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fix: rapid key input causing self-collision

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Heller
2026-06-17 19:12:23 +00:00
parent 7330880c96 f02e389580
commit 76b9faba1a
1 changed files with 9 additions and 3 deletions
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12
Snake.Core/Snake.cs
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@@ -3,6 +3,7 @@ namespace Snake.Core;
public sealed class Snake public sealed class Snake
{ {
private readonly LinkedList<Position> _segments = new(); private readonly LinkedList<Position> _segments = new();
private Direction _pendingDirection;
public Snake(Position start, int length, Direction direction) public Snake(Position start, int length, Direction direction)
{ {
@@ -10,6 +11,7 @@ public sealed class Snake
throw new ArgumentOutOfRangeException(nameof(length), "Length must be at least 1."); throw new ArgumentOutOfRangeException(nameof(length), "Length must be at least 1.");
Direction = direction; Direction = direction;
_pendingDirection = direction;
var offset = DirectionToOffset(direction); var offset = DirectionToOffset(direction);
for (var i = 0; i < length; i++) for (var i = 0; i < length; i++)
@@ -28,23 +30,27 @@ public sealed class Snake
public void SetDirection(Direction direction) public void SetDirection(Direction direction)
{ {
if (direction == Direction) if (direction == _pendingDirection)
return; return;
if (AreOpposite(Direction, direction)) if (AreOpposite(Direction, direction))
return; return;
Direction = direction; if (_pendingDirection != Direction && AreOpposite(_pendingDirection, direction))
return;
_pendingDirection = direction;
} }
public Position PeekNextHead() public Position PeekNextHead()
{ {
var offset = DirectionToOffset(Direction); var offset = DirectionToOffset(_pendingDirection);
return new Position(Head.X + offset.X, Head.Y + offset.Y); return new Position(Head.X + offset.X, Head.Y + offset.Y);
} }
public Position Move(bool grow = false) public Position Move(bool grow = false)
{ {
Direction = _pendingDirection;
var newHead = PeekNextHead(); var newHead = PeekNextHead();
_segments.AddFirst(newHead); _segments.AddFirst(newHead);