Implementing locatable camera shader code

What I'm trying to do is take a photo, pick a pixel location in the photo to place a hologram, then actually place the hologram in the corresponding 3D location. I found a tutorial for this here under "Pixel to Application-specified Coordinate System": https://developer.microsoft.com/en-us/windows/holographic/locatable_camera. However, the code for the translation between the pixel coordinate to real world coordinate is in shader code. I created a custom shader and...

Implementing locatable camera shader code