Unity 求出多个物体的中心点

rustum · 发表于 2022-11-19 08:55

using System.Collections;using System.Collections.Generic;using UnityEngine;public class GetCenterPointFunction{ /// <summary> /// 获取不规则多边形几何中心点 /// </summary> /// <param name="mPoints"></param> /// <returns></returns> public static Vector2 GetCenterPoint(List<Vector2> mPoints) { float cx = (GetMinX(mPoints) + GetMaxX(mPoints)) / 2; float cy = (GetMinY(mPoints) + GetMaxY(mPoints)) / 2; return new Vector2(cx, cy); } /// <summary> /// 获取最小X值 /// </summary> /// <param name="mPoints"></param> /// <returns></returns> public static float GetMinX(List<Vector2> mPoints) { float minX = 0; if (mPoints.Count > 0) { minX = mPoints[0].x; foreach (Vector2 point in mPoints) { if (point.x < minX) minX = point.x; } } return minX; } /// <summary> /// 获取最大X值 /// </summary> /// <param name="mPoints"></param> /// <returns></returns> public static float GetMaxX(List<Vector2> mPoints) { float maxX = 0; if (mPoints.Count > 0) { maxX = mPoints[0].x; foreach (Vector2 point in mPoints) { if (point.x > maxX) maxX = point.x; } } return maxX; } /// <summary> /// 获取最小Y值 /// </summary> /// <param name="mPoints"></param> /// <returns></returns> public static float GetMinY(List<Vector2> mPoints) { float minY = 0; if (mPoints.Count > 0) { minY = mPoints[0].y; foreach (Vector2 point in mPoints) { if (point.y < minY) minY = point.y; } } return minY; } /// <summary> /// 获取最大Y值 /// </summary> /// <param name="mPoints"></param> /// <returns></returns> public static float GetMaxY(List<Vector2> mPoints) { float maxY = 0; if (mPoints.Count > 0) { maxY = mPoints[0].y; foreach (Vector2 point in mPoints) { if (point.y > maxY) maxY = point.y; } } return maxY; } /// <summary> /// 获取不规则多边形重心点 /// </summary> /// <param name="mPoints"></param> /// <returns></returns> public static Vector2 GetCenterOfGravityPoint(List<Vector2> mPoints) { float area = 0.0f;//多边形面积 float gx = 0.0f, gy = 0.0f;// 重心的x、y for (int i = 1; i <= mPoints.Count; i++) { float iX = mPoints[i % mPoints.Count].x; float iY = mPoints[i % mPoints.Count].y; float nextX = mPoints[i - 1].x; float nextY = mPoints[i - 1].y; float temp = (iX * nextY - iY * nextX) / 2.0f; area += temp; gx += temp * (iX + nextX) / 3.0f; gy += temp * (iY + nextY) / 3.0f; } gx = gx / area; gy = gy / area; Vector2 v2 = new Vector2(gx, gy); return v2; }}

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