#Sam's "recall" notes (VR, Quest, Exer-Gaming)

1 messages · Page 1 of 1 (latest)

cunning crypt
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I'm currently up-skilling to go from the Unity Associate Programmer cert (which I've had for 3 years) to the Professional cert.

"Recall notes" are less tutorial, and more vlog/memo for me to remember what I was working on.

https://www.youtube.com/@SamHalperin [recall notes from this year are the first playlist]

YouTube
Sam Halperin

Hi, I'm American, gen-X, software developer interested in social-VR and VR exercise gaming. On this channel I document past and current projects as well as write a bit of music and the occasional vlog.

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https://www.youtube.com/watch?v=cLOogOOgm7g&list=PLj9woYh_-gzcqCbh_lKRwB1bItGydyjKH&index=8

YouTube
Sam Halperin
Meta Quest VR / Unity - Video With Alpha Channel - Part I, Prep.

Part 2: https://www.youtube.com/watch?v=2NlmsGS60DU

ffmpeg commands

[Extract the alpha channel from a Prorez 4444 video]
ffmpeg -i input.mov -vf "alphaextract" -c:v libx264 -pix_fmt yuv420p alpha.mp4

[Extract the RGB channel]
ffmpeg -i input.mov -vf format=rgb24 -c:v libx264 -pix_fmt yuv420p rgb.mp4

[Dump out the size of the video using ffp...

▶ Play video
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https://www.youtube.com/watch?v=7emp3t3-S60&list=PLj9woYh_-gzcqCbh_lKRwB1bItGydyjKH&index=11

YouTube
Sam Halperin
2025-06-12 'Real World Texture Scale' A.K.A. 'Physical Coverage'

When you are describing a texture, there is a piece of metadata that I'd want, that I don't see on sites like texture.com. That is, what's the actual scale, assuming it's a photographic texture, of the thing being photographed. If it's a brick wall, does the texture include 10 feet of wall or 12 inches? This is different than texture resoluti...

▶ Play video
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https://www.youtube.com/watch?v=45YmwumTswc&list=PLj9woYh_-gzcqCbh_lKRwB1bItGydyjKH&index=13

YouTube
Sam Halperin
2025-06-17 Hello GLB - no more FBX PATH antics for textures and ma...

'.glb' is the binary format of '.glt'. Unlike FBX it is able to embed materials and textures in a way that exporting from Blender and importing into Unity is seamless.

See this: https://docs.unity3d.com/Packages/com.unity.cloud.gltfast@6.0/manual/index.html

Or this:
https://github.com/atteneder/glTFast

▶ Play video
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https://www.youtube.com/watch?v=GCdu2eGy1Hc&list=PLj9woYh_-gzcqCbh_lKRwB1bItGydyjKH&index=15

YouTube
Sam Halperin
2025-06-18 Origin *orientation* and *translation* reset and implica...

TLDR

  • orientation and translation reset is left thumb button, long press (meta button, formerly oculus button)
  • feature is built into operating system, no implementation necessary in Unity
  • Occasional reset ameliorates drift. Even losing 20% of a small Guardian is significant in exer-gaming (exercise gaming)

*Apologies for hoarse voice, I h...

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