Threejs 增加阴影的方法

admin

, t. y/ e& ], w8 f  d8 D
# z: p; p* b* q! |' T% c5 N官方提供的实例如下

! Q2 H: m5 v1 }5 _7 d1 o1。 首先在Scene里面激活 渲染 ShadowMap
5 w7 e* p, \+ [! e' U1 o//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

2。 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 );
1 N+ D  \, I, g% E) ]5 X
//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
% {7 R% a) [. `( r' k( }, O
3 Z8 c0 o! {- c! C3. 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 );
/ O# b' r8 o: A/ W' U
9 C& ?, \4 t' {' a+ ?' U4. 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 );

% W/ [, z( |& U; M+ f% _


效果如下！


& x; f& o9 k  S3 N- F3 _( l
2 x' `; k/ n- h: a% `