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- <body>
- [page:LightShadow] →
- <h1>[name]</h1>
- <p class="desc">
- 这是用于在[page:DirectionalLight DirectionalLights]内部计算阴影<br /><br />
- 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。
- </p>
- <h2>代码示例</h2>
- <code>
- //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 );
- </code>
- <h2>构造函数</h2>
- <h3>[name]( )</h3>
- <p>
- 创建一个新的[name],不能直接调用-它是在[page:DirectionalLight DirectionalLights]内部调用使用
- </p>
- <h2>属性</h2>
- <p>
- 参阅[page:LightShadow LightShadow]类来了解常用的基本属性
- </p>
- <h3>[property:Camera camera]</h3>
- <p>
- 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。<br /><br />
- </p>
- <h3>[property:Boolean isDirectionalLightShadow]</h3>
- <p>
- Read-only flag to check if a given object is of type [name].
- </p>
- <h2>方法</h2>
- <p>
- 有关常用方法,请参阅基础[page:LightShadow LightShadow]类。
- </p>
- <h2>源码</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/src/lights/[name].js src/lights/[name].js]
- </p>
- </body>
- </html>
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