Summary

A visualizer which can use both simulated annealing and 2-opt to find a good solution to the TSP problem. The program can support running simulated annealing or 2-opt individually, or running them consecutively. For simulated annealing, a red bar at the bottom of the screen represents temperature.

As a note: if you're impatient, 2opt performs much faster than SA! Try NUM_CITIES = 10,000 for some neat graphics.

Demo (1000 cities, SA + 2opt)

click to watch

Customizable options under defs.h

NUM_CITIES: Number of cities

COOL_RATE: Cooling rate for simulated annealing
TEMP: Starting temperature for simulated annealing

SA: Whether or not to use simulated annealing to solve
twOPT: Whether or not to use 2-opt to solve

ANIMATED: Whether or not to animated the solving process, or display to solution when found
SHOW_2OPT_STEPS: Whether or not to show which two links were swapped
DELAY_2OPT_MS: Millisecond delay to make it easier to follow 2opt swaps

Requires SDL2 for graphics. I included all the necessary files along with the .exe to avoid the hassle of installing SDL.