Any example of the new 2019.1 XR input system?

I'm so excited to see there is a new XR input mapping system in 2019.1: https://docs.unity3d.com/2019.1/Documentation/Manual/xr_input.html

But haven't been able to find any code example showing how to use it.

Does anyone know how to do something as simple as say spawning a cube in the position of the controller when the trigger is pressed?

Any help would be much appreciated!!

 

Docs say this, wouldn't that do it?

Code (CSharp):

1. bool triggerValue;
2. if (device.TryGetFeatureValue(UnityEngine.XR.CommonUsages.triggerButton,
3.                               out triggerValue)
4.     && triggerValue)
5. {
6.     Debug.Log("Trigger button is pressed");
7. }

 

Thanks that was helpful!

The documentation for 2019.1 has been expanded over the last couple of days and it new features multiple examples (none of that code was present when I asked here): https://docs.unity3d.com/2019.1/Documentation/Manual/xr_input.html

 

In case it helps anyone, the following script will allow you to call any method when a button is pressed, and when it's released. This only works for the Button entries here (https://docs.unity3d.com/2019.1/Documentation/Manual/xr_input.html) but it can easily be adapted to work with the Axis as well. Just attach this to any game object.

Code (CSharp):

1. using System;
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using UnityEngine.Events;
6. using UnityEngine.XR;
7.  
8. namespace Zenva.VR
9. {
10.     public class ButtonController : MonoBehaviour
11.     {
12.         static readonly Dictionary<string, InputFeatureUsage<bool>> availableButtons = new Dictionary<string, InputFeatureUsage<bool>>
13.         {
14.             {"triggerButton", CommonUsages.triggerButton },
15.             {"thumbrest", CommonUsages.thumbrest },
16.             {"primary2DAxisClick", CommonUsages.primary2DAxisClick },
17.             {"primary2DAxisTouch", CommonUsages.primary2DAxisTouch },
18.             {"menuButton", CommonUsages.menuButton },
19.             {"gripButton", CommonUsages.gripButton },
20.             {"secondaryButton", CommonUsages.secondaryButton },
21.             {"secondaryTouch", CommonUsages.secondaryTouch },
22.             {"primaryButton", CommonUsages.primaryButton },
23.             {"primaryTouch", CommonUsages.primaryTouch },
24.         };
25.  
26.         public enum ButtonOption
27.         {
28.             triggerButton,
29.             thumbrest,
30.             primary2DAxisClick,
31.             primary2DAxisTouch,
32.             menuButton,
33.             gripButton,
34.             secondaryButton,
35.             secondaryTouch,
36.             primaryButton,
37.             primaryTouch
38.         };
39.  
40.         [Tooltip("Input device role (left or right controller)")]
41.         public InputDeviceRole deviceRole;
42.        
43.         [Tooltip("Select the button")]
44.         public ButtonOption button;
45.  
46.         [Tooltip("Event when the button starts being pressed")]
47.         public UnityEvent OnPress;
48.  
49.         [Tooltip("Event when the button is released")]
50.         public UnityEvent OnRelease;
51.  
52.         // to check whether it's being pressed
53.         public bool IsPressed { get; private set; }
54.  
55.         // to obtain input devices
56.         List<InputDevice> inputDevices;
57.         bool inputValue;
58.  
59.         InputFeatureUsage<bool> inputFeature;
60.  
61.         void Awake()
62.         {
63.             // get label selected by the user
64.             string featureLabel = Enum.GetName(typeof(ButtonOption), button);
65.  
66.             // find dictionary entry
67.             availableButtons.TryGetValue(featureLabel, out inputFeature);
68.            
69.             // init list
70.             inputDevices = new List<InputDevice>();
71.         }
72.  
73.         void Update()
74.         {
75.             InputDevices.GetDevicesWithRole(deviceRole, inputDevices);
76.  
77.             for (int i = 0; i < inputDevices.Count; i++)
78.             {
79.                 if (inputDevices[i].TryGetFeatureValue(inputFeature,
80.                     out inputValue) && inputValue)
81.                 {
82.                     // if start pressing, trigger event
83.                     if (!IsPressed)
84.                     {
85.                         IsPressed = true;
86.                         OnPress.Invoke();
87.                     }
88.                 }
89.  
90.                 // check for button release
91.                 else if (IsPressed)
92.                 {
93.                     IsPressed = false;
94.                     OnRelease.Invoke();
95.                 }
96.             }
97.         }
98.     }
99. }

 

Hello! Here is my example implementation for buttons input for 6Dof VR Headsets using controllers like the Vive or Rift or WMR. This is from a racing game I was working on. Any feedback/questions would be appreciated.

