Threejs 增加阴影的方法

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, I! \5 V3 g% ]0 d% o+ x: }  K官方提供的实例如下
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, B; f  r" F6 i: O7 N: [6 L1。 首先在Scene里面激活 渲染 ShadowMap
# l: Z( L& u2 e/ m& L7 F% N* A//Create a WebGLRenderer and turn on shadows in the renderervar renderer = new THREE.WebGLRenderer();renderer.shadowMap.enabled = true;renderer.shadowMap.type = THREE.PCFSoftShadowMap; // default THREE.PCFShadowMap

4 i. [( z" Z# @  H, s, G& u- U2。 创建平行光，并可以投射Shadow//Create a DirectionalLight and turn on shadows for the lightvar light = new THREE.DirectionalLight( 0xffffff, 1, 100 );light.position.set( 0, 1, 0 );                         //default; light shining from toplight.castShadow = true;            // default falsescene.add( light );
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//Set up shadow properties for the lightlight.shadow.mapSize.width = 512;  // defaultlight.shadow.mapSize.height = 512; // defaultlight.shadow.camera.near = 0.5;    // defaultlight.shadow.camera.far = 500;     // default

8 }7 e5 f/ U8 ^2 \5 K) ]3. 创建接受shadow的物体 //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 falsesphere.receiveShadow = false; //defaultscene.add( sphere );
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% O. Y" i& `" ?5 p, l2 |. J4. 创建获取投影的平面 //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 );
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效果如下！

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