【unity实战】使用旧输入系统Input Manager 写一个 2D 平台游戏玩家控制器——包括移动、跳跃、滑墙、蹬墙跳

最终效果

素材下载

人物

https://rvros.itch.io/animated-pixel-hero

环境

https://bardent.itch.io/the-bardent-asset-pack

https://brullov.itch.io/oak-woods

简单绘制环境

参考：【推荐100个unity插件之14】Unity2D TileMap的探究（最简单，最全面的TileMap使用介绍）

角色移动跳跃

新增PlayerController

public class PlayerController : MonoBehaviour
{private float movementInputDirection; // 水平输入方向private bool isFacingRight = true; // 玩家是否面向右侧private Rigidbody2D rb;public float movementSpeed = 10.0f; // 移动速度public float jumpForce = 16.0f; // 跳跃力度void Start(){rb = GetComponent<Rigidbody2D>();}void Update(){CheckInput(); // 检查输入CheckMovementDirection();}private void FixedUpdate(){ApplyMovement(); // 应用移动}// 检查玩家面朝的方向private void CheckMovementDirection(){if (isFacingRight && movementInputDirection < 0){Flip(); // 翻转角色}else if (!isFacingRight && movementInputDirection > 0){Flip(); // 翻转角色}}// 检查输入private void CheckInput(){movementInputDirection = Input.GetAxisRaw("Horizontal"); // 获取水平输入if (Input.GetButtonDown("Jump")){Jump(); // 如果按下跳跃键，则执行跳跃}}// 跳跃private void Jump(){rb.velocity = new Vector2(rb.velocity.x, jumpForce); // 设置 y 方向的速度为跳跃力度}// 移动private void ApplyMovement(){rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y); // 设置 x 方向的速度}// 翻转角色private void Flip(){isFacingRight = !isFacingRight; // 改变面向方向的标志transform.Rotate(0.0f, 180.0f, 0.0f); // 旋转角色}
}

配置

效果

视差和摄像机跟随效果

参考：【unity小技巧】Unity实现视差效果与无限地图

新增CameraController代码

public class CameraController : MonoBehaviour
{public Transform target;//玩家的位置public Transform farBackground, middleBackground, frontBackground;//远的背景和中间背景的位置private Vector2 lastPos;//最后一次的相机位置void Start(){lastPos = transform.position;//记录相机的初始位置}void Update(){//将相机的位置设置为玩家的位置，但限制在一定的垂直范围内//transform.position = new Vector3(target.position.x, target.position.y + 1f, transform.position.z);//计算相机在上一帧和当前帧之间移动的距离Vector2 amountToMove = new Vector2(transform.position.x - lastPos.x, transform.position.y - lastPos.y);//根据相机移动的距离，移动远背景和中间背景的位置farBackground.position += new Vector3(amountToMove.x, amountToMove.y, 0f);middleBackground.position += new Vector3(amountToMove.x * 0.9f, amountToMove.y, 0f);frontBackground.position += new Vector3(amountToMove.x * 0.5f, amountToMove.y, 0f);lastPos = transform.position;//更新最后一次的相机位置}
}

Map代码

public class Map : MonoBehaviour
{[Header("无限地图")]private GameObject mainCamera;//主摄像机对象private float mapwidth;//地图宽度private float totalwidth;//总地图宽度public int mapNums;//地图重复的次数void Start(){mainCamera = GameObject.FindGameObjectWithTag("MainCamera");//查找标签为"MainCamera'"的对象并赋值mapwidth = GetComponent<SpriteRenderer>().sprite.bounds.size.x;//通过SpriteRenderer获得图像宽度totalwidth = mapwidth * mapNums;//计算总地图宽度}void FixedUpdate(){Vector3 tempPosition = transform.position;//获取当前位置if (mainCamera.transform.position.x > transform.position.x + totalwidth / 2){tempPosition.x += totalwidth;//将地图向右平移一个完整的地图宽度transform.position = tempPosition;//更新位置}else if (mainCamera.transform.position.x < transform.position.x - totalwidth / 2){tempPosition.x -= totalwidth;//将地图向左平移一个完整的地图宽度transform.position = tempPosition;//更新位置}}
}

