rubenwardy's blog

I was contacted by a client to create a system which calculates the workload for employees based on their assignment to tasks and appointments.

The system needs to solve two problems: Firstly, different staff members work different numbers of hours, which makes it hard to allocate tasks fairly and proportionally. Secondly, the client wanted to use the system to analyse past workloads and to anticipate future workload, in order to improve her system of work.

Here is a shell script specific for GNU/Linux based operating systems to use. On different operating systems the convert commands will be the same, but the for loop will be different due to a different batch file syntax.

rm /tmp/imageex -r
mkdir /tmp/imageex
for filename in *.png; do
    echo "Processing $filename"
    convert $filename -background White \
        label:$filename -gravity Center \
         -append -pointsize 14 \
        /tmp/imageex/$filename.png
done
echo "Exporting to PDF..."
convert /tmp/imageex/*.png output.pdf
echo "Done."

Hello 2015! Recently I have created an implementation of the 3D projection algorithm. It is just wireframe models. It works pretty well, except it doesn’t do frustum culling. You still see things that are behind you, but upside down.

The source code of this implementation is available under the WTFPL or CC0 licenses - you can choose which one you want to use. Use WASD to move, arrow keys to rotate, space to ascend and shift to descend.

Hi all! I’m back again for another post. This time I am going to show off a project I have had for quite a while - it is a cellular automaton which simulates the Lotka Volterra equations.

Just a short post this time - I have created some widgets for the chess website Lichess. I was quite surprised that these did not exist yet, in any form. Luckily Lichess exposes an API to use. You can have a look at them by clicking the link below.

Lichess is an online chess game and community. It is free and open source, ad-free and subscription-free. You can play against your friends, random strangers and the computer. You can create teams to compete in tournaments. There are tournaments going on all the time.

Recently I have been looking at languages and compilation: VMs, parse trees, lexers, and interpreters. Nand to tetris is a pretty awesome guide to how the CPU executes programs - from logic gates to high level languages.