[page:Object3D] → [page:Light] →

[name]

This light gets emitted from a single point in one direction, along a cone that increases in size the further from the light it gets.

This light can cast shadows - see the [page:SpotLightShadow] page for details.

Code Example

// white spotlight shining from the side, casting a shadow const spotLight = new THREE.SpotLight( 0xffffff ); spotLight.position.set( 100, 1000, 100 ); spotLight.castShadow = true; spotLight.shadow.mapSize.width = 1024; spotLight.shadow.mapSize.height = 1024; spotLight.shadow.camera.near = 500; spotLight.shadow.camera.far = 4000; spotLight.shadow.camera.fov = 30; scene.add( spotLight );

Examples

[example:webgl_lights_spotlight lights / spotlight ]
[example:webgl_lights_spotlights lights / spotlights ]

Constructor

[name]( [param:Integer color], [param:Float intensity], [param:Float distance], [param:Radians angle], [param:Float penumbra], [param:Float decay] )

[page:Integer color] - (optional) hexadecimal color of the light. Default is 0xffffff (white).
[page:Float intensity] - (optional) numeric value of the light's strength/intensity. Default is 1.

[page:Float distance] - Maximum range of the light. Default is 0 (no limit).
[page:Radians angle] - Maximum angle of light dispersion from its direction whose upper bound is Math.PI/2.
[page:Float penumbra] - Percent of the spotlight cone that is attenuated due to penumbra. Takes values between zero and 1. Default is zero.
[page:Float decay] - The amount the light dims along the distance of the light.

Creates a new [name].

Properties

See the base [page:Light Light] class for common properties.

[property:Float angle]

Maximum extent of the spotlight, in radians, from its direction. Should be no more than `Math.PI/2`. The default is `Math.PI/3`.

[property:Boolean castShadow]

If set to `true` light will cast dynamic shadows. *Warning*: This is expensive and requires tweaking to get shadows looking right. See the [page:SpotLightShadow] for details. The default is `false`.

[property:Float decay]

The amount the light dims along the distance of the light.
In [page:WebGLRenderer.physicallyCorrectLights physically correct] mode, decay = 2 leads to physically realistic light falloff. The default is `1`.

[property:Float distance]

`Default mode` — When distance is zero, light does not attenuate. When distance is non-zero, light will attenuate linearly from maximum intensity at the light's position down to zero at this distance from the light.

`[page:WebGLRenderer.physicallyCorrectLights Physically correct] mode` — When distance is zero, light will attenuate according to inverse-square law to infinite distance. When distance is non-zero, light will attenuate according to inverse-square law until near the distance cutoff, where it will then attenuate quickly and smoothly to `0`. Inherently, cutoffs are not physically correct.

Default is `0.0`.

[property:Float intensity]

The light's intensity. Default is `1`.
In [page:WebGLRenderer.physicallyCorrectLights physically correct] mode, intensity is the luminous intensity of the light measured in candela (cd).

Changing the power will also change the light's intensity.

[property:Boolean isSpotLight]

Read-only flag to check if a given object is of type [name].

[property:Float penumbra]

Percent of the spotlight cone that is attenuated due to penumbra. Takes values between zero and 1. The default is `0.0`.

[property:Vector3 position]

This is set equal to [page:Object3D.DefaultUp] (0, 1, 0), so that the light shines from the top down.

[property:Float power]

The light's power.
In [page:WebGLRenderer.physicallyCorrectLights physically correct] mode, power is the luminous power of the light measured in lumens (lm).

Changing this will also change the light's intensity.

[property:SpotLightShadow shadow]

A [page:SpotLightShadow] used to calculate shadows for this light.

[property:Object3D target]

The Spotlight points from its [page:.position position] to target.position. The default position of the target is *(0, 0, 0)*.
*Note*: For the target's position to be changed to anything other than the default, it must be added to the [page:Scene scene] using scene.add( light.target ); This is so that the target's [page:Object3D.matrixWorld matrixWorld] gets automatically updated each frame.

It is also possible to set the target to be another object in the scene (anything with a [page:Object3D.position position] property), like so: const targetObject = new THREE.Object3D(); scene.add(targetObject); light.target = targetObject; The spotlight will now track the target object.

Methods

See the base [page:Light Light] class for common methods.

[method:undefined dispose]()

Override of base class's [page:Light.dispose dispose]. Disposes of this light's [page:SpotLightShadow shadow].

[method:this copy]( [param:SpotLight source] )

Copies value of all the properties from the [page:SpotLight source] to this SpotLight.

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]