VRPlayer/Camera Parent Code (Attach only this script to your Camera Parent):

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Events;
5. using UnityEngine.Serialization;
6. using UnityEngine.XR;
7.  
8. [System.Serializable] // Generic Event holding button value
9. public class AButtonEvent : UnityEvent<bool>
10. {
11.     public bool Value { get; set; }
12.  
13.     public void Initialize(bool value, UnityAction<bool> method)
14.     {
15.         Value = value;
16.         AddListener(method);
17.     }
18. }
19.  
20.  
21. public class RacerVR : Racer
22. {
23.     public GameObject LeftAnchor;
24.     public GameObject RightAnchor;
25.  
26.     private HandController _leftController;
27.     private HandController _rightController;
28.  
29.     private UnityEngine.XR.InputDevice _leftDevice;
30.     private UnityEngine.XR.InputDevice _rightDevice;
31.  
32.     // Start is called before the first frame update
33.     void Start()
34.     {
35.         base.Start();
36.  
37.         SetDevices();
38.  
39.         //Initialize Hands
40.         _leftController = LeftAnchor.AddComponent<HandController>();
41.         _rightController = RightAnchor.AddComponent<HandController>();
42.  
43.     }
44.  
45.     // Update is called once per frame
46.     private new void Update()
47.     {
48.         base.Update();
49.  
50.         //Set Tracked Devices
51.         SetDevicePosAndRot(XRNode.LeftHand, LeftAnchor);
52.         SetDevicePosAndRot(XRNode.RightHand, RightAnchor);
53.  
54.         //Set Buttons
55.         UpdateButtonState(_leftDevice, CommonUsages.gripButton, _leftController.GripEvent);
56.         UpdateButtonState(_rightDevice, CommonUsages.gripButton, _rightController.GripEvent);
57.  
58.         UpdateButtonState(_leftDevice, CommonUsages.primary2DAxisClick, _leftController.ClickEvent);
59.         UpdateButtonState(_rightDevice, CommonUsages.primary2DAxisClick, _rightController.ClickEvent);
60.  
61.         UpdateButtonState(_leftDevice, CommonUsages.triggerButton, _leftController.TriggerEvent);
62.         UpdateButtonState(_rightDevice, CommonUsages.triggerButton, _rightController.TriggerEvent);
63.  
64.         UpdateButtonState(_leftDevice, CommonUsages.menuButton, _leftController.MenuEvent);
65.         UpdateButtonState(_rightDevice, CommonUsages.menuButton, _rightController.MenuEvent);
66.     }
67.  
68.     private static void SetDevicePosAndRot(XRNode trackedDevice, GameObject anchor)
69.     {
70.         anchor.transform.localPosition = UnityEngine.XR.InputTracking.GetLocalPosition(trackedDevice);
71.         anchor.transform.localRotation = UnityEngine.XR.InputTracking.GetLocalRotation(trackedDevice);
72.     }
73.  
74.     private static InputDevice GetCurrentDevice(XRNode node)
75.     {
76.         var device = new InputDevice();
77.         var devices = new List<UnityEngine.XR.InputDevice>();
78.         UnityEngine.XR.InputDevices.GetDevicesAtXRNode(node,
79.             devices);
80.         if (devices.Count == 1)
81.         {
82.             device = devices[0];
83.             //Debug.Log($"Device name '{device.name}' with role '{device.role.ToString()}'");
84.         }
85.         else if (devices.Count > 1)
86.         {
87.             Debug.Log($"Found more than one '{device.role.ToString()}'!");
88.             device = devices[0];
89.         }
90.  
91.         return device;
92.     }
93.  
94.     private void UpdateButtonState(InputDevice device, InputFeatureUsage<bool> button,
95.         AButtonEvent aButtonPressEvent)
96.     {
97.         bool tempState;
98.         bool invalidDeviceFound = false;
99.         bool buttonState = false;
100.  
101.         tempState = device.isValid // the device is still valid
102.                     && device.TryGetFeatureValue(button, out buttonState) // did get a value
103.                     && buttonState; // the value we got
104.  
105.         if (!device.isValid)
106.                 invalidDeviceFound = true;
107.  
108.         if (tempState != aButtonPressEvent.Value) // Button state changed since last frame
109.         {
110.             aButtonPressEvent.Invoke(tempState);
111.             aButtonPressEvent.Value = tempState;
112.         }
113.  
114.         if (invalidDeviceFound) // refresh device lists
115.            SetDevices();
116.     }
117.  
118.     private void SetDevices()
119.     {
120.         //Set Controller Devices
121.         _leftDevice = GetCurrentDevice(XRNode.LeftHand);
122.         _rightDevice = GetCurrentDevice(XRNode.RightHand);
123.     }
124.  
125.     private void ShowCurrentlyAvailableXRDevices()
126.     {
127.         var inputDevices = new List<UnityEngine.XR.InputDevice>();
128.         UnityEngine.XR.InputDevices.GetDevices(inputDevices);
129.         foreach (var device in inputDevices)
130.         {
131.             Debug.Log($"Device found with name '{device.name}' and role '{device.role.ToString()}'");
132.         }
133.     }
134.  
135. }

