56 lines
1.9 KiB
C#
56 lines
1.9 KiB
C#
using UnityEngine;
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namespace XericUI.VisualForm
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{
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/// <summary>
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/// 碰撞分离静态工具类。
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/// 提供两个矩形之间的排斥力计算，用于屏幕空间UI碰撞分离。
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/// 算法参考 BubblePhysicsSolver.CalculateRepulsionForce。
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/// </summary>
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public static class CollisionUtils
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{
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/// <summary>
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/// 计算两个重叠矩形的相互排斥向量（从A推离B的方向）。
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/// 沿最小重叠轴方向推开，推力大小 = 重叠深度 × 推力系数。
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/// </summary>
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/// <param name="rectA">矩形A</param>
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/// <param name="rectB">矩形B</param>
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/// <param name="pushForce">推力系数（0到1），默认0.5</param>
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/// <returns>A应受到的推离向量（B应施加相反向量）</returns>
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public static Vector2 CalculateRepulsion(Rect rectA, Rect rectB, float pushForce = 0.5f)
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{
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Vector2 centerA = rectA.center;
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Vector2 centerB = rectB.center;
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Vector2 delta = centerA - centerB;
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float halfW = (rectA.width + rectB.width) * 0.5f;
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float halfH = (rectA.height + rectB.height) * 0.5f;
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float overlapX = halfW - Mathf.Abs(delta.x);
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float overlapY = halfH - Mathf.Abs(delta.y);
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if (overlapX <= 0f || overlapY <= 0f)
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return Vector2.zero;
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// 沿最小重叠轴推开
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if (overlapX < overlapY)
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{
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return new Vector2(Mathf.Sign(delta.x) * overlapX * pushForce, 0f);
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}
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else
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{
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return new Vector2(0f, Mathf.Sign(delta.y) * overlapY * pushForce);
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}
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}
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/// <summary>
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/// 判断两个矩形是否重叠
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/// </summary>
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public static bool Overlaps(Rect a, Rect b)
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{
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return a.xMin < b.xMax && a.xMax > b.xMin &&
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a.yMin < b.yMax && a.yMax > b.yMin;
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}
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}
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}
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