Mathieu Ropert

When people ask why the state finances aren't looking good maybe ask them who oversees and validates public contracts to build stuff like this.

It's not even showing a greyed out option in the app when that happens. You have to go read the docs to figure out why some ticket purchase options disappeared.

Update on the abysmal state of Paris transport tech: they can't store a metro ticket _and_ an airport transfer on the same medium.
The official solution: buy a 2nd card (or use a second phone 🤡) to store each separately.
How much money was spent on this level of incompetence?

YouTube video by SwedenCpp Mathieu Ropert: Learning Graphics Programming with C++

From our most recent Stockholm #Cpp Meetup:
A few lessons that should be quite enlightening and helpful to get started with graphics and game programming with #cplusplus, by @matropert.bsky.social

youtu.be/vL87j4wup1U

Paris métro evolves. To force you even harder to use their garbage app they discontinued paper tickets in favour of a "reusable" piece of cardboard they pretend will last you 10 years.
Still can't tap your bank card on the gate like in normal places.

AI content moderation is a waste of everybody's time. It's a best merely an annoyance that is trivially bypassed.
I was trying to find a wine I tried but couldn't remember the name (google search was helpless).
Took me 2 extra steps to get over the "sorry can't talk alcohol".

Decaying fascist constructs look so Star Wars

I went to Quick in Brussels and they asked me to pay for mayo with my fries, so by the only metric that matters™️ Belgium isn't a civilized place.

FOSDEM keynote: interesting and enlightening, but kind of hurting its own point that European governments rely on Big Tech too much by trying to do a presentation on custom software that took 5 minutes to get the slides up and broke down 2/3rd of that way into the talk.

French office: "don't like our decision? Go ahead, strike, it's your right".
Québec office: "you made a lukewarm comment about it on LinkedIn, 3 days unpaid leave pending disciplinary hearing"

The way disapproval is treated in France vs Québec at the same employer tells you a lot about the value of labour law protection over any vague idea of "company culture".

Narrator's voice: there a was a bug in it

Benchmarking with Vulkan, or the curse of variable GPU clock rates · Mathieu Ropert Trying to get reliable benchmarks on a GPU that keeps adapting its clock rate.

Wrote a short article about my experience benchmarking Vulkan apps and fighting GPU variable clock rates.
mropert.github.io/2026/01/29/b...

Now I finally understand the origin of the meme 😐

✊

Baz Obungler saying "here's a podcast that does a good job"

Sir, thank you

I have implemented occlusion culling.
My scene is now slower. Hurray 😂

This talk at my meetup has a slide that I'd like to call "Every Unreal vs Bespoke Tech Chart"

My Vulkan project now also links DX12 on local windows builds just to be able to call SetStablePowerState() and have any form of meaningful metrics.
I hesitate to put it in my Vulkan lib as a utility.

This company is having a hard time making a 2d ANSI text terminal run at 60fps and they demand you take them seriously when they talk about revolutionizing programming.

"What if a guy who commanded Apollo 10 in the late 60s was a mission commander on Mars in the 2000s?"
"What if a closeted lesbian was Reagan's true successor?"
No! This is insane.
Do you hear yourself? Are you high?

I'm rewatching For All Mankind and while I wholeheartedly recommend the first seasons it becomes a boomer fantasy as it goes.

For All Maxkind

Adding a transitive dependency that end up including <Windows.h> is a mistake that can happen, I'm fine with that.
But not fixing it 5 years after someone reports the issue is insane.

There has been PRs trying to fix this for *checks notes* 5 YEARS and none were approved/escalated?!

Build: do not include windows.h from header files by aras-p · Pull Request #1932 · uxlfoundation/oneTBB Description Including &lt;windows.h&gt; is both 1) including a lot of code, and 2) leaving a lot of &quot;damage&quot; since it defines many things as preprocessor macros (e.g. far, near, GetObject...

TBB includes <windows.h>? In this *public* headers? Without WIN32_LEAN_AND_MEAN?
Since when?
Kill it! I don't care how, with this PR (github.com/uxlfoundatio...) or another, just do it.

Graphics tip: does your PBR renderer look ugly on some models you found on the internet? Just add a setting to turn it off. Simple!

I found that VMA exposes their alloc algorithm for usage without a backend they manage.
gpuopen-librariesandsdks.github.io/VulkanMemory...

One big index buffer is only OK as long as you only append, when doing hot reload and data streaming we need to handle the gaps left by the removed entries or eventually run out of buffer space.
You end up reimplementing malloc🫤

I can bypass vertex buffers bindings with vertex pulling (I already do), but I don't see how I can bypass index buffer binding. Needs a buffer shared by all meshes rendered in one DrawIndirect call cause the API takes offsets, not device addresses.