配置


效果

奔跑动画切换

动画配置

修改PlayerController

private void FixedUpdate()
{ApplyMovement(); // 应用移动UpdateStatus();
}//判断状态 
private void UpdateStatus(){if(rb.velocity.x != 0){isRunning = true;}else{isRunning = false;}
}//播放动画
private void UpdateAnimations(){animator.SetBool("isRunning", isRunning);
}

效果

跳跃动画，跳跃次数限制

配置跳跃动画

修改PlayerController

[Header("跳跃 地面检测")]
private float amountOfJumpsLeft;//当前可跳跃次数
private bool isGround;//是否是地面
private bool canJump;//能否跳跃
public int amountOfJumps = 1;//跳跃次数
public float groundCheckRadius;//地面检测距离
public Transform groundCheck;//地面检测点
public LayerMask whatIsGround;//地面检测图层void Start()
{rb = GetComponent<Rigidbody2D>();animator = GetComponent<Animator>();amountOfJumpsLeft = amountOfJumps;
}// 检查输入
private void CheckInput()
{movementInputDirection = Input.GetAxisRaw("Horizontal"); // 获取水平输入if (Input.GetButtonDown("Jump")){Jump(); // 如果按下跳跃键，则执行跳跃}
}// 跳跃
private void Jump()
{if (canJump){rb.velocity = new Vector2(rb.velocity.x, jumpForce); // 设置 y 方向的速度为跳跃力度amountOfJumpsLeft--;}
}//判断能否跳跃
private void CheckIfCanJump()
{if (isGround && rb.velocity.y < 0){amountOfJumpsLeft = amountOfJumps;}if (amountOfJumpsLeft <= 0){canJump = false;}else{canJump = true;}
}//播放动画
private void UpdateAnimations()
{animator.SetBool("isRunning", isRunning);animator.SetBool("isGround", isGround);animator.SetFloat("yVelocity", rb.velocity.y);
}//检测
private void CheckSurroundings()
{//地面检测isGround = Physics2D.OverlapCircle(groundCheck.position, groundCheckRadius, whatIsGround);
}//视图显示检测范围
private void OnDrawGizmos()
{Gizmos.DrawWireSphere(groundCheck.position, groundCheckRadius);
}

配置，这里配置了2段跳

记得配置地面图层为Ground

效果

角色添加2d物理材质，防止角色粘在墙上

修改摩檫力为0

配置

效果

如果角色移动时背景出现黑线条

方法一

添加材质

配置

方法二

我们创建了一个Sprite Atlas来将Spritesheet拖入其中

把你的瓦片素材拖入

墙壁滑行

配置滑墙动画

修改PlayerController

[Header("墙壁滑行")]
public float wallCheckDistance;//墙壁检测距离
public Transform wallCheck;//墙壁检测点
public float wallSlideSpeed;//墙壁滑行速度
private bool isTouchingWall;//是否接触墙壁
private bool isWallSliding;//是否正在墙壁滑行// 移动
private void ApplyMovement()
{rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y); // 设置 x 方向的速度//应用滑墙速度    if (isWallSliding){if (rb.velocity.y < -wallSlideSpeed){rb.velocity = new Vector2(rb.velocity.x, -wallSlideSpeed);// 限制垂直速度以应用墙壁滑行速度}}
}//是否正在墙壁滑行
private void CheckIfWallSliding()
{if (isTouchingWall && !isGround && rb.velocity.y < 0){isWallSliding = true;}else{isWallSliding = false;}
}//播放动画
private void UpdateAnimations()
{animator.SetBool("isRunning", isRunning);animator.SetBool("isGround", isGround);animator.SetFloat("yVelocity", rb.velocity.y);animator.SetBool("isWallSliding", isWallSliding);
}//检测
private void CheckSurroundings()
{//地面检测isGround = Physics2D.OverlapCircle(groundCheck.position, groundCheckRadius, whatIsGround);//墙面检测isTouchingWall = Physics2D.Raycast(wallCheck.position, transform.right, wallCheckDistance, whatIsGround);
}//视图显示检测范围
private void OnDrawGizmos()
{Gizmos.DrawWireSphere(groundCheck.position, groundCheckRadius);Gizmos.DrawLine(wallCheck.position, wallCheck.position + wallCheckDistance * Vector3.right);
}

