CatStation/Content.Client/Movement/Systems/ClientSpriteMovementSystem.cs

using Content.Shared.Movement.Components;
using Content.Shared.Movement.Events;
using Content.Shared.Movement.Systems;
using Robust.Client.GameObjects;

namespace Content.Client.Movement.Systems;

/// <summary>
/// Controls the switching of motion and standing still animation.
/// </summary>
public sealed partial class ClientSpriteMovementSystem : SharedSpriteMovementSystem
{
    [Dependency] private SpriteSystem _sprite = default!;
    [Dependency] private EntityQuery<SpriteComponent> _spriteQuery;

    protected override void OnSpriteMoveInput(Entity<SpriteMovementComponent> ent, ref SpriteMoveEvent args)
    {
        base.OnSpriteMoveInput(ent, ref args);
        UpdateSprite(ent, args.IsMoving);
    }

    [SubscribeLocalEvent]
    private void OnAfterAutoHandleState(Entity<SpriteMovementComponent> ent, ref AfterAutoHandleStateEvent args)
    {
        UpdateSprite(ent, ent.Comp.IsMoving);
    }

    private void UpdateSprite(Entity<SpriteMovementComponent> ent, bool isMoving)
    {
        if (!_spriteQuery.TryGetComponent(ent, out var sprite))
            return;

        if (isMoving)
        {
            foreach (var (layer, state) in ent.Comp.MovementLayers)
            {
                _sprite.LayerSetData((ent.Owner, sprite), layer, state);
            }
        }
        else
        {
            foreach (var (layer, state) in ent.Comp.NoMovementLayers)
            {
                _sprite.LayerSetData((ent.Owner, sprite), layer, state);
            }
        }
    }
}