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93 lines
2.5 KiB
93 lines
2.5 KiB
<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="utf-8" />
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<base href="../../../" />
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<script src="page.js"></script>
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<link type="text/css" rel="stylesheet" href="page.css" />
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</head>
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<body>
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[page:Object3D] →
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<h1>[name]</h1>
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<p class="desc">用于模拟方向的3维箭头对象.</p>
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<h2>代码示例</h2>
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<code>
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const dir = new THREE.Vector3( 1, 2, 0 );
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//normalize the direction vector (convert to vector of length 1)
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dir.normalize();
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const origin = new THREE.Vector3( 0, 0, 0 );
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const length = 1;
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const hex = 0xffff00;
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const arrowHelper = new THREE.ArrowHelper( dir, origin, length, hex );
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scene.add( arrowHelper );
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</code>
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<h2>例子</h2>
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<p>
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[example:webgl_shadowmesh WebGL / shadowmesh]
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</p>
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<h2>构造函数</h2>
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<h3>[name]([param:Vector3 dir], [param:Vector3 origin], [param:Number length], [param:Number hex], [param:Number headLength], [param:Number headWidth] )</h3>
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<p>
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[page:Vector3 dir] -- 基于箭头原点的方向. 必须为单位向量. <br />
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[page:Vector3 origin] -- 箭头的原点.<br />
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[page:Number length] -- 箭头的长度. 默认为 *1*.<br />
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[page:Number hex] -- 定义的16进制颜色值. 默认为 0xffff00.<br />
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[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 />
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[page:Number headWidth] -- The width of the head of the arrow. Default is 0.2 * headLength.<br />
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</p>
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<h2>属性</h2>
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<p>请到基类 [page:Object3D] 页面查看公共属性.</p>
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<h3>[property:Line line]</h3>
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<p>包含箭头辅助对象的线段部分.</p>
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<h3>[property:Mesh cone]</h3>
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<p>包含箭头辅助对象的锥体部分.</p>
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<h2>方法</h2>
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<p>请到基类 [page:Object3D] 页面查看公共方法.</p>
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<h3>[method:undefined setColor]([param:Color color])</h3>
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<p>
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color -- 所需的颜色。<br /><br />
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设置箭头辅助对象的颜色.
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</p>
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<h3>[method:undefined setLength]([param:Number length], [param:Number headLength], [param:Number headWidth])</h3>
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<p>
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length -- 要设置的长度.<br />
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headLength -- 要设置的箭头头部(锥体)的长度.<br />
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headWidth -- The width of the head of the arrow.<br /><br />
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设置箭头辅助对象的长度.
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</p>
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<h3>[method:undefined setDirection]([param:Vector3 dir])</h3>
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<p>
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dir -- 要设置的方向. 必须为单位向量.<br /><br />
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设置箭头辅助对象的方向.
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</p>
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<h2>源码</h2>
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<p>
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[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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</p>
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</body>
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</html>
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