381 lines
13 KiB
C#
381 lines
13 KiB
C#
using System;
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using System.Collections.Generic;
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using ColdMint.scripts.camp;
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using ColdMint.scripts.character;
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using ColdMint.scripts.damage;
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using ColdMint.scripts.pickable;
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using ColdMint.scripts.projectile.decorator;
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using ColdMint.scripts.utils;
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using Godot;
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namespace ColdMint.scripts.projectile;
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/// <summary>
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/// <para>Projectile</para>
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/// <para>抛射体</para>
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/// </summary>
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public partial class Projectile : CharacterBody2D
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{
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/// <summary>
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/// <para>life(ms)</para>
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/// <para>子弹的存在时间(毫秒)</para>
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/// </summary>
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[Export] private long _life;
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//The durability of the projectile
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//抛射体的耐久度
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//When the projectile hits the object, the durability will be reduced, and when the durability is less than or equal to 0, the projectile will be destroyed
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//当抛射体撞击到物体时，会减少耐久度，当耐久度小于等于0时，销毁抛射体
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[Export] private double _durability;
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[Export] private int _maxDamage;
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[Export] private int _minDamage;
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[Export] private int _damageType;
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/// <summary>
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/// <para>After this time destroy the projectile</para>
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/// <para>超过此时刻销毁抛射体</para>
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/// </summary>
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private DateTime? _destructionTime;
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/// <summary>
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/// <para>knockBack</para>
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/// <para>击退</para>
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/// </summary>
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/// <remarks>
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///<para>How much force does it have when hitting the character? Unit: Number of cells，The X direction of the force is inferred automatically.</para>
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///<para>当击中角色时带有多大的力？单位：格数，力的X方向是自动推断的。</para>
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/// </remarks>
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[Export] private Vector2 _knockBackForce;
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[Export] public float Speed;
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/// <summary>
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/// <para>Whether it bounces back after hitting an enemy or a wall</para>
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/// <para>是否撞到敌人或墙壁后反弹</para>
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/// </summary>
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[Export] private bool _enableBounce;
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/// <summary>
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/// <para>Can it penetrate the wall</para>
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/// <para>是否可以穿透墙壁</para>
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/// </summary>
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[Export] private bool _ignoreWall;
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/// <summary>
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/// <para>Enable the tracking of the enemy</para>
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/// <para>启用追踪敌人的功能</para>
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/// </summary>
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[Export] private bool _enableTracking;
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/// <summary>
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/// <para>The target dies and destroys the projectile at the same time</para>
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/// <para>在目标死亡后销毁抛射体</para>
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/// </summary>
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[Export] private bool _targetDiesDestroyProjectile;
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/// <summary>
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/// <para>The target</para>
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/// <para>设置目标</para>
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/// </summary>
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public Node2D? TargetNode { get; set; }
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private List<IProjectileDecorator>? _projectileDecorators;
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/// <summary>
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/// <para>Rays used to detect walls</para>
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/// <para>用于检测墙壁的射线</para>
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/// </summary>
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private RayCast2D? _wallRayCast;
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/// <summary>
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/// <para>The master of the weapon</para>
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/// <para>武器的主人</para>
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/// </summary>
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public new Node2D? Owner { get; set; }
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public override void _Ready()
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{
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if (!_ignoreWall)
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{
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_wallRayCast = new RayCast2D();
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_wallRayCast.SetCollisionMaskValue(Config.LayerNumber.Wall, true);
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_wallRayCast.SetCollisionMaskValue(Config.LayerNumber.Floor, true);
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NodeUtils.CallDeferredAddChild(this, _wallRayCast);
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}
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//If the existence time is less than or equal to 0, then it is set to exist for 10 seconds, and projectiles that exist indefinitely are prohibited
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//如果存在时间小于等于0，那么设置为存在10秒，禁止无限期存在的抛射体
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if (_life <= 0)
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{
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_life = 10000;
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}
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_destructionTime = DateTime.Now.AddMilliseconds(_life);
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SetCollisionLayerValue(Config.LayerNumber.Projectile, true);
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SetCollisionMaskValue(Config.LayerNumber.Wall, !_ignoreWall);
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SetCollisionMaskValue(Config.LayerNumber.Floor, !_ignoreWall);
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SetCollisionMaskValue(Config.LayerNumber.Player, true);
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SetCollisionMaskValue(Config.LayerNumber.Mob, true);
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//Platform collision layer is not allowed to collide
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//平台碰撞层不可碰撞
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SetCollisionMaskValue(Config.LayerNumber.Platform, false);
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if (TargetNode != null)
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{
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TargetNode.TreeExiting += () =>
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{
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//Clear the trace when the target is destroyed.
