摄像机按照直线路径进行漫游

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Roam : MonoBehaviour
{

public Transform wayRoot;
public GameObject camRoot;
public List<Vector3> wayPoints = new List<Vector3>();
MoveMode mm = MoveMode.move;
int wayIndex=0;
float rotProgress = 0;
public float rotateSpeed = 2f;
Quaternion qTarget;
Quaternion lastQ;//相机
public float moveSpeed = 2.2f;
bool isNeedContrlRotation = false;

void Awake()
{
InitWayPoints();
camRoot.transform.position = wayPoints[0];
CaculateRoteData(0);
camRoot.transform.localEulerAngles = new Vector3(0, -Quaternion.Angle(lastQ, qTarget), 0);
}

void Update()
{
if (wayPoints.Count < 2)
Debug.LogError("漫游的路径点数设置小于2");
switch (mm)
{
case MoveMode.rotate://先转到下一个点
if (isNeedContrlRotation)
{
camRoot.transform.rotation = Quaternion.Lerp(lastQ, qTarget, rotProgress);
rotProgress += Time.deltaTime * rotateSpeed;
if (rotProgress >= 1)
{
mm = MoveMode.move;//转完了，开始移动
}
}
break;
case MoveMode.move://开始移动
float nextPointDist = 0;
if (wayIndex < wayPoints.Count - 1)//没有到最后一个点
{
nextPointDist = Vector3.Distance(camRoot.transform.position, wayPoints[wayIndex + 1]);
Vector3 dir = (wayPoints[wayIndex + 1] - wayPoints[wayIndex]).normalized;
camRoot.transform.position += Time.deltaTime * dir * moveSpeed;
}

if (wayIndex == wayPoints.Count - 1)
{
nextPointDist = Vector3.Distance(camRoot.transform.position, wayPoints[0]);
Vector3 dir = (wayPoints[0] - wayPoints[wayIndex]).normalized;
camRoot.transform.position += Time.deltaTime * dir * moveSpeed;
}

if (nextPointDist < 0.1f)//换到下一个点
{
mm = MoveMode.rotate;
isNeedContrlRotation = true;
rotProgress = 0;
wayIndex++;
if (wayIndex >= wayPoints.Count)
{
wayIndex = 0;
camRoot.transform.position = wayPoints[0];
}
CaculateRoteData(wayIndex);
}
break;
}
}

void CaculateRoteData(int index)
{
lastQ = camRoot.transform.rotation;
Vector3 dir = Vector3.zero;
if (index == wayPoints.Count - 1)
{
dir = wayPoints[0] - wayPoints[index];
}
else
{
dir = wayPoints[index + 1] - wayPoints[index];
}
qTarget = Quaternion.LookRotation(dir);
}

void InitWayPoints()
{
if (wayRoot != null && wayRoot.childCount > 0)
{
for (int i = 0; i < wayRoot.childCount; i++)
{
wayPoints.Add(wayRoot.GetChild(i).position);
}
}
}

public enum MoveMode
{
move,
rotate
}

void OnDrawGizmos()
{
if (wayRoot != null && wayRoot.childCount > 0)
{
int c = wayRoot.childCount;
for (int i = 0; i < c - 1; i++)
{
Debug.DrawLine(wayRoot.GetChild(i).position, wayRoot.GetChild(i + 1).position, Color.green);
}
Debug.DrawLine(wayRoot.GetChild(wayRoot.childCount - 1).position, wayRoot.GetChild(0).position, Color.green);
}
}
}