【Unity脚本】游戏开发常用功能——以平台动作游戏为例解决“瞬移穿墙”问题

港控/mmm° 2023-06-08 14:59 33阅读 0赞

# 核心代码 #

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    /// <summary>
    /// Author：圈毛君
    /// MoveController：2019/10/18 20:50
    /// </summary>
    public class PlayerController : MonoBehaviour
    {
        public float exStepDistance = 3.0f;    // 瞬步距离（速度)
    
        private bool exStepEnabled = true;     // 能否使用瞬步
    
        public void MoveController()
        {
            if (Input.GetKey(KeyCode.A))
            {
                if (Input.GetKeyDown(KeyCode.LeftShift) && exStepEnabled)
                {
                    float tempStepDistance = exStepDistance;        // 临时瞬步距离
                    Vector3 temp = transform.position;
                    RaycastHit2D hit = Physics2D.Raycast(new Vector2(temp.x - 0.6f, temp.y), new Vector2(-1, 0), exStepDistance);   // 使用Raycast解决穿墙问题
                    if (hit)
                    {// 仅通过Raycast判断还不能解决贴墙穿越的问题，需要在碰撞事件中进一步处理
                        tempStepDistance = hit.distance;            // 重新赋值瞬步距离
                    }
                    transform.position = new Vector3(-tempStepDistance + temp.x, temp.y, temp.z);    // 虽然可以瞬步，但要解决穿墙的BUG
                }
            }
    
        private void OnCollisionEnter2D(Collision2D collision)
        {
            if(collision.gameObject.name != "Floor")    // 某些物体的碰撞不可计算在内
            {
                exStepEnabled = false;
            }
        }
    
        private void OnCollisionStay2D(Collision2D collision)
        {
            if (collision.gameObject.name != "Floor")
            {
                exStepEnabled = false;
            }
        }
    
        private void OnCollisionExit2D(Collision2D collision)
        {
            if (collision.gameObject.name != "Floor")
            {
                exStepEnabled = true;
            }
        }
    }

# 完整移动代码（包括A/D步行、双击A/D跑步、A/D+Shift瞬移） #

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    /// <summary>
    /// Author：圈毛君
    /// MoveController：2019/10/18 20:50
    /// </summary>
    public class PlayerController : MonoBehaviour
    {
        public float walkSpeed = 3.0f;         // 步行速度
        public float runSpeed = 5.0f;          // 跑步速度
        public float pressInterval = 0.5f;     // 双击按键的有效时间间隔
        public float exStepDistance = 3.0f;    // 瞬步距离（速度)
    
        private Rigidbody2D rgb;
        private SpriteRenderer sr;
        private Color originColor;
        private float pressATime;              // 按下A键时间
        private float pressDTime;
        private float releaseATime = .0f;      // 松开A键时间
        private float releaseDTime = .0f;
        private bool exStepEnabled = true;     // 能否使用瞬步
    
        private void Awake()
        {
            rgb = this.GetComponent<Rigidbody2D>();
            sr = this.GetComponent<SpriteRenderer>();
            originColor = sr.color;
        }
    
        private void Update()
        {
            MoveController();                           // 移动控制
        }
    
        public void MoveController()
        {
            if (Input.GetKeyUp(KeyCode.A))              // 不能||D，否则快速AD也算双击有效时间
            {
                releaseATime = Time.time;
                sr.color = originColor;
                rgb.velocity = new Vector2(0, 0);       // Stop
            }
    
            if (Input.GetKeyUp(KeyCode.D))
            {
                releaseDTime = Time.time;
                sr.color = originColor;
                rgb.velocity = new Vector2(0, 0);
            }
    
            if (Input.GetKey(KeyCode.A))
            {
                if (Input.GetKeyDown(KeyCode.LeftShift) && exStepEnabled)
                {
                    float tempStepDistance = exStepDistance;        // 临时瞬步距离
                    Vector3 temp = transform.position;
                    RaycastHit2D hit = Physics2D.Raycast(new Vector2(temp.x - 0.6f, temp.y), new Vector2(-1, 0), exStepDistance);   // 使用Raycast解决穿墙问题
                    if (hit)
                    {// 仅通过Raycast判断还不能解决贴墙穿越的问题，需要在碰撞事件中进一步处理
                        tempStepDistance = hit.distance;            // 重新赋值瞬步距离
                    }
                    transform.position = new Vector3(-tempStepDistance + temp.x, temp.y, temp.z);    // 虽然可以瞬步，但要解决穿墙的BUG
                }
                pressATime = Time.time;
                if(pressATime - releaseATime <= pressInterval)
                {
                    rgb.velocity = new Vector2(-runSpeed, 0);       // 跑步
                    sr.color = new Color(1, 0, 0);
                    releaseATime = Time.time;                       // 跑步状态中要持续更新松键时间
                }
                else
                    rgb.velocity = new Vector2(-walkSpeed, 0);      // 步行
            }
    
            if (Input.GetKey(KeyCode.D))
            {
                if (Input.GetKeyDown(KeyCode.LeftShift) && exStepEnabled)
                {
                    float tempStepDistance = exStepDistance;
                    Vector3 temp = transform.position;
                    RaycastHit2D hit = Physics2D.Raycast(new Vector2(temp.x + 0.6f, temp.y), new Vector2(1, 0), exStepDistance);
                    if (hit)
                    {
                        tempStepDistance = hit.distance;
                    }
                    transform.position = new Vector3(tempStepDistance + temp.x, temp.y, temp.z);
                }
                pressDTime = Time.time;
                if (pressDTime - releaseDTime <= pressInterval)
                {
                    rgb.velocity = new Vector2(runSpeed, 0);
                    sr.color = new Color(1, 0, 0);
                    releaseDTime = Time.time;
                }
                else
                    rgb.velocity = new Vector2(walkSpeed, 0);
            }
        }
    
        private void OnCollisionEnter2D(Collision2D collision)
        {
            if(collision.gameObject.name != "Floor")    // 某些物体的碰撞不可计算在内
            {
                exStepEnabled = false;
            }
        }
    
        private void OnCollisionStay2D(Collision2D collision)
        {
            if (collision.gameObject.name != "Floor")
            {
                exStepEnabled = false;
            }
        }
    
        private void OnCollisionExit2D(Collision2D collision)
        {
            if (collision.gameObject.name != "Floor")
            {
                exStepEnabled = true;
            }
        }
    }