Hand/Controller Code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Events;
5. using UnityEngine.Serialization;
6.  
7. [RequireComponent(typeof(Animator))]
8. public class HandController : MonoBehaviour
9. {
10.  
11.     public bool IsGripPressed;
12.     public bool IsTriggerPressed;
13.     public bool IsMenuPressed;
14.     public bool IsClickPressed;
15.  
16.     // Button Events
17.     public AButtonEvent GripEvent { get; set; }
18.     public AButtonEvent TriggerEvent { get; set; }
19.     public AButtonEvent MenuEvent { get; set; }
20.     public AButtonEvent ClickEvent { get; set; }
21.  
22.     private Animator _animator;
23.  
24.     void Start()
25.     {
26.         InitializeButtons();
27.         _animator = GetComponent<Animator>();
28.  
29.     }
30.  
31.     // Update is called once per frame
32.     void Update()
33.     {
34.      
35.     }
36.  
37.     private void InitializeButtons()
38.     {
39.         (GripEvent = new AButtonEvent()).Initialize(IsGripPressed, OnGripButtonEvent);
40.         (TriggerEvent = new AButtonEvent()).Initialize(IsTriggerPressed, OnTriggerButtonEvent);
41.         (MenuEvent = new AButtonEvent()).Initialize(IsMenuPressed, OnMenuButtonEvent);
42.         (ClickEvent = new AButtonEvent()).Initialize(IsClickPressed, OnClickButtonEvent);
43.     }
44.  
45.     // Button Functions
46.     private void OnGripButtonEvent(bool pressed)
47.     {
48.         IsGripPressed = pressed;
49.         _animator.SetBool("GripAnimation", pressed);
50.  
51.         if (pressed)
52.         {
53.             Debug.Log("Grip Pressed");
54.         }
55.         else
56.         {
57.             Debug.Log("Grip Released");
58.         }
59.     }
60.  
61.     private void OnTriggerButtonEvent(bool pressed)
62.     {
63.         IsTriggerPressed = pressed;
64.         _animator.SetBool("TriggerAnimation", pressed);
65.  
66.         if (pressed)
67.         {
68.             Debug.Log("Trigger Pressed");
69.         }
70.         else
71.         {
72.             Debug.Log("Trigger Released");
73.         }
74.     }
75.  
76.     private void OnMenuButtonEvent(bool pressed)
77.     {
78.         IsMenuPressed = pressed;
79.         if (pressed)
80.         {
81.             Debug.Log("Menu Pressed");
82.         }
83.     }
84.  
85.     private void OnClickButtonEvent(bool pressed)
86.     {
87.         IsClickPressed = pressed;
88.         _animator.SetBool("ClickAnimation", pressed);
89.  
90.         if (pressed)
91.         {
92.             Debug.Log("Click Pressed");
93.         }
94.         else
95.         {
96.             Debug.Log("Click Released");
97.         }
98.     }
99. }

 

Heya interesting thread! Thanks for these examples people!

