/// <summary>Creates a path based on the position and the velocity of the ball.</summary>
public static BallPath Create(Position ball, Velocity velocity, int pickUpTimer, int maxLength)
{
var path = new BallPath()
{
PickUpTimer = pickUpTimer
};
var pos = ball;
var vel = velocity;
for (var turn = 0; turn < maxLength; turn++)
{
path.Add(pos);
pos += vel;
vel *= Accelaration;
if (Game.Field.IsLeft(pos))
{
vel = vel.FlipHorizontal;
var prev = turn == 0 ? ball : path[turn - 1];
if (prev.Y > Goal.MinimumY && pos.Y < Goal.MaximumY &&
prev.Y > Goal.MinimumY && pos.Y < Goal.MaximumY)
{
path.End = Ending.GoalOwn;
return(path);
}
path.Bounces++;
var dX = Game.Field.MinimumX - pos.X;
pos = new Position(Game.Field.MinimumX + dX, pos.Y);
}
else if (Game.Field.IsRight(pos))
{
vel = vel.FlipHorizontal;
var prev = turn == 0 ? ball : path[turn - 1];
if (prev.Y > Goal.MinimumY && pos.Y < Goal.MaximumY &&
prev.Y > Goal.MinimumY && pos.Y < Goal.MaximumY)
{
path.End = Ending.GoalOther;
return(path);
}
path.Bounces++;
var dX = Game.Field.MaximumX - pos.X;
pos = new Position(Game.Field.MaximumX + dX, pos.Y);
}
if (Game.Field.IsAbove(pos))
{
path.Bounces++;
vel = vel.FlipVertical;
var dY = Game.Field.MinimumY - pos.Y;
pos = new Position(pos.X, Game.Field.MinimumY + dY);
}
if (Game.Field.IsUnder(pos))
{
path.Bounces++;
vel = vel.FlipVertical;
var dY = Game.Field.MaximumY - pos.Y;
pos = new Position(pos.X, Game.Field.MaximumY + dY);
}
}
return(path);
}
