javascript
/
three.js
espejo de https://github.com/tazdij/three.js.git


			
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		[page:Object3D] &rarr;

		<h1>箭头辅助工具（[name]）</h1>

		<p class="desc">一个用于将方向可视化的三维物体。</p>


		<h2>示例</h2>

		<div>[example:webgl_geometries WebGL / geometries]</div>
		<div>[example:webgl_geometry_normals WebGL / geometry / normals]</div>
		<div>[example:webgl_shadowmesh WebGL / shadowmesh]</div>

		<code>
		var dir = new THREE.Vector3( 1, 2, 0 );

		//normalize the direction vector (convert to vector of length 1)
		dir.normalize();

		var origin = new THREE.Vector3( 0, 0, 0 );
		var length = 1;
		var hex = 0xffff00;

		var arrowHelper = new THREE.ArrowHelper( dir, origin, length, hex );
		scene.add( arrowHelper );
		</code>


		<h2>构造器</h2>


		<h3>[name]([param:Vector3 dir], [param:Vector3 origin], [param:Number length], [param:Number hex], [param:Number headLength], [param:Number headWidth] )</h3>
		<p>
		[page:Vector3 dir] -- 起始方向，必须是一个单位向量。<br />
		[page:Vector3 origin] -- 箭头起始点。<br />
		[page:Number length] -- 箭头长度，默认值为*1*。<br />
		[page:Number hex] -- 箭头颜色，十六进制值，默认值为0xffff00。<br />
		[page:Number headLength] -- 箭头头部的长度，默认值为0.2 * length。<br />
		[page:Number headWidth] -- 箭头头部的宽度，默认值为0.2 * headLength。
		</p>

		<h2>属性</h2>
		<p>请参阅其基类[page:Object3D]来查看共有属性。</p>


		<h3>[property:Line line]</h3>
		<p>包含arrowHelper中线的部分。</p>

		<h3>[property:Mesh cone]</h3>
		<p>包含arrowHelper中圆锥的部分。</p>


		<h2>方法</h2>
		<p>请参阅其基类[page:Object3D]来查看共有方法。</p>


		<h3>[method:null setColor]([param:Number hex])</h3>
		<p>
		hex -- 颜色值，以十六进制来进行表示。<br /><br />

		用于设置arrowHelper的颜色。
		</p>

		<h3>[method:null setLength]([param:Number length], [param:Number headLength], [param:Number headWidth])</h3>
		<p>
		length -- 所需的arrowHelper的长度。<br />
		headLength -- 箭头头部的长度。<br />
		headWidth -- 箭头头部的宽度。<br /><br />

		用于设置arrowhelper的长度。
		</p>

		<h3>[method:null setDirection]([param:Vector3 dir])</h3>
		<p>
		dir -- 所需的arrowHelper的方向，必须是一个单位向量。<br /><br />

		用于设置arrowhelper的方向。
		</p>

		<h2>源代码</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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