XRReferenceSpaceType

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XRReferenceSpaceType enumerated type defines the strings which identify the types of reference spaces supported by WebXR. This type is used when calling the requestReferenceSpace() method to obtain a reference space for an XRSession .

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The reference space returned by XRSession.requestReferenceSpace() 是 XRReferenceSpace or XRBoundedReferenceSpace . The "Interface" column in the table below indicates which of the two types is returned for each reference space type constant..

Reference space descriptors

The types of reference space are listed in the table below, with brief information about their use cases and which interface is used to implement them.

XRReferenceSpaceType	描述	接口
`bounded-floor`	类似于 `local` type, except the user is not expected to move outside a predetermined boundary, given by the `boundsGeometry` in the returned object.	`XRBoundedReferenceSpace`
`local`	A tracking space whose native origin is located near the viewer's position at the time the session was created. The exact position depends on the underlying platform and implementation. The user isn't expected to move much if at all beyond their starting position, and tracking is optimized for this use case. For devices with six degrees of freedom (6DoF) tracking, the `local` reference space tries to keep the origin stable relative to the environment.	`XRReferenceSpace`
`local-floor`	类似于 `local` type, except the starting position is placed in a safe location for the viewer to stand, where the value of the y axis is 0 at floor level. If that floor level isn't known, the 用户代理 will estimate the floor level. If the estimated floor level is non-zero, the browser is expected to round it such a way as to avoid fingerprinting (likely to the nearest centimeter).	`XRReferenceSpace`
`unbounded`	A tracking space which allows the user total freedom of movement, possibly over extremely long distances from their origin point. The viewer isn't tracked at all; tracking is optimized for stability around the user's current position, so the native origin may drift as needed to accommodate that need.	`XRReferenceSpace`
`viewer`	A tracking space whose native origin tracks the viewer's position and orientation. This is used for environments in which the user can physically move around, and is supported by all instances of `XRSession` , both immersive and inline, though it's most useful for inline sessions. It's particularly useful when determining the distance between the viewer and an input, or when working with offset spaces. Otherwise, typically, one of the other reference space types will be used more often.	`XRReferenceSpace`

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规范	状态	注释
WebXR 设备 API The definition of 'XRReferenceSpaceType' in that specification.	工作草案	初始定义。

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No compatibility data found. Please contribute data for "api.XRReferenceSpaceType" (depth: 1) to the MDN 兼容性数据存储库 .

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最后修改： Apr 10, 2020

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Reference space descriptors

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