public MovementResult Move(int fieldWidth, int fieldHeight, UIApple apple)
{
UISegment oldHead = this.body.Last();
UISegment newHead = new UISegment(
oldHead.X + this.deltas[this.direction].X * oldHead.Width,
oldHead.Y + this.deltas[this.direction].Y * oldHead.Height,
oldHead.Width,
oldHead.Height,
oldHead.Pen);
if (newHead.X >= fieldWidth || newHead.X < 0 ||
newHead.Y >= fieldHeight || newHead.Y < 0)
{
return MovementResult.Wall;
}
if (this.IsOn(newHead))
{
return MovementResult.SelfBite;
}
// the following two operations create the effect of motion:
// 1. add the new head in front of the old one
this.body.Enqueue(newHead);
// if the snake is on the apple
if (this.IsOn(apple))
{
// increase the length by 1, i.e. don't remove the last segment
this.removedSegment = null;
return MovementResult.OnApple;
}
else
{
// 2. remove the last segment
this.removedSegment = this.body.Dequeue();
}
return MovementResult.OK;
}
public MovementResult Move(int fieldWidth, int fieldHeight, UIApple apple)
{
UISegment oldHead = this.body.Last();
UISegment newHead = new UISegment(
oldHead.X + this.deltas[this.direction].X * oldHead.Width,
oldHead.Y + this.deltas[this.direction].Y * oldHead.Height,
oldHead.Width,
oldHead.Height,
oldHead.Pen);
if (newHead.X >= fieldWidth || newHead.X < 0 ||
newHead.Y >= fieldHeight || newHead.Y < 0)
{
return(MovementResult.Wall);
}
if (this.IsOn(newHead))
{
return(MovementResult.SelfBite);
}
// the following two operations create the effect of motion:
// 1. add the new head in front of the old one
this.body.Enqueue(newHead);
// if the snake is on the apple
if (this.IsOn(apple))
{
// increase the length by 1, i.e. don't remove the last segment
this.removedSegment = null;
return(MovementResult.OnApple);
}
else
{
// 2. remove the last segment
this.removedSegment = this.body.Dequeue();
}
return(MovementResult.OK);
}