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VertexNormalsHelper.html 2.3 KB

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  1. <!DOCTYPE html>
  2. <html lang="en">
  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:Object3D] &rarr; [page:Line] &rarr;
  11. <h1>[name]</h1>
  12. <p class="desc">
  13. Renders [page:ArrowHelper arrows] to visualize an object's vertex normal vectors.
  14. Requires that normals have been specified in a [page:BufferAttribute custom attribute] or
  15. have been calculated using [page:BufferGeometry.computeVertexNormals computeVertexNormals].<br /><br />
  16. </p>
  17. <h2>Code Example</h2>
  18. <code>
  19. const geometry = new THREE.BoxGeometry( 10, 10, 10, 2, 2, 2 );
  20. const material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
  21. const box = new THREE.Mesh( geometry, material );
  22. const helper = new VertexNormalsHelper( box, 2, 0x00ff00, 1 );
  23. scene.add( box );
  24. scene.add( helper );
  25. </code>
  26. <h2>Examples</h2>
  27. <p>
  28. [example:webgl_helpers WebGL / helpers]
  29. </p>
  30. <h2>Constructor</h2>
  31. <h3>[name]( [param:Object3D object], [param:Number size], [param:Hex color], [param:Number linewidth] )</h3>
  32. <p>
  33. [page:Object3D object] -- object for which to render vertex normals.<br />
  34. [page:Number size] -- (optional) length of the arrows. Default is 1.<br />
  35. [page:Hex color] -- hex color of the arrows. Default is 0xff0000.<br />
  36. [page:Number linewidth] -- (optional) width of the arrow lines. Default is 1.
  37. </p>
  38. <h2>Properties</h2>
  39. <p>See the base [page:LineSegments] class for common properties.</p>
  40. <h3>[property:Object matrixAutoUpdate]</h3>
  41. <p>
  42. See [page:Object3D.matrixAutoUpdate]. Set to *false* here as the helper is using the
  43. object's [page:Object3D.matrixWorld matrixWorld].
  44. </p>
  45. <h3>[property:Object3D object]</h3>
  46. <p>The object for which the vertex normals are being visualized.</p>
  47. <h3>[property:Number size]</h3>
  48. <p>Length of the arrows. Default is *1*.</p>
  49. <h2>Methods</h2>
  50. <p>See the base [page:LineSegments] class for common methods.</p>
  51. <h3>[method:null update]()</h3>
  52. <p>Updates the vertex normal preview based on movement of the object.</p>
  53. <h2>Source</h2>
  54. <p>
  55. [link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/helpers/VertexNormalsHelper.js examples/jsm/helpers/VertexNormalsHelper.js]
  56. </p>
  57. </body>
  58. </html>