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//在目标被销毁的时候清空跟踪。
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TargetNode = null;
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if (_targetDiesDestroyProjectile)
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{
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OnTimeOut();
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}
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};
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}
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}
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/// <summary>
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/// <para>Add decorator</para>
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/// <para>添加装饰器</para>
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/// </summary>
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/// <param name="decorator">
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///<para>decorator</para>
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///<para>装饰器</para>
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/// </param>
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public void AddProjectileDecorator(IProjectileDecorator decorator)
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{
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_projectileDecorators ??= [];
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_projectileDecorators.Add(decorator);
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}
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/// <summary>
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/// <para>Remove decorator</para>
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/// <para>移除装饰器</para>
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/// </summary>
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/// <param name="decorator">
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///<para>decorator</para>
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///<para>装饰器</para>
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/// </param>
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/// <returns></returns>
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public bool RemoveProjectileDecorator(IProjectileDecorator decorator)
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{
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return _projectileDecorators?.Remove(decorator) ?? false;
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}
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/// <summary>
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/// <para>Detect whether harm is allowed</para>
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/// <para>检测是否允许造成伤害</para>
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/// </summary>
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/// <param name="owner"></param>
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/// <param name="target"></param>
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/// <returns></returns>
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private bool CanCauseHarm(Node2D? owner, Node2D target)
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{
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//We must know who the owner of the bullet is in order to determine whether it should cause damage or not
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//我们必须知道子弹的主人是谁，才能判断是否应该造成伤害
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if (owner == null)
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{
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return false;
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}
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if (owner is not CharacterTemplate ownerCharacterTemplate)
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{
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return false;
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}
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if (target is TileMapLayer)
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{
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//When we hit the tile, we return true to prevent the bullet from penetrating the tile.
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//撞击到瓦片时，我们返回true，是为了防止子弹穿透瓦片。
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return true;
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}
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if (target is PickAbleTemplate pickAbleTemplate)
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{
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//The picked-up item cannot resist the bullet.
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//被拾起的物品无法抵挡子弹。
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return !pickAbleTemplate.Picked;
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}
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if (target is not CharacterTemplate characterTemplate)
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{
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return false;
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}
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//First get the owner's camp and compare it with the target camp
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//先获取主人的阵营与目标阵营进行比较
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var canCauseHarm = CampManager.CanCauseHarm(CampManager.GetCamp(ownerCharacterTemplate.CampId),
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CampManager.GetCamp(characterTemplate.CampId));
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return canCauseHarm;
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}
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/// <summary>
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/// <para>Executive injury treatment</para>
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/// <para>执行伤害处理</para>
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/// </summary>
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/// <param name="owner"></param>
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/// <param name="target"></param>
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private void DoDamage(Node2D? owner, Node2D target)
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{
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if (target is CharacterTemplate characterTemplate)
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{
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//Allow damage to be caused
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//允许造成伤害
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var damage = new Damage
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{
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Attacker = owner,
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MaxDamage = _maxDamage,
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MinDamage = _minDamage
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};
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damage.CreateDamage();
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damage.MoveLeft = Velocity.X < 0;
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damage.Type = _damageType;
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var dead = characterTemplate.Damage(damage);
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if (dead)
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{
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//If the character is dead, then call OnKillCharacter
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//如果角色死亡了，那么调用OnKillCharacter
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InvokeDecorators(decorator => { decorator.OnKillCharacter(owner, characterTemplate); });
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}
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if (_knockBackForce != Vector2.Zero)
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{
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//If we set the attack force, then apply the force to the object
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//如果我们设置了攻退力，那么将力应用到对象上
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var force = new Vector2();
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var forceX = Math.Abs(_knockBackForce.X);
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if (Velocity.X < 0)
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{
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//Beat back to port
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//向左击退
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forceX = -forceX;
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}
