public void LoadTrainedSnake()
{
snake = new BotSnake(true);
SnakeBotData data = SaveLoad.LoadSnakeBot();
snake.LoadSnakeData(data);
}
public static void SaveSnakeBot(BotSnake snake)
{
BinaryFormatter bf = new BinaryFormatter();
FileStream stream = new FileStream(Application.LocalUserAppDataPath + "\\config.snakeBotData", FileMode.Create);
SnakeBotData data = new SnakeBotData(snake);
bf.Serialize(stream, data);
stream.Close();
}
//construct
public SnakePopulation(int size, double mutationRate = 0.07) //start with mutation rate of 1%
{
Snakes = new BotSnake [size];
for (int i = 0; i < Snakes.Length; ++i)
{
Snakes [i] = new BotSnake();
}
GlobalBestSnake = Snakes [0].Clone();
PopulationMutationRate = mutationRate;
}
public void InitEnemySnake()
{
if (Configerator.instance.ActiveLevel.EnemySnakeEnabled)
{
enemySnake = new BotSnake(false);
enemySnake.CurrentFoodUnit = snake.CurrentFoodUnit;
SnakeBotData data = SaveLoad.LoadSnakeBot();
enemySnake.LoadSnakeData(data);
}
}
public void CreateNextGeneration()
{
BotSnake [] NextGen = new BotSnake [Snakes.Length];
NextGen [0] = GlobalBestSnake.Clone();
if (PopulationMutationRate > 0.01)
{
PopulationMutationRate -= 0.01;
}
/*
* //half mutation rate every 10 generations so that search space is searched more in the begining and we start convergence toward optimum later
* if (generationCounter % 10 == 0 && PopulationMutationRate > 0.015) PopulationMutationRate *= 0.5;
*
* //if after 40 generations snakes are still small, increse mutationRate so that we escape bad local optimum
* if (generationCounter > 40 && GlobalBestSnake.Length < 8)
* {
* PopulationMutationRate *= 10;
* generationCounter = 0;
* }
*/
for (int i = 1; i < NextGen.Length; ++i)
{
BotSnake firstPartner = SelectSnake();
BotSnake child;
if (MersenneTwister.Randoms.NextDouble() < crossoverProbability)
{
BotSnake secondPartner = SelectSnake();
child = firstPartner.Crossover(secondPartner);
}
else
{
child = firstPartner.Clone();
}
child.Mutate(PopulationMutationRate);
NextGen [i] = child;
}
Snakes = (BotSnake [])NextGen.Clone();
//update/reset population params
currentGenerationNo++;
generationCounter++;
currentBest = 4;
PopulationSumOfFitness = 0;
//globalBestFitness = 0;
numOfDeadSnakes = 0;
CurrentBestSnakeIdx = 0;
}
public override void DoStep()
{
// run genethic algorithm
if (gen < maxGen)
{
UpdateAlive();
if (Done())
{
Items.Item.allItems.Clear();
GeneticAlgorithm();
WorldRenderer.UpdateGenerationLabel(gen);
}
}
else
// if all generations were run, save the best snake from all species
if (gen == maxGen)
{
BotSnake bestSnake = Species[bestSpeciesIdx].GlobalBestSnake;
SaveLoad.SaveSnakeBot(bestSnake);
}
}
private static void RenderSnake()
{
if (Configerator.instance.GameType == Configerator.Game.bot)
{
BotWorld botWorld = (BotWorld)instance.World;
instance.snakeLabel.Text = "Best Snake Idx: " + botWorld.Species [0].CurrentBestSnakeIdx.ToString();
// COMENT THIS NOT TO RENDER JUST BEST CURRENT SNAKE
BotSnake snake = botWorld.Species [0].Snakes [botWorld.Species [0].CurrentBestSnakeIdx];
RenderPiece(snake.HeadPosition, Brushes.Red);
foreach (Vector2 part in snake.BodyParts)
{
RenderPiece(part, Brushes.White);
}
if (snake.CurrentFoodUnit != null)
{
RenderPiece(snake.CurrentFoodUnit.Location(), Brushes.Yellow);
}
// UNCOMMENT THIS TO RENDER ALL SNAKES
//int idx = 0;
//foreach (BotSnake snake in botWorld.Species [0].Snakes)
//{
// if (snake.isDead || idx++ > 0)
// {
// continue;
// }
// RenderPiece(snake.HeadPosition, Brushes.Red);
// foreach (Vector2 part in snake.BodyParts)
// {
// RenderPiece(part, Brushes.White);
// }
// RenderPiece(snake.CurrentFoodUnit.Location(), Brushes.Yellow);
//}
}
else if (Configerator.instance.GameType == Configerator.Game.test)
{
TestBotWorld testBotWorld = (TestBotWorld)instance.World;
instance.snakeLabel.Text = "Testing evolved snake";
BotSnake snake = testBotWorld.snake;
RenderPiece(snake.HeadPosition, Brushes.Red);
foreach (Vector2 part in snake.BodyParts)
{
RenderPiece(part, Brushes.White);
}
if (snake.CurrentFoodUnit != null)
{
RenderPiece(snake.CurrentFoodUnit.Location(), Brushes.Yellow);
}
}
else
{
Snake snake = instance.World.snake;
RenderPiece(snake.HeadPosition, Brushes.Red);
foreach (Vector2 part in snake.BodyParts)
{
RenderPiece(part, Brushes.White);
}
if (instance.World.enemySnake != null)
{
BotSnake enemySnake = instance.World.enemySnake;
RenderPiece(enemySnake.HeadPosition, Brushes.Red);
foreach (Vector2 part in enemySnake.BodyParts)
{
RenderPiece(part, Brushes.White);
}
}
}
}
public SnakeBotData(BotSnake snake)
{
snake.SaveSnakeData(ref whi, ref whh, ref who);
}
