Shuttle impact sounds (#11099)

Content.Server/Shuttles/Systems/ShuttleSystem.Impact.cs

@@ -0,0 +1,58 @@
+using Content.Server.Shuttles.Components;
+using Robust.Shared.Audio;
+using Robust.Shared.Map;
+using Robust.Shared.Physics.Dynamics;
+using Robust.Shared.Physics.Events;
+using Robust.Shared.Player;
+
+namespace Content.Server.Shuttles.Systems;
+
+public sealed partial class ShuttleSystem
+{
+    /// <summary>
+    /// Minimum velocity difference between 2 bodies for a shuttle "impact" to occur.
+    /// </summary>
+    private const int MinimumImpactVelocity = 10;
+
+    private readonly SoundCollectionSpecifier _shuttleImpactSound = new("ShuttleImpactSound");
+
+    private void InitializeImpact()
+    {
+        SubscribeLocalEvent<ShuttleComponent, StartCollideEvent>(OnShuttleCollide);
+    }
+
+    private void OnShuttleCollide(EntityUid uid, ShuttleComponent component, ref StartCollideEvent args)
+    {
+        var ourBody = args.OurFixture.Body;
+        var otherBody = args.OtherFixture.Body;
+
+        if (!HasComp<ShuttleComponent>(otherBody.Owner))
+            return;
+
+        // TODO: Would also be nice to have a continuous sound for scraping.
+        var ourXform = Transform(ourBody.Owner);
+
+        if (ourXform.MapUid == null)
+            return;
+
+        var otherXform = Transform(otherBody.Owner);
+
+        var ourPoint = ourXform.InvWorldMatrix.Transform(args.WorldPoint);
+        var otherPoint = otherXform.InvWorldMatrix.Transform(args.WorldPoint);
+
+        var ourVelocity = _physics.GetLinearVelocity(ourBody.Owner, ourPoint, ourBody, ourXform);
+        var otherVelocity = _physics.GetLinearVelocity(otherBody.Owner, otherPoint, otherBody, otherXform);
+        var jungleDiff = (ourVelocity - otherVelocity).Length;
+
+        if (jungleDiff < MinimumImpactVelocity)
+        {
+            return;
+        }
+
+        var coordinates = new EntityCoordinates(ourXform.MapUid.Value, args.WorldPoint);
+        var volume = MathF.Min(10f, 1f * MathF.Pow(jungleDiff, 0.5f) - 5f);
+        var audioParams = AudioParams.Default.WithVariation(0.05f).WithVolume(volume);
+
+        _audio.Play(_shuttleImpactSound, Filter.Pvs(coordinates, rangeMultiplier: 4f, entityMan: EntityManager), coordinates, audioParams);
+    }
+}