QuadraticBezierCurve.html 1.7 KB

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  1. <!DOCTYPE html>
  2. <html lang="zh">
  3. <head>
  4. <meta charset="utf-8" />
  5. <base href="../../../../" />
  6. <script src="page.js"></script>
  7. <link type="text/css" rel="stylesheet" href="page.css" />
  8. </head>
  9. <body>
  10. [page:Curve] &rarr;
  11. <h1>二维二次贝塞尔曲线([name])</h1>
  12. <p class="desc">
  13. 创建一条平滑的二维
  14. <a href="http://en.wikipedia.org/wiki/B%C3%A9zier_curve#mediaviewer/File:B%C3%A9zier_2_big.gif" target="_blank">二次贝塞尔曲线</a>,
  15. 由起点、终点和一个控制点所定义。
  16. </p>
  17. <h2>代码示例</h2>
  18. <code>
  19. const curve = new THREE.QuadraticBezierCurve(
  20. new THREE.Vector2( -10, 0 ),
  21. new THREE.Vector2( 20, 15 ),
  22. new THREE.Vector2( 10, 0 )
  23. );
  24. const points = curve.getPoints( 50 );
  25. const geometry = new THREE.BufferGeometry().setFromPoints( points );
  26. const material = new THREE.LineBasicMaterial( { color: 0xff0000 } );
  27. //Create the final object to add to the scene
  28. const curveObject = new THREE.Line( geometry, material );
  29. </code>
  30. <h2>构造函数</h2>
  31. <h3>[name]( [param:Vector2 v0], [param:Vector2 v1], [param:Vector2 v2] )</h3>
  32. <p>
  33. [page:Vector2 v0] – 起点<br/>
  34. [page:Vector2 v1] – 中间的控制点<br/>
  35. [page:Vector2 v2] – 终点<br/>
  36. </p>
  37. <h2>属性</h2>
  38. <p>共有属性请参见其基类[page:Curve]。</p>
  39. <h3>[property:Vector2 v0]</h3>
  40. <p>起点</p>
  41. <h3>[property:Vector2 v1]</h3>
  42. <p>控制点</p>
  43. <h3>[property:Vector2 v2]</h3>
  44. <p>终点</p>
  45. <h2>方法</h2>
  46. <p>共有方法请参见其基类[page:Curve]。</p>
  47. <h2>源代码</h2>
  48. <p>
  49. [link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
  50. </p>
  51. </body>
  52. </html>