SpotLightShadow

这在SpotLights内部用于计算阴影。

例子

//Create a WebGLRenderer and turn on shadows in the renderer
var 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
var 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

//Create a sphere that cast shadows (but does not receive them)
var sphereGeometry = new THREE.SphereBufferGeometry( 5, 32, 32 );
var sphereMaterial = new THREE.MeshStandardMaterial( { color: 0xff0000 } );
var 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)
var planeGeometry = new THREE.PlaneBufferGeometry( 20, 20, 32, 32 );
var planeMaterial = new THREE.MeshStandardMaterial( { color: 0x00ff00 } )
var plane = new THREE.Mesh( planeGeometry, planeMaterial );
plane.receiveShadow = true;
scene.add( plane );

//Create a helper for the shadow camera (optional)
var helper = new THREE.CameraHelper( light.shadow.camera );
scene.add( helper );

构造函数

构造函数创建一个 PerspectiveCamera : PerspectiveCamera 来管理阴影的世界视图

属性

有关常用属性，请参阅基础LightShadow类。

.camera : Camera

在光的世界里。这用于生成场景的深度图;从光的角度来看，其他物体背后的物体将处于阴影中。

默认值为PerspectiveCamera，近剪裁平面为0.5。 fov将通过更新方法跟踪拥有SpotLight的角度属性。

同样，aspect属性将跟踪mapSize的方面。如果设置了灯光的距离属性，则远剪裁平面将跟踪该值，否则默认为500。

.isSpotLightShadow : Boolean

用于检查此类或派生类是否为聚光灯阴影。默认为true。

您不应该更改它，因为它在内部用于优化。

方法

有关常用方法，请参阅基础LightShadow类。

.update ( light : SpotLight ) : SpotLightShadow

根据传入的light更新内部透视camera。