public void moveActor(IActor actor, int i)
{
int yDiff = 0;
int xDiff = 0;
if (i < 4)
yDiff = -1;
else if (i > 6)
yDiff = 1;
if (i % 3 == 1)
xDiff = -1;
else if (i % 3 == 0)
xDiff = 1;
int newX, newY;
newX = Math.Min(Math.Max(0, actor.position().X + xDiff), xSize - 1);
newY = Math.Min(Math.Max(0, actor.position().Y + yDiff), ySize - 1);
//if (newX != actor.position().X + xDiff || newY != actor.position().Y + yDiff)
// actor.fitness *= 1.1f;
actor.setPosition(newX,newY );
}