I have been playing around with the Unity XR SDK since 2018, really happy to see the haptics added to the SDK and the updated input system. Whooohooo!

Could somebody enlighten me when to use a Device feature and when to use an XRNode?

For example:
Device.TryGetFeatureValue(CommonUsages.devicePosition, out pos);
Returns the world position.

And this returns the local position :
pos = UnityEngine.XR.InputTracking.GetLocalPosition(XRNode);

 

I have a question regarding the new XR input system and the Unity UI system. If I have a world space canvas UI and I want to use input from a VR controller to control it (pushing buttons etc.) - is there built-in functionality already to make this happen? I found an older thread by Oculus (https://developer.oculus.com/blog/unitys-ui-system-in-vr/) which talks about subclassing several event system-related classes to make this happen. Is this still required or is there a built-in solution already?

Thanks,

Philip

 

@StayTalm_Unity Thanks for your answer. Just to be sure, we are indeed talking about a "touch+click to use" functionality (not a "laser pointer thing"), right? Is this planned for this year or would you say its more of a 2020 thing?

And, if I wanted to implement this beforehand, is the general idea in the Oculus thread (i.e.subclassing InputModule and the Raycaster classes) still the preferred way to go?

Thanks! Philip

 

Answered here: https://forum.unity.com/threads/unitys-ui-and-xr-input.671893/#post-4498354

 

So just out of curiosity, below is the script I attach to a game object to have it track with the given XRNode:

Code (CSharp):

1. public class XRDeviceTracker : MonoBehaviour
2. {
3.     [SerializeField]
4.     protected UnityEngine.XR.XRNode device;
5.  
6.     void Update()
7.     {
8.         this.transform.localPosition = UnityEngine.XR.InputTracking.GetLocalPosition(device);
9.         this.transform.localRotation = UnityEngine.XR.InputTracking.GetLocalRotation(device);
10.     }
11. }
12.  

It's very simple and clean, and I'm not sure what an equivalent solution is using an InputDevice instead of an XRNode? Any help would be much appreciated.

 

Thank-you for the examples and the quick response!

I tested the examples with Unity 2019.1.1f1 and Unity 2019.2.0a4, The first example works and I can go with that, but the second example produces the following error:

Assets\Scripts\XRTracker.cs(25,22): error CS0117: 'InputDevices' does not contain a definition for 'deviceConnected'

So this looks like it's something very new and not available yet.

I'll check out the TrackedPoseDriver later today. I avoided the XR Legacy Input Helpers package because, you know... it's legacy.

[Update]: Tried the TrackedPoseDriver... it works fine but feels inconsistent with the naming conventions of the InputDevice APIs. For now, I'm going to go with a hybrid of your two examples:

Code (CSharp):

1. public class BasicXRTracker : MonoBehaviour
2. {
3.     //Keep this around to avoid creating heap garbage
4.     static List<InputDevice> devices = new List<InputDevice>();
5.     [SerializeField]
6.     InputDeviceRole role;
7.     InputDevice trackedDevice;
8.  
9.     void OnEnable()
10.     {
11.         Application.onBeforeRender += OnBeforeRender;
12.         GetDevice();
13.     }
14.  
15.     void OnDisable()
16.     {
17.         Application.onBeforeRender -= OnBeforeRender;
18.     }
19.  
20.     void Update()
21.     {
22.         if (trackedDevice.isValid)
23.             TrackToDevice(trackedDevice);
24.         else {
25.             GetDevice();
26.         }
27.     }
28.  
29.     void OnBeforeRender()
30.     {
31.         if (trackedDevice.isValid)
32.             TrackToDevice(trackedDevice);
33.     }
34.  
35.     void GetDevice()
36.     {
37.         InputDevices.GetDevicesWithRole(role, devices);
38.         if (devices.Count > 0) {
39.             trackedDevice = devices[0];
40.         }
41.     }
42.  
43.     void TrackToDevice(InputDevice trackedDevice)
44.     {
45.         Vector3 position;
46.         if (trackedDevice.TryGetFeatureValue(CommonUsages.devicePosition, out position))
47.             this.transform.localPosition = position;
48.  
49.         Quaternion rotation;
50.         if (trackedDevice.TryGetFeatureValue(CommonUsages.deviceRotation, out rotation))
51.             this.transform.localRotation = rotation;
52.     }
53. }

Thanks for the help!

