78 lines
2.4 KiB
C#
78 lines
2.4 KiB
C#
#nullable enable
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using System;
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using System.Collections.Generic;
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using Robust.Shared.Serialization;
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using Robust.Shared.ViewVariables;
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namespace Content.Shared.Damage.Resistances
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{
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/// <summary>
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/// Set of resistances used by damageable objects.
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/// Each <see cref="DamageType"/> has a multiplier and flat damage
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/// reduction value.
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/// </summary>
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[Serializable, NetSerializable]
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public class ResistanceSet
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{
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public ResistanceSet()
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{
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foreach (var damageType in (DamageType[]) Enum.GetValues(typeof(DamageType)))
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{
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Resistances.Add(damageType, new ResistanceSetSettings(1f, 0));
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}
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}
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public ResistanceSet(ResistanceSetPrototype data)
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{
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ID = data.ID;
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Resistances = data.Resistances;
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}
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[ViewVariables]
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public string ID { get; } = string.Empty;
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[ViewVariables]
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public Dictionary<DamageType, ResistanceSetSettings> Resistances { get; } = new();
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/// <summary>
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/// Adjusts input damage with the resistance set values.
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/// Only applies reduction if the amount is damage (positive), not
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/// healing (negative).
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/// </summary>
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/// <param name="damageType">Type of damage.</param>
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/// <param name="amount">Incoming amount of damage.</param>
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public int CalculateDamage(DamageType damageType, int amount)
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{
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if (amount > 0) // Only apply reduction if it's healing, not damage.
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{
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amount -= Resistances[damageType].FlatReduction;
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if (amount <= 0)
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{
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return 0;
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}
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}
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amount = (int) Math.Ceiling(amount * Resistances[damageType].Coefficient);
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return amount;
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}
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}
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/// <summary>
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/// Settings for a specific damage type in a resistance set. Flat reduction is applied before the coefficient.
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/// </summary>
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[Serializable, NetSerializable]
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public readonly struct ResistanceSetSettings
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{
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[ViewVariables] public readonly float Coefficient;
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[ViewVariables] public readonly int FlatReduction;
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public ResistanceSetSettings(float coefficient, int flatReduction)
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{
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Coefficient = coefficient;
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FlatReduction = flatReduction;
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}
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}
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}
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