394 lines
16 KiB
C#
394 lines
16 KiB
C#
using System.Linq;
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using Content.Server.Cargo.Systems;
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using Content.Server.Examine;
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using Content.Server.Interaction;
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using Content.Server.Stunnable;
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using Content.Server.Weapons.Melee;
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using Content.Server.Weapons.Ranged.Components;
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using Content.Shared.Damage;
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using Content.Shared.Damage.Systems;
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using Content.Shared.Database;
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using Content.Shared.FixedPoint;
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using Content.Shared.Interaction.Components;
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using Content.Shared.Projectiles;
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using Content.Shared.Weapons.Melee;
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using Content.Shared.Weapons.Ranged;
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using Content.Shared.Weapons.Ranged.Components;
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using Content.Shared.Weapons.Ranged.Events;
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using Robust.Server.GameObjects;
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using Robust.Shared.Audio;
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using Robust.Shared.Map;
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using Robust.Shared.Physics;
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using Robust.Shared.Physics.Components;
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using Robust.Shared.Player;
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using Robust.Shared.Prototypes;
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using Robust.Shared.Utility;
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using SharedGunSystem = Content.Shared.Weapons.Ranged.Systems.SharedGunSystem;
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namespace Content.Server.Weapons.Ranged.Systems;
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public sealed partial class GunSystem : SharedGunSystem
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{
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[Dependency] private readonly IComponentFactory _factory = default!;
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[Dependency] private readonly ExamineSystem _examine = default!;
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[Dependency] private readonly InteractionSystem _interaction = default!;
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[Dependency] private readonly PricingSystem _pricing = default!;
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[Dependency] private readonly StaminaSystem _stamina = default!;
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[Dependency] private readonly StunSystem _stun = default!;
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public const float DamagePitchVariation = MeleeWeaponSystem.DamagePitchVariation;
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public const float GunClumsyChance = 0.5f;
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public override void Initialize()
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{
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base.Initialize();
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SubscribeLocalEvent<BallisticAmmoProviderComponent, PriceCalculationEvent>(OnBallisticPrice);
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}
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private void OnBallisticPrice(EntityUid uid, BallisticAmmoProviderComponent component, ref PriceCalculationEvent args)
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{
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if (string.IsNullOrEmpty(component.FillProto) || component.UnspawnedCount == 0)
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return;
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if (!ProtoManager.TryIndex<EntityPrototype>(component.FillProto, out var proto))
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{
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Sawmill.Error($"Unable to find fill prototype for price on {component.FillProto} on {ToPrettyString(uid)}");
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return;
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}
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// Probably good enough for most.
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var price = _pricing.GetEstimatedPrice(proto);
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args.Price += price * component.UnspawnedCount;
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}
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public override void Shoot(GunComponent gun, List<IShootable> ammo, EntityCoordinates fromCoordinates, EntityCoordinates toCoordinates, EntityUid? user = null)
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{
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// Try a clumsy roll
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if (TryComp<ClumsyComponent>(user, out var clumsy))
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{
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for (var i = 0; i < ammo.Count; i++)
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{
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if (_interaction.TryRollClumsy(user.Value, GunClumsyChance, clumsy))
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{
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// Wound them
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Damageable.TryChangeDamage(user, clumsy.ClumsyDamage, origin: user);
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_stun.TryParalyze(user.Value, TimeSpan.FromSeconds(3f), true);
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// Apply salt to the wound ("Honk!")
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Audio.PlayPvs(new SoundPathSpecifier("/Audio/Weapons/Guns/Gunshots/bang.ogg"), gun.Owner);
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Audio.PlayPvs(new SoundPathSpecifier("/Audio/Items/bikehorn.ogg"), gun.Owner);
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PopupSystem.PopupEntity(Loc.GetString("gun-clumsy"), user.Value);
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Del(gun.Owner);
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return;
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}
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}
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}
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var fromMap = fromCoordinates.ToMap(EntityManager);
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var toMap = toCoordinates.ToMapPos(EntityManager);
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var mapDirection = toMap - fromMap.Position;
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var mapAngle = mapDirection.ToAngle();
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var angle = GetRecoilAngle(Timing.CurTime, gun, mapDirection.ToAngle());
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// If applicable, this ensures the projectile is parented to grid on spawn, instead of the map.