 

@addent, thanks for asking and @StayTalm_Unity, thanks for providing an answer regarding the new APIs. This is the type of support that really makes a difference on the forums. I would also suggest adding this to the docs.

If it's not too much to ask, might I tempt you into providing a TrackedPoseDriver "best practise" usage example as well? It is immensely helpful for us "users" to see the API applied by those who made it, just to understand the intended usage patterns.

Philip

 

@StayTalm_Unity I got around to checking the TrackedPoseDriver class now. I was surprised that I had to enable a package called "XR Legacy Input Helpers" for it to be available. I understood from your post above that the TrackedPoseDriver is in fact what we should use going forward, so why does the package have "Legacy" in its name?

 

Cool. Thanks for info and great job keeping active on the forum! It is very much appreciated.

 

I've submitted a bug report as well, but I thought I'd mention it here too...

The InputDevice.TryGetFeatureUsages() reports incorrect information with an HTC Vive.
In particular, it reports that the various "Finger" inputs exists when they do not.

Ideally this would be fixed to be accurate. I'm trying to avoid writing code specific to each manufacturer's controllers and the TryGetFeatureUsages() would have been a nice solution to achieve it.

An example of incorrect reporting would be:

Device: OpenVR Controller(Vive. Controller MV) - Right
Role: RightHanded
Features:
Primary2DAxis
Trigger
Grip
Secondary2DAxis <-- Not True! This feature does not exist on Vive Controllers!
IndexFinger <-- Not True! This feature does not exist on Vive Controllers!
MiddleFinger <-- Not True! This feature does not exist on Vive Controllers!
RingFinger <-- Not True! This feature does not exist on Vive Controllers!
PinkyFinger <-- Not True! This feature does not exist on Vive Controllers!
PrimaryButton
SecondaryButton
GripButton
Primary2DAxisClick
TriggerButton
Primary2DAxisTouch
DevicePosition
DeviceRotation
DeviceVelocity
DeviceAngularVelocity
TrackingState
IsTracked

The script I used to test what it was reporting is:

Code (CSharp):

1. using System.Collections.Generic;
2. using UnityEngine;
3. using UnityEngine.XR;
4.  
5. public class XRFeatureCheck: MonoBehaviour
6. {
7.     static List<InputDevice> devices = new List<InputDevice>();
8.     static List<InputFeatureUsage> featureUsages = new List<InputFeatureUsage>();
9.  
10.     void Update()
11.     {
12.         InputDevices.GetDevices(devices);
13.  
14.         string logString = "";
15.  
16.         foreach (var device in devices)
17.         {
18.  
19.             logString += "\n\n-------------------------------------------------------";
20.             logString += "\nDevice: " + device.name;
21.             logString += "\nRole: " + device.role;
22.             logString += "\nFeatures: ";
23.  
24.             var featuresFound = device.TryGetFeatureUsages(featureUsages);
25.  
26.             if (!featuresFound)
27.             {
28.                 logString += "\n   No Features Found.";
29.             }
30.             else
31.             {
32.                 foreach (var f in featureUsages)
33.                 {
34.                     logString += "\n   " + f.name;
35.                 }
36.             }
37.         }
38.  
39.         Debug.Log(logString);
40.  
41.     }
42. }
43.  

[EDIT]
bug report here...
https://issuetracker.unity3d.com/is...-features-that-are-not-in-the-vive-controller

Thanks guys!

 

Well that's disappointing to hear. If it is not going to report reliable and accurate information, then there's really not much point in using it. Oh well, that's the way the cookie crumbles sometimes. I'll just add my own controller-specific logic about feature availability for now. It's still better than setting up the old input system for everything. Thanks for letting us know.

