first commit

NitroxClient/GameLogic/Terrain.cs

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+using System.Collections;
+using System.Collections.Generic;
+using NitroxClient.Communication.Abstract;
+using NitroxModel.DataStructures.GameLogic;
+using NitroxModel.Packets;
+using NitroxModel_Subnautica.DataStructures;
+using UnityEngine;
+using WorldStreaming;
+
+namespace NitroxClient.GameLogic;
+
+public class Terrain
+{
+    private readonly IMultiplayerSession multiplayerSession;
+    private readonly IPacketSender packetSender;
+
+    private readonly HashSet<AbsoluteEntityCell> visibleCells = [];
+    private readonly List<AbsoluteEntityCell> addedCells = [];
+    private readonly List<AbsoluteEntityCell> removedCells = [];
+
+    private bool cellsPendingSync;
+    private float bufferedTime = 0f;
+    private const float TIME_BUFFER = 0.05f;
+
+    public Terrain(IMultiplayerSession multiplayerSession, IPacketSender packetSender)
+    {
+        this.multiplayerSession = multiplayerSession;
+        this.packetSender