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Affinity artificial chemistry An architecture for an artificial chemistry featuring 3D continuous physics and and chemical covalent bonding. The "Affinity" artificial chemistry system is a search for interesting (e.g. auto-catalytic) chemical reactions and systems. It is loosely based on the VSEPR (Valence Shell Electron Pair Repulsion) chemistry model. Affinity has a number of tunable parameters, e.g. electron mass, orbital radii, etc. Required packages: OpenGL graphics and the GLUT package are required to build and run the program. They can be obtained from the Mesa project: www.mesa3d.org. The UNIX version also requires the gcc compiler, the make command, and the bash shell. The Windows version requires the Microsoft Visual Studio 2015 (or later) IDE. To build: UNIX: make Windows: use VS solution. To run: Run the executables in the bin folder. Usage: affinity [-cycles <number of cycles>] [-numAtoms <number of atoms>] [-numThreads <number of threads (default=1)>] [-vesselRadius <vessel radius>] [-thermal <radius>,<x>,<y>,<z>,<temperature>] (multiple option) [-randomSeed <random seed>] [-load <load file name>] [-save <save file name>] [-dump <molecule dump file name> ('-' for stdout)] [-noGraphics (turn off graphics)] [-statsFreq <statistics gather frequency (0=never, 1=default)>] e.g., affinity -numAtoms 10 -thermal 3.0,0.0,0.0,0.0,5.0 To run evolve_affinity chemistry parameter evolution program, see usage in evolveAffinity.cpp file.