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  • 【Unity3D】Unity2D实现相机跟随物体移动(脚本可以挂在Camera上直接用)

    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class CameraFollow : MonoBehaviour
    {
        /// <summary>
        /// 
        /// CameraFollow说明
        ///
        /// 1.该脚本挂在Main Camera上;
        /// 2.游戏场景背景需要添加一个BoxCollider2D组件,碰撞体边缘根据实际背景边缘设置,然后拖到“BoxCollider2D 背景边缘”上;
        /// 3.Main Camera上需要添加一个BoxCollider2D组件,碰撞体边缘大小须调整跟窗口大小一致;
        /// 4.把主角拖到“Gameobject 主角”上;
        /// 5."主角到左右边缘最小距离"、"主角到上下边缘最小距离"可以调整判断主角到达相机边缘的最小距离;
        /// 
        /// </summary>
        private BoxCollider2D 相机边缘;
        private float x_cameralength,y_cameralength;
        private float x_相机左, x_相机右, y_相机上, y_相机下;
        private float x_背景左, x_背景右, y_背景上, y_背景下;
        private float x_主角, y_主角;
    
        public BoxCollider2D 背景边缘;
        public GameObject 主角;
        public float 主角到左右边缘最小距离;
        public float 主角到上下边缘最小距离;
    
        void Start()
        {
            相机边缘 = gameObject.GetComponent<BoxCollider2D>();
        }
    
        // Update is called once per frame
        void Update()
        {
            GetMargin();
    
            if (x_相机左 > x_背景左)
            {
                FollowLeft();
            }
            if(x_相机右 < x_背景右)
            {
                FollowRight();
            }
            if(y_相机上 < y_背景上)
            {
                FollowUp();
            }
            if(y_相机下 > y_背景下)
            {
                FollowDown();
            }
    
        }
    
    
        public void GetMargin()
        {
            x_cameralength = 相机边缘.bounds.size.x;
            y_cameralength = 相机边缘.bounds.size.y;
            x_相机左 = 相机边缘.bounds.min.x;
            x_相机右 = 相机边缘.bounds.max.x;
            y_相机下 = 相机边缘.bounds.min.y;
            y_相机上 = 相机边缘.bounds.max.y;
            x_背景左 = 背景边缘.bounds.min.x;
            x_背景右 = 背景边缘.bounds.max.x;
            y_背景下 = 背景边缘.bounds.min.y;
            y_背景上 = 背景边缘.bounds.max.y;
            x_主角 = 主角.transform.position.x;
            y_主角 = 主角.transform.position.y;
        }
    
        public void FollowLeft()
        {
            if (x_主角 - 主角到左右边缘最小距离 < x_相机左)
            {
                transform.position = new Vector3(主角.transform.position.x + x_cameralength / 2 - 主角到左右边缘最小距离, this.transform.position.y, this.transform.position.z);
            }
        }
        public void FollowRight()
        {
            if (x_主角 + 主角到左右边缘最小距离 > x_相机右)
            {
                transform.position = new Vector3(主角.transform.position.x - x_cameralength / 2 + 主角到左右边缘最小距离, this.transform.position.y, this.transform.position.z);
            }
        }
        public void FollowUp()
        {
            if (y_主角 + 主角到上下边缘最小距离 > y_相机上)
            {
                transform.position = new Vector3(this.transform.position.x, 主角.transform.position.y - y_cameralength / 2 + 主角到上下边缘最小距离, this.transform.position.z);
            }
        }
        public void FollowDown()
        {
            if (y_主角 - 主角到上下边缘最小距离 < y_相机下)
            {
                transform.position = new Vector3(this.transform.position.x, 主角.transform.position.y + y_cameralength / 2 - 主角到上下边缘最小距离, this.transform.position.z);
            }
        }
    }
    
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  • 原文地址:https://www.cnblogs.com/garychen97/p/14371509.html
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