配置

效果

实现角色滑墙不可以通过移动离开且不可翻转角色

// 移动
private void ApplyMovement()
{// 如果在地面上if (isGround){rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y); // 设置 x 方向的速度}//应用滑墙速度    if (isWallSliding){if (rb.velocity.y < -wallSlideSpeed){rb.velocity = new Vector2(rb.velocity.x, -wallSlideSpeed);// 限制垂直速度以应用墙壁滑行速度}}
}// 翻转角色
private void Flip()
{if (!isWallSliding){isFacingRight = !isFacingRight; // 改变面向方向的标志transform.Rotate(0.0f, 180.0f, 0.0f); // 旋转角色}
}

效果

空中运动控制

空气阻力和移动速度控制

public float movementForceInAir;//空气中的运动力
public float airDragMultiplier = 0.95f;//空气阻力// 移动
private void ApplyMovement()
{// 如果在地面上if (isGround){rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y); // 设置 x 方向的速度}// 如果不在地面上且不是在墙壁滑行且有水平输入else if (!isGround && !isWallSliding && movementInputDirection != 0){Vector2 forceToAdd = new Vector2(movementForceInAir * movementInputDirection, 0);// 在空中施加的力rb.AddForce(forceToAdd);// 添加力到刚体if (Mathf.Abs(rb.velocity.x) > movementSpeed){rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y);// 限制水平速度}}// 如果不在地面上且不是在墙壁滑行且没有水平输入else if (!isGround && !isWallSliding && movementInputDirection == 0){rb.velocity = new Vector2(rb.velocity.x * airDragMultiplier, rb.velocity.y);// 应用空气阻力}//应用滑墙速度    if (isWallSliding){if (rb.velocity.y < -wallSlideSpeed){rb.velocity = new Vector2(rb.velocity.x, -wallSlideSpeed);// 限制垂直速度以应用墙壁滑行速度}}
}

配置

效果

可变跳跃高度

长跳跃和短跳，长按和之前跳的和之前一样高

public float variableJumpHeightMultiplier = 0.5f;// 检查输入
private void CheckInput()
{movementInputDirection = Input.GetAxisRaw("Horizontal"); // 获取水平输入if (Input.GetButtonDown("Jump")){Jump(); // 如果按下跳跃键，则执行跳跃}// 检测是否松开Jumpif (Input.GetButtonUp("Jump")){rb.velocity = new Vector2(rb.velocity.x, rb.velocity.y * variableJumpHeightMultiplier);}
}