On a side note, is this stuff based on the OpenXR specification? It looks like it has fairly well defined mechanism to report features in section 6, "Semantic Paths". It even specifically states the interaction profiles for all the common controllers as XrPaths.

https://www.khronos.org/registry/OpenXR/specs/0.90/html/xrspec.html#semantic-path
https://www.khronos.org/registry/Op...rspec.html#semantic-path-interaction-profiles

It then uses those XrPaths in its ActionSet system to handle the input-to-action mapping.

https://www.khronos.org/registry/OpenXR/specs/0.90/html/xrspec.html#input

I guess what I'm getting at is that yes, somewhere at some level there must be controller-specific information. I had hoped that this would be "under the hood" in Unity's XR.InputDevices API, but sounds like that isn't really the case.

My hope is that this will all get worked out with the new Input System once it's out of preview, and it will in-fact hide controller specifics and have something similar to the InputDevice.TryGetFeatureUsages() that reports accurately.

Anyhow - thank's again for the update. I have to move on from worrying about inputs for now, but I will continue to follow this thread. It's interesting stuff.

 

Could you please explain the proper way to identify multiple devices types with the same XRNode or InputDeviceRole?

I've not been able to locate a way to reconcile the two. InputTracking.GetNodeStates will return a list of all tracking XRNodeStates each with a unique ID. But it seems InputDevices.GetDevicesAtXRNode can return multiple devices with no way to correlate them to their XRNodeState.

For example, in a typical Vive setup with two Lighthouses, called InputTracking.GetNodeStates will return two unique XRNodeStates with nodeType TrackerReference (one for each LightHouse) but InputDevices.GetDevicesAtXRNode(XRNode.TrackerReference) will return two devices in the list with no way to match them to their corresponding XRNodeState.

Similarly, InputDevices.GetDevicesWithRole(InputDeviceRole.TrackingReference, devices) will also return two devices with no way to associate them to an XRNodeState.

Thank you for any help you can provide!

 

Maybe im missing something, but im using the TryGetFeatureValue to detect if the Trigger was pressed, im passing CommonUsages.triggerButton.
This returns true as long as the trigger is pressed, is there any API to check if the trigger was pressed during this frame and then return false for all following frames even if the trigger is still down?

Something similar can be down with the "PC" input for example Input.GetButton vs Input.GetButtonDown or Input.GetMouseButtonDown vs Input.GetMouseButton.

A workaround would be to store the state myself and update the variable every frame but a "TryGetFeatureDown" or something like that would be helpful or is that already possible and im just doing it wrong?

Edit: There seems to be a additional TryGetFeatureValue with a DateTime "time" parameter, I can't find any documentation about it, what does the time parameter do?

Edit2: Additional question about the commonUsages.triggerButton, on some controllers (for example Oculus Touch) the "button" feels way too sensitive, I "touch" the trigger and the triggerButton already returns true, is there a way to change the axis value which triggers the "button"?
As a current workaround I use the trigger float value instead and check if the value is a certain limit to trigger a "click", but there should be a way to "fix" the commonUsages.triggerButton sensitivity, otherwise it's not really useful.

 

@StayTalm_Unity
We just tried using the individual finger features (middleFinger, ringFinger, etc.) on the new index (knuckles) controllers, but the returned values are always 0. Is this an issue of these feature not *really* being available on the index controller yet, or is this a bug?
Or are we doing something wrong? We're on Unity 2019.1, the controllers are working fine otherwise and other XR features, like trigger and buttons, seem to work fine too. Also, the grip feature appears to always return either 0 or 1 and not the "weighted average" the docs are speaking of.

 

Im having an issue where:

Code (CSharp):

1. if (device.TryGetFeatureValue(CommonUsages.triggerButton, out trigger) && trigger)

is firing ok on vive controller but on oculus Quest it is fired as soon as the trigger is even touched not pressed. Is there a way to return how far along the axis it is pressed? All I find in docs is trigger and triggerbutton, none of which return me the axis value.


@StayTalm_Unity

 

Heya @StayTalm_Unity,

Thanks for your support in this thread I had another question, not sure if this is part of the input system new or otherwise. But is there a way to set the tracking origin type to either eyeLevel or floorLevel?

