Indicate the preferred ergonomics of a tracked-pointer ray#524
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Review ping: Anything else you'd like to see changed before landing? |
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| - <dfn enum-value for="XRTargetRayMode">gaze</dfn> indicates the target ray will originate at the user's head and follow the direction they are looking (this is commonly referred to as a "gaze input" device). | ||
| - <dfn enum-value for="XRTargetRayMode">tracked-pointer</dfn> indicates that the target ray originates from either a handheld device or other hand-tracking mechanism and represents that the user is using their hands or the held device for pointing. | ||
| - <dfn enum-value for="XRTargetRayMode">tracked-pointer</dfn> indicates that the target ray originates from either a handheld device or other hand-tracking mechanism and represents that the user is using their hands or the held device for pointing. The orientation of the target ray relative to the tracked object MUST follow platform-specific ergonomics guidelines when available. In the absence of platform-specific guidance, the target ray SHOULD point in the same direction as the user's index finger if it was outstretched. |
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the target ray SHOULD point in the same direction
Any reason why this isn't a MUST either?
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It's feasible that the UA has a tracked device that it knows the position and orientation of but no sense of how it's actually shaped, in which case it's difficult to comply with a MUST here.
NellWaliczek
approved these changes
Feb 25, 2019
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Fixed #516.