Testing Accuracy on Hololens 2

Question

Testing Accuracy on Hololens 2

Abhi 1

Hello,

I am new to Hololens 2 Development. I am trying to test the effect on accuracy on performing a task with Hololens 2. For this, I have planned to create different tasks and ask the users to perform the tasks by offsetting the virtual hand position from real hand.

I couldn't get a clear idea where I have to add an offset value so that the virtual hands gets offsetted by a certain distance.

Thank you.

Answer 1

Seth DU - MSFT 536 Microsoft Employee

Hello, welcome to Microsoft Q&A,

According to the description, I assume it is the visual effects of hands that you want set offset when handling tasks, it can be done easily. Please let me know if I understand correctly.

I am referring Example scenes - MRTK 2 and have imported the official hand tracking sample. You may navigate to [MixedRealityToolkits profiles in Unity] -> [Input] -> [Articulated Hand Tracking]. There are Joint Prefab, Palm Prefab, etc. and they are the visual game objects that placed by MRTK input. Usually, it is not allowed to edit Prefab in Package folder, and you may drag/copy the object from Packages/com.microsoft.mixedreality.toolkit.foundation/SDK/Features/UX/Prefabs/Hands to Assets folder, then attach and replace the original reference. After that, you can create Unity scripts for offset settings like below.

void Update()  
{  
        Transform current = transform;  
        transform.position = current.position + new Vector3(0.2f, 0.2f, 0.2f);  
}

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Abhi 1 Reputation point

2022-06-23T07:45:53.063+00:00

Hello Mr. SethDu,

Thank you for your answer. I could able to offset the visual representation of hands but the problem it only offsets the visual representation of hand but the actual collider which interacts with GameObjects. I am trying to offset the entire hand along with colliders and hand ray so that the user really feels there is an offset while interaction( for example in case of interacting with a button).

I have already tried offsetting the BaseControllerPointer Position which offsets the hand ray but the hand ray isn't straight it is in the form of parabolic shape.

Can you help me whether the approach is right?

Thank you for your great support.
Seth DU - MSFT 536 Reputation points Microsoft Employee

2022-06-24T06:25:14.627+00:00

Pointers in MRTK is more like visual indicator for the extent of rays. Setting offset of Pointer won't change the actual ray from hands.

For now MRKT only supports getting rays and you may refer to: [Accessing input state in MRTK — MRTK2] (https://learn.microsoft.com/en-us/windows/mixed-reality/mrtk-unity/mrtk2/features/input/input-state?view=mrtkunity-2022-05). You need to duplicate the rays you can get and set offsets for the visual effects.
Abhi 1 Reputation point

2022-06-24T08:04:36.203+00:00

Thank you very much.

I got it working.

Another Question:

Can we create a fake Latency in Hololens 2 ? Because I also want to create a Latency in milliseconds and test the impact of user behaviour on this effect.

Can I get some suggestions or ideas regarding this?

Thank you once again for your support.
Seth DU - MSFT 536 Reputation points Microsoft Employee

2022-06-27T02:21:32.737+00:00

To help us track this issue, please send a new thread. Thanks for your understanding.

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Testing Accuracy on Hololens 2

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