 

Heya Tom!

Awesome thanks for the quick reply and info. I'll try those asap!

Best,
Daniel

 

We're currently on Unity 2019.1 with our project, and support SteamVR, Oculus SDK, PSVR, maybe Windows MR and one more esoteric VR/AR-platform that has its own SDK. I'm about to port over to SteamVR Input 2.0 and am hoping to be able to feed input captured from other systems into that so that I can code against one single API (also, we'll be using the SteamVR Interaction system, and support Valve Index controllers). We also have some quite elaborate generic tracker support with automatic role assignment and things like that.

Ideally, at some point I would like to only have SteamVR Input 2.0 and Unity's generic XR input system. One problem with action-based Input systems is that it makes supporting different systems a lot more complicated.

Would you recommend waiting with porting to the Unity XR Input system until it's more stable (e.g. when 2019.2/2019.3 is released) ... or actually, maybe even until the new Input System (with actions) is more stable?

 

Not sure if that's a bug or not, I noticed when the oculus dekstop app is closed, while trying to start play mode in the unity editor, it will not render in VR ( the heads up display screen is completely black ) but it will track the headset and the controllers positions and rotation and render on the game tab.

 

I have noticed that I get poor responsiveness with the XRInput system and buttons in scroll rects for unity.

I was wondering if you could verify.

Basically I have a scroll rect of many buttons, I want to select a button by pulling the trigger
like this:


I have tried both THIS:

Code (CSharp):

1.         bool triggerPulled;
2.  
3.         if (controller.TryGetFeatureValue(CommonUsages.triggerButton, out triggerPulled) && triggerPulled)
4.         {
5.             if (TriggerPressed != null)
6.             {
7.                 TriggerPressed();
8.             }
9.  
10.         }

AND this

Code (CSharp):

1. bool triggerPulled;
2.  
3.         if (controller.TryGetFeatureValue(CommonUsages.trigger, out trig))
4.         {
5.              Debug.Log("CommonUsages.trigger button is pressed trigger " + trig);
6.         }
7.  
8.         triggerPulled = (trig == 1);

To trigger this

Code (CSharp):

1.         if (updateCurveUIInput)
2.         {
3.             CurvedUIInputModule.CustomControllerButtonState = triggerPulled;
4.         }

Most the time the button will highlight as though pressed but the command isn't invoked.

Usually you have to pull the trigger slowly to get a proper selection.

I fear this is an inherent problem of scroll rect. Is seems that if you move the cursor the slightest bit while pressing a button in the scroll rect it will think you are moving the scroll rect and consume the event.

Can you help?

Anthony

 

There are a couple solttion I found

1) increase the dragThreshold on the event system

2) add EventTriggers for BeginDrag/Drag/EndDrag on the button to consume the drag event.

 

Hi, SteamVR has updatedto 1.6.10 on 30 JUL
https://steamcommunity.com/games/250820/announcements/detail/1603763772826636893

These changes breaks the

Code (csharp):

1. Input.GetAxis(axis9or10)

and also

Code (CSharp):

1. device.TryGetFeatureValue(CommonUsages.trigger, out float triggerValue)

which is the vive controller trigger button. Previously it would report 0.0-1.0. Now it only reports 0.0-0.2, and then jump to 1.0 if >0.2.

 

I just got a Rift S and notice that the TriggerButton behaives differantly than Vive and Go.

This code

Code (CSharp):

1. if (controller.TryGetFeatureValue(CommonUsages.triggerButton, out triggerPulled) && triggerPulled)
2.  

On a Vive and Go only executes when the trigger is pulled past midway point.

On a Rift S, if the trigger is touched ever so slightly, the value will be true. Also on the Rift S the code

Code (CSharp):

1.         if (controller.TryGetFeatureValue(CommonUsages.trigger, out trig))
2.        

The trig value has a delayed reaction, and after you release a pulled in trigger the trig value can and will be greater than 0, usually a value greater than 1 .

So what is the official Unity way of interacting with with trigger on Rift S?


