29 lines
1.1 KiB
C#
29 lines
1.1 KiB
C#
using System.Collections.Generic;
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using Syntriax.Engine.Core;
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namespace Syntriax.Engine.Systems.Tween;
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public static class TweenShape2DExtensions
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{
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public static ITween TweenShape2D(this Shape2D shape, ITweenManager tweenManager, float duration, Shape2D targetShape2D)
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{
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List<Vector2D> initialVertices = new(shape.Vertices);
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List<Vector2D> shapeVertices = new(shape.Vertices);
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return tweenManager.StartTween(duration,
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t =>
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{
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shapeVertices.Clear();
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int count = Math.Lerp(initialVertices.Count, targetShape2D.Vertices.Count, t).RoundToInt();
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for (int i = 0; i < count; i++)
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{
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int initialIndex = i.Min(initialVertices.Count);
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int targetIndex = i.Min(targetShape2D.Vertices.Count);
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shapeVertices.Add(targetShape2D.Vertices[targetIndex].Lerp(initialVertices[initialIndex], 1f - t));
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}
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shape.Vertices = shapeVertices;
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}
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);
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}
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}
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