Method UpdateTrackerDesc

Revive/Session.cpp:241–282

}

void ovrHmdStruct::UpdateTrackerDesc()
{
	const bool spoofSensors = UseHack(HACK_SPOOF_SENSORS);
	vr::TrackedDeviceIndex_t trackers[vr::k_unMaxTrackedDeviceCount];
	uint32_t count = 3;

	if (!spoofSensors)
		count = vr::VRSystem()->GetSortedTrackedDeviceIndicesOfClass(vr::TrackedDeviceClass_TrackingReference, trackers, vr::k_unMaxTrackedDeviceCount);

	// Only update trackers we haven't seen yet, this ensures we don't run into concurrency errors
	for (uint32_t i = TrackerCount; i < count; i++)
	{
		ovrTrackerDesc& desc = TrackerDesc[i];

		if (spoofSensors)
		{
			desc.FrustumHFovInRadians = OVR::DegreeToRad(100.0f);
			desc.FrustumVFovInRadians = OVR::DegreeToRad(70.0f);
			desc.FrustumNearZInMeters = 0.4f;
			desc.FrustumFarZInMeters = 2.5f;
		}
		else
		{
			vr::TrackedDeviceIndex_t index = trackers[i];

			// Calculate field-of-view.
			float left = vr::VRSystem()->GetFloatTrackedDeviceProperty(index, vr::Prop_FieldOfViewLeftDegrees_Float);
			float right = vr::VRSystem()->GetFloatTrackedDeviceProperty(index, vr::Prop_FieldOfViewRightDegrees_Float);
			float top = vr::VRSystem()->GetFloatTrackedDeviceProperty(index, vr::Prop_FieldOfViewTopDegrees_Float);
			float bottom = vr::VRSystem()->GetFloatTrackedDeviceProperty(index, vr::Prop_FieldOfViewBottomDegrees_Float);
			desc.FrustumHFovInRadians = (float)OVR::DegreeToRad(left + right);
			desc.FrustumVFovInRadians = (float)OVR::DegreeToRad(top + bottom);

			// Get the tracking frustum.
			desc.FrustumNearZInMeters = vr::VRSystem()->GetFloatTrackedDeviceProperty(index, vr::Prop_TrackingRangeMinimumMeters_Float);
			desc.FrustumFarZInMeters = vr::VRSystem()->GetFloatTrackedDeviceProperty(index, vr::Prop_TrackingRangeMaximumMeters_Float);
		}
	}

	// Update the tracker count, this also serves as a memory barrier for the array
	TrackerCount = count;
}