LineOfSightTarget | API Reference | ArcGIS Maps SDK for JavaScript 4.31

This class represents a target point for a LineOfSight analysis. The location represents the Point the observer is looking at, while visible indicates whether the line between the observer and the target intersects 3D graphics, integrated mesh or the ground. If it intersects 3D graphics, then the intersectedGraphic property will point to the first intersected graphic. The intersectedLocation corresponds to the first intersection with a 3D graphic, integrated mesh or the ground.

See also

Constructors

LineOfSightTarget Constructor new LineOfSightTarget(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 Watch for changes topic.

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Type	Summary	Class
String	The name of the class.	Accessor
Graphic	The first Graphic intersected by the line of sight.	LineOfSightTarget
Point	A Point representing the location where the line of sight first intersects the ground or 3D objects in the scene.	LineOfSightTarget
Point	A Point representing the location of the target.	LineOfSightTarget
Boolean	Whether the target is visible from the observer or not.	LineOfSightTarget

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

intersectedGraphic Property intersectedGraphic Graphicreadonly

The first Graphic intersected by the line of sight. If no graphic is intersected then this property is null.

intersectedLocation Property intersectedLocation Pointreadonly

A Point representing the location where the line of sight first intersects the ground or 3D objects in the scene. If the target is visible this property is null.

location Property location Pointautocast

A Point representing the location of the target. Once the location is set, a new line of sight analysis will synchronously calculate the intersection and the visibility.

visible Property visible Booleanreadonly

Whether the target is visible from the observer or not.

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
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor

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.

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");