Show HN: The iPhone Duo fold effect on any Windows laptop (winduo.baselashraf.com)

Basic phase correlation, works on my bad webcam. No need for fancy hinge angle encoders, all you need is some computer vision.

I open sourced it just like all my other projects.

Let me know what you think!

Using webcam image shift as the missing hinge sensor is neat; fifteen pixels per degree gives the shader far more signal than I expected.