EVRControllerAxisType enumeration incorrect for Vive DK1

[bmwesting]

Experimental usage is showing that the enumerations appear to be named incorrectly. According to OpenVR.h:

/** Identifies what kind of axis is on the controller at index n. Read this type 
* with pVRSystem->Get( nControllerDeviceIndex, Prop_Axis0Type_Int32 + n );
*/
enum EVRControllerAxisType
{
    k_eControllerAxis_None = 0,
    k_eControllerAxis_TrackPad = 1,
    k_eControllerAxis_Joystick = 2,
    k_eControllerAxis_Trigger = 3, // Analog trigger data is in the X axis
};

However, in using the Vive DK1 controller, I see: k_eControllerAxis_None reporting the touchpad axis values, and k_eControllerAxis_TrackPad reporting the trigger values.

Perhaps this is a driver-side issue?

[vilya]

I just ran into exactly the same problem with OpenVR 1.0.6 and the consumer version of the Vive.

Just like for @bmwesting, after I call IVRSystem::GetControllerState(deviceIdx, &state, sizeof(state)), state.rAxis[k_eControllerAxis_None] reports the trackpad position and state.rAxis[k_eControllerAxis_TrackPad] reports the trigger value.

[echeese]

Those enums are returned by the tracked property methods to determine what type of input is attached to each axis.

For example, you can loop over the axis like so:

for(uint32_t i = 0; i < vr::k_unControllerStateAxisCount; i++) {
    vr::EVRControllerAxisType type = vr::VRSystem()->GetInt32TrackedDeviceProperty(deviceId, Prop_Axis0Type_Int32 + i);
    cout << "Axis " << i << " type: " << vr::VRSystem()->GetControllerAxisTypeNameFromEnum(type) << endl;
}

Will output something like:

Axis 0 type: k_eControllerAxis_TrackPad
Axis 1 type: k_eControllerAxis_Trigger

Though obviously this will depend on the controller you are using.

If you really want to hard code the axis like that, you could do something like this:

state.rAxis[vr::k_EButton_SteamVR_Touchpad-vr::k_EButton_Axis0]
state.rAxis[vr::k_EButton_SteamVR_Trigger-vr::k_EButton_Axis0]

[vilya]

Oh, that makes sense. Thank you!