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前篇：Unity实战案例全解析：RTS游戏的框选和阵型功能（3）生成范围检测框 +重置框选操作-CSDN博客

本案例来源于unity唐老狮，有兴趣的小伙伴可以去泰克在线观看该课程

我只是对重要功能进行分析和做出笔记分享，并未无师自通，吃水不忘打井人

本案例的实现流程图 

本节实现效果

分析

选中士兵数量和布阵方式

如何实现呢？如果没有分析出算法就用switch语句一个一个去规定，如果分析出了算法直接根据框选中的士兵数量实现即可

容易忽略的关键变量

士兵前进的方向该如何确定？

可以根据当前的位置frontPos指向target

如果是第一移动，那frontPos就设置为当前士兵的位置

当下次一达到目的地以后，就将上一个位置 =当前的目标位置即可

最后每一次重置框选后，可以重置一下frontPo

  nowRigth = Quaternion.Euler(0, 90, 0) * nowForward;

s

 

 计算布局函数

这里面定义了一个偏移量用来设置士兵之间的间隔

   //士兵之间的间隔距离private float soldierOffset = 3;

还定义了一个当前朝向的右向量用来计算位置

    /// <summary>/// 根据鼠标点击的目标点 计算出 阵型的其它点位/// </summary>/// <param name="targetPos"></param>/// <returns></returns>private List<Vector3> GetTargetPos(Vector3 targetPos){//需要计算目标点 的 面朝向和 右朝向Vector3 nowForward = Vector3.zero;Vector3 nowRigth = Vector3.zero;//是一批士兵 上一次已经移动过一次了 有上一次的位置if(frontPos != Vector3.zero)nowForward = (targetPos - frontPos).normalized;//有上一次的点 就直接计算else//没有上一次的点 就用第一个士兵的位置 作为上一次的点来计算nowForward = (targetPos - soldierObjs[0].transform.position).normalized;//根据面朝向 得到右朝向 旋转y轴 90度nowRigth = Quaternion.Euler(0, 90, 0) * nowForward;List<Vector3> targetsPos = new List<Vector3>();switch (soldierObjs.Count){case 1:targetsPos.Add(targetPos);break;case 2:targetsPos.Add(targetPos + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowRigth * soldierOffset / 2);break;case 3:targetsPos.Add(targetPos);targetsPos.Add(targetPos + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowRigth * soldierOffset);break;case 4:targetsPos.Add(targetPos + nowForward * soldierOffset / 2 - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset / 2 + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowForward * soldierOffset / 2 - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowForward * soldierOffset / 2 + nowRigth * soldierOffset / 2);break;case 5:targetsPos.Add(targetPos + nowForward * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset / 2 - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset / 2 + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset / 2 - nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset / 2 + nowRigth * soldierOffset);break;case 6:targetsPos.Add(targetPos + nowForward * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset / 2 - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset / 2 + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset / 2 - nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset / 2 + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset / 2);break;case 7:targetsPos.Add(targetPos + nowForward * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowRigth * soldierOffset);targetsPos.Add(targetPos);targetsPos.Add(targetPos - nowForward * soldierOffset);break;case 8:targetsPos.Add(targetPos + nowForward * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowRigth * soldierOffset);targetsPos.Add(targetPos);targetsPos.Add(targetPos - nowForward * soldierOffset - nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset + nowRigth * soldierOffset);break;case 9:targetsPos.Add(targetPos + nowForward * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowRigth * soldierOffset);targetsPos.Add(targetPos + nowRigth * soldierOffset);targetsPos.Add(targetPos);targetsPos.Add(targetPos - nowForward * soldierOffset - nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset + nowRigth * soldierOffset);targetsPos.Add(targetPos - nowForward * soldierOffset);break;case 10:targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowForward * soldierOffset - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowForward * soldierOffset + nowRigth * soldierOffset * 1.5f);break;case 11:targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowForward * soldierOffset - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowForward * soldierOffset + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowForward * soldierOffset);break;case 12:targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowForward * soldierOffset - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos + nowForward * soldierOffset + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos + nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowForward * soldierOffset - nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowForward * soldierOffset + nowRigth * soldierOffset * 1.5f);targetsPos.Add(targetPos - nowForward * soldierOffset - nowRigth * soldierOffset / 2);targetsPos.Add(targetPos - nowForward * soldierOffset + nowRigth * soldierOffset / 2);break;}//计算完毕后  记录当前次的位置 frontPos = targetPos;return targetsPos;}
}

实际移动函数 

使用射线检测得到目标点target

   if( Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hitInfo, 1000, 1 << LayerMask.NameToLayer("Ground")) ){//通过目标点 计算出 真正的 阵型目标点//计算目标点List<Vector3> targetsPos = GetTargetPos(hitInfo.point);//命令士兵朝向各自的目标点 移动for (int i = 0; i < soldierObjs.Count; i++)soldierObjs[i].Move(targetsPos[i]);}