Improving the AVANGO VR/AR framework

Our open source VR/AR framework AVANGO has been used in several of our R&D projects since 1996. We recently started the development of the next generation version called AVANGO NG as the development of external dependencies stalled. We present the design criteria for the vintage system and the new one, what lessons we learned from implementing and using the first version, and how that influenced our design decisions. We cover the internal system design as well as the user visible parts of the framework.