iiinova — where your digital self keeps evolving

OwenTheProgrammer @owentheprogrammer.bsky.social · 28/09/2026

yet another magic data texture I had to create RGBA8_UNorm 16x16 (z-order) 40 pixels left, all for some damn lightning

OwenTheProgrammer @owentheprogrammer.bsky.social · 27/09/2026

ah yes, first image is without the IgnoreProjector tag, second is with. I cant recall if this fucks with other things though :/

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OwenTheProgrammer @owentheprogrammer.bsky.social · 20/09/2026

juuuust in case you were curious, these are my solutions to the width, height, and centroid of the Henyey-Greenstein Phase Function. I was trying to reparameterize it into a linear transform for reasons

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OwenTheProgrammer @owentheprogrammer.bsky.social · 16/09/2026

light irradiance is actually quite easy btw, its just *rest* thats hard.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 15/09/2026

Literally half my notes are like this lol

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OwenTheProgrammer @owentheprogrammer.bsky.social · 14/09/2026

im familiar with that brand :3 first time ive heard it out in the wild!

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OwenTheProgrammer @owentheprogrammer.bsky.social · 08/09/2026

Found yet another project that I never had enough time to finish

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OwenTheProgrammer @owentheprogrammer.bsky.social · 28/08/2026

Yo, im fuckin sick of dragging a bunch of things around in large heirarchies, so I made a tool in like ten minutes. Select all the shit you want, then right click some other game object, and "Reparent to Selection." I havent tested this, but it works so far lol

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OwenTheProgrammer @owentheprogrammer.bsky.social · 07/08/2026

you know I find a certain type of beauty in doing things "well" in the sense of graphics. Like this shit lowkey dope looking as hell XD

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OwenTheProgrammer @owentheprogrammer.bsky.social · 07/08/2026

Oh my god I figured out how to get blender orientations to work with unity. Do everything like you would in blender, but export with (image 1) then on the UNITY SIDE, enable (image 2) and apply. magically coordinates and rotations are the SAME.

Image depicting blender FBX export settings, with Apply Scalings set to FBX All, Forward set to Y Forward, and Up set to Z Up.

Image depicting Bake Axis Conversion enabled in the FBX importer settings on Unity.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 25/07/2026

oh lmao alright how to get a 1K x 1K normal down to 37kb apperantly do this (image) and colour pick a spot in your normal where its for sure flat. For me that was (0.50001, 0.50656, 0.99991) which youll want this to be pixel perfect for the png compression to do its job.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 24/07/2026

huh. turns out dithering doubles the size of your normals if you export from blender.. good to know.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 19/07/2026

I always see some crazy shit when im trying to do some outlandish stuff lol

Attempt to reconstruct mesh face normals with a very colourful mistake

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OwenTheProgrammer @owentheprogrammer.bsky.social · 10/07/2026

Spent the pass few days trying to make a PS1 gpu emulator as faithfully as possible. Still trying to figure out how theyd do the rasterization in hardware with fixed point math (the GTE is documented far more than the GPU is) and of course im curious if this will work with VR projection matrices :3

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OwenTheProgrammer @owentheprogrammer.bsky.social · 25/06/2026

I seem to have walked my ass through a shower thought into a long long month. yes this is reconstructed entirely from the depth buffer, nothing else, not even a grabpass.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 09/06/2026

im going to verify all this work is correct and put it into LaTeX of course

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OwenTheProgrammer @owentheprogrammer.bsky.social · 09/06/2026

yet another one of those "damn I really hope I didnt screw anything up XD" types of problems.. Reducing the Perspective-N-Point design matrix through partitioned low-rank approximation (EYM). The original 2N x 12 SVD reduced to 2N x 4, the rest is back substitution under x = (A A+)x + (I - A A+)x

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OwenTheProgrammer @owentheprogrammer.bsky.social · 02/06/2026

oh my god the hlsl tables are an XY selection table. that took me months to figure out..

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OwenTheProgrammer @owentheprogrammer.bsky.social · 02/06/2026

fun fact, if you go through the work to derive the quadratic equation, the point where you convert the sqrt(b^2 - 4ac / (4a^2)) is often factored out as sqrt(b^2 - 4ac) / 2a, but if you want the +sqrt to be the larger root, and the -sqrt to be the smaller root, you need this instead.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 22/04/2026

you ever just store a 64x64x32 texture3D in a single 32x32 RGBAFloat texture?

