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82 lines
2.6 KiB
82 lines
2.6 KiB
3 years ago
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<!DOCTYPE html>
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<html lang="en">
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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] → [page:Line] → [page:LineSegments] →
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<h1>[name]</h1>
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<p class="desc">
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Helper object to graphically show the world-axis-aligned bounding box around an object. The actual bounding box is handled with [page:Box3], this is just a visual helper for debugging.
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It can be automatically resized with the [page:BoxHelper.update] method when the object it's created from is transformed.
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Note that the object must have a [page:BufferGeometry] for this to work,
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so it won't work with [page:Sprite Sprites].
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</p>
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<h2>Code Example</h2>
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<code>
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const sphere = new THREE.SphereGeometry();
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const object = new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( 0xff0000 ) );
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const box = new THREE.BoxHelper( object, 0xffff00 );
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scene.add( box );
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</code>
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<h2>Examples</h2>
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<p>
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[example:webgl_helpers WebGL / helpers]<br/>
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[example:webgl_loader_nrrd WebGL / loader / nrrd]<br/>
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[example:webgl_buffergeometry_drawrange WebGL / buffergeometry / drawrange]
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</p>
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<h2>Constructor</h2>
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<h3>[name]( [param:Object3D object], [param:Color color] )</h3>
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<p>
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[page:Object3D object] -- (optional) the object3D to show the world-axis-aligned boundingbox.<br />
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[page:Color color] -- (optional) hexadecimal value that defines the box's color. Default is 0xffff00.<br /><br />
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Creates a new wireframe box that bounds the passed object. Internally this uses [page:Box3.setFromObject]
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to calculate the dimensions. Note that this includes any children.
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</p>
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<h2>Properties</h2>
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<p>See the base [page:LineSegments] class for common properties.</p>
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<h2>Methods</h2>
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<p>See the base [page:LineSegments] class for common methods.</p>
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<h3>[method:undefined update]()</h3>
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<p>
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Updates the helper's geometry to match the dimensions
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of the object, including any children. See [page:Box3.setFromObject].
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</p>
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<h3>[method:this setFromObject]( [param:Object3D object] )</h3>
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<p>
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[page:Object3D object] - [page:Object3D] to create the helper of.<br /><br />
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Updates the wireframe box for the passed object.
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</p>
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<h3>[method:undefined dispose]()</h3>
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<p>
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Frees the GPU-related resources allocated by this instance. Call this method whenever this instance is no longer used in your app.
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</p>
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<h2>Source</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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