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- <body>
- [page:Object3D] →
- <h1>[name]</h1>
- <p class="desc">用于模拟方向的3维箭头对象.</p>
- <h2>代码示例</h2>
- <code>
- const dir = new THREE.Vector3( 1, 2, 0 );
- //normalize the direction vector (convert to vector of length 1)
- dir.normalize();
- const origin = new THREE.Vector3( 0, 0, 0 );
- const length = 1;
- const hex = 0xffff00;
- const arrowHelper = new THREE.ArrowHelper( dir, origin, length, hex );
- scene.add( arrowHelper );
- </code>
- <h2>例子</h2>
- <p>
- [example:webgl_shadowmesh WebGL / shadowmesh]
- </p>
- <h2>构造函数</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] -- 基于箭头原点的方向. 必须为单位向量. <br />
- [page:Vector3 origin] -- 箭头的原点.<br />
- [page:Number length] -- 箭头的长度. 默认为 *1*.<br />
- [page:Number hex] -- 定义的16进制颜色值. 默认为 0xffff00.<br />
- [page:Number headLength] -- 箭头头部(锥体)的长度. 默认为箭头长度的0.2倍(0.2 * length).<br />
- [page:Number headWidth] -- The width of the head of the arrow. Default is 0.2 * headLength.<br />
- </p>
- <h2>属性</h2>
- <p>请到基类 [page:Object3D] 页面查看公共属性.</p>
- <h3>[property:Line line]</h3>
- <p>包含箭头辅助对象的线段部分.</p>
- <h3>[property:Mesh cone]</h3>
- <p>包含箭头辅助对象的锥体部分.</p>
- <h2>方法</h2>
- <p>请到基类 [page:Object3D] 页面查看公共方法.</p>
- <h3>[method:undefined setColor]([param:Color color])</h3>
- <p>
- color -- 所需的颜色。<br /><br />
- 设置箭头辅助对象的颜色.
- </p>
- <h3>[method:undefined setLength]([param:Number length], [param:Number headLength], [param:Number headWidth])</h3>
- <p>
- length -- 要设置的长度.<br />
- headLength -- 要设置的箭头头部(锥体)的长度.<br />
- headWidth -- The width of the head of the arrow.<br /><br />
- 设置箭头辅助对象的长度.
- </p>
- <h3>[method:undefined setDirection]([param:Vector3 dir])</h3>
- <p>
- dir -- 要设置的方向. 必须为单位向量.<br /><br />
- 设置箭头辅助对象的方向.
- </p>
- <h2>源码</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
- </p>
- </body>
- </html>
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