Fizz is a simple 2D physics engine designed for use in experimentation with some genetic algorithms to optimize shapes in an evolutionary process.

To compile, from the parent directory, run

$gcc -lpng -o draw ./src/draw.c ./src/png_util.c

Currently, I ran into some issues with libpng 1.6.34 but had success installing libpng 1.2.59 and changing the LIBPNG_VER_STRING variable in png.h to equal "1.6.34".

To run the simulation, run

$./simulate.sh [INPUTFILE] [NUM_TIMESTEPS] [VERBOSITY] [PROFILE ENERGY]

• [INPUTFILE] is a file which encodes the initial conditions for the simulation. Numerous examples can be found in the simulations directory as any file of the form *.in. Their names are loosely following the convention [Description of fixed objects]_[List of movable objects, separated by '_'].in.

• [VERBOSITY] is a nonnegative integer indicating how much debugging info you wish to be displayed. VERBOSITY = 0 does not print anything. If you do not include VERBOSITY, it defaults to 0.

• [PROFILE ENERGY] is 0 or 1. If selected, plots the kinetic, potential, heat, and total energy for the system over time. Additionally, it saves energy.txt in the simulations directory in CSV format.

This script generates .png files of the form plane_%d.png in the simulations directory as well as simul.gif, which is the stitching of all these files into a single GIF.

Here are some examples from the latest simulation run.