Unity 使用this关键字进行函数拓展 - Vector3
【摘要】
using UnityEngine;using System.Collections.Generic; namespace SK.Framework{ /// <summary> /// 三维向量相关拓展 /// </summary> public static class Vector3...
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using UnityEngine;
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using System.Collections.Generic;
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namespace SK.Framework
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{
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/// <summary>
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/// 三维向量相关拓展
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/// </summary>
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public static class Vector3Extension
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{
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/// <summary>
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/// 将xyz值放入一个长度为3的float数组中
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/// </summary>
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/// <param name="self">三维向量</param>
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/// <returns>float数组</returns>
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public static float[] ToArray(this Vector3 self)
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{
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float[] retArray = new float[3];
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retArray[0] = self.x;
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retArray[1] = self.y;
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retArray[2] = self.z;
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return retArray;
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}
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/// <summary>
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/// 转四元数
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/// </summary>
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/// <param name="self">三维向量</param>
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/// <returns>四元数</returns>
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public static Quaternion ToQuaternion(this Vector3 self)
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{
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return Quaternion.Euler(self);
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}
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/// <summary>
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/// 获取最小值
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/// </summary>
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/// <param name="self">三维向量列表</param>
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/// <param name="min">最小值</param>
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/// <returns>三维向量列表</returns>
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public static List<Vector3> GetMin(this List<Vector3> self, out Vector3 min)
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{
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min = self[0];
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for (int i = 1; i < self.Count; i++)
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{
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min = Vector3.Min(min, self[i]);
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}
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return self;
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}
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/// <summary>
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/// 获取最大值
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/// </summary>
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/// <param name="self">三维向量列表</param>
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/// <param name="max">最大值</param>
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/// <returns>三维向量列表</returns>
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public static List<Vector3> GetMax(this List<Vector3> self, out Vector3 max)
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{
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max = self[0];
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for (int i = 1; i < self.Count; i++)
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{
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max = Vector3.Max(max, self[i]);
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}
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return self;
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}
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/// <summary>
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/// 计算角度-叉乘
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/// </summary>
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/// <param name="self">三维向量</param>
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/// <param name="target">目标三维向量</param>
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/// <returns>角度值</returns>
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public static float GetAngle(this Vector3 self, Vector3 target)
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{
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return Mathf.Acos(Vector3.Dot(self.normalized, target.normalized)) * Mathf.Rad2Deg;
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}
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/// <summary>
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/// 生成多边形Mesh网格
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/// </summary>
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/// <param name="self">多边形顶点数组</param>
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/// <returns>网格</returns>
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public static Mesh GenerateMesh(this Vector3[] self)
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{
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Mesh retMesh = new Mesh();
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List<int> triangles = new List<int>();
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for (int i = 0; i < self.Length - 1; i++)
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{
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triangles.Add(i);
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triangles.Add(i + 1);
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triangles.Add(self.Length - i - 1);
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}
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retMesh.vertices = self;
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retMesh.triangles = triangles.ToArray();
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retMesh.RecalculateBounds();
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retMesh.RecalculateNormals();
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return retMesh;
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}
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/// <summary>
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/// 生成贝塞尔曲线
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/// </summary>
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/// <param name="self">控制点</param>
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/// <param name="startPoint">贝塞尔曲线起点</param>
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/// <param name="endPoint">贝塞尔曲线终点</param>
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/// <param name="count">贝塞尔曲线点个数</param>
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/// <returns>组成贝塞尔曲线的点集合</returns>
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public static Vector3[] GenerateBeizer(this Vector3 self, Vector3 startPoint, Vector3 endPoint, int count)
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{
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Vector3[] retValue = new Vector3[count];
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for (int i = 1; i <= count; i++)
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{
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float t = i / (float)count;
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float u = 1 - t;
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float tt = Mathf.Pow(t, 2);
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float uu = Mathf.Pow(u, 2);
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Vector3 point = uu * startPoint;
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point += 2 * u * t * self;
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point += tt * endPoint;
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retValue[i - 1] = point;
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}
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return retValue;
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}
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/// <summary>
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/// 与目标点的距离
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/// </summary>
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/// <param name="self">Vector3</param>
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/// <param name="target">目标点</param>
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/// <returns>距离</returns>
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public static float Distance(this Vector3 self, Vector3 target)
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{
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return Vector3.Distance(self, target);
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}
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/// <summary>
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/// 与目标点的中点
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/// </summary>
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/// <param name="self">Vector3</param>
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/// <param name="target">目标点</param>
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/// <returns>中点</returns>
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public static Vector3 Half(this Vector3 self, Vector3 target)
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{
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return (self + target) / 2.0f;
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}
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/// <summary>
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/// 指向目标点的方向
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/// </summary>
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/// <param name="self">Vector3</param>
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/// <param name="target">目标点</param>
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/// <returns>方向</returns>
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public static Vector3 Direction(this Vector3 self, Vector3 target)
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{
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return (target - self).normalized;
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}
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/// <summary>
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/// 判断目标点是否在指定区域内
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/// </summary>
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/// <param name="self">目标点</param>
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/// <param name="points">区域各顶点</param>
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/// <param name="height">区域高度</param>
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/// <returns>是否在区域内</returns>
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public static bool IsInRange(this Vector3 self, Vector3[] points, float height)
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{
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if (self.y > height || self.y < -height) return false;
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var comparePoint = (points[0] + points[1]) * 0.5f;
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comparePoint += (comparePoint - self).normalized * 10000;
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int count = 0;
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for (int i = 0; i < points.Length; i++)
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{
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var a = points[i % points.Length];
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var b = points[(i + 1) % points.Length];
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var crossA = Mathf.Sign(Vector3.Cross(comparePoint - self, a - self).y);
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var crossB = Mathf.Sign(Vector3.Cross(comparePoint - self, b - self).y);
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if (Mathf.Approximately(crossA, crossB)) continue;
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var crossC = Mathf.Sign(Vector3.Cross(b - a, self - a).y);
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var crossD = Mathf.Sign(Vector3.Cross(b - a, comparePoint - a).y);
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if (Mathf.Approximately(crossC, crossD)) continue;
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count++;
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}
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return count % 2 == 1;
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}
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/// <summary>
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/// 获取点坐标数组
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/// </summary>
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/// <param name="self">点列表</param>
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/// <returns>点坐标数组</returns>
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public static Vector3[] GetPositions(this List<Transform> self)
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{
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Vector3[] retArray = new Vector3[self.Count];
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for (int i = 0; i < self.Count; i++)
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{
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retArray[i] = self[i].position;
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}
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return retArray;
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}
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/// <summary>
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/// 获取点坐标数组
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/// </summary>
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/// <param name="self">点数组</param>
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/// <returns>点坐标数组</returns>
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public static Vector3[] GetPositions(this Transform[] self)
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{
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Vector3[] retArray = new Vector3[self.Length];
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for (int i = 0; i < self.Length; i++)
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{
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retArray[i] = self[i].position;
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}
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return retArray;
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}
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}
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}
文章来源: coderz.blog.csdn.net，作者：CoderZ1010，版权归原作者所有，如需转载，请联系作者。
原文链接：coderz.blog.csdn.net/article/details/116755802
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