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EntityCoordinates fromEnt = MapManager.TryFindGridAt(fromMap, out var grid)
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? fromCoordinates.WithEntityId(grid.Owner, EntityManager)
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: new(MapManager.GetMapEntityId(fromMap.MapId), fromMap.Position);
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// Update shot based on the recoil
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toMap = fromMap.Position + angle.ToVec() * mapDirection.Length;
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mapDirection = toMap - fromMap.Position;
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var gunVelocity = Physics.GetMapLinearVelocity(gun.Owner);
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// I must be high because this was getting tripped even when true.
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// DebugTools.Assert(direction != Vector2.Zero);
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var shotProjectiles = new List<EntityUid>(ammo.Count);
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foreach (var shootable in ammo)
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{
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switch (shootable)
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{
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// Cartridge shoots something else
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case CartridgeAmmoComponent cartridge:
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if (!cartridge.Spent)
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{
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if (cartridge.Count > 1)
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{
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var angles = LinearSpread(mapAngle - cartridge.Spread / 2,
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mapAngle + cartridge.Spread / 2, cartridge.Count);
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for (var i = 0; i < cartridge.Count; i++)
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{
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var uid = Spawn(cartridge.Prototype, fromEnt);
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ShootProjectile(uid, angles[i].ToVec(), gunVelocity, user, gun.ProjectileSpeed);
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shotProjectiles.Add(uid);
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}
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}
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else
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{
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var uid = Spawn(cartridge.Prototype, fromEnt);
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ShootProjectile(uid, mapDirection, gunVelocity, user, gun.ProjectileSpeed);
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shotProjectiles.Add(uid);
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}
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//signal ChemicalAmmo to transfer solution
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RaiseLocalEvent(cartridge.Owner, new AmmoShotEvent()
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{
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FiredProjectiles = shotProjectiles,
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});
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SetCartridgeSpent(cartridge, true);
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MuzzleFlash(gun.Owner, cartridge, user);
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Audio.PlayPredicted(gun.SoundGunshot, gun.Owner, user);
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if (cartridge.DeleteOnSpawn)
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Del(cartridge.Owner);
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}
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else
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{
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Audio.PlayPredicted(gun.SoundEmpty, gun.Owner, user);
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}
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// Something like ballistic might want to leave it in the container still
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if (!cartridge.DeleteOnSpawn && !Containers.IsEntityInContainer(cartridge.Owner))
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EjectCartridge(cartridge.Owner);
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Dirty(cartridge);
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break;
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// Ammo shoots itself
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case AmmoComponent newAmmo:
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shotProjectiles.Add(newAmmo.Owner);
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MuzzleFlash(gun.Owner, newAmmo, user);
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Audio.PlayPredicted(gun.SoundGunshot, gun.Owner, user);
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// Do a throw
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if (!HasComp<ProjectileComponent>(newAmmo.Owner))
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{
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RemComp<AmmoComponent>(newAmmo.Owner);
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// TODO: Someone can probably yeet this a billion miles so need to pre-validate input somewhere up the call stack.
