We have seen previously the Bernstein-Vazirani algorithm.

This algorithm is a search algorithm. Given an unknown function \(f\) that returns \(1\) only for a single value \(x\), and \(0\) otherwise. Well, \(f\) is not completely unknown. We know it is a dot product of its input with a secret key …

Computing is about writing code. Whether it is with punched cards, assembly, Python, or vibe coding using prompts for retards, we need a way to tell the computer which algorithm we want to execute.

I'm currently experimenting with qiskit, the IBM Python library for quantum computing. I don't know if …

I continue this journey in quantum computing with a completly useless, however fundamental, quantum algorithm: The Deutsch Algorithm.

– Hurray, yet another theorical tool that I will never use...

Remember the last time you have to use a Turing machine ? Right. But without Turing Machine, there won't be any of todays …

We have seen before some quantum gates acting on a single qbit. We will now see a family of qgates taking 2 qbits as input and returning 2 qbits: the Controlled gates.

– Why does it return 2 qbits ? In classical logic, gates take 2 bits and return only 1 bit …

Like the classical AND, OR, NOT, etc... gates for classical bit, there are Quantum Gates for QBits. We will see some examples on Quantum gates acting on a single QBit.

Small reminder of classical gates

A boolean gate is a gate taking one or several boolean values as input, and …

I don't like deep learning and current AI buzz. Really. That "Hey, let's initialize billions of values and make them converge to whatever good enough solution could solve some problem with good probability, but we don't know how" really annoys me. So I decided to take a look at the …

Last year, I have developed a small video game for my company to raise awareness about renewable energy. I named it Synergia. Unfortunatly, because of process issues, I cannot publish it and it is only avaible on the company's intranet. Anyway. This game takes the form of a small city …

For a long time, I have considered that to build a complex system, you had to take a lot of care in the design phase, and this design phase should happen at the beginning of the project. You should carefully define your architecture and anticipate future needs in order to …

Let's set the scene. You have a Unity application. It goes smoothly in Unity Editor, but when built in WebGL, embedded into your web page, and feed up with real data, it starts to slow down. How to profile that ?

Using Chrome profiler

Long story short, run your app in …

I've just followed an excellent training from CRNS about Trusted AI, especially applied to NLP and LLM (well, ChatGPT in the end). And I wanted to play a bit with the different models.

I'm very protective with my data. I'm using ChatGPT daily, but I often spend time finding a …

Introduction

Certain tests cannot be conducted solely by comparing the return value of a function, particularly when custom shaders are in use. In such scenarios, it becomes necessary to perform comparisons based on screenshots. Fortunately, Unity offers some tools to do so, using the Unity's Graphics Tests Framework.

Graphics Tests …

Like most of 3D/Game engines, Unity works with single float precision coordinates. As it is not an issue for most use cases, this may be a problem when you deal with geographical coordinates or very large world. Let's see how to handle this problem using the Unity's High Precision …

The term "API," which stands for Application Programming Interface, has been a fundamental concept in computer science from its inception. Whenever you develop a function, create a class, or establish an entry point, you are essentially defining an API. However, the crucial question is: Who will be using your APIs …

No one read the documentation.

It is the sad truth. You have developed the most awesome Unity asset, using the most advanced state of the art ray-casted-signed-distance-field-backed-layer-based-mipmap-inspired-linear-fading technic, but no-one understands how to use it. So you wrote a documentation. But people won't read it. Because no one read the …

I've worked in medical domain from time to time since 2010, especially to display DICOM images, and if I had a dollar every time I heard “This picture is upside down”, I think I could have bought a sandwich. Yes, that's not so frequent but when it happens, it quickly …

Do you have difficulties choosing between creating new features and fixing bugs ? Maybe you should give a try to the Retrobinet. A sprint retrospective format to trigger discussion about priorities between maintenance and feature.

The concept

Retrobinet comes from "Robinet", the French word for Faucet. The idea is to have …

I'm currently looking for a house in Montpellier, and I'm still wondering if the price displayed could be negotiated or not. So instead of thinking for myself (I'm very bad at business…), I prefer to let the computer do it for me.

