Godot.NET C#IOC重构(9-10):三连击，攻击框

目录

• 前言
• AnimationPlayer和AnimatedSprite2D
  • 将导出属性添加到关键帧里面。
  • 状态机构建
    • 核心代码
    • 完整代码
    • 实现效果
• 碰撞框和受攻击框
  • 全局类
    • HitBox:攻击框
    • HurtBox:受击框
    • 实现效果
  • 添加Player攻击
• 总结

前言

这篇博客来深入讲解一下Godot中的AnimationPlayer

AnimationPlayer和AnimatedSprite2D

AnimatedSprite2D就是一个简单的帧动画组件，只能用于播放简单的帧动画。
AnimationPlayer是一个可以实现复杂的帧动画的组件，可以添加各种关键帧。

将导出属性添加到关键帧里面。

我们在C# 中添加导出属性

[Export]
public bool CanCombo
{get => Model.CanCombo;set { Model.CanCombo = value; }
}

我们添加这个CanCombo的用意是用来检测动画是否播放到位，有点类似于LOL里面的攻击前摇和攻击后摇的感觉。

状态机构建

核心代码

using Godot;
using GodotNet_LegendOfPaladin2.Utils;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static Godot.TextServer;namespace GodotNet_LegendOfPaladin2.SceneModels
{public class PlayerSceneModel : ISceneModel{public enum AnimationEnum { REST, Idel, Running, Jump, Fall, Land, WallSliding, Attack_1, Attack_2, Attack_3 }/// <summary>/// 可以移动的状态/// </summary>public AnimationEnum[] CanMoveAnimation = [AnimationEnum.Idel, AnimationEnum.Running ,AnimationEnum.Fall,AnimationEnum.WallSliding];private AnimationEnum animationEnum = AnimationEnum.Idel;public AnimationEnum AnimationState{get => animationEnum;private set{if (value != animationEnum){printHelper.Debug($"{value}");}animationEnum = value;}}public bool IsLand { get; private set; } = true;public float Direction { get; private set; } = 0;private void SetAnimation(){isComboRequest = Input.IsActionPressed($"{ProjectSettingHelper.InputMapEnum.attack}") && canCombo;//isComboRequest = !Input.IsActionJustReleased(ProjectSettingHelper.InputMapEnum.attack.ToString());var isPlaying = animationPlayer.IsPlaying();switch (AnimationState){case AnimationEnum.Idel:if (Input.IsActionJustPressed($"{ProjectSettingHelper.InputMapEnum.attack}")){AnimationState = AnimationEnum.Attack_1;}else if (!Mathf.IsZeroApprox(Direction)){AnimationState = AnimationEnum.Running;}break;case AnimationEnum.Jump:if (characterBody2D.Velocity.Y < 0){AnimationState = AnimationEnum.Fall;}else if (characterBody2D.IsOnWall()){AnimationState = AnimationEnum.WallSliding;}break;case AnimationEnum.Running:if (Input.IsActionJustPressed($"{ProjectSettingHelper.InputMapEnum.attack}")){AnimationState = AnimationEnum.Attack_1;}else if (Mathf.IsZeroApprox(Direction)){AnimationState = AnimationEnum.Idel;}break;case AnimationEnum.Fall:if (Mathf.IsZeroApprox(characterBody2D.Velocity.Y)){AnimationState = AnimationEnum.Land;//开启异步任务，如果过了400毫秒，仍然是Land，则转为IdelTask.Run(async () =>{await Task.Delay(400);if (AnimationState == AnimationEnum.Land){AnimationState = AnimationEnum.Idel;}});}else if (characterBody2D.IsOnWall()){AnimationState = AnimationEnum.WallSliding;}break;case AnimationEnum.Land:break;case AnimationEnum.WallSliding:if (!characterBody2D.IsOnWall()){AnimationState = AnimationEnum.Fall;}break;case AnimationEnum.Attack_1:if (isComboRequest && !isPlaying){AnimationState = AnimationEnum.Attack_2;isComboRequest = false;}else if (!isPlaying){AnimationState = AnimationEnum.Idel;}break;case AnimationEnum.Attack_2:if (isComboRequest && !isPlaying){AnimationState = AnimationEnum.Attack_3;isComboRequest = false;}else if (!isPlaying){AnimationState = AnimationEnum.Idel;}break;case AnimationEnum.Attack_3:if (!isPlaying){AnimationState = AnimationEnum.Idel;}break;}if (!Mathf.IsZeroApprox(Direction)){sprite2D.FlipH = Direction < 0;}PlayAnimation();}/// <summary>/// 播放动画/// </summary>private void PlayAnimation(){//printHelper.Debug(AnimationState.ToString());animationPlayer.Play(AnimationState.ToString());}}
}

