Genetic Neural Network

Unity project about genetically🧬 selected neural networks
Currently on Unity 2020.2.3

GIFs because why not

First Generation

20 seconds later

45 seconds later

7 minutes later

12 minutes later

First Generation	2 minutes later

What is this project

Made on free time, it is an experimentation on Neural Networks and Genetic Algorithms. Long story short: The little guys "evolve" to navigate the map

How to use it?

Download Unity and clone/download the repo and open the project! You'll see a single scene that can be used as is or changed. It contains the following:

• SCRIPTS: General information and options to control the Population.
  • On MazeBuilder
    • Map number - Defines both the map to be built and the save file to be used when saving
    • Maze Parent - Parent object for the maps to keep things organized
    • Select the Map Number you want and click "Build"
  • ⏸Pause Condition - If you want to pause the simulation at specific points
  • 🔃Load Save File - Loads a specific save file on Play. Agents will be copied based on the NN saved on the file of this index (set it to -1 to ignore)
  • 💾Save On Better Fitness - If an Agent achieves a better fitness than the one saved, its NN will be saved overwriting the old one
  • Auto Select First Agent - Helps with visualization
  • Number Of Agents - Used both to create agents and maps
  • Input, hidden and output nodes - Input nodes are adjusted automatically to changes on the Agent. Hidden nodes can be altered at will (breaks saves)
  • Agent mutation rate - Chance of each agent to be mutated, when creating a new generation
  • Neuron mutation rate - Chance of each node to be mutated, if the agent was selected for mutation
  • Mutation amount - How much the value of the node will be mutated
  • Procreation percentage - How many of a new generation should be created from mating, instead of randomly
  • Randomize starting heights - If the starting heights of the agents should be random
  • Starting height - Used if the above condition is false
  • Original Agent - Acts as a prefab, but should be left on the scene and will be deactivated on Play
  • Agent Parent: Parent object for the agents to keep things organized

Goals

I will be updating this for easy of usage and clarity when possible. Making it easily costumizable and simple to use are the goals, so it can be used in a variety of different games and experiments.