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ThrowingSystem.TryThrow(newAmmo.Owner, mapDirection, gun.ProjectileSpeed, user);
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break;
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}
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ShootProjectile(newAmmo.Owner, mapDirection, gunVelocity, user, gun.ProjectileSpeed);
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break;
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case HitscanPrototype hitscan:
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var ray = new CollisionRay(fromMap.Position, mapDirection.Normalized, hitscan.CollisionMask);
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var rayCastResults =
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Physics.IntersectRay(fromMap.MapId, ray, hitscan.MaxLength, user, false).ToList();
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if (rayCastResults.Count >= 1)
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{
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var result = rayCastResults[0];
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var hitEntity = result.HitEntity;
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var distance = result.Distance;
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FireEffects(fromCoordinates, distance, mapDirection.ToAngle(), hitscan, hitEntity);
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if (hitscan.StaminaDamage > 0f)
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_stamina.TakeStaminaDamage(hitEntity, hitscan.StaminaDamage, source:user);
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var dmg = hitscan.Damage;
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bool deleted = false;
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string hitName = ToPrettyString(hitEntity);
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if (dmg != null)
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dmg = Damageable.TryChangeDamage(hitEntity, dmg, origin: user);
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// check null again, as TryChangeDamage returns modified damage values
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if (dmg != null)
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{
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deleted = Deleted(hitEntity);
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if (!deleted)
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{
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if (dmg.Total > FixedPoint2.Zero)
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RaiseNetworkEvent(new DamageEffectEvent(Color.Red, new List<EntityUid> {result.HitEntity}), Filter.Pvs(hitEntity, entityManager: EntityManager));
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// TODO get fallback position for playing hit sound.
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PlayImpactSound(hitEntity, dmg, hitscan.Sound, hitscan.ForceSound);
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}
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if (user != null)
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{
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Logs.Add(LogType.HitScanHit,
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$"{ToPrettyString(user.Value):user} hit {hitName:target} using hitscan and dealt {dmg.Total:damage} damage");
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}
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else
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{
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Logs.Add(LogType.HitScanHit,
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$"Hit {hitName:target} using hitscan and dealt {dmg.Total:damage} damage");
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}
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}
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}
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else
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{
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FireEffects(fromCoordinates, hitscan.MaxLength, mapDirection.ToAngle(), hitscan);
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}
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Audio.PlayPredicted(gun.SoundGunshot, gun.Owner, user);
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break;
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default:
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throw new ArgumentOutOfRangeException();
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}
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}
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RaiseLocalEvent(gun.Owner, new AmmoShotEvent()
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{
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FiredProjectiles = shotProjectiles,
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}, false);
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}
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public void ShootProjectile(EntityUid uid, Vector2 direction, Vector2 gunVelocity, EntityUid? user = null, float speed = 20f)
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{
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var physics = EnsureComp<PhysicsComponent>(uid);
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Physics.SetBodyStatus(physics, BodyStatus.InAir);
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var targetMapVelocity = gunVelocity + direction.Normalized * speed;
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var currentMapVelocity = Physics.GetMapLinearVelocity(uid, physics);
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var finalLinear = physics.LinearVelocity + targetMapVelocity - currentMapVelocity;
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Physics.SetLinearVelocity(uid, finalLinear, body: physics);
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if (user != null)
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{
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var projectile = EnsureComp<ProjectileComponent>(uid);
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Projectiles.SetShooter(projectile, user.Value);
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}
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Transform(uid).WorldRotation = direction.ToWorldAngle();
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}
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/// <summary>
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/// Gets a linear spread of angles between start and end.
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/// </summary>
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/// <param name="start">Start angle in degrees</param>
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/// <param name="end">End angle in degrees</param>
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/// <param name="intervals">How many shots there are</param>
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private Angle[] LinearSpread(Angle start, Angle end, int intervals)
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{
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var angles = new Angle[intervals];
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DebugTools.Assert(intervals > 1);
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for (var i = 0; i <= intervals - 1; i++)
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{
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angles[i] = new Angle(start + (end - start) * i / (intervals - 1));
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}
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return angles;
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}
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private Angle GetRecoilAngle(TimeSpan curTime, GunComponent component, Angle direction)
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{
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var timeSinceLastFire = (curTime - component.LastFire).TotalSeconds;
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var newTheta = MathHelper.Clamp(component.CurrentAngle.Theta + component.AngleIncrease.Theta - component.AngleDecay.Theta * timeSinceLastFire, component.MinAngle.Theta, component.MaxAngle.Theta);
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component.CurrentAngle = new Angle(newTheta);
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component.LastFire = component.NextFire;
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// Convert it so angle can go either side.
