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fix: only interpolate head and tail, keep middle segments grid-snapped

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Prevents diagonal shortcuts when snake bends — middle segments stay
at exact cell centers so L-shaped corners render correctly.
This commit is contained in:
Heller
2026-06-19 10:12:32 +00:00
parent 5da42c119e
commit d483cd0660
1 changed files with 10 additions and 2 deletions
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12
Snake.Avalonia/Views/SnakeRenderer.cs
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@@ -376,11 +376,19 @@ public sealed class SnakeRenderer : Control
if (Segments == null) if (Segments == null)
return (pos.X * CellSize + CellSize * 0.5, pos.Y * CellSize + CellSize * 0.5); return (pos.X * CellSize + CellSize * 0.5, pos.Y * CellSize + CellSize * 0.5);
var isHead = segmentIndex == 0;
var isTail = Segments.Count > 1 && segmentIndex == Segments.Count - 1;
// Only interpolate head and tail — middle segments stay grid-snapped
// to preserve sharp corners when the snake bends.
if (!isHead && !isTail)
return (pos.X * CellSize + CellSize * 0.5, pos.Y * CellSize + CellSize * 0.5);
var from = PreviousSegments != null && PreviousSegments.Count > 0 var from = PreviousSegments != null && PreviousSegments.Count > 0
? AnimationHelper.GetPreviousPosition(segmentIndex, Segments, PreviousSegments, SnakeDirection) ? AnimationHelper.GetPreviousPosition(segmentIndex, Segments, PreviousSegments, SnakeDirection)
: pos; : pos;
var useEasing = segmentIndex == 0; // Head gets easing for snappy feel // Head gets easing for snappy feel; tail uses linear interpolation
return AnimationHelper.InterpolatePosition(from, pos, t, CellSize, useEasing); return AnimationHelper.InterpolatePosition(from, pos, t, CellSize, useEasing: isHead);
} }
} }