unity的摄像机脚本

骑猪看日落 2023-08-17 15:42 131阅读 0赞

using UnityEngine;
    using System.Collections;
    using UnityEngine.EventSystems;
    
    public class MainCamera : MonoBehaviour
    {
        public Transform target;
        public float targetHeight = 1.2f;
        public float distance = 8.0f;
        public float offsetFromWall = 0.1f;
    
        public float maxDistance = 15;
        public float minDistance = 3f;
    
        public float xSpeed = 200.0f;
        public float ySpeed = 200.0f;
    
        public int yMinLimit = 0;
        public int yMaxLimit = 80;
    
        public int zoomRate = 40;
    
        public float rotationDampening = 3.0f;
        public float zoomDampening = 5.0f;
    
        public LayerMask collisionLayers = -1;
    
        private float xDeg = -53.2f;
        private float yDeg = 22.4f;
        private float currentDistance;
        private float desiredDistance;
        private float correctedDistance;
    
        void Start()
        {
            currentDistance = distance; //当前距离
            desiredDistance = distance; //默认距离
            correctedDistance = distance; //需要修正的距离
        }
    
        void LateUpdate()
        {
            target = GameObject.FindGameObjectWithTag("Player").transform;
            Vector3 vTargetOffset;
            if (!target)
            {
                return;
            }
            if (Input.GetMouseButton(1))
            {
                xDeg += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
                yDeg -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
            }
            yDeg = ClampAngle(yDeg, yMinLimit, yMaxLimit);
            xDeg = ClampAngle(xDeg, -360, 360);
            Quaternion rotation = Quaternion.Euler(yDeg, xDeg, 0);
    
            desiredDistance -= Input.GetAxis("Mouse ScrollWheel") * Time.deltaTime * zoomRate * Mathf.Abs(desiredDistance); //滚珠移动摄像头与人的距离
            correctedDistance = desiredDistance;
    
            vTargetOffset = new Vector3(0, -targetHeight, 0);
            Vector3 position = target.position - (rotation * Vector3.forward * desiredDistance + vTargetOffset); //摄像机与人之间的向量
    
            RaycastHit collisionHit;
            Vector3 trueTargetPosition = new Vector3(target.position.x, target.position.y + targetHeight, target.position.z); //修改人身上的射线发出点坐标
    
            bool isCorrected = false;
            if (Physics.Linecast(trueTargetPosition, position, out collisionHit, collisionLayers.value))
            {
                correctedDistance = Vector3.Distance(trueTargetPosition, collisionHit.point) - offsetFromWall;
                isCorrected = true;
            }
    
            currentDistance = !isCorrected || correctedDistance > currentDistance ? Mathf.Lerp(currentDistance, correctedDistance, Time.deltaTime * zoomDampening) : correctedDistance;
            currentDistance = Mathf.Clamp(currentDistance, minDistance, maxDistance);
            position = target.position - (rotation * Vector3.forward * currentDistance + vTargetOffset);
            transform.rotation = rotation;
            transform.position = position;
        }
    
        private static float ClampAngle(float angle, float min, float max)
        {
            if (angle < -360)
                angle += 360;
            if (angle > 360)
                angle -= 360;
            return Mathf.Clamp(angle, min, max);
        }
    }

转载于:https://www.cnblogs.com/allyh/p/11487794.html