本文主要是介绍Unity类银河恶魔城学习记录1-10 PlayerWallJump源代码 P37，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
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Player.cs
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;public class Player : MonoBehaviour
{[Header("Move Info")]public float moveSpeed;//定义速度，与xInput相乘控制速度的大小public float jumpForce;[Header("Dash Info")][SerializeField] private float dashCooldown;private float dashUsageTimer;//为dash设置冷却时间，在一定时间内不能连续使用public float dashSpeed;//冲刺速度public float dashDuration;//持续时间public float dashDir { get; private set; }[Header("Collision Info")][SerializeField] private Transform groundCheck;//transform类，代表的时物体的位置,后面会来定位子组件的位置 [SerializeField] private float groundCheckDistance;[SerializeField] private Transform wallCheck;//transform类，代表的时物体的位置,后面会来定位子组件的位置 [SerializeField] private float wallCheckDistance;[SerializeField] private LayerMask whatIsGround;//LayerMask类，与Raycast配合，https://docs.unity3d.com/cn/current/ScriptReference/Physics.Raycast.htmlpublic int facingDir { get; private set; } = 1;private bool facingRight = true;//判断是否朝右#region 定义Unity组件public Animator anim { get; private set; }//这样才能配合着拿到自己身上的animator的控制权public Rigidbody2D rb { get; private set; }//配合拿到身上的Rigidbody2D组件控制权#endregion#region 定义Statespublic PlayerStateMachine stateMachine { get; private set; }public PlayerIdleState idleState { get; private set; }public PlayerMoveState moveState { get; private set; }public PlayerJumpState jumpState { get; private set; }public PlayerAirState airState { get; private set; }public PlayerDashState dashState { get; private set; }public PlayerWallSlideState wallSlide { get; private set; }public PlayerWallJumpState wallJump { get; private set; }#endregionprivate void Awake(){stateMachine = new PlayerStateMachine();//通过构造函数，在构造时传递信息idleState = new PlayerIdleState(this, stateMachine, "Idle");moveState = new PlayerMoveState(this, stateMachine, "Move");jumpState = new PlayerJumpState(this, stateMachine, "Jump");airState = new PlayerAirState(this, stateMachine, "Jump");dashState = new PlayerDashState(this, stateMachine, "Dash");wallSlide = new PlayerWallSlideState(this, stateMachine, "WallSlide");wallJump = new PlayerWallJumpState(this, stateMachine, "Jump");//wallJump也是Jump动画//this 就是 Player这个类本身}//Awake初始化所以State，为所有State传入各自独有的参数，及animBool，以判断是否调用此动画（与animatoin配合完成）private void Start(){anim = GetComponentInChildren<Animator>();//拿到自己身上的animator的控制权rb = GetComponent<Rigidbody2D>();stateMachine.Initialize(idleState);}private void Update()//在mano中update会自动刷新但其他没有mano的不会故，需要在这个updata中调用其他脚本中的函数stateMachine.currentState.update以实现 //stateMachine中的update{stateMachine.currentState.Update();//反复调用CurrentState的Update函数CheckForDashInput();}public void CheckForDashInput(){dashUsageTimer -= Time.deltaTime;//给dash上冷却时间if(IsWallDetected()){return;}//修复在wallslide可以dash的BUGif (Input.GetKeyDown(KeyCode.LeftShift) && dashUsageTimer < 0){dashUsageTimer = dashCooldown;dashDir = Input.GetAxisRaw("Horizontal");//设置一个值，可以将dash的方向改为你想要的方向而不是你的朝向if (dashDir == 0){dashDir = facingDir;//只有当玩家没有控制方向时才使用默认朝向}stateMachine.ChangeState(dashState);}}//将Dash切换设置成一个函数，使其在所以情况下都能使用public void SetVelocity(float _xVelocity, float _yVelocity){rb.velocity = new Vector2(_xVelocity, _yVelocity);//将rb的velocity属性设置为对应的想要的二维向量。因为2D游戏的速度就是二维向量FlipController(_xVelocity);//在其他设置速度的时候调用翻转控制器}//控制速度的函数，此函数在其他State中可能会使用，但仅能通过player.SeVelocity调用public bool IsGroundDetected(){return Physics2D.Raycast(groundCheck.position, Vector2.down, groundCheckDistance, whatIsGround);}//通过RayCast检测是否挨着地面,https://docs.unity3d.com/cn/current/ScriptReference/Physics.Raycast.html//xxxxxxxx() => xxxxxxxx == xxxxxxxxxx() return xxxxxxxxx;public bool IsWallDetected(){return Physics2D.Raycast(wallCheck.position, Vector2.right*facingDir, wallCheckDistance, whatIsGround);}//通过RayCast检测是否挨着地面,https://docs.unity3d.com/cn/current/ScriptReference/Physics.Raycast.html//xxxxxxxx() => xxxxxxxx == xxxxxxxxxx() return xxxxxxxxx;private void OnDrawGizmos(){Gizmos.DrawLine(groundCheck.position, new Vector3(groundCheck.position.x, groundCheck.position.y - groundCheckDistance));//绘制一条从 from(前面的) 开始到 to（后面的） 的线。Gizmos.DrawLine(wallCheck.position, new Vector3(wallCheck.position.x + wallCheckDistance, wallCheck.position.y));//绘制一条从 from(前面的) 开始到 to（后面的） 的线。}//画线函数public void Flip(){facingDir = facingDir * -1;facingRight = !facingRight;transform.Rotate(0, 180, 0);//旋转函数,transform不需要额外定义，因为他是自带的}//翻转函数public void FlipController(float _x)//目前设置x，目的时能在空中时也能转身{if (_x > 0 && !facingRight)//当速度大于0且没有朝右时，翻转{Flip();}else if (_x < 0 && facingRight){Flip();}}
