public World(int initWidth, int initHeight, int numAnts, int numFoodPiles, int foodPerPile)
{
t = new Thread(TimeStep);
height = initHeight;
width = initWidth;
field = new int[width + 50, height + 50];
pheromone = new float[width + 50, height + 50];
redAnts = new List<Ant>();
blueAnts = new List<Ant>();
foods = new List<Food>();
anthills = new Anthill[2];
// create anthill
Location anthill0 = new Location(width / 4, height / 2);
Location anthill1 = new Location(3 * width / 4, height / 2);
anthills[0] = new Anthill(new Rectangle(anthill0.x - 7, anthill0.y - 7, 14, 14));
anthills[1] = new Anthill(new Rectangle(anthill1.x - 7, anthill1.y - 7, 14, 14));
// create ants
for (int i = 0; i < numAnts; i++ )
{
redAnts.Add(new Ant(Ant.Affiliance.Red, this, new Rectangle(anthill0.x - 2, anthill0.y - 2, 4, 4)));
blueAnts.Add(new Ant(Ant.Affiliance.Blue, this, new Rectangle(anthill1.x - 2, anthill1.y - 2, 4, 4)));
}
// create food
for (int i = 0; i < numFoodPiles; i++)
foods.Add(new Food(new Rectangle((int)rand.Next(25, width - 25), (int)rand.Next(25, height - 25), 10, 10), foodPerPile));
}
private void ReleasePheromoneOnFood(Location foodLocation)
{
world.pheromone[foodLocation.x, foodLocation.y] += pheromoneStore * .9F;
}
/// <summary>
/// Finds the closest direction from one point to another in an 8 neighbor system.
/// </summary>
/// <param name="start">Starting position</param>
/// <param name="end">End position</param>
/// <returns>Float direction 0-7 for use in an 8 neighbor system.</returns>
private float GetSecondaryDirection(Location start, Location end)
{
// Find direction in radians from start to end points
double direction = GetDirectionInRadians(start, end);
// Convert from radians to secondary direction denoted by 0-7.
// Get direction + pi/8 then divide by pi / 4
direction += Math.PI * .8;
direction = (direction * 4) / Math.PI;
return (float)direction;
}
private void GetFood(Food food)
{
hasFood = true;
Location foodLocation = new Location(food.location.Left, food.location.Top);
ReleasePheromoneOnFood(foodLocation);
food.GetFood();
}
/// <summary>
/// Finds direction in radians from a start to an end point
/// </summary>
/// <param name="start">Starting position</param>
/// <param name="end">End position</param>
/// <returns>Direction in radians from start to end as double.</returns>
private double GetDirectionInRadians(Location start, Location end)
{
if ((start.x - end.x) != 0)
return Math.Atan((start.y - end.y) / (start.x - end.x));
else if (start.y < end.y)
return 3 * Math.PI;
else return Math.PI / 2;
}