Freya Holmér"you can't debug print shaders" oh yeah? well check this shit out
that's right, a whole ass view matrix, served directly from the GPU
here's the source code by the way!
https://gist.github.com/FreyaHolmer/71717be9f3030c1b0990d3ed1ae833e3
Froyok@acegikmo Hoooo ! Neat ! I have been wanting to try this the other day in a shader.
boggo@acegikmo Neat trick!
For printing to actual console did you explore maybe writing debug messages to a structured GPU buffer and reading back async on the CPU and then just displaying in normal tty console?
@acegikmo Also unreal has a funny shader graph node that basically displays the text on whatever model it's applied to using just its normal UVs, etc.
@boggo I could! but I didn't need it in this case, this was,, 90% made because I was curious what it would look like lol (but also to debug matrices GPU side)
Aras Pranckevičius
thomas ⛰ vandenberg
deefdragon@acegikmo Just to make sure I understand the code right, thats encoding the numbers such that each pixel's row corresponds to one of the dBits, and the col is the index of the bit in the number in dBit? (AKA the row is binary encoded?
@acegikmo Is there any particular reason you encoded using decimal instead of 0b111010111111101 etc? (I *think* c# supported binary, hex, and oct literals, anyway)
@deef because it looks funnier that way! but also idk if hlsl supports binary literals? It started as a binary literal in C# though before I moved it to hlsl
@acegikmo Ah. I thought it was C#, not hlsl. my mistake. Dunno how it being for a shader didn't tip me off to that..., but I also should not have read float DrawDigit as func DrawDigit lol.
In any event, it appears no. binary for literals is not supported https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-appendix-grammar#integer-numbers Tho hex and oct are, so its odd its missing.
Loïc Denuzière@deef @acegikmo I think this may be the first time I've seen a somewhat legit use case for octal other than Unix permissions. (although it would still be less readable than binary)
Interestingly, binary is a late addition in many languages. C# didn't have it until version 7, and C++ until version 14.
Outfrost@acegikmo oh my god yes please
Bret Mogilefsky@acegikmo That's pretty badass.
Jean-Sébastien GuayIn our engine we can printf from shaders, with extended format specifier syntax for vectors and matrices. We can also create debug primitives from shaders. Extremely helpful. It's often the first thing I implement when I start using a new engine, along with shader hot recompliation if it's not already there. Iteration time and ease of debugging are super important in my opinion.
visy@acegikmo galaxy brain level idea right here
Efi (nap pet) 🦊💤@acegikmo excuse me???
Kevin RussellThats some incredible html in the "gif"
GwenTheKween - Find me @kitsunes.club, I don't see anything here@acegikmo this is really cool. But also, newest GDB can actually debug GPU code on AMD GPUs. You need a proprietary blob from and to do it tho =/
Also idk what Nvidia or Intel are doing, but I think there's chat about how to standardize debug info for GPU code so that we won't need the proprietary blob anymore and more GPUs could be supported
supersingular@GwenTheKween is that for ROCm only or can it also debug Vulkan or DX11/12 shaders?
@supersingular I don't know to be honest. I just see patches flying through every so often
It might be a ROCm specific feature, now that you mention it 
MemeSinyx
Dag Ågren ↙︎↙︎↙︎@acegikmo Ahahaha, that is brilliant.
Vega Rose Dawn Lyra Harmonia
Michael B. Johnson
Allan Chow@acegikmo sci Fi stuff right there!
josh g.w h a t
jaw@acegikmo I use GLSL printf: https://github.com/msqrt/shader-printf
Kamare@acegikmo Freya really just said "hold my vertex"
Megan Fox@acegikmo oh my god this is amazing
vyivel@acegikmo holy shit that's cool as fuck
xelti@acegikmo galaxy-brain level stuff
Andrew Zonenberg@acegikmo GL_EXT_debug_printf would like to have a word with you...
But interactive on-screen debug visualizations are definitely nicer in a lot of cases than logging to stdout.
vriska, thief of light 
@acegikmo isn't there
GL_EXT_debug_printf
olivia 🏳️⚧️@acegikmo there's a similar minimal shader font for debug info in the vrchat audiolink package.. but it's overengineered to use sdfs: https://github.com/llealloo/audiolink/blob/master/Packages/com.llealloo.audiolink/Runtime/Shaders/SmoothPixelFont.cginc