}
PlayerState.cs
using System.Collections;
using System.Collections.Generic;
using System.Security.Authentication.ExtendedProtection;
using UnityEngine;
//被继承的总类，后面的所以state都需要继承它
//实际上Player并没有进入过这个状态，没有调用此脚本，所有的调用均属于此脚本的子脚本
public class PlayerState
{protected PlayerStateMachine stateMachine;//创建PlayerStateMachine类，以承接来自Player.cs传过来的东西protected Player player;//创建Player类，以承接来自Player.cs传过来的东西protected float stateTimer;#region Unity组件protected Rigidbody2D rb;//纯简化，将player.rb --> rb#endregionprivate string animBoolName;//控制此时的anim的BOOL值protected float xInput;//设置一个可以保存当前是否在按移动键的变量protected float yInput;public PlayerState(Player _player,PlayerStateMachine _stateMachine,string _animBoolName){this.player = _player;this.stateMachine = _stateMachine; this.animBoolName = _animBoolName;}//构造函数，用于传递信息public virtual void Enter(){player.anim.SetBool(animBoolName, true);//通过animator自带的函数，将animator里的Bool值改变为想要的值rb = player.rb;//纯简化，将player.rb --> rb}public virtual void Update(){stateTimer -= Time.deltaTime;//https://docs.unity3d.com/cn/current/ScriptReference/Time-deltaTime.html//从上一帧到当前帧的间隔（以秒为单位）（只读）。这个表达式就是表示每一帧都不断的减少时间player.anim.SetFloat("yVelocity", rb.velocity.y);//通过animator自带的函数，将animator里的Float值改变为想要的值,改变yVelocity以控制Jump与Fall动画的切换xInput = Input.GetAxisRaw("Horizontal");//对于键盘和游戏杆输入，该值将处于 -1...1 的范围内。 由于未对输入进行平滑处理，键盘输入将始终为 -1、0 或 1。 如果您想自己完成键盘输入的所有平滑处理，这非常有用。yInput = Input.GetAxisRaw("Vertical");}public virtual void Exit(){player.anim.SetBool(animBoolName, false);//通过animator自带的函数，将animator里的Bool值改变为想要的值}}
PlayerStateMachine.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerStateMachine
{public PlayerState currentState { get; private set; }public void Initialize(PlayerState _startState){currentState = _startState;currentState.Enter();}//初始化状态函数，及通过将idleState传送进来，以便于调用idleState中的Enter函数public void ChangeState(PlayerState _newState){currentState.Exit();currentState = _newState;currentState.Enter();}//更改状态函数//1.调用当前状态的Exit函数，使动画为false//2.传入新的状态，替换原来的状态//3.调用新的状态的Enter函数
}
PlayerGroundState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
//GroundState用于保证只有在Idle和Move这两个地面状态下才能调用某些函数，并且稍微减少一点代码量
public class PlayerGroundState : PlayerState
{public PlayerGroundState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}public override void Enter(){base.Enter();}public override void Exit(){base.Exit();}public override void Update(){base.Update();if(player.IsGroundDetected()==false){stateMachine.ChangeState(player.airState);}// 写这个是为了防止在空中直接切换为moveState了。if (Input.GetKeyDown(KeyCode.Space) && player.IsGroundDetected()){stateMachine.ChangeState(player.jumpState);}//空格切换为跳跃状态}}
PlayerIdleState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerIdleState : PlayerGroundState//继承函数，获得PlayerState里的所有函数和参数
{public PlayerIdleState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}//构造函数，用于传递信息。//当外补New出对象时，New出的对象里传入参数public override void Enter(){base.Enter();rb.velocity = new Vector2(0, 0);//因为速度是没在wallJump里改，所以进入idle写死速度为0}public override void Exit(){base.Exit();}public override void Update(){base.Update();//-------------------------------if (player.IsWallDetected()){if (xInput != 0 && xInput != player.facingDir){stateMachine.ChangeState(player.moveState);//在这里我们能使用Player里的东西，主要是因为我们通过构造函数传过来Player实体，如果不传，则无法使用已经存在了的Player实体。}}else{if (xInput != 0){stateMachine.ChangeState(player.moveState);}}//--------------------------------//以上代码为自我改良版，改良了在碰墙时，idle和move会交替卡住的状况}
}
