35 lines
1.4 KiB
C#
35 lines
1.4 KiB
C#
using System.Collections.Generic;
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using Engine.Core;
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namespace 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 maxCount = initialVertices.Count.Max(targetShape2D.Vertices.Count);
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for (int i = 0; i < maxCount; i++)
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{
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int initialIndex = (i * (initialVertices.Count / (float)maxCount)).RoundToInt(Math.RoundMode.Floor);
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int targetIndex = (i * (targetShape2D.Vertices.Count / (float)maxCount)).RoundToInt(Math.RoundMode.Floor);
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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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).OnComplete(() =>
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{
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shapeVertices.Clear();
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for (int i = 0; i < targetShape2D.Vertices.Count; i++)
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shapeVertices.Add(targetShape2D.Vertices[i]);
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shape.Vertices = shapeVertices;
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});
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}
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}
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