How can I link MainView with HMD and a 3d node?

[Salvar]

Hi all,

I've hit a technical snag in the research project I'm currently working on.

I have a virtual environment, containing a 3d node (car). The car is controlled by a custom action class I wrote for it.

To keep the viewpoint in tandem with the car, I have viz.MainView linked with the car. Everything works well and good. I move the car, mainview moves with it.

Now, I want to add HMD head-tracking into the mix. And that seems to be tricky. If I link the mainview with the HMD tracker after linking to the car, the car link breaks and it doesn't move with the car anymore. And vice versa.

How can I get these two things to work together?