three.js DirectionalLightShadow

這是用于在DirectionalLights內(nèi)部計(jì)算陰影

與其他陰影類不同，它是使用OrthographicCamera來(lái)計(jì)算陰影，而不是PerspectiveCamera。這是因?yàn)閬?lái)自DirectionalLight的光線是平行的。

代碼示例

//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 DirectionalLight and turn on shadows for the light
const light = new THREE.DirectionalLight( 0xffffff, 1 );
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)
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 );

構(gòu)造函數(shù)

DirectionalLightShadow( )

創(chuàng)建一個(gè)新的DirectionalLightShadow，不能直接調(diào)用-它是在DirectionalLights內(nèi)部調(diào)用使用

屬性

參閱LightShadow類來(lái)了解常用的基本屬性

.camera : Camera

在光的世界里。這用于生成場(chǎng)景的深度圖;從光的角度來(lái)看，其他物體背后的物體將處于陰影中。

.isDirectionalLightShadow : Boolean

只讀標(biāo)志，用于檢查給定對(duì)象是否屬于 DirectionalLightShadow 類型。

方法

有關(guān)常用方法，請(qǐng)參閱基礎(chǔ)LightShadow類。

源碼

src/lights/DirectionalLightShadow.js