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force.X = forceX * Config.CellSize;
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force.Y = _knockBackForce.Y * Config.CellSize;
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characterTemplate.AddForce(force);
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}
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}
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else if (target is PickAbleTemplate pickAbleTemplate)
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{
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if (_knockBackForce != Vector2.Zero)
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{
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//If we set the attack force, then apply the force to the object
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//如果我们设置了攻退力，那么将力应用到对象上
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var force = new Vector2();
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var forceX = Math.Abs(_knockBackForce.X);
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if (Velocity.X < 0)
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{
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//Beat back to port
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//向左击退
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forceX = -forceX;
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}
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force.X = forceX * Config.CellSize;
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force.Y = _knockBackForce.Y * Config.CellSize;
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pickAbleTemplate.ApplyImpulse(force);
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}
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}
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}
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/// <summary>
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/// <para>Call the method of the decorator</para>
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/// <para>调用装饰器的方法</para>
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/// </summary>
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/// <param name="projectileDecoratorAction"></param>
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private void InvokeDecorators(Action<IProjectileDecorator> projectileDecoratorAction)
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{
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if (_projectileDecorators == null)
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{
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return;
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}
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foreach (var decorator in _projectileDecorators)
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{
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projectileDecoratorAction(decorator);
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}
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}
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/// <summary>
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/// <para>When beyond the time of existence</para>
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/// <para>当超过存在时间</para>
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/// </summary>
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private void OnTimeOut()
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{
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QueueFree();
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}
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public override void _Process(double delta)
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{
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//If the existence time is exceeded, the projectile is destroyed
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//如果超过了存在时间，那么销毁抛射体
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if (DateTime.Now >= _destructionTime)
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{
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OnTimeOut();
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}
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}
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public override void _PhysicsProcess(double delta)
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{
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var collisionInfo = MoveAndCollide(Velocity * (float)delta);
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if (collisionInfo == null)
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{
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//No collision.
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//没有撞到任何东西。
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if (_enableTracking && TargetNode != null)
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{
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//Track the target
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//追踪目标
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//Gets a vector of the projectile pointing at the enemy's position.
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//得到抛射体指向敌人位置的向量。
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var desiredVelocity = TargetNode.GlobalPosition - GlobalPosition;
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if (!_ignoreWall && _wallRayCast != null)
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{
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_wallRayCast!.TargetPosition = desiredVelocity;
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if (_wallRayCast.IsColliding())
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{
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return;
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}
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}
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var actualDesiredVelocity = desiredVelocity.Normalized() * Speed;
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//The weight is smaller, the circle is larger.
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//weight越小，子弹绕的圈越大。
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Velocity = Velocity.Lerp(actualDesiredVelocity, 0.1f);
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}
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}
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else
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{
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//Bump into other objects.
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//撞到其他对象。
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if (_enableBounce)
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{
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Velocity = Velocity.Bounce(collisionInfo.GetNormal());
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}
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//Here we test whether harm is allowed, notice that for TileMap, we directly allow harm.
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//这里我们检测是否允许造成伤害，注意对于TileMap，我们直接允许造成伤害。
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var godotObject = collisionInfo.GetCollider();
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var node = (Node2D)godotObject;
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var canCauseHarm = CanCauseHarm(Owner, node);
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if (!canCauseHarm)
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{
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return;
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}
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DoDamage(Owner, node);
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//Please specify in the Mask who the bullet will collide with
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//请在Mask内配置子弹会和谁碰撞
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//When a bullet hits an object, its durability decreases
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//子弹撞击到物体时，耐久度减少
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_durability--;
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if (_durability <= 0)
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{
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//When the durability is less than or equal to 0, destroy the bullet
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//当耐久度小于等于0时，销毁子弹
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QueueFree();
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}
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}
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}
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} |