I was interested in boids since I read an article on them in the mid 1980s1. Finally, some time to dabble around. This is a pure hobby project, nothing in it will meet any production standards whatsoever. I haven't worked with C++ for two decades. Progress will be erratic at best.
The goal is to experiment with a 2D simulation of people in crowded environments. For example,
- a pedestrian road where people enter/leave stores, move alone or in small groups, stop randomly at shopping windows or gather in front of snack bars, etc.
- a train platform with people waiting to embark trains, crowds during entry/exit of a train, etc.
The program is being developed on MacOS. The pipeline also compiles on Ubuntu.
mkdir Debug
cd Debug
cmake -D CMAKE_BUILD_TYPE=Debug ..
cmake --build .
./boid_simulation
Alternatively, use Release instead of Debug.
For clangd integration with neovim, you also may need to symbolically link the compile commands database to the project root:
ln -s /path/to/boids/Debug/compile_commands.json /path/to/boids
To test, execute ./Debug/tests/tests or call ctest inside the Debug directory.
python3 -m venv venv
source venv/bin/activate
python3 -m pip install cmakelang clang-format clang-tidy
I've enabled the following pre-push hook:
#!/bin/sh
./scripts/format.sh
./scripts/tidy.sh
In particular, clangd is not reporting everything clang-tidy reports on the command line. I haven't figured out yet why that happens.
Logs go to logs/development.txt. To specify the log level:
./boid_simulation SPDLOG_LEVEL=debug
- Reynolds, "Flocks, herds and schools: A distributed behavioral model"
- Kim, Sujeong et al, "Interactive simulation of dynamic crowd behaviors using general adaptation syndrome theory", 2012
Footnotes
-
IIRC it was in the German magazine "P.M. Peter Moosleitners interessantes Magazin", and from the pictures I remember I assume they reported on Reynolds, Flocks, herds and schools: A distributed behavioral model ↩