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Runtime/CollisionLOD/LodSphereCollider.cs

@@ -2,11 +2,44 @@ using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
+using XericLibrary.Runtime.MacroLibrary;
 
 namespace XericLibrary.Runtime.CollisionLOD
 {
 	public class LodSphereCollider : LodColliderBase
 	{
-        
-    }
+		#region 字段属性
+
+		/// <summary>
+		/// 半径
+		/// </summary>
+		private float radius;
+
+		#endregion
+
+		#region 碰撞检测
+
+		private static bool CheckCollision(LodSphereCollider sphere1, LodSphereCollider sphere2)
+		{
+			return Vector3.Distance(sphere1.BoundSize.center, sphere2.BoundSize.center)
+			< sphere1.radius + sphere2.radius;
+
+		}
+
+		private static bool CheckCollision(LodSphereCollider sphere, LodBoxCollider box)
+		{
+			/*
+			 * 对于任意AABB和圆的最近点的计算：
+			 * 获取圆心C与AABB中心B的偏移量D
+			 * 用AABB的范围去限制这个偏移量
+			 * 此时矢量总是位于AABB的边缘处
+			 */
+			 return (sphere.BoundSize.center - box.BoundSize.center)
+			.Clamp(box.BoundSize.min, box.BoundSize.max)
+			.Add(box.BoundSize.center)
+			.Distance(sphere.BoundSize.center) <= sphere.radius;
+		}
+
+		#endregion
+	}
 }