PlayerMoveState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerMoveState : PlayerGroundState
{public PlayerMoveState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}//构造函数，用于传递信息。//当外补New出对象时，New出的对象里传入参数public override void Enter(){base.Enter();}public override void Exit(){base.Exit();}public override void Update(){base.Update();player.SetVelocity(xInput*player.moveSpeed, rb.velocity.y);//player.rb.velocity.y默认的为0,player.moveSpeed在player中定义，但可以在Unity引擎中更改if (xInput==0|| player.IsWallDetected()){stateMachine.ChangeState(player.idleState);//在这里我们能使用Player里的东西，主要是因为我们通过构造函数传过来Player实体，如果不传，则无法使用已经存在了的Player实体。}}
}
PlayerJumpState.cs
sing System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerJumpState : PlayerState
{public PlayerJumpState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}public override void Enter(){base.Enter();rb.velocity = new Vector2(rb.velocity.x, player.jumpForce);//将y轴速度改变}public override void Update(){base.Update();if (rb.velocity.y < 0)//当速度小于0时切换为airState{stateMachine.ChangeState(player.airState);//与其说是airState，不如说是FallState}}public override void Exit(){base.Exit();}}
PlayerAirState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerAirState : PlayerState
{public PlayerAirState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}public override void Enter(){base.Enter();}public override void Exit(){base.Exit();}public override void Update(){base.Update();if (player.IsGroundDetected())//触地时切换为默认状态{stateMachine.ChangeState(player.idleState);}if(xInput != 0)//使角色能在空中时改变速度{player.SetVelocity(player.moveSpeed* 0.8f * xInput, rb.velocity.y);}if(player.IsWallDetected())//在空中碰墙时切换为滑墙状态{stateMachine.ChangeState(player.wallSlide);}}}
PlayerDashState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerDashState : PlayerState
{ //由Ground进入public PlayerDashState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}public override void Enter(){base.Enter();stateTimer = player.dashDuration;设置Dash可以保持的值}public override void Exit(){base.Exit();player.SetVelocity(0, rb.velocity.y);//当退出时使速度为0防止动作结束后速度不变导致的持续移动}public override void Update(){base.Update();if(!player.IsGroundDetected()&&player.IsWallDetected())//修复无法在空中dash直接进入wallSlide,修复在wallslide可以dash//因为一旦在wallSlide里dash，就会直接进wallSlide，当然还有更简单的方法{stateMachine.ChangeState(player.wallSlide);}player.SetVelocity(player.dashSpeed * player.dashDir, 0);//这个写在Update里，防止在x轴方向减速了，同时Y轴写成0，以防止dash还没有完成就从空中掉下去了if (stateTimer < 0)当timer小于0，切换{stateMachine.ChangeState(player.idleState);}}
}
PlayerWallSlideState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerWallSlideState : PlayerState
{//在空中碰墙时切换为滑墙状态public PlayerWallSlideState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}public override void Enter(){base.Enter();}public override void Exit(){base.Exit();}public override void Update(){base.Update();if(Input.GetKeyDown(KeyCode.Space)){stateMachine.ChangeState(player.wallJump);return; //由于都是从wallSlide进入，光摁Space会进入其他State，故由return控制}if(xInput!= 0&&player.facingDir!=xInput)//这样做是为了保证在没有接触地面的时候也可以切换回idleState，使控制更加灵活{stateMachine.ChangeState(player.idleState);}if(player.IsGroundDetected())//接触地面切回idleState{stateMachine.ChangeState(player.idleState);}if (yInput < 0)rb.velocity = new Vector2(0,rb.velocity.y);//玩家可以控制是否加速滑墙elserb.velocity = new Vector2(0, rb.velocity.y * .7f);//玩家没控制时在墙上滑行时速度减慢一点}
}
PlayerWallJumpState.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerWallJumpState : PlayerState
{//wallJUmp自然从wallSlide进入public PlayerWallJumpState(Player _player, PlayerStateMachine _stateMachine, string _animBoolName) : base(_player, _stateMachine, _animBoolName){}public override void Enter(){base.Enter();stateTimer = 1f;//定时器，在一定时间后进入idleplayer.SetVelocity(5 * -player.facingDir, player.jumpForce);//跳是向反方向跳}public override void Exit(){base.Exit();}public override void Update(){base.Update();if(stateTimer<0){stateMachine.ChangeState(player.idleState);}if (player.IsGroundDetected()){stateMachine.ChangeState(player.idleState);//但是wallslide时间有时候比触底时间长，导致有延迟}}
}
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