symbol3DLayer
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	Symbol3DLayer

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 4.25.

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

clone Method clone(){ObjectSymbol3DLayer}

Creates a deep clone of the symbol layer.

Returns

Type	Description
ObjectSymbol3DLayer	A deep clone of the object that invoked this method.

Example

// Creates a deep clone of the graphic's first symbol layer
let symLyr = graphic.symbol.symbolLayers.at(0).clone();

fromJSON Inherited Method fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter

json Object

A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns

Type	Description
*	Returns a new instance of this class.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 4.25.

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type	Description
Boolean	Returns `true` if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles Inherited Method removeHandles(groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 4.25.

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

toJSON Inherited Method toJSON(){Object} Inherited from Symbol3DLayer

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.