To have a rough estimation of a property …

A few years ago, a hiring slot was opened in my team and our manager asked us which profile will be the most useful. We were a dream team, the best of the best. We lacked no skills ! And we didn't really know how to orient the job description. Should …

In this article, I'm going to talk about something that has nothing to do with software development, but something I enjoyed working on and would like to put down on paper before I forgot everything.

Indeed, I will talk about Electron Microscopy, a topic I worked on when I was …

Git is a tool, and like any tool, there is a big difference between using it and using it properly. I will describe in this article the workflow I'm using in my day-to-day developer's job.

Starting to Work on a Ticket

When I start working on a Bug, on a …

Product backlog is really the barebones of agile scrum teams. It help Product Owner to communicates vision to stakeholders, it help dev team to anticipate future needs and adjust design accordingly and it help Scrum master analyzing how team can be more efficient in its work.

Unfortunately, backlog is often …

Ah, stories... Dev team complains they are not enough specified, Product Owner complains he doesn't have time to write them and Scrum Master complains they are a meaningless mess. But writing a story should not takes than much time and it doesn't have to be detailed to be clear. Let's …

Tests are an essential part of development. Well tested application have more line of code in tests than in actual code. But not all tests are equals and, unfortunately, some tests are written only for the sake of reaching a code coverage target or making QA happy to see test …

I will talk about an antipattern I've encountered a few time, but I didn't find it in literature, so I called it the "Chevron antipattern". Let-me know if you recognize it and if it has a true name 😉

Class Diagram

Let's start by an example. Assume you develop an application …

If you are in your mid-thirties, you probably remember Cool Runnings (or Rasta Rocket for French people). I watched this movie a dozen times when I was a child. But did you know this movie was about a young Scrum team doing its Agile transformation ? Let's have a look at …

I won't surprise anyone if I say evaluations are most of the time underestimated. Parkinson's law ensure estimations will never be overestimated anyway, but how can we better anticipate all the impediments that will delay our project ?

This article is taken from the "How (not) to refactor a kernel" conference …

We have seen in the previous article how to handle position of object and camera in very large scene. But this still won't solve the shaky problem caused by matrix accumulation. We will here see that only a few place needs to use double precision, and not all your rendering …

We have seen in a previous article why floating point representation may shake our objects in scene. We will now see how to use space change tricks to mitigate this problem.

A brief reminder about World, Model and View space

When dealing with 3D coordinates, we generally use 3 coordinate …

When zooming a lot on 3D objects or when having small object lost in a very large scene, it can happen that your objects "jiggle" from one position to another, making rendering really shaky. We will see in this series of article where does it comes from and how to …

Git is a wonderful tool. But like all tools, it require methods to be used correctly. We will cover in this article some git branching model I have encountered during my career.

Trunk Only Development

Used either by student who don't know what they are doing or by skilled and …

Refactoring is an intrinsic part of software development. However, it seems often difficult to justify a refactoring to the Product Owner. We will see in this article how to properly justify refactoring, when it is useful but also when refactoring is a lost of time.

Why refactoring is a good …

Data allocation/deallocation may represent a significant amount of time in a processing workflow. In this article, we will see how to adress this issue with the Resource Pool Pattern.

What is your problem ?

Imagine we build an image processing pipeline acting on a movie. All images have the same …

When talking about clean code, DRY - Don't Repeat Yourself - often comes into place. DRY is a good practice. Two codes having the same purpose should be merged into single one. Unfortunately when a good practice becomes a dogma, it quickly becomes badly applied, and whenever two codes looks alike, developers …

Non-developer often imagine developer as people who just write code. Actually, some developers also imagine themselves as people who just write code. The point is that a person that just write code is not a developer. It is a coder. Nowadays, developers are no more that neardy guy writing strange …

When dealing with Object-oriented programming, whatever the langage we use, we generally face to two kind of objects which are conceptually different: objects which represent a Value, and objects which represent an Entity.

Value semantic

An object has a Value semantic if object is refered by its value (\<=> value of …