javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
				
					
						
						
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		<h1>[name]</h1>

		<p class="desc">

			This class represents an abstraction of the WebXR Device API and is internally used by [page:WebGLRenderer].
			[name] also provides a public interface that allows users to enable/disable XR and perform XR related tasks like
			for instance retrieving controllers.
		</p>

		<h2>Properties</h2>

		<h3>[property:Boolean enabled]</h3>
		<p>
		This flag notifies the renderer to be ready for XR rendering. Default is *false*. Set it to *true* if you are going
		to use XR in your app.
		</p>

		<h3>[property:Boolean isPresenting]</h3>
		<p>
		Whether XR presentation is active or not. Default is *false*. This flag is read-only and automatically set by [name].
		</p>

		<h2>Methods</h2>

		<h3>[method:Group getController]( [param:Integer index] )</h3>
		<p>
		[page:Integer index] — The index of the controller. <br /><br />

		Returns a [page:Group] representing the so called *target ray* space of the controller.
		Use this space for visualizing 3D objects that support the user in pointing tasks like UI interaction.
		</p>

		<h3>[method:Group getControllerGrip]( [param:Integer index] )</h3>
		<p>
		[page:Integer index] — The index of the controller. <br /><br />

		Returns a [page:Group] representing the so called *grip* space of the controller.
		Use this space if the user is going to hold other 3D objects like a lightsaber.
		</p>

		<p>
		Note: If you want to show something in the user's hand AND offer a pointing ray at the same time, you'll want to attached the handheld object to the
		group returned by [page:.getControllerGrip]()  and the ray to the group returned by [page:.getController](). The idea is to have two different groups
		in two different coordinate spaces for the same WebXR controller.
		</p>

		<h3>[method:void setFramebufferScaleFactor]( [param:Float framebufferScaleFactor] )</h3>
		<p>
		[page:Float framebufferScaleFactor] — The framebuffer scale factor to set.<br /><br />

		Specifies the scaling factor to use when determining the size of the framebuffer when rendering to a XR device.
		The value is relative to the default XR device display resolution. Default is *1*. A value of *0.5* would specify
		a framebuffer with 50% of the display's native resolution.
		</p>

		<p>
		Note: It is not possible to change the framebuffer scale factor while presenting XR content.
		</p>

		<h3>[method:void setReferenceSpaceType]( [param:String referenceSpaceType] )</h3>
		<p>
		[page:String referenceSpaceType] — The reference space type to set.<br /><br />

		Can be used to configure a spatial relationship with the user's physical environment. Depending on how the user moves in 3D space, setting an
		appropriate reference space can improve tracking. Default is *local-floor*.
		Please check out the [link:https://developer.mozilla.org/en-US/docs/Web/API/XRReferenceSpaceType MDN] for possible values and their use cases.
		</p>

		<p>
		Note: It is not possible to change the reference space type while presenting XR content.
		</p>

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
		</p>
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