You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.4 KiB
82 lines
2.4 KiB
<!DOCTYPE html>
|
|
<html lang="zh">
|
|
<head>
|
|
<meta charset="utf-8" />
|
|
<base href="../../../" />
|
|
<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">
|
|
Renders arrows to visualize an object's vertex tangent vectors.
|
|
Requires that tangents have been specified in a [page:BufferAttribute custom attribute] or
|
|
have been calculated using [page:BufferGeometry.computeTangents computeTangents].<br /><br />
|
|
|
|
This helper supports [page:BufferGeometry] only.
|
|
</p>
|
|
|
|
<h2>代码示例</h2>
|
|
|
|
<code>
|
|
const geometry = new THREE.BoxGeometry( 10, 10, 10, 2, 2, 2 );
|
|
const material = new THREE.MeshNormalMaterial();
|
|
const box = new THREE.Mesh( geometry, material );
|
|
|
|
const helper = new VertexTangentsHelper( box, 1, 0x00ffff, 1 );
|
|
|
|
scene.add( box );
|
|
scene.add( helper );
|
|
</code>
|
|
|
|
<h2>例子</h2>
|
|
<p>
|
|
[example:webgl_helpers WebGL / helpers]
|
|
</p>
|
|
|
|
<h2>Constructor</h2>
|
|
|
|
|
|
<h3>[name]( [param:Object3D object], [param:Number size], [param:Hex color], [param:Number linewidth] )</h3>
|
|
<p>
|
|
[page:Object3D object] -- object for which to render vertex tangents.<br />
|
|
[page:Number size] -- (optional) length of the arrows. Default is *1*.<br />
|
|
[page:Hex color] -- hex color of the arrows. Default is 0x00ffff.<br />
|
|
[page:Number linewidth] -- (optional) width of the arrow lines. Default is *1*. (Setting lineWidth is currently not supported.)
|
|
</p>
|
|
|
|
|
|
<h2>Properties</h2>
|
|
<p>See the base [page:LineSegments] class for common properties.</p>
|
|
|
|
<h3>[property:Object matrixAutoUpdate]</h3>
|
|
<p>
|
|
See [page:Object3D.matrixAutoUpdate]. Set to *false* here as the helper is using the
|
|
objects's [page:Object3D.matrixWorld matrixWorld].
|
|
</p>
|
|
|
|
<h3>[property:Object3D object]</h3>
|
|
<p>The object for which the vertex tangents are being visualized.</p>
|
|
|
|
<h3>[property:Number size]</h3>
|
|
<p>Length of the arrows. Default is *1*.</p>
|
|
|
|
|
|
<h2>Methods</h2>
|
|
<p>See the base [page:LineSegments] class for common methods.</p>
|
|
|
|
|
|
<h3>[method:undefined update]()</h3>
|
|
<p>Updates the vertex tangents preview based on the object's world transform.</p>
|
|
|
|
|
|
<h2>Source</h2>
|
|
|
|
<p>
|
|
[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/helpers/VertexTangentsHelper.js examples/jsm/helpers/VertexTangentsHelper.js]
|
|
</p>
|
|
</body>
|
|
</html>
|
|
|