需求 绘制圆角

核心函数

     /// <summary>/// 点ABC 形成的角度必须为90° 点c为中间的点/// </summary>/// <param name="a"></param>/// <param name="b"></param>/// <param name="c"></param>/// <param name="radius">圆角半径，不可为负数</param>/// <param name="count">圆角数量，越多则越圆滑</param>/// <returns></returns>public static Vector3[] Rounded(Vector3 a, Vector3 b, Vector3 c, float radius, int count){Vector3 ca = (a - c).normalized;Vector3 cb = (b - c).normalized;Vector3 d = c + ca * radius + cb * radius;Vector3 a1 = c + ca * radius;Vector3 b1 = c + cb * radius;Vector3 db1 = (b1 - d).normalized;Vector3 cross = Vector3.Cross(ca, cb);List<Vector3> points = new List<Vector3>();points.Add(b);for (int i = 0; i <= count; i++){Vector3 p = d + Quaternion.AngleAxis((float)i / (float)count * 90, cross) * db1 * radius;points.Add(p);}points.Add(a);return points.ToArray();}

测试代码

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;public class Test : MonoBehaviour
{public float Radius = 1;public int Count = 25;void Start(){}// Update is called once per framevoid Update(){}private void OnDrawGizmos(){Vector3[] v = Rounded(Vector3.up * 2, Vector3.right * 2, Vector3.zero, Radius, Count);for (int i = 0; i < v.Length - 1; i++){Gizmos.DrawLine(v[i], v[i + 1]);Gizmos.DrawSphere(v[i], 0.01f);}}/// <summary>/// 点ABC 形成的角度必须为90° 点c为中间的点/// </summary>/// <param name="a"></param>/// <param name="b"></param>/// <param name="c"></param>/// <param name="radius">圆角半径，不可为负数</param>/// <param name="count">圆角数量，越多则越圆滑</param>/// <returns></returns>public static Vector3[] Rounded(Vector3 a, Vector3 b, Vector3 c, float radius, int count){Vector3 ca = (a - c).normalized;Vector3 cb = (b - c).normalized;Vector3 d = c + ca * radius + cb * radius;Vector3 a1 = c + ca * radius;Vector3 b1 = c + cb * radius;Vector3 db1 = (b1 - d).normalized;Vector3 cross = Vector3.Cross(ca, cb);List<Vector3> points = new List<Vector3>();points.Add(b);for (int i = 0; i <= count; i++){Vector3 p = d + Quaternion.AngleAxis((float)i / (float)count * 90, cross) * db1 * radius;points.Add(p);}points.Add(a);return points.ToArray();}
}