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OwenTheProgrammer @owentheprogrammer.bsky.social · 21/04/2026

(obvious flashing light warning) I figured id make a debug shader for this wack ass processor layout and even for 16x16, theres a lot of data. Each bar represents a decoded value of some kind.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 03/04/2026

Redid my error function approximation for really no reason lol but I got the deviation terms down even more! it also doesnt die past like 14.. so thats a bonus.. For anyone curious why the erf(x) function is useful, erf(x) = 2/sqrt(pi) * int_0^x{e^{-t^2} dt}

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OwenTheProgrammer @owentheprogrammer.bsky.social · 02/04/2026

figured I'd relay my current list of min and max properties since I've found them quite useful for simplification. I haven't put the time and effort into formal proofs of each property since its part of my personal math property list

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OwenTheProgrammer @owentheprogrammer.bsky.social · 01/04/2026

just fyi as I was passing through the shader code (and not a joke lol) use if you wish github.com/REDSIM/VRCLi... github.com/OwenTheProgr... shader-playground.timjones.io/dafec0022fbf...

Desmos graph comparing the errors of both LV_FastAcos (the red line) and The Shader Grimoires acos function (the blue line) against the Desmos arccosine function.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 31/03/2026

bros about to read a research paper if this works as intended lol

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OwenTheProgrammer @owentheprogrammer.bsky.social · 31/03/2026

trippy.. (64x64 conformal mapping from polar coordinates to [-1, 1] x [-1, 1] square; dont worry bout it :3)

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OwenTheProgrammer @owentheprogrammer.bsky.social · 23/03/2026

aint no one gonna be ready for this one lmao

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OwenTheProgrammer @owentheprogrammer.bsky.social · 14/03/2026

PSA on cos(atan(y,x)), sin(atan(y,x)) cos(atan(y,x)) = x/sqrt(x*x+y*y) = normalize(float2(x,y)).x sin(atan(y,x)) = y/sqrt(x*x+y*y) = normalize(float2(x,y)).y

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OwenTheProgrammer @owentheprogrammer.bsky.social · 22/01/2026

id put an unpopulated resistor on ITERM for when you want to change the current from 10% threshold, also 10u decoupling capacitors are great, but they're better with ones that act quicker (10u + 100n type beat) although the datasheet has 1u on input, 4u7 on output.. so good jab

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OwenTheProgrammer @owentheprogrammer.bsky.social · 11/01/2026

Ever wanted to store a quaternion / versor in 3 floats instead of four? there is actually a mathematically 1:1 (in practice e05 error terms for FP16, e09 for F32) representation using lie algebra. Heres all the code to encode / decode that. Versor -> rotation axis with length of the angle.

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OwenTheProgrammer @owentheprogrammer.bsky.social · 22/11/2025

Probably not you, I couldn’t give a single fuck about 99% of my feed at the moment

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OwenTheProgrammer @owentheprogrammer.bsky.social · 21/11/2025

I knew it would be directly equivalent, but im still surprised its directly equivalent lol This actually might make things for latrix ever so slightly faster / easier to work with, although it does come with the prerequisite of complex analysis, since I cant preprocessor test for i^2=-1 it seems..

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OwenTheProgrammer @owentheprogrammer.bsky.social · 31/10/2025

and after a quick verification, it seems to hold true

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OwenTheProgrammer @owentheprogrammer.bsky.social · 31/10/2025

I've been chugging away at the 3D one all day, but in the 2D solution, I may have found a property that makes things more elegant. The first image is the actual integral (ln -> arcsinh), which is meant to handle one of the four triangle sweeps. The second image is the splitting of the unit square

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OwenTheProgrammer @owentheprogrammer.bsky.social · 09/10/2025

4 bits per sample, 2x2 block segments, 32 samples per colour channel, on a 512x512 CRT

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OwenTheProgrammer @owentheprogrammer.bsky.social · 07/10/2025

wait yeah holy shit ive reinvented xray reconstruction like to a T lmao en.wikipedia.org/wiki/Tomogra...

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OwenTheProgrammer @owentheprogrammer.bsky.social · 07/10/2025

normal latrix on the left, the texture sampled one on the right

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OwenTheProgrammer @owentheprogrammer.bsky.social · 07/10/2025

I fixed the weird fringing from before 512x512 render texture, genuinely insane how it got to this point wtf

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OwenTheProgrammer @owentheprogrammer.bsky.social · 06/10/2025

That normal reconstruction methods pretty solid (doing the normal reconstruction from the point of view of the laser) but its slightly weighted incorrectly, since it solves the direction vector to the tangent plane, not the planes normal itself. Ill try to fix that at some point

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