private DNA <double> GetCurrentGene()
{
WorldScene scene = Extensions.GetWorldScene();
DNA <double> dna = scene.GenePool.Population[CurrentDNA];
return(dna);
}
private void SetNetworkWeights(DNA <double> dna)
{
WorldScene scene = Extensions.GetWorldScene();
// Get only the network weights
double[] genes = dna.Genes.Take(scene.NeuralNetworkWeightsCount).ToArray();
int index = 0;
foreach (var layer in Network.Layers)
{
foreach (var neur in layer.Neurons)
{
for (int i = 0; i < neur.Weights.Length; i++)
{
neur.Weights[i] = genes[index++];
}
((ActivationNeuron)neur).Threshold = genes[index++];
}
}
if (index != scene.NeuralNetworkWeightsCount)
{
throw new Exception("An error ocurred while retrieving the network weights!");
}
}
/// <summary>
/// Get current WorldScene from the simulation engine
/// </summary>
/// <returns>Current WorldScene</returns>
/// <exception cref="Exception">If the current scene is not an WorldScene, and exception will be thrown</exception>
public static WorldScene GetWorldScene()
{
if (GeneticEvolution.Engine.Scene.GetType() != typeof(WorldScene))
{
throw new Exception("The current running scene is not WorldScene. Cannot capture the food on the world");
}
WorldScene scene = (WorldScene)GeneticEvolution.Engine.Scene;
return(scene);
}
private Food GetClosestFood(EvoEngine engine)
{
WorldScene scene = Extensions.GetWorldScene();
Food food = null;
float dist = float.MaxValue;
foreach (IEntity entity in scene.World)
{
if (entity.GetType() == typeof(Food))
{
float fooddist = Extensions.GetVectorDistance(snake.Location, entity.Location);
if (fooddist < dist && dist > 50.0f) //Ensure we do not circle current food
{
food = (Food)entity;
dist = fooddist;
}
}
}
return(food);
}