unity第三视角移动,摄像机跟随

1、在以前的仿真项目中用到了第三人称视角的移动， W、S、A、D控制角色的前后左右移动，摄像机跟随角色移动，并且摄像 机做了缓冲处理。鼠标右键长按旋转控制镜头旋转，中键滑轮控制镜头拉进拉远。分为两个脚本，CharacterThirdControl 挂在角色身上，CameraThirdControl挂在跟随摄像机身上。角色的标签设置为 Player。跟随摄像机为主摄像机（可以根据 自己需求改变）。下面直接贴代码，代码中已有注释： using Uni tyE ngine; using System.Collecti ons; RequireComp onen t(typeof(CharacterC o

2、n troller) public classCharacterThirdControl : MonoBehaviour Tran sform myCamera; 跟随摄像机 private CharacterC on troller cc; Vector3 playerDirect;/ 角色的目标方向 Vector3 correctDirect; float perError = 0.2f; float speed = 0.1f; Vector3 front;/ 前 为了矫正计算方向向量的误差 /误差与摄像机缓冲存在关系 速度与Update的帧数有关，同样数据帧数越多，速度越快 Vector

3、3 back; / 后 Vector3 left;左 Vector3 right; / 右 / Use this for in itializati on void Start() myCamera = Camera.main.transform; /将主摄像机设置为跟随摄像机 front = Vector3.zero; back = Vector3.zero; left = Vector3.zero; right = Vector3.zero; correctDirect = Vector3.zero; cc = tra nsform.GetComp onen t(); void LateU

4、pdate() PlayerCo ntrol(); / /计算方向向量函数 / private void CalculateDirection() Vector3 temp = tran sform.positi on - myCamera.positi on; temp = new Vector3(temp.x, 0, temp.z); front = temp; if (correctDirect!=Vector3.zero back = -front; left = new Vector3(-front.z, 0, front.x); right = -left; correctDire

5、ct = front; / / 控制角色移动 / private void PlayerControl() playerDirect = new Vector3(0, 0, 0); CalculateDirection(); / 计算角色的方向 if (Input.GetAxis( Horizontal ) 0) /右 playerDirect = right; if (Input.GetAxis( Vertical ) 0) if (Input.GetAxis( Horizontal ) 0) /前右 playerDirect = front + right; else playerDire

6、ct = front;/前 if (Input.GetAxis( Vertical ) 0) if (Input.GetAxis( Horizontal ) 0) /后右 playerDirect = back + right; else playerDirect = back;/后 if (playerDirect != Vector3.zero) playerDirect += transform.position; MoveSpeed(playerDirect); / / 调整角色方向，控制角色移动 / private void MoveSpeed(Vector3 direct) tra

7、nsform.LookAt( new Vector3(direct.x, transform.position.y, direct.z); cc.Move(transform.forward * speed); using UnityEngine; using System.Collections; public classCameraThirdControl : MonoBehaviour Range(0, 1) SerializeField float target_offsety = 0.6f;/ 高度差 Range(0, 90) SerializeField float initRot

8、ate = 15f;/ 摄像机角度 Range(2, 10) SerializeField float DISTANCE_DEAFULT = 3.2f;/ 设置摄像机与物体之间的距离 Transform target; / 摄像机跟随的角色 private float distance; private Vector3 playerTarget; private float lastRotate; / Use this for initialization void Start() lastRotate = initRotate; distance = DISTANCE_DEAFULT;/设置

9、摄像机与角色的距离 target = GameObject.FindGameObjectWithTag(Player).transform;/找到角色 playerTarget = new Vector3(target.position.x, target.position.y + target_offsety, target.position.z); / 设置摄像机对着角色的位置 Quaternion cr = Quaternion.Euler(initRotate, transform.eulerAngles.y, 0);/设置摄像机与角色之 间的角度 /计算摄像机的位置 Vector3

10、positon = playerTarget; positon += cr * Vector3.back * distance; transform.position = positon; transform.rotation = target.rotation; transform.LookAt(playerTarget); / Update is called once per frame void Update() /鼠标右键控制镜头转动 if (Input.GetMouseButton(1) transform.RotateAround(playerTarget, Vector3.up

11、, Input.GetAxis( Mouse X )*3f); /更新摄像机的位置角度等信息 void LateUpdate() playerTarget = new Vector3(target.position.x, target.position.y + target_offsety, target.position.z); Quaternion cr = Quaternion.Euler(initRotate, transform.eulerAngles.y, 0); Vector3 positon = playerTarget + (cr * Vector3.back * dista

12、nce); RaycastHit hits = Physics.RaycastAll( new Ray(playerTarget, (positon - playerTarget).normalized); distance = DISTANCE_DEAFULT; if (hits.Length 0) RaycastHit stand = new RaycastHit(); float maxDistance = float .MaxValue; foreach (RaycastHit hit in hits) if (!hit.collider.isTrigger positon = pla

13、yerTarget + (cr * Vector3.back * distance); transform.position = Vector3.Lerp(transform.position, positon, 0.5f);/用于摄像机的缓冲， 与误差 存在关系 Debug.DrawRay(playerTarget, positon - playerTarget, Color.red); if (lastRotate != initRotate) transform.LookAt(playerTarget); lastRotate = initRotate; /鼠标中键控制镜头远近 float fov = this.GetComponent().fieldOfView; fov -= Input.Get