1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283 |
- <!DOCTYPE html>
- <html lang="zh">
- <head>
- <meta charset="utf-8" />
- <base href="../../../" />
- <script src="list.js"></script>
- <script src="page.js"></script>
- <link type="text/css" rel="stylesheet" href="page.css" />
- </head>
- <body>
- [page:Object3D] → [page:Line] → [page:LineSegments] →
- <h1>[name]</h1>
- <p class="desc">
- 渲染箭头辅助对象 [page:ArrowHelper arrows] 来模拟面 [page:Face3 face] 的法线.
- 需要所有面 [page:Face3 faces] 都指定了法线 或
- 通过 [page:Geometry.computeFaceNormals computeFaceNormals] 方法计算面的法线. <br /><br />
- 注意:仅几何体为 [page:Geometry] 类型的对象能正常运行.
- 对于 [page:BufferGeometry] 类型几何体的对象请使用 [page:VertexNormalsHelper] 代替.
- <p>
- <h2>例子</h2>
- <div>[example:webgl_helpers WebGL / helpers]</div>
- <code>
- geometry = new THREE.BoxGeometry( 10, 10, 10, 2, 2, 2 );
- material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
- box = new THREE.Mesh( geometry, material );
- helper = new THREE.FaceNormalsHelper( box, 2, 0x00ff00, 1 );
- scene.add( box );
- scene.add( helper );
- </code>
- <h2>构造函数</h2>
- <h3>[name]( [param:Object3D object], [param:Number size], [param:Color color], [param:Number linewidth] )</h3>
- <p>
- [page:Object3D object] -- 要渲染面法线辅助的对象.<br />
- [page:Number size] -- (可选的) 箭头的长度. 默认为 *1*.<br />
- [page:Hex color] -- (可选的) 箭头的颜色. 默认为 *0xffff00*.<br />
- [page:Number linewidth] -- (可选的) 箭头线段的宽度. 默认为 *1*.
- </p>
- <h2>属性</h2>
- <p>请到基类 [page:LineSegments] 页面查看公共属性.</p>
- <h3>[property:object matrixAutoUpdate]</h3>
- <p>
- 请查看 [page:Object3D.matrixAutoUpdate]. 这里设置为 *false* 表示辅助对象
- 使用对象的世界矩阵 [page:Object3D.matrixWorld matrixWorld].
- </p>
- <h3>[property:Object3D object]</h3>
- <p>被渲染面法线辅助的对象.</p>
- <h3>[property:Number size]</h3>
- <p>箭头的长度. 默认为 *1*.</p>
- <h2>方法</h2>
- <p>请到基类 [page:LineSegments] 页面查看公共方法.</p>
- <h3>[method:null update]()</h3>
- <p>基于对象的运动更新面法线辅助对象.</p>
- <h2>源码</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/helpers/FaceNormalsHelper.js examples/jsm/helpers/FaceNormalsHelper.js]
- </p>
- </body>
- </html>
|