完整代码

using Godot;
using GodotNet_LegendOfPaladin2.Utils;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static Godot.TextServer;namespace GodotNet_LegendOfPaladin2.SceneModels
{public class PlayerSceneModel : ISceneModel{private PrintHelper printHelper;#region 常量/// <summary>/// 速度/// </summary>public const float RUN_SPEED = 200;/// <summary>/// 加速度，为了显示明显，20秒内到达RUN_SPEED的速度/// </summary>public const float ACCELERATION = (float)(RUN_SPEED / 20);/// <summary>/// 跳跃速度/// </summary>public const float JUMP_SPEED = -350;/// <summary>/// 蹬墙跳的速度/// </summary>public readonly Vector2 WALL_JUMP_VELOCITY = new Vector2(400, -320);private bool canCombo = false;/// <summary>/// 是否能够连击/// </summary>public bool CanCombo{get => canCombo; set{printHelper.Debug($"设置canComBo:{value}");canCombo = value;}}#endregionprivate Sprite2D sprite2D;private CharacterBody2D characterBody2D;private AnimationPlayer animationPlayer;private Camera2D camera2D;private bool isComboRequest = false;public enum AnimationEnum { REST, Idel, Running, Jump, Fall, Land, WallSliding, Attack_1, Attack_2, Attack_3 }/// <summary>/// 可以移动的状态/// </summary>public AnimationEnum[] CanMoveAnimation = [AnimationEnum.Idel, AnimationEnum.Running ,AnimationEnum.Fall,AnimationEnum.WallSliding];private AnimationEnum animationEnum = AnimationEnum.Idel;public AnimationEnum AnimationState{get => animationEnum;private set{if (value != animationEnum){printHelper.Debug($"{value}");}animationEnum = value;}}public bool IsLand { get; private set; } = true;public float Direction { get; private set; } = 0;/// <summary>/// 跳跃重置时间/// </summary>public const float JudgeIsJumpTime = 0.5f;private float isJumpTime = 0;public PlayerSceneModel(PrintHelper printHelper){this.printHelper = printHelper;this.printHelper.SetTitle(nameof(PlayerSceneModel));}public override void Process(double delta){PlayerMove(delta);SetAnimation();}/// <summary>/// 角色移动/// </summary>/// <param name="delta"></param>private void PlayerMove(double delta){var velocity = characterBody2D.Velocity;velocity.Y += ProjectSettingHelper.Gravity * (float)delta;Direction = Input.GetAxis(ProjectSettingHelper.InputMapEnum.move_left.ToString(),ProjectSettingHelper.InputMapEnum.move_right.ToString());//原本直接赋值//velocity.X = direction*RUN_SPEED;//现在使用加速度velocity.X = Mathf.MoveToward(velocity.X, Direction * RUN_SPEED, ACCELERATION);//按下跳跃键，就将跳跃时间设置为判断区间if (Input.IsActionJustPressed(ProjectSettingHelper.InputMapEnum.jump.ToString())){isJumpTime = JudgeIsJumpTime;}//慢慢变成0isJumpTime = (float)Mathf.MoveToward(isJumpTime, 0, delta);//如果在跳跃时间的判断内if (isJumpTime != 0){if (characterBody2D.IsOnFloor()){//进行跳跃之后，跳跃时间结束isJumpTime = 0;velocity.Y = JUMP_SPEED;AnimationState = AnimationEnum.Jump;}else if (AnimationState == AnimationEnum.WallSliding){//进行跳跃之后，跳跃时间结束isJumpTime = 0;velocity = WALL_JUMP_VELOCITY;//获取墙面的法线的方向velocity.X *= characterBody2D.GetWallNormal().X;AnimationState = AnimationEnum.Jump;}}characterBody2D.Velocity = velocity;if (CanMoveAnimation.Contains(AnimationState)){characterBody2D.MoveAndSlide();}}private void SetAnimation(){isComboRequest = Input.IsActionPressed($"{ProjectSettingHelper.InputMapEnum.attack}") && canCombo;//isComboRequest = !Input.IsActionJustReleased(ProjectSettingHelper.InputMapEnum.attack.ToString());var isPlaying = animationPlayer.IsPlaying();switch (AnimationState){case AnimationEnum.Idel:if (Input.IsActionJustPressed($"{ProjectSettingHelper.InputMapEnum.attack}")){AnimationState = AnimationEnum.Attack_1;}else if (!Mathf.IsZeroApprox(Direction)){AnimationState = AnimationEnum.Running;}break;case AnimationEnum.Jump:if (characterBody2D.Velocity.Y < 0){AnimationState = AnimationEnum.Fall;}else if (characterBody2D.IsOnWall()){AnimationState = AnimationEnum.WallSliding;}break;case AnimationEnum.Running:if (Input.IsActionJustPressed($"{ProjectSettingHelper.InputMapEnum.attack}")){AnimationState = AnimationEnum.Attack_1;}else if (Mathf.IsZeroApprox(Direction)){AnimationState = AnimationEnum.Idel;}break;case AnimationEnum.Fall:if (Mathf.IsZeroApprox(characterBody2D.Velocity.Y)){AnimationState = AnimationEnum.Land;//开启异步任务，如果过了400毫秒，仍然是Land，则转为IdelTask.Run(async () =>{await Task.Delay(400);if (AnimationState == AnimationEnum.Land){AnimationState = AnimationEnum.Idel;}});}else if (characterBody2D.IsOnWall()){AnimationState = AnimationEnum.WallSliding;}break;case AnimationEnum.Land:break;case AnimationEnum.WallSliding:if (!characterBody2D.IsOnWall()){AnimationState = AnimationEnum.Fall;}break;case AnimationEnum.Attack_1:if (isComboRequest && !isPlaying){AnimationState = AnimationEnum.Attack_2;isComboRequest = false;}else if (!isPlaying){AnimationState = AnimationEnum.Idel;}break;case AnimationEnum.Attack_2:if (isComboRequest && !isPlaying){AnimationState = AnimationEnum.Attack_3;isComboRequest = false;}else if (!isPlaying){AnimationState = AnimationEnum.Idel;}break;case AnimationEnum.Attack_3:if (!isPlaying){AnimationState = AnimationEnum.Idel;}break;}if (!Mathf.IsZeroApprox(Direction)){sprite2D.FlipH = Direction < 0;}PlayAnimation();}/// <summary>/// 播放动画/// </summary>private void PlayAnimation(){//printHelper.Debug(AnimationState.ToString());animationPlayer.Play(AnimationState.ToString());}/// <summary>/// 是否准备好了/// </summary>public override void Ready(){characterBody2D = Scene.GetNode<CharacterBody2D>("CharacterBody2D");camera2D = characterBody2D.GetNode<Camera2D>("Camera2D");sprite2D = characterBody2D.GetNode<Sprite2D>("Sprite2D");animationPlayer = characterBody2D.GetNode<AnimationPlayer>("AnimationPlayer");printHelper.Debug("加载完成");AnimationState = AnimationEnum.Idel;PlayAnimation();}/// <summary>/// 设置相机/// </summary>/// <param name="rect2"></param>public void SetCameraLimit(Rect2 rect2){camera2D.LimitLeft = (int)rect2.Position.X;//camera2D.LimitTop = (int)rect2.Position.Y;camera2D.LimitRight = (int)rect2.End.X;camera2D.LimitBottom = (int)rect2.End.Y;//printHelper.Debug(JsonConvert.SerializeObject(rect2));}}
}

