RuView: Off-Axis Projection Basis Fix
A single focused pull request, PR #2297, corrects off-axis screen math to stay orthonormal with imperfect physical measurements. There is no broader pattern — this projection reliability fix is the day's highest-impact change.
Duration: PT2M6S
Episode overview
This episode is a short developer briefing from RuView.
It explains recent repository work in plain language.
- Show: RuView
- Published: 2026-10-19T06:04:40Z
- Audio duration: PT2M6S
Transcript excerpt
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Good morning, it's Monday, October 19th, 2026, and this is RuView.
Today's activity is narrow — a single focused fix, but one that addresses projection correctness at the foundation.
Pull request 2297, from R M N O 21, tackles the off-axis screen basis used in generalized perspective projection. The specification, described in the Kooima 2008 method referenced in the project decision record, requires an exact right-handed orthonormal basis — right, up, and normal vectors that are perpendicular…
Previously, the screen setup derived the right vector from one screen edge and the up vector from the other, then built the normal from their cross product. That works when measured corners form a perfect right angle, but real physical setups rarely do. Calibration tolerances and measurement noise can leave the two…
That small skew matters. If the basis is not orthonormal, the resulting projection can carry shear or orientation error into every frame rendered for that screen, undermining reliability for tracked, multi-screen or immersive displays.
The fix in pull request 2297, linked to issue 1629, guarantees an orthonormal basis even when the input corner measurements are skewed. For…
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