Unity AI Self Driving Car

Span of Project: 12/6/18

Revisited: March 2019

Simulation Background This game simulation is an attempt to create a model that can traverse a racing car track.

Where To Play
https://simmer.io/@apkirito/steeringai

How To Play

1. Press Play to play the game yourself.
2. Press Train to train a generation of cars.
3. Press Test to test a trained car.
4. Use arrow keys to speed up/slow down the simulation.

Script Accomplishments

• used custom Matrix class, Neural Network class from FlappyBirdAI
• implemented Genetic Algorithm (mutation, cross over, repopulate)
• better rewarding system (gave more points for staying in the middle of the track)
• trained within minutes to make a car that can traverse multiple tracks
• created a ui for playing, training, and testing
• wrote custom script that makes a car track using Unity's MenuItem

Notes

• used high mutation (15%)
• only cross over weights that share the same neuron(rows only)
• had 2 parents picked from a pool selection algorithm
• parents made 2 babies instead of 1
• save best brain as a JSON into a txt file
• load brain into game