108 lines
4.5 KiB
C#
108 lines
4.5 KiB
C#
using System.Diagnostics.CodeAnalysis;
|
|
using Content.Shared.Audio;
|
|
using Content.Shared.Hands.Components;
|
|
using Content.Shared.Popups;
|
|
using Content.Shared.Projectiles;
|
|
using Content.Shared.Weapons.Ranged.Events;
|
|
using Robust.Shared.GameStates;
|
|
using Robust.Shared.Physics.Systems;
|
|
using Robust.Shared.Random;
|
|
|
|
namespace Content.Shared.Weapons.Reflect;
|
|
|
|
/// <summary>
|
|
/// This handles reflecting projectiles and hitscan shots.
|
|
/// </summary>
|
|
public abstract class SharedReflectSystem : EntitySystem
|
|
{
|
|
[Dependency] private readonly IRobustRandom _random = default!;
|
|
[Dependency] private readonly SharedPopupSystem _popup = default!;
|
|
[Dependency] private readonly SharedPhysicsSystem _physics = default!;
|
|
[Dependency] private readonly SharedAudioSystem _audio = default!;
|
|
[Dependency] private readonly SharedTransformSystem _transform = default!;
|
|
|
|
public override void Initialize()
|
|
{
|
|
base.Initialize();
|
|
SubscribeLocalEvent<HandsComponent, ProjectileReflectAttemptEvent>(OnHandReflectProjectile);
|
|
SubscribeLocalEvent<HandsComponent, HitScanReflectAttemptEvent>(OnHandsReflectHitscan);
|
|
|
|
SubscribeLocalEvent<ReflectComponent, ComponentHandleState>(OnHandleState);
|
|
SubscribeLocalEvent<ReflectComponent, ComponentGetState>(OnGetState);
|
|
}
|
|
|
|
private static void OnHandleState(EntityUid uid, ReflectComponent component, ref ComponentHandleState args)
|
|
{
|
|
if (args.Current is not ReflectComponentState state) return;
|
|
component.Enabled = state.Enabled;
|
|
component.EnergeticChance = state.EnergeticChance;
|
|
component.KineticChance = state.KineticChance;
|
|
component.Spread = state.Spread;
|
|
}
|
|
|
|
private static void OnGetState(EntityUid uid, ReflectComponent component, ref ComponentGetState args)
|
|
{
|
|
args.State = new ReflectComponentState(component.Enabled, component.EnergeticChance, component.KineticChance, component.Spread);
|
|
}
|
|
|
|
private void OnHandReflectProjectile(EntityUid uid, HandsComponent hands, ref ProjectileReflectAttemptEvent args)
|
|
{
|
|
if (args.Cancelled)
|
|
return;
|
|
if (TryReflectProjectile(uid, hands.ActiveHandEntity, args.ProjUid, args.Component))
|
|
args.Cancelled = true;
|
|
}
|
|
|
|
private bool TryReflectProjectile(EntityUid user, EntityUid? reflector, EntityUid projectile, ProjectileComponent component)
|
|
{
|
|
var isEnergyProjectile = component.Damage.DamageDict.ContainsKey("Heat");
|
|
var isKineticProjectile = !isEnergyProjectile;
|
|
if (TryComp<ReflectComponent>(reflector, out var reflect) &&
|
|
reflect.Enabled &&
|
|
(isEnergyProjectile && _random.Prob(reflect.EnergeticChance) || isKineticProjectile && _random.Prob(reflect.KineticChance)))
|
|
{
|
|
var rotation = _random.NextAngle(-reflect.Spread / 2, reflect.Spread / 2).Opposite();
|
|
|
|
var relVel = _physics.GetMapLinearVelocity(projectile) - _physics.GetMapLinearVelocity(user);
|
|
var newVel = rotation.RotateVec(relVel);
|
|
_physics.SetLinearVelocity(projectile, newVel);
|
|
|
|
var locRot = Transform(projectile).LocalRotation;
|
|
var newRot = rotation.RotateVec(locRot.ToVec());
|
|
_transform.SetLocalRotation(projectile, newRot.ToAngle());
|
|
|
|
_popup.PopupEntity(Loc.GetString("reflect-shot"), user, PopupType.Small);
|
|
_audio.PlayPvs(reflect.OnReflect, user, AudioHelpers.WithVariation(0.05f, _random));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private void OnHandsReflectHitscan(EntityUid uid, HandsComponent hands, ref HitScanReflectAttemptEvent args)
|
|
{
|
|
if (args.Reflected)
|
|
return;
|
|
if (TryReflectHitscan(uid, hands.ActiveHandEntity, args.Direction, out var dir))
|
|
{
|
|
args.Direction = dir.Value;
|
|
args.Reflected = true;
|
|
}
|
|
}
|
|
|
|
private bool TryReflectHitscan(EntityUid user, EntityUid? reflector, Vector2 direction, [NotNullWhen(true)] out Vector2? newDirection)
|
|
{
|
|
if (TryComp<ReflectComponent>(reflector, out var reflect) &&
|
|
reflect.Enabled &&
|
|
_random.Prob(reflect.EnergeticChance))
|
|
{
|
|
_popup.PopupEntity(Loc.GetString("reflect-shot"), user, PopupType.Small);
|
|
_audio.PlayPvs(reflect.OnReflect, user, AudioHelpers.WithVariation(0.05f, _random));
|
|
var spread = _random.NextAngle(-reflect.Spread / 2, reflect.Spread / 2);
|
|
newDirection = -spread.RotateVec(direction);
|
|
return true;
|
|
}
|
|
newDirection = null;
|
|
return false;
|
|
}
|
|
}
|