unity-main camera 前进后退左右转弯脚本_unity 右转效果

用键盘“上-下-左-右”四个建实现unity中camera的“前进-后退-左转-右转”的功能。此处只是考虑了水平方向上的移动，（如果涉及到垂直方向那岂不是可以上天入地，不太实际。）但如果要实现垂直就要用到高中数学的稍稍复杂的三维计算了，以后有时间再补吧。

感觉三维图不太好画，所以就不讲解原理了。直接上代码。

新建一个名为CameraController的cs文件：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class CameraController : MonoBehaviour
{
    public float speed_angel;//转弯的角速度
    public float speed_move;//前进-后退速度
    private Vector3 vr;//辅助计算的一个向量
    private Vector3 rota;//可以不用的，就是记录当前rotation
    private Vector3 v;//一个有三维方向的矢量速度
    // Start is called before the first frame update
    void Start()
    {
        //初始化，不在定义的时候初始化主要是因为不懂unity的实时更新机制
        speed_angel = 5.0f;
        speed_move = 1.0f;
        vr = new Vector3(0, 1.0f, 0);
        rota = new Vector3(0, 0, 0);
        v = new Vector3(0, 0, 1);
 
        transform.rotation = Quaternion.Euler(rota);
    }
 
    // Update is called once per frame
    void Update()
    {
        //获取左-右键按下的时长，就是左右转的角度
        float righ = Input.GetAxis("Horizontal")  * speed_angel;
        //获取上-下键按下的时长，就是前进后退的距离
        float forward = Input.GetAxis("Vertical") * speed_move;
 
        //物体进行旋转操作
        transform.Rotate(vr*righ);
 
        //速度方向进行改变
        v.z = Mathf.Cos(rota.y/180);
        v.x = Mathf.Sin(rota.y/180);
 
        //前进后退移动
        Vector3 move = v * forward;
        transform.Translate(move);
    }
 
 
}

把这个CameraController.cs挂载到main camera下就行了。

补上一个可以鼠标控制改变视角的：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class CameraController : MonoBehaviour
{
    public float speed_angel = 5.0f;
    public float speed_move = 2.0f;
    private float aup=0.0f;
    private Vector3 vr = new Vector3(0,1.0f,0);
    private Vector3 rota = new Vector3(0, 0, 0);
    private Vector3 v = new Vector3(0, 0, 1);
    private float PI = Mathf.Acos(-1.0f);
    // Start is called before the first frame update
    void Start()
    {
        speed_angel = 5.0f;
        speed_move = 1.0f;
        vr = new Vector3(0, 1.0f, 0);
        rota = new Vector3(0, 0, 0);
        v = new Vector3(0, 0, 1);
 
        transform.rotation = Quaternion.Euler(rota);
    }
 
    // Update is called once per frame
    void Update()
    {
        float righ = Input.GetAxis("Horizontal")  * speed_angel;
        float forward = Input.GetAxis("Vertical") * speed_move;
        float up = 0;
        if (Input.GetKey(KeyCode.Mouse0))
        {
            float horizontalSpeed = 2.0f;
            float verticalSpeed = 2.0f;
            float v = horizontalSpeed * Input.GetAxis("Mouse X") * speed_angel;
            up = verticalSpeed * Input.GetAxis("Mouse Y");
            aup += up;
            aup = (aup > 80 ? 80 : aup);
            aup = (aup < -80 ? -80 : aup);
            righ -= v;
        }
        transform.Rotate(vr*righ);
        rota.y+=vr.y*righ;
 
        v.z = Mathf.Cos(aup/180*PI);
        v.y = Mathf.Sin(aup/180*PI);
 
        transform.rotation = Quaternion.Euler(new Vector3(aup, rota.y, 0.0f));
        rota = new Vector3(aup, rota.y, 0.0f);
 
        Vector3 move = v * forward;
        transform.Translate(move);
    }
 
 
}