feat(traffic): implement autonomous City Traffic Engine and Living Urban Crowd Engine from CBT dump
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using Ananta.SDK.Network;
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namespace Ananta.Server.Gameplay.Crowd;
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public interface IUrbanCrowdDriver
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{
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Task<(bool Ok, ulong[] EntityIds)> SpawnCrowdPedestriansAsync(
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TcpSession session, uint npcFormworkId, uint poiActionId, float x, float y, float z, float facing);
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(bool HasPlayer, float X, float Y, float Z, float Yaw, uint RaidId) GetPlayerPosition(TcpSession session);
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}
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@@ -0,0 +1,358 @@
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using System.Collections.Concurrent;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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using Ananta.SDK.Network;
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namespace Ananta.Server.Gameplay.Crowd;
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public sealed class InteriorsFile
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{
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[JsonPropertyName("metadata")]
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public InteriorMetadata Metadata { get; set; } = new();
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[JsonPropertyName("spatialGrid")]
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public Dictionary<string, List<int>> SpatialGrid { get; set; } = new();
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[JsonPropertyName("interiors")]
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public List<InteriorEntry> Interiors { get; set; } = [];
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}
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public sealed class InteriorMetadata
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{
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[JsonPropertyName("totalInteriors")]
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public int TotalInteriors { get; set; }
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[JsonPropertyName("gridSize")]
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public float GridSize { get; set; } = 100f;
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}
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public sealed class InteriorEntry
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{
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[JsonPropertyName("id")]
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public int Id { get; set; }
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[JsonPropertyName("name")]
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public string Name { get; set; } = string.Empty;
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[JsonPropertyName("sector")]
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public string Sector { get; set; } = string.Empty;
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[JsonPropertyName("pos")]
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public List<float> Pos { get; set; } = [];
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}
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public sealed class PedestrianNetworkFile
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{
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[JsonPropertyName("metadata")]
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public PedestrianMetadata Metadata { get; set; } = new();
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[JsonPropertyName("spatialGrid")]
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public Dictionary<string, List<int>> SpatialGrid { get; set; } = new();
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[JsonPropertyName("lanes")]
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public List<PedestrianLaneEntry> Lanes { get; set; } = [];
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}
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public sealed class PedestrianMetadata
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{
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[JsonPropertyName("totalLanes")]
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public int TotalLanes { get; set; }
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[JsonPropertyName("gridSize")]
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public float GridSize { get; set; } = 100f;
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}
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public sealed class PedestrianLaneEntry
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{
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[JsonPropertyName("id")]
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public int Id { get; set; }
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[JsonPropertyName("tags")]
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public List<string> Tags { get; set; } = [];
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[JsonPropertyName("pts")]
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public List<List<float>> Pts { get; set; } = [];
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[JsonPropertyName("isCrosswalk")]
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public bool IsCrosswalk { get; set; }
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}
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public sealed class UrbanCrowdEngine
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{
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public static UrbanCrowdEngine Instance { get; } = new();
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private IUrbanCrowdDriver? _driver;
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private Func<IEnumerable<TcpSession>>? _sessionProvider;
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private InteriorsFile? _interiorsData;
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private PedestrianNetworkFile? _pedestrianData;
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private readonly ConcurrentDictionary<int, DateTime> _populatedInteriors = new();
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private readonly ConcurrentDictionary<ulong, ActiveCrowdNpc> _activeCrowd = new();
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private CancellationTokenSource? _cts;
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private Task? _crowdLoopTask;
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public bool Enabled { get; set; } = true;
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public int TargetPedestrianDensity { get; set; } = 15;
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public bool PopulateShops { get; set; } = true;
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// Verified civilian NPCs from Camp 2 with models
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private static readonly uint[] CitizenFormworkPool =
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[
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40120883, 40120884, 40120885, 40120886, 40120887,
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40120888, 40120889, 40120890, 40120891, 40120892,
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40120893, 40120894, 40120895, 40120896, 40120897
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];
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// Common idle / chatter / phone POI action IDs
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private static readonly uint[] AmbientPoiActions = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
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private readonly Random _rng = new();
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public sealed class ActiveCrowdNpc
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{
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public ulong EntityId { get; set; }
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public uint FormworkId { get; set; }
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public float X { get; set; }
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public float Y { get; set; }
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public float Z { get; set; }
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public DateTime SpawnedAt { get; set; }
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}
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public void Initialize(string clientDataPath, IUrbanCrowdDriver driver, Func<IEnumerable<TcpSession>> sessionProvider)
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{
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_driver = driver;
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_sessionProvider = sessionProvider;
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var interiorsPath = Path.Combine(clientDataPath, "World", "Interiors.json");
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var pedPath = Path.Combine(clientDataPath, "World", "PedestrianNetwork.json");
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try
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{
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if (File.Exists(interiorsPath))
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{
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var json = File.ReadAllText(interiorsPath);
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_interiorsData = JsonSerializer.Deserialize<InteriorsFile>(json);
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Console.WriteLine($"[CROWD] Loaded {_interiorsData?.Interiors.Count ?? 0} shop interiors.");
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}
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if (File.Exists(pedPath))
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{
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var json = File.ReadAllText(pedPath);
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_pedestrianData = JsonSerializer.Deserialize<PedestrianNetworkFile>(json);
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Console.WriteLine($"[CROWD] Loaded {_pedestrianData?.Lanes.Count ?? 0} pedestrian sidewalk/crosswalk lanes.");
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[CROWD] Error loading world crowd data: {ex.Message}");
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}
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Start();
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}
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public void Start()
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{
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if (_crowdLoopTask is not null && !_crowdLoopTask.IsCompleted)
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return;
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_cts = new CancellationTokenSource();
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_crowdLoopTask = Task.Run(() => CrowdLoopAsync(_cts.Token));
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Console.WriteLine("[CROWD] Living Urban Crowd Engine started.");
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}
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public void Stop()
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{
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_cts?.Cancel();
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}
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private async Task CrowdLoopAsync(CancellationToken token)
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{
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while (!token.IsCancellationRequested)
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{
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try
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{
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if (Enabled && _driver is not null && _sessionProvider is not null)
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{
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var sessions = _sessionProvider().ToList();
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foreach (var session in sessions)
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{
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await TickSessionCrowdAsync(session);
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}
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[CROWD-ERROR] Tick error: {ex.Message}");
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}
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try
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{
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// Run crowd checks every 2.5 seconds (crowd spawns do not require high frequency updates)
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await Task.Delay(2500, token);
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}
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catch (OperationCanceledException)
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{
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break;
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}
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}
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}
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private async Task TickSessionCrowdAsync(TcpSession session)
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{
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if (_driver is null)
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return;
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var (hasPlayer, px, py, pz, pyaw, _) = _driver.GetPlayerPosition(session);
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if (!hasPlayer || !float.IsFinite(px) || !float.IsFinite(pz))
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return;
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// 1. Populate nearby shops and cafes (within 60m)
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if (PopulateShops && _interiorsData is not null)
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{
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var grid = _interiorsData.SpatialGrid;
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var gridSize = _interiorsData.Metadata.GridSize;
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var centerCx = (int)MathF.Floor(px / gridSize);
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var centerCz = (int)MathF.Floor(pz / gridSize);
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for (var cx = centerCx - 1; cx <= centerCx + 1; cx++)
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{
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for (var cz = centerCz - 1; cz <= centerCz + 1; cz++)
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{
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var ckey = $"{cx}_{cz}";
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if (grid.TryGetValue(ckey, out var interiorIndices))
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{
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foreach (var idx in interiorIndices)
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{
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if (idx >= 0 && idx < _interiorsData.Interiors.Count)
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{
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var shop = _interiorsData.Interiors[idx];
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if (shop.Pos.Count < 3) continue;
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var sx = shop.Pos[0];
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var sy = shop.Pos[1];
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var sz = shop.Pos[2];
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var dx = sx - px;
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var dz = sz - pz;
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var distSq = dx * dx + dz * dz;
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if (distSq <= 60f * 60f && !_populatedInteriors.ContainsKey(shop.Id))
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{
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_populatedInteriors[shop.Id] = DateTime.UtcNow;
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// Spawn 1 shopkeeper/patron inside
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var formworkId = CitizenFormworkPool[_rng.Next(CitizenFormworkPool.Length)];
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var poiAction = AmbientPoiActions[_rng.Next(AmbientPoiActions.Length)];
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var facing = _rng.Next(0, 360);
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var (ok, ids) = await _driver.SpawnCrowdPedestriansAsync(
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session, formworkId, poiAction, sx, sy, sz, facing);
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if (ok && ids.Length > 0)
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{
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_activeCrowd[ids[0]] = new ActiveCrowdNpc
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{
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EntityId = ids[0],
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FormworkId = formworkId,
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X = sx,
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Y = sy,
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Z = sz,
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SpawnedAt = DateTime.UtcNow
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};
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Console.WriteLine($"[CROWD] Populated shop '{shop.Name}' with citizen NPC {formworkId}!");
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}
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}
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}
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}
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}
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}
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}
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}
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// 2. Sidewalk pedestrians
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if (_pedestrianData is not null && _activeCrowd.Count < TargetPedestrianDensity)
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{
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var pGrid = _pedestrianData.SpatialGrid;
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var pGridSize = _pedestrianData.Metadata.GridSize;
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var centerCx = (int)MathF.Floor(px / pGridSize);
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var centerCz = (int)MathF.Floor(pz / pGridSize);
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var candidateWaypoints = new List<(float X, float Y, float Z)>();
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for (var cx = centerCx - 1; cx <= centerCx + 1; cx++)
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{
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for (var cz = centerCz - 1; cz <= centerCz + 1; cz++)
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{
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var ckey = $"{cx}_{cz}";
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if (pGrid.TryGetValue(ckey, out var laneIds))
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{
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foreach (var laneId in laneIds)
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{
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if (laneId >= 0 && laneId < _pedestrianData.Lanes.Count)
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{
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var lane = _pedestrianData.Lanes[laneId];
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foreach (var pt in lane.Pts)
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{
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if (pt.Count < 3) continue;
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var ldx = pt[0] - px;
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var ldz = pt[2] - pz;
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var dSq = ldx * ldx + ldz * ldz;
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if (dSq >= 25f * 25f && dSq <= 80f * 80f)
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{
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candidateWaypoints.Add((pt[0], pt[1], pt[2]));
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}
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}
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}
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}
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}
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}
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}
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if (candidateWaypoints.Count > 0)
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{
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var wp = candidateWaypoints[_rng.Next(candidateWaypoints.Count)];
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var formworkId = CitizenFormworkPool[_rng.Next(CitizenFormworkPool.Length)];
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var poiAction = AmbientPoiActions[_rng.Next(AmbientPoiActions.Length)];
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var facing = _rng.Next(0, 360);
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var (ok, ids) = await _driver.SpawnCrowdPedestriansAsync(
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session, formworkId, poiAction, wp.X, wp.Y, wp.Z, facing);
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if (ok && ids.Length > 0)
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{
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_activeCrowd[ids[0]] = new ActiveCrowdNpc
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{
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EntityId = ids[0],
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FormworkId = formworkId,
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X = wp.X,
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Y = wp.Y,
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Z = wp.Z,
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SpawnedAt = DateTime.UtcNow
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};
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}
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}
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}
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}
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public CrowdStatus GetStatus() => new()
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{
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Enabled = Enabled,
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TargetDensity = TargetPedestrianDensity,
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ActiveCrowdCount = _activeCrowd.Count,
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PopulatedShopsCount = _populatedInteriors.Count,
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TotalInteriors = _interiorsData?.Interiors.Count ?? 0,
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TotalPedestrianLanes = _pedestrianData?.Lanes.Count ?? 0
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};
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}
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public sealed class CrowdStatus
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{
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public bool Enabled { get; set; }
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public int TargetDensity { get; set; }
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public int ActiveCrowdCount { get; set; }
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public int PopulatedShopsCount { get; set; }
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public int TotalInteriors { get; set; }
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public int TotalPedestrianLanes { get; set; }
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}
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