317 lines
10 KiB
C#
317 lines
10 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.inventory;
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using ColdMint.scripts.pickable;
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using ColdMint.scripts.projectile.decorator;
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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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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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private double _durability;
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private int _maxDamage;
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private int _minDamage;
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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>The impact area of the bullet</para>
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/// <para>子弹的碰撞区域</para>
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/// </summary>
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private Area2D? _area2D;
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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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private Vector2 _knockbackForce;
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public float Speed => GetMeta("Speed", "15").AsSingle();
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private List<IProjectileDecorator>? _projectileDecorators;
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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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//The bullet's impact detection area
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//子弹的碰撞检测区域
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_area2D = GetNode<Area2D>("CollisionDetectionArea");
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_area2D.Monitoring = true;
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_area2D.BodyEntered += OnBodyEnter;
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_area2D.BodyExited += OnBodyExited;
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_durability = GetMeta("Durability", "1").AsDouble();
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_maxDamage = GetMeta("MaxDamage", "7").AsInt32();
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_minDamage = GetMeta("MinDamage", "5").AsInt32();
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_damageType = GetMeta("DamageType", Config.DamageType.Physical).AsInt32();
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_knockbackForce = GetMeta("Knockback", Vector2.Zero).AsVector2();
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//life(ms)
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//子弹的存在时间(毫秒)
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_life = GetMeta("Life", "10000").AsInt64();
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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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}
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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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//Match any item now
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//现在使它识别任何物品
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if (target is IItem)
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{
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//Bullets are allowed to strike objects.
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//允许子弹撞击物品。
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return true;
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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 the bullet is in contact with the node</para>
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/// <para>当子弹与节点接触时</para>
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/// </summary>
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/// <param name="node"></param>
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protected virtual void OnBodyEnter(Node2D node)
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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 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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/// <summary>
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/// <para>When the bullet leaves the node</para>
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/// <para>当子弹离开节点时</para>
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/// </summary>
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/// <param name="node"></param>
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protected virtual void OnBodyExited(Node2D node)
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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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MoveAndSlide();
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}
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} |