public override void UpdateMovement(GameTime gameTime, ref GameData gameData)
{
if (Path.Count > 0)
{
if (CurrentDesination.Position == RectangleF.Empty)
{
NewPathCalc();
}
Position += Direction * (Speed * (float)gameTime.ElapsedGameTime.TotalSeconds);
ElapsedTravelTime += gameTime.ElapsedGameTime.TotalSeconds;
if (CurrentDesination.Position.Intersects(Bounds) || ElapsedTravelTime > (EstimatedTimeToDestination * 1.2))
{
Path.RemoveAt(0);
CurrentDesination = new PathLocation()
{
Position = RectangleF.Empty
};
}
}
else
{
IsMoving = false; //No items in the Path list, disable moving
}
}
public Animal()
{
CurrentDesination = new PathLocation()
{
Position = RectangleF.Empty
};
FinalDestination = new PathLocation()
{
Position = RectangleF.Empty
};
Path = new List <PathLocation>();
ElapsedTravelTime = 0;
ElapsedTimeSinceLastThought = 0;
}
public override List <PathLocation> GetPath(GameData gameData)
{
List <PathLocation> returnPath = new List <PathLocation>();
int closestIndex = -1;
double closestDistance = 999999999.0;
for (int i = 0; i < gameData.Sprites.Count; i++)
{
//If we ever end up needing to reference a value not on SpriteBase then this code should change to cast the sprite as Animal then check if the result is null or not
if (gameData.Sprites[i] != ThinkingAnimal && gameData.Sprites[i].IsAlive && gameData.Sprites[i] is ILiving && !(gameData.Sprites[i] is Wolf))
{
double curDistance = Math.Sqrt(
(gameData.Sprites[i].Position.X - ThinkingAnimal.Position.X) * (gameData.Sprites[i].Position.X - ThinkingAnimal.Position.X) +
(gameData.Sprites[i].Position.Y - ThinkingAnimal.Position.Y) * (gameData.Sprites[i].Position.Y - ThinkingAnimal.Position.Y)) / ThinkingAnimal.Speed;
if (curDistance < closestDistance)
{
closestDistance = curDistance;
closestIndex = i;
}
}
}
if (closestIndex >= 0)
{
PathLocation path = new PathLocation();
//Determine the position, sprite rotation, estimated time and direction. This prevents the main thread from having to do all these calculations
path.Position = RectangleF.PositionToRectangle(gameData.Sprites[closestIndex].Position);
path.Rotation = (float)Math.Atan2((path.Position.Y - ThinkingAnimal.Position.Y), (path.Position.X - ThinkingAnimal.Position.X)) + MathHelper.ToRadians(90);
path.EstimatedTime = (Math.Sqrt((path.Position.X - ThinkingAnimal.Position.X) * (path.Position.X - ThinkingAnimal.Position.X) + (path.Position.Y - ThinkingAnimal.Position.Y) * (path.Position.Y - ThinkingAnimal.Position.Y))) / ThinkingAnimal.Speed;
path.Direction = new Vector2((float)Math.Cos(path.Rotation - MathHelper.ToRadians(90)), (float)Math.Sin(path.Rotation - MathHelper.ToRadians(90)));
path.Direction.Normalize();
returnPath.Add(path);
}
return(returnPath);
}