A few months ago, I realized we go back again and again to the same Excel spreadsheets for some VR calculations. For instance, if the field of view is 90 degree diagonal and the aspect ratio is 16:9, what is the horizontal field of view? If using a goggle is like watching a 70 inch TV from 6 feet, what does that say about the field of view?
To help with this, the Sensics team decided to create a simple iPhone app (Android version coming soon) that helps with these calculations. This app is now available as a free download from iTunes. Think about it as public service for the VR community.
In it’s current beta form, the app provides several useful conversions:
- TV screen size to/from goggle field of view
- Screen size and aspect ratio to/from field of view
- Quaternion to/from Euler angles