This is used internally by [page:SpotLight SpotLights] for calculating shadows.
//Create a WebGLRenderer and turn on shadows in the renderer
const renderer = new THREE.WebGLRenderer();
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap; // default THREE.PCFShadowMap
//Create a SpotLight and turn on shadows for the light
const light = new THREE.SpotLight( 0xffffff );
light.castShadow = true; // default false
scene.add( light );
//Set up shadow properties for the light
light.shadow.mapSize.width = 512; // default
light.shadow.mapSize.height = 512; // default
light.shadow.camera.near = 0.5; // default
light.shadow.camera.far = 500; // default
light.shadow.focus = 1; // default
//Create a sphere that cast shadows (but does not receive them)
const sphereGeometry = new THREE.SphereGeometry( 5, 32, 32 );
const sphereMaterial = new THREE.MeshStandardMaterial( { color: 0xff0000 } );
const sphere = new THREE.Mesh( sphereGeometry, sphereMaterial );
sphere.castShadow = true; //default is false
sphere.receiveShadow = false; //default
scene.add( sphere );
//Create a plane that receives shadows (but does not cast them)
const planeGeometry = new THREE.PlaneGeometry( 20, 20, 32, 32 );
const planeMaterial = new THREE.MeshStandardMaterial( { color: 0x00ff00 } )
const plane = new THREE.Mesh( planeGeometry, planeMaterial );
plane.receiveShadow = true;
scene.add( plane );
//Create a helper for the shadow camera (optional)
const helper = new THREE.CameraHelper( light.shadow.camera );
scene.add( helper );
The constructor creates a [param:PerspectiveCamera PerspectiveCamera] to manage the shadow's view of the world.
See the base [page:LightShadow LightShadow] class for common properties.
The light's view of the world. This is used to generate a depth map of the scene; objects behind
other objects from the light's perspective will be in shadow.
The default is a [page:PerspectiveCamera] with [page:PerspectiveCamera.near near] clipping plane at `0.5`.
The [page:PerspectiveCamera.fov fov] will track the [page:SpotLight.angle angle] property of the owning
[page:SpotLight SpotLight] via the [page:SpotLightShadow.update update] method. Similarly, the
[page:PerspectiveCamera.aspect aspect] property will track the aspect of the
[page:LightShadow.mapSize mapSize]. If the [page:SpotLight.distance distance] property of the light is
set, the [page:PerspectiveCamera.far far] clipping plane will track that, otherwise it defaults to `500`.
Used to focus the shadow camera. The camera's field of view is set as a percentage of the spotlight's field-of-view. Range is `[0, 1]`. Default is `1.0`.
Read-only flag to check if a given object is of type [name].
See the base [page:LightShadow LightShadow] class for common methods.
[link:https://github.com/mrdoob/three.js/blob/master/src/lights/[name].js src/lights/[name].js]