Dec 2011 - Dec 2020 |
Founder, CTO, Guardsquare, Leuven, Belgium |
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Jun 1999 - Nov 2011 |
Project lead, Luciad, Leuven, Belgium |
Apr 1996 - May 1999 |
Postdoctoral research associate, Program of Computer Graphics, Cornell University, Ithaca, NY |
Aug 1991 - Feb 1996 |
PhD in computer science, Computer Graphics Research Group, Department of Computer Science, Faculty of Engineering, Katholieke Universiteit Leuven, Belgium |
Sep 1986 - Jul 1991 |
Master's degree in engineering, computer science, Faculty of Engineering, Katholieke Universiteit Leuven, Belgium |
At Cornell, I got involved in the measurement and representation of light reflectance functions. These functions describe how surfaces reflect light: diffusely, glossy, mirror-like, etc. They are basic building blocks for global illumination algorithms.
The light measurement lab offered an excellent place to perform reflectance measurements using specular and diffuse reflectometers, and using a custom-built gonioreflectometer. You can still find some of my measurements at the measurement page.
The measurement data are quite bulky. I've introduced a new representation for light reflectance functions that is compact and particularly suited for global illumination computations. I've presented this work at Siggraph '97, in the paper
You can find a complete list of my papers on my publications page.
ProGuard | A successful free shrinker, optimizer, obfuscator, and preverifier for Java bytecode. |
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DexGuard | The commercial sibling of ProGuard, for optimizing and protecting Android apps. |
Rock Runner 2 (1996) | An unpublished isometric game for the Acorn Archimedes. It's written in ARM assembler and features ray-traced tiles. |
Rock Runner (1985) | An 8-way scrolling game for the TI-99/4A, heavily inspired by Boulder Dash. It's written in TMS-9900 assembler. The code fits in 4K of memory. |
Windsurfing | On Boa Vista (Sal Rei), Tenerife (El medano), Fuerteventura (Sotavento), the Red Sea (Ras Sudr, Safaga, Hurghada), Cayuga lake (Ithaca), and in Holland. |
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Sailing | Previously on Cayuga lake: anything sailable at East Shore Sailing. Out of interest, I've collected wind statistics for Ithaca in 1997 and 1998. |
Skiing | In France, Switzerland, Austria, Utah, Vermont, and New York. |
Rock climbing | Indoor, at 5c or 6a on a good day. |
Biking | For all local destinations. |
Sculpting | Mathematics-inspired shapes in soap stone. |
Cooking | Survival skill picked up in the US and in subsequent cooking classes. Recipes for my favorite deserts. |