I think the docs should be changed to show something like this

Code (CSharp):

1.         triggerPulled = false;
2.         advancedTriggerPull = false;
3.         // Recommended new way
4.         if (controller.TryGetFeatureValue(CommonUsages.triggerButton, out triggerPulled) && triggerPulled)
5.         {
6.         }
7.  
8.         // Another way to do it
9.         float trig = 0;
10.         if (controller.TryGetFeatureValue(CommonUsages.trigger, out trig))
11.         {
12.  
13.         }
14.  
15.         advancedTriggerPull = triggerPulled && (trig > 0.5);

 

@vincismurf, I also noticed that slightly touching the trigger will set triggerButton to true. Your workaround does the trick, maybe it would be best to have both triggerButton and triggerTouch ( similar to how primaryTouch and primaryButton is working right now ) ??

This makes it confusing when accessing similarly named input features. Now consider that the axis grip will fire CommonUsages.gripButton when its pressed ~25% down, unlike the CommonUsages.primaryButton and others alike

So instead i implemented a custom class with the following input features added

Code (CSharp):

1. CustomUsages.triggerButton
2. CustomUsages.triggerTouch
3. CustomUsages.gripTouch
4. CustomUsages.gripButton

that will fire the button when its at 50% or more
and fire the touch when its 0.5% or more
( not sure how the same method applies to different headsets, since i only got the Rift S )

 

How did you implement a custom InputFeatureUsage?

 

@R1PFake with a TryGetValue wrapper, also its possible to create new input features:

Code (CSharp):

1. new InputFeatureUsage<bool>("_TriggerTouch");

Here is the bit im using to handle this input:

Code (CSharp):

1.         public static class Buttons
2.         {
3.             public static InputFeatureUsage<bool> primaryButton         = CommonUsages.primaryButton;
4.             public static InputFeatureUsage<bool> primaryTouch          = CommonUsages.primaryTouch;
5.             public static InputFeatureUsage<bool> secondaryButton       = CommonUsages.secondaryButton;
6.             public static InputFeatureUsage<bool> secondaryTouch        = CommonUsages.secondaryTouch;
7.             public static InputFeatureUsage<bool> gripButton            = new InputFeatureUsage<bool>("_Grip_Button");
8.             public static InputFeatureUsage<bool> gripTouch             = new InputFeatureUsage<bool>("_Grip_Touch");
9.             public static InputFeatureUsage<bool> triggerButton         = new InputFeatureUsage<bool>("_Trigger_Button");
10.             // Oculus Rift S - this is actually the trigger touch and it works very well
11.             public static InputFeatureUsage<bool> triggerTouch          = CommonUsages.triggerButton;
12.             // public static InputFeatureUsage<bool> triggerButton         = new InputFeatureUsage<bool>("_Trigger_Touch");
13.             public static InputFeatureUsage<bool> menuButton            = CommonUsages.menuButton;
14.             public static InputFeatureUsage<bool> primary2DAxisClick    = CommonUsages.primary2DAxisClick;
15.             public static InputFeatureUsage<bool> primary2DAxisTouch    = CommonUsages.primary2DAxisTouch;
16.         }
17.  
18.         bool GetCustomButtonValue( InputFeatureUsage<bool> usage )
19.         {
20.             float value = 0f;
21.  
22.             if( usage.name.Contains("_Grip") )      value = GetAxisGrip();
23.             if( usage.name.Contains("_Trigger") )   value = GetAxisTrigger();
24.        
25.             if( usage.name.Contains("_Touch") )       return value >= MinValue_Touch;
26.             if( usage.name.Contains("_Button") )      return value >= MinValue_Button;
27.  
28.             return false;
29.         }

Code (CSharp):

1.         static List<InputFeatureUsage<bool>> CustomButtons = new List<InputFeatureUsage<bool>>
2.         {
3.             Buttons.gripButton,
4.             Buttons.gripTouch,
5.             Buttons.triggerButton,
6.             Buttons.triggerTouch,
7.         };
8.  
9. // ...
10. if( CustomButtons.Contains( input_device ) )
11. {
12.     is_pressed = GetCustomButtonValue( input_device );
13. }
14. // ...

PS. I got few utils and snippets for UnityXR, let me know if anyone is interested and i will share it on github.