实现效果

碰撞框和受攻击框

全局类

Godot Engine 4.2 简体中文文档 编写脚本 C#/.NET C# 全局类

这个的优点就是组件化，扩展性比较的强。类似于C# 的扩展函数，在原本的基础上面进行功能的加强。

推荐大家把Godot的高级API了解一下

HitBox:攻击框

using Godot;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace GodotNet_LegendOfPaladin2.GlobalClass
{[GlobalClass]public partial class Hitbox:Area2D{/// <summary>/// 在实例化事件中添加委托/// </summary>public Hitbox() {AreaEntered += Hitbox_AreaEntered;}/// <summary>/// 当有Area2D进入时/// </summary>/// <param name="area"></param>private void Hitbox_AreaEntered(Area2D area){//当进入的节点是继承Area2D的HurtBox的时候if (area is Hurtbox){OnAreaEnterd((Hurtbox)area);}}/// <summary>/// 攻击判断/// </summary>/// <param name="area"></param>public void OnAreaEnterd(Hurtbox area){GD.Print($"[Hit] {Owner.Name} => {area.Owner.Name}");}}}

HurtBox:受击框

using Godot;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace GodotNet_LegendOfPaladin2.GlobalClass
{[GlobalClass]public partial class Hurtbox:Area2D{}
}

实现效果

添加Player攻击

我们给三个Attack攻击都设置好了Disable关键帧之后，测试一下

总结

我其实省略了大部分的代码，详细的代码可以去看原视频的讲解