Samuel Bouchet
480c783bd6
TrajectView now draws an arrow at each endpoint (since pieces oscillate between start and end, both directions are relevant) and runs a looped width/alpha tween that breathes between 0.3 and 0.75 over ~2.2s. The pulse makes stationary relays visually distinct from static board art without competing with active cargo/particle animations.
58 lines
1.7 KiB
C#
58 lines
1.7 KiB
C#
using Godot;
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namespace Chessistics.Scripts.Pieces;
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public partial class TrajectView : Line2D
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{
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public int PieceId { get; private set; }
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private Polygon2D? _arrowEnd;
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private Polygon2D? _arrowStart;
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private Tween? _pulseTween;
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private Color _baseColor;
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public void Setup(int pieceId, Vector2 from, Vector2 to, Color color)
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{
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PieceId = pieceId;
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_baseColor = color;
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Width = 3f;
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DefaultColor = new Color(color, 0.4f);
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Antialiased = true;
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ClearPoints();
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AddPoint(from);
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AddPoint(to);
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ZIndex = -1;
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_arrowEnd = BuildArrow(from, to, color);
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_arrowStart = BuildArrow(to, from, color);
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AddChild(_arrowEnd);
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AddChild(_arrowStart);
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StartPulse();
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}
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private static Polygon2D BuildArrow(Vector2 from, Vector2 to, Color color)
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{
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var dir = (to - from).Normalized();
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var perp = new Vector2(-dir.Y, dir.X);
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const float arrowSize = 9f;
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var tip = to - dir * 4f;
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var baseL = tip - dir * arrowSize + perp * arrowSize * 0.5f;
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var baseR = tip - dir * arrowSize - perp * arrowSize * 0.5f;
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return new Polygon2D
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{
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Polygon = [tip, baseL, baseR],
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Color = new Color(color, 0.5f)
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};
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}
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private void StartPulse()
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{
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_pulseTween?.Kill();
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_pulseTween = CreateTween();
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_pulseTween.SetLoops();
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_pulseTween.TweenProperty(this, "default_color:a", 0.75f, 1.1f)
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.SetEase(Tween.EaseType.InOut).SetTrans(Tween.TransitionType.Sine);
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_pulseTween.TweenProperty(this, "default_color:a", 0.3f, 1.1f)
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.SetEase(Tween.EaseType.InOut).SetTrans(Tween.TransitionType.Sine);
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}
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}
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