unity3相機跟隨物體移動
阿新 • • 發佈：2018-11-26
1.向量轉四元數
Quaternion.LookRotation(dir);—>返回值就是一個四元數
2.開始旋轉
transform.rotation = Quaternion.Lerp(當前的四元數, 目標四元數, 旋轉的速度);
3.普通相機跟隨
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraMovement : MonoBehaviour {
///
/// 跟隨目標
///
public Transform followTarget;
///
/// 方向向量
///
private Vector3 dir;
private void Start()
{
//獲取方向向量
dir = transform.position - followTarget.position;
}
private void Update()
{
transform.position = dir + followTarget.position;
}
}
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraMovement : MonoBehaviour {
/// <summary> /// 俯視距離的偏移量 /// </summary> public float offset = 0.5f; /// <summary> /// 設定中間的相機位置個數 /// </summary> public int gears = 5; /// <summary> /// 跟隨目標 /// </summary> public Transform followTarget; /// <summary> /// 方向向量 /// </summary> private Vector3 dir; /// <summary> /// 待選的相機位置(觀察點) /// </summary> private Vector3[] readyPosition; /// <summary> /// 射線碰撞檢測器 /// </summary> private RaycastHit hit; /// <summary> /// 相機跟隨的移動速度 /// </summary> public int moveSpeed = 1; /// <summary> /// 相機旋轉的速度 /// </summary> public float turnSpeed = 10f; private void Start() { //獲取方向向量 dir = transform.position - followTarget.position; //例項化觀察點陣列 readyPosition = new Vector3[gears]; } private void Update() { //相機的起點--->相機最佳視角 Vector3 begin = dir + followTarget.position; //相機的終點--->相機最差視角保證能看到玩家 Vector3 end = followTarget.position + Vector3.up * (dir.magnitude - offset); //把起點和終點放到觀察點的陣列中 readyPosition[0] = begin; readyPosition[readyPosition.Length - 1] = end; //獲取相機中間點的位置 for (int i = 1; i < readyPosition.Length - 1; i++) { //求中間點各個點的座標,比例為i / (gears - 1) readyPosition[i] = Vector3.Lerp(begin, end, i / (readyPosition.Length - 1)); } //備選方案--->前面所有的觀察點都看不到玩家 //都看不到就把相機放到最佳視角 Vector3 watchPoint = begin; //遍歷觀察點陣列,挑選我們最佳觀察點 for (int i = 0; i < readyPosition.Length; i++) { if (CheckWatchPoint(readyPosition[i])) { //設定觀察點 watchPoint = readyPosition[i]; //得到觀察點退出迴圈 break; } } //相機平滑移動到最佳觀察點 transform.position = Vector3.Lerp(transform.position, watchPoint, Time.deltaTime * moveSpeed); /* //旋轉的不是很平滑 //相機旋轉到最佳角度看向玩家 transform.LookAt(followTarget); */ //獲取方向向量 Vector3 lookDir = followTarget.position - watchPoint; //獲取四元數 Quaternion lookQua = Quaternion.LookRotation(lookDir); //平滑轉向玩家 transform.rotation = Quaternion.Lerp(transform.rotation, lookQua, Time.deltaTime * turnSpeed); //固定相機y軸z軸的旋轉 transform.eulerAngles = new Vector3(transform.eulerAngles.x, 0, 0); } /// <summary> /// 檢測觀察點是否可以看到目標 /// </summary> /// <param name="point">待選的觀察點</param> /// <returns><c>true</c>看得到<c>false</c>看不到</returns> bool CheckWatchPoint(Vector3 point) { if (Physics.Raycast(point,followTarget.position - point,out hit)) { //如果射線檢測到的是玩家 if (hit.collider.tag == "Player") { return true; } } return false; }
}
相機跟隨一直觀察角色背部
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraFollow : MonoBehaviour {
public Transform target;
public float distanceUp = 5f;
public float distanceAway = 5f;
public float smooth = 2f;//位置平滑移動值
public float camDepthSmooth = 2f;
// Use this for initialization
void Start()
{
}
// Update is called once per frame
void Update()
{
// 滑鼠軸控制相機的遠近
if ((Input.mouseScrollDelta.y < 0 && Camera.main.fieldOfView >= 3) || Input.mouseScrollDelta.y > 0 && Camera.main.fieldOfView <= 80)
{
Camera.main.fieldOfView += Input.mouseScrollDelta.y * camDepthSmooth * Time.deltaTime;
}
}
void LateUpdate()
{
//相機的位置
Vector3 disPos = target.position + Vector3.up * distanceUp - target.forward * distanceAway;
transform.position = Vector3.Lerp(transform.position, disPos, Time.deltaTime * smooth);
//相機的角度
transform.LookAt(target.position);
}
}