using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraFollowss : MonoBehaviour {
//跟随目标
//先确定相机围绕哪个物体进行旋转，缩放，平移;也就是需要确定相机的父物体
//先写右键旋转（相机）,确定相机旋转的速度
public Transform target;
//旋转的初始角度
private float x = 0.0f;
private float y = 0.0f;
//相机旋转的速率
private float rSpeed = 10.0f;
//获取相机Transform对象
private Transform cam;
//相机距离目标物体的起始距离(距离设置为负值，是因为相机是在目标物体的正后方)
private float distance = -5;
//相机距离的物体的最近和最远距离
private float minDistance = -1;
private float maxDistance = -30;
//初始位置
private float camPostion_x = 0;
private float camPostion_y = 0;
void Awake()
{
transform.position = target.position;
transform.rotation = Quaternion.Euler(y, x, 0);
cam = GameObject.Find("Main Camera").transform;
cam.localPosition = new Vector3(0, 0, distance);
}
void Update()
{
if (Input.GetMouseButton(1))
{
//右键按下
x += Input.GetAxis("Mouse X") * rSpeed;
y -= Input.GetAxis("Mouse Y") * rSpeed;
x = ClampAngle(x, -360, 360);
y = ClampAngle(y, -70, 70);
var rotation = Quaternion.Euler(y, x, 0);
transform.rotation = rotation;
}
else if (Input.GetAxis("Mouse ScrollWheel") != 0)
{
//中键滚动缩放
distance += Input.GetAxis("Mouse ScrollWheel") * 5;
distance = Mathf.Clamp(distance, maxDistance, minDistance);
cam.localPosition = new Vector3(camPostion_x, camPostion_y, distance);
}
//中键按下平移
if (Input.GetMouseButton(2))
{
camPostion_x -= Input.GetAxis("Mouse X") * 0.04f;
camPostion_y -= Input.GetAxis("Mouse Y") * 0.04f;
cam.localPosition = new Vector3(camPostion_x, camPostion_y, distance);
}
}
static float ClampAngle(float angle, float minAngle, float maxAngle)
{
if (angle < -360)
angle += 360;
if (angle > 360)
angle -= 360;
return Mathf.Clamp(angle, minAngle, maxAngle);
}
}