Trigger axis value is always 0

As far as I understood trigger position should be inside of pControllerState as one of the axis.

But when I run this program:

import openvr

openvr.init(openvr.VRApplication_Background)

while True:
    print()

    result, pControllerState, pTrackedDevicePose = openvr.VRSystem().getControllerStateWithPose(1,
                                                                                          openvr.TrackingUniverseSeated,
                                                                                            )
    for i in pControllerState.rAxis:
        print(i.x, i.y)

I get only zeroes, am I doing something wrong? (Edit - I had init inside loop)

[mdovgialo]

I had function arguments mixed up. As you can see:

def getControllerStateWithPose(self, eOrigin, unControllerDeviceIndex, unControllerStateSize=sizeof(VRControllerState_t)):

the first one is the tracking universe id, the seconds is the device index and I did it vice versa.

But this function introduced a little lag in posing information, so I don’t use it. You can see minimal example to get axis: https://github.com/mdovgialo/steam-vr-wheel/blob/master/steam_vr_wheel/test.py

I’ve found, that it’s better to get poses like that:

vrsystem = openvr.VRSystem()
poses_t = openvr.TrackedDevicePose_t * openvr.k_unMaxTrackedDeviceCount
poses = poses_t()
vrsystem.getDeviceToAbsoluteTrackingPose(openvr.TrackingUniverseSeated, 0, len(poses), poses)

And then get controller state for a controller:

vrsys = openvr.VRSystem()
result, pControllerState = vrsys.getControllerState(controller_id)
trigger = pControllerState.rAxis[1].x
trackpadX = pControllerState.rAxis[0].x
trackpadY = pControllerState.rAxis[0].y

Controller_id can be any number from 0 to 15, so you have to identify controllers using something like this:

def get_controller_ids():
    vrsys = openvr.VRSystem()
    for i in range(openvr.k_unMaxTrackedDeviceCount):
        device_class = vrsys.getTrackedDeviceClass(i)
        if device_class == openvr.TrackedDeviceClass_Controller:
            role = vrsys.getControllerRoleForTrackedDeviceIndex(i)
            if role == openvr.TrackedControllerRole_RightHand:
                 right = i
            if role == openvr.TrackedControllerRole_LeftHand:
                 left = i
return left, right

[matEhickey]

vr_system = openvr.init(openvr.VRApplication_Background)
result, pControllerState = openvr.VRSystem().getControllerState(openvr.TrackedControllerRole_LeftHand)
trigger = pControllerState.rAxis[1].x
trackpadX = pControllerState.rAxis[0].x
trackpadY = pControllerState.rAxis[0].y
print("ok : "+str(result))
print("trigger : "+str(trigger))
print("trackpadX : "+str(trackpadX))
print("trackpadY : "+str(trackpadY))

These value always remain at 0.0, except for result, that always stay at one, even if the controller is shutdown.

(Windows 10, openvr 1.0.1201)