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var random = Random.NextFloat(-0.5f, 0.5f);
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var spread = component.CurrentAngle.Theta * random;
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var angle = new Angle(direction.Theta + component.CurrentAngle.Theta * random);
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DebugTools.Assert(spread <= component.MaxAngle.Theta);
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return angle;
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}
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protected override void Popup(string message, EntityUid? uid, EntityUid? user) {}
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protected override void CreateEffect(EntityUid uid, MuzzleFlashEvent message, EntityUid? user = null)
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{
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var filter = Filter.Pvs(uid, entityManager: EntityManager);
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if (TryComp<ActorComponent>(user, out var actor))
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filter.RemovePlayer(actor.PlayerSession);
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RaiseNetworkEvent(message, filter);
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}
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public void PlayImpactSound(EntityUid otherEntity, DamageSpecifier? modifiedDamage, SoundSpecifier? weaponSound, bool forceWeaponSound)
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{
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DebugTools.Assert(!Deleted(otherEntity), "Impact sound entity was deleted");
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// Like projectiles and melee,
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// 1. Entity specific sound
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// 2. Ammo's sound
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// 3. Nothing
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var playedSound = false;
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if (!forceWeaponSound && modifiedDamage != null && modifiedDamage.Total > 0 && TryComp<RangedDamageSoundComponent>(otherEntity, out var rangedSound))
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{
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var type = MeleeWeaponSystem.GetHighestDamageSound(modifiedDamage, ProtoManager);
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if (type != null && rangedSound.SoundTypes?.TryGetValue(type, out var damageSoundType) == true)
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{
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Audio.PlayPvs(damageSoundType, otherEntity, AudioParams.Default.WithVariation(DamagePitchVariation));
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playedSound = true;
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}
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else if (type != null && rangedSound.SoundGroups?.TryGetValue(type, out var damageSoundGroup) == true)
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{
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Audio.PlayPvs(damageSoundGroup, otherEntity, AudioParams.Default.WithVariation(DamagePitchVariation));
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playedSound = true;
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}
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}
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if (!playedSound && weaponSound != null)
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{
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Audio.PlayPvs(weaponSound, otherEntity);
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}
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}
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// TODO: Pseudo RNG so the client can predict these.
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#region Hitscan effects
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private void FireEffects(EntityCoordinates fromCoordinates, float distance, Angle mapDirection, HitscanPrototype hitscan, EntityUid? hitEntity = null)
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{
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// Lord
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// Forgive me for the shitcode I am about to do
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// Effects tempt me not
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var sprites = new List<(EntityCoordinates coordinates, Angle angle, SpriteSpecifier sprite, float scale)>();
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var gridUid = fromCoordinates.GetGridUid(EntityManager);
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var angle = mapDirection;
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// We'll get the effects relative to the grid / map of the firer
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// Look you could probably optimise this a bit with redundant transforms at this point.
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if (TryComp<TransformComponent>(gridUid, out var gridXform))
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{
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var (_, gridRot, gridInvMatrix) = gridXform.GetWorldPositionRotationInvMatrix();
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fromCoordinates = new EntityCoordinates(gridUid.Value,
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gridInvMatrix.Transform(fromCoordinates.ToMapPos(EntityManager)));
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// Use the fallback angle I guess?
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angle -= gridRot;
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}
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if (distance >= 1f)
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{
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if (hitscan.MuzzleFlash != null)
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{
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sprites.Add((fromCoordinates.Offset(angle.ToVec().Normalized / 2), angle, hitscan.MuzzleFlash, 1f));
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}
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if (hitscan.TravelFlash != null)
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{
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sprites.Add((fromCoordinates.Offset(angle.ToVec() * (distance + 0.5f) / 2), angle, hitscan.TravelFlash, distance - 1.5f));
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}
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}
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if (hitscan.ImpactFlash != null)
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{
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sprites.Add((fromCoordinates.Offset(angle.ToVec() * distance), angle.FlipPositive(), hitscan.ImpactFlash, 1f));
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}
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if (sprites.Count > 0)
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{
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RaiseNetworkEvent(new HitscanEvent
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{
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Sprites = sprites,
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}, Filter.Pvs(fromCoordinates, entityMan: EntityManager));
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}
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}
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#endregion
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}
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