效果

蹬墙跳

实现不输入，点击跳跃就从墙上跳下来，方向按键+跳跃控制左右蹬墙跳

[Header("蹬墙跳")]
public float wallHopForce; // 离开墙时的力
public float wallJumpForce; // 蹬墙跳时施加的力
public Vector2 wallHopDirection; // 离开墙时的方向向量
public Vector2 wallJumpDirection; // 蹬墙跳时的方向向量
private int facingDirection = 1; // 角色面向的方向，1右 -1左void Start()
{rb = GetComponent<Rigidbody2D>();animator = GetComponent<Animator>();amountOfJumpsLeft = amountOfJumps;//归一化向量，因为我们只要向量的方向，而不考虑长度wallHopDirection = wallHopDirection.normalized;wallJumpDirection = wallJumpDirection.normalized;
}// 跳跃
private void Jump()
{// 如果可以跳跃并且不是在墙壁滑行状态下if (canJump && !isWallSliding){rb.velocity = new Vector2(rb.velocity.x, jumpForce); // 设置 y 方向的速度为跳跃力度amountOfJumpsLeft--;}// 如果正在墙壁滑行且没有输入水平移动方向，并且可以跳跃else if(isWallSliding && movementInputDirection == 0 && canJump){isWallSliding = false;amountOfJumpsLeft--;// 计算添加的力量，使角色从墙壁上弹开Vector2 forceToAdd = new Vector2(wallHopForce * wallHopDirection.x * -facingDirection, wallHopForce * wallHopDirection.y);rb.AddForce(forceToAdd, ForceMode2D.Impulse);}// 如果正在墙壁滑行或者正在接触墙壁，并且有水平移动输入，并且可以跳跃else if((isWallSliding || isTouchingWall) && movementInputDirection != 0 && canJump){isWallSliding = false;amountOfJumpsLeft --;// 计算添加的力量，使角色从墙壁上跳跃Vector2 forceToAdd = new Vector2(wallHopForce * wallHopDirection.x * movementInputDirection, wallJumpForce * wallJumpDirection.y);rb.AddForce(forceToAdd, ForceMode2D.Impulse);}
}//判断能否跳跃
private void CheckIfCanJump()
{if ((isGround && rb.velocity.y < 0) || isWallSliding){amountOfJumpsLeft = amountOfJumps;}if (amountOfJumpsLeft <= 0){canJump = false;}else{canJump = true;}
}// 翻转角色
private void Flip()
{if (!isWallSliding){facingDirection *= -1;isFacingRight = !isFacingRight; // 改变面向方向的标志transform.Rotate(0.0f, 180.0f, 0.0f); // 旋转角色}
}

配置

运行效果

完整代码

using Unity.VisualScripting;
using UnityEngine;public class PlayerController : MonoBehaviour
{private float movementInputDirection; // 水平输入方向private bool isFacingRight = true; // 玩家是否面向右侧private Rigidbody2D rb;public float movementSpeed = 10.0f; // 移动速度public float jumpForce = 16.0f; // 跳跃力度private Animator animator;[Header("状态")]public bool isRunning;[Header("跳跃 地面检测")]public int amountOfJumps = 1;//跳跃次数public float groundCheckRadius;//地面检测距离public Transform groundCheck;//地面检测点public LayerMask whatIsGround;//地面检测图层private float amountOfJumpsLeft;//当前可跳跃次数private bool isGround;//是否是地面private bool canJump;//能否跳跃[Header("墙壁滑行")]public float wallCheckDistance;//墙壁检测距离public Transform wallCheck;//墙壁检测点public float wallSlideSpeed;//墙壁滑行速度public float movementForceInAir;//空气中的运动力public float airDragMultiplier = 0.95f;//空气阻力private bool isTouchingWall;//是否接触墙壁private bool isWallSliding;//是否正在墙壁滑行[Header("可变高度")]public float variableJumpHeightMultiplier = 0.5f;[Header("蹬墙跳")]public float wallHopForce; // 离开墙时的力public float wallJumpForce; // 蹬墙跳时施加的力public Vector2 wallHopDirection; // 离开墙时的方向向量public Vector2 wallJumpDirection; // 蹬墙跳时的方向向量private int facingDirection = 1; // 角色面向的方向，1右 -1左void Start(){rb = GetComponent<Rigidbody2D>();animator = GetComponent<Animator>();amountOfJumpsLeft = amountOfJumps;//归一化向量，因为我们只要向量的方向，而不考虑长度wallHopDirection = wallHopDirection.normalized;wallJumpDirection = wallJumpDirection.normalized;}void Update(){CheckInput(); // 检查输入CheckMovementDirection();UpdateAnimations();CheckIfCanJump();CheckIfWallSliding();CheckSurroundings();}private void FixedUpdate(){ApplyMovement(); // 应用移动UpdateStatus();}// 检查玩家面朝的方向private void CheckMovementDirection(){if (isFacingRight && movementInputDirection < 0){Flip(); // 翻转角色}else if (!isFacingRight && movementInputDirection > 0){Flip(); // 翻转角色}}// 检查输入private void CheckInput(){movementInputDirection = Input.GetAxisRaw("Horizontal"); // 获取水平输入if (Input.GetButtonDown("Jump")){Jump(); // 如果按下跳跃键，则执行跳跃}if (Input.GetButtonUp("Jump")){rb.velocity = new Vector2(rb.velocity.x, rb.velocity.y * variableJumpHeightMultiplier);}}// 移动private void ApplyMovement(){// 如果在地面上if (isGround){rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y); // 设置 x 方向的速度}// 如果不在地面上且不是在墙壁滑行且有水平输入else if (!isGround && !isWallSliding && movementInputDirection != 0){Vector2 forceToAdd = new Vector2(movementForceInAir * movementInputDirection, 0);// 在空中施加的力rb.AddForce(forceToAdd);// 添加力到刚体if (Mathf.Abs(rb.velocity.x) > movementSpeed){rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y);// 限制水平速度}}// 如果不在地面上且不是在墙壁滑行且没有水平输入else if (!isGround && !isWallSliding && movementInputDirection == 0){rb.velocity = new Vector2(rb.velocity.x * airDragMultiplier, rb.velocity.y);// 应用空气阻力}// //应用滑墙速度    if (isWallSliding){if (rb.velocity.y < -wallSlideSpeed){rb.velocity = new Vector2(rb.velocity.x, -wallSlideSpeed);// 限制垂直速度以应用墙壁滑行速度}}}// 移动private void ApplyMovement(){if(!isGround && !isWallSliding && movementInputDirection == 0){rb.velocity = new Vector2(rb.velocity.x * airDragMultiplier, rb.velocity.y);// 应用空气阻力}else{rb.velocity = new Vector2(movementSpeed * movementInputDirection, rb.velocity.y); // 设置 x 方向的速度}//应用滑墙速度    if (isWallSliding){if (rb.velocity.y < -wallSlideSpeed){rb.velocity = new Vector2(rb.velocity.x, -wallSlideSpeed);// 限制垂直速度以应用墙壁滑行速度}}}//判断跑步状态 private void UpdateStatus(){if(rb.velocity.x != 0){isRunning = true;}else{isRunning = false;}}// 翻转角色private void Flip(){if (!isWallSliding){facingDirection *= -1;isFacingRight = !isFacingRight; // 改变面向方向的标志transform.Rotate(0.0f, 180.0f, 0.0f); // 旋转角色}}//播放动画private void UpdateAnimations(){animator.SetBool("isRunning", isRunning);animator.SetBool("isGround", isGround);animator.SetFloat("yVelocity", rb.velocity.y);animator.SetBool("isWallSliding", isWallSliding);}//判断能否跳跃private void CheckIfCanJump(){if ((isGround && rb.velocity.y < 0) || isWallSliding){amountOfJumpsLeft = amountOfJumps;}if (amountOfJumpsLeft <= 0){canJump = false;}else{canJump = true;}}//检测private void CheckSurroundings(){//地面检测isGround = Physics2D.OverlapCircle(groundCheck.position, groundCheckRadius, whatIsGround);//墙面检测isTouchingWall = Physics2D.Raycast(wallCheck.position, transform.right, wallCheckDistance, whatIsGround);}//是否墙壁滑行private void CheckIfWallSliding(){if (isTouchingWall && !isGround && rb.velocity.y < 0){isWallSliding = true;}else{isWallSliding = false;}}//视图显示检测范围private void OnDrawGizmos(){Gizmos.DrawWireSphere(groundCheck.position, groundCheckRadius);Gizmos.DrawLine(wallCheck.position, wallCheck.position + wallCheckDistance * Vector3.right);}
}

源码

整理好了我会放上来

完结

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一位在小公司默默奋斗的开发者，出于兴趣爱好，最近开始自学unity，闲暇之余，边学习边记录分享，站在巨人的肩膀上，通过学习前辈们的经验总是会给我很多帮助和启发！php是工作，unity是生活！如果你遇到任何问题，也欢迎你评论私信找我， 虽然有些问题我也不一定会，但是我会查阅各方资料，争取给出最好的建议，希望可以帮助更多想学编程的人，共勉~