https://dfux.me/tags/brainiac/ Recent content in Brainiac on Dirk Hugo en-us This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Mon, 19 Oct 2026 17:39:27 +0200 https://dfux.me/posts/2026-10-19-why-does-the-build-take-so-long/ Mon, 19 Oct 2026 19:30:00 +0200 https://dfux.me/posts/2026-10-19-why-does-the-build-take-so-long/ <p>Building <a href="https://github.com/difu/Brainiac">Brainiac</a> on my Mac took too long. Long enough that working on two things in parallel was no fun at all. So I had a look at what my machine was actually doing all that time.</p> <h3 id="55-times-the-same">55 times the same</h3> <p>Brainiac has about 120 source files and 55 test executables. And every single test compiled all of the sources again. Every new test got its own <code>add_executable</code> with the complete source list. Fine for three tests. Not for 55.</p> https://dfux.me/posts/2026-10-17-why-do-the-feet-slide/ Sat, 17 Oct 2026 13:00:00 +0200 https://dfux.me/posts/2026-10-17-why-do-the-feet-slide/ <p><img src="https://dfux.me/brainiac/walkers_on_field.png" alt="Walkers on the field"></p> <p>My old agent simulation <a href="https://github.com/difu/Brainiac">Brainiac</a> got walkers. Each one has a small fuzzy logic brain that decides when to start, walk, turn away from the edge of the field and stop. The motion itself comes from motion capture data of the <a href="http://mocap.cs.cmu.edu/">CMU Graphics Lab</a>: a real person walking, recorded at 120 frames per second. The field has waves, so the feet are put on the ground with inverse kinematics (IK).</p>