DirectionalLightShadow

这是用于在DirectionalLights内部计算阴影

与其他阴影类不同，它是使用OrthographicCamera来计算阴影，而不是PerspectiveCamera。这是因为来自DirectionalLight的光线是平行的。

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 DirectionalLight and turn on shadows for the light 
var light = new THREE.DirectionalLight( 0xffffff, 1, 100 ); 
light.position.set( 0, 1, 0 ); //default; light shining from top 
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

DirectionalLightShadow( )

创建一个新的DirectionalLightShadow，不能直接调用-它是在DirectionalLights内部调用使用

属性

参阅LightShadow类来了解常用的基本属性

# .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。

方法

有关常用方法，请参阅基础[page：LightShadow LightShadow]类。

源码

src/lights/DirectionalLightShadow.js