Method GetPose

samples/drivers/drivers/simplehmd/src/hmd_device_driver.cpp:147–182

----------------------------------------------------------------------------- Purpose: This is never called by vrserver in recent OpenVR versions, but is useful for giving data to vr::VRServerDriverHost::TrackedDevicePoseUpdated. -----------------------------------------------------------------------------

// but is useful for giving data to vr::VRServerDriverHost::TrackedDevicePoseUpdated.
//-----------------------------------------------------------------------------
vr::DriverPose_t MyHMDControllerDeviceDriver::GetPose()
{
	// Let's retrieve the Hmd pose to base our controller pose off.

	// First, initialize the struct that we'll be submitting to the runtime to tell it we've updated our pose.
	vr::DriverPose_t pose = { 0 };

	// These need to be set to be valid quaternions. The device won't appear otherwise.
	pose.qWorldFromDriverRotation.w = 1.f;
	pose.qDriverFromHeadRotation.w = 1.f;

	pose.qRotation.w = 1.f;

	pose.vecPosition[ 0 ] = 0.0f;
	pose.vecPosition[ 1 ] = sin( frame_number_ * 0.01 ) * 0.1f + 1.0f; // slowly move the hmd up and down.
	pose.vecPosition[ 2 ] = 0.0f;

	// The pose we provided is valid.
	// This should be set is
	pose.poseIsValid = true;

	// Our device is always connected.
	// In reality with physical devices, when they get disconnected,
	// set this to false and icons in SteamVR will be updated to show the device is disconnected
	pose.deviceIsConnected = true;

	// The state of our tracking. For our virtual device, it's always going to be ok,
	// but this can get set differently to inform the runtime about the state of the device's tracking
	// and update the icons to inform the user accordingly.
	pose.result = vr::TrackingResult_Running_OK;

	// For HMDs we want to apply rotation/motion prediction
	pose.shouldApplyHeadModel = true;

	return pose;
}

void MyHMDControllerDeviceDriver::MyPoseUpdateThread()
{