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108 lines
3.2 KiB
108 lines
3.2 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>线（[name]）</h1>
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<p class="desc">
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一条连续的线。<br /><br />
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它几乎和[page:LineSegments]是一样的，唯一的区别是它在渲染时使用的是[link:https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/drawElements gl.LINE_STRIP]，
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而不是[link:https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/drawElements gl.LINES]。
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</p>
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<h2>代码示例</h2>
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<code>
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const material = new THREE.LineBasicMaterial({
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color: 0x0000ff
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});
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const points = [];
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points.push( new THREE.Vector3( - 10, 0, 0 ) );
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points.push( new THREE.Vector3( 0, 10, 0 ) );
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points.push( new THREE.Vector3( 10, 0, 0 ) );
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const geometry = new THREE.BufferGeometry().setFromPoints( points );
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const line = new THREE.Line( geometry, material );
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scene.add( line );
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</code>
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<h2>构造器</h2>
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<h3>[name]( [param:BufferGeometry geometry], [param:Material material] )</h3>
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<p>
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[page:BufferGeometry geometry] —— 表示线段的顶点，默认值是一个新的[page:BufferGeometry]。<br />
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[page:Material material] —— 线的材质，默认值是一个新的具有随机颜色的[page:LineBasicMaterial]。<br />
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</p>
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<h2>属性</h2>
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<p>共有属性请参见其基类[page:Object3D]。</p>
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<h3>[property:BufferGeometry geometry]</h3>
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<p>表示线段的顶点。</p>
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<h3>[property:Boolean isLine]</h3>
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<p>
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Read-only flag to check if a given object is of type [name].
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</p>
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<h3>[property:Material material]</h3>
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<p>线的材质。</p>
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<h3>[property:Array morphTargetInfluences]</h3>
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<p>
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An array of weights typically from 0-1 that specify how much of the morph is applied.
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Undefined by default, but reset to a blank array by [page:.updateMorphTargets]().
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</p>
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<h3>[property:Object morphTargetDictionary]</h3>
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<p>
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A dictionary of morphTargets based on the morphTarget.name property.
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Undefined by default, but rebuilt [page:.updateMorphTargets]().
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</p>
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<h2>方法</h2>
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<p>共有方法请参见其基类 [page:Object3D]。</p>
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<h3>[method:this computeLineDistances]()</h3>
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<p>
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计算[page:LineDashedMaterial]所需的距离的值的数组。
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对于几何体中的每一个顶点，这个方法计算出了当前点到线的起始点的累积长度。
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</p>
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<h3>[method:undefined raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
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<p>
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在一条投射出去的[page:Ray]（射线）和这条线之间产生交互。
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[page:Raycaster.intersectObject]将会调用这个方法。
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</p>
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<h3>[method:Line clone]()</h3>
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<p>
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返回这条线及其子集的一个克隆对象。
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</p>
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<h3>[method:undefined updateMorphTargets]()</h3>
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<p>
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Updates the morphTargets to have no influence on the object. Resets the
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[page:.morphTargetInfluences] and [page:.morphTargetDictionary] properties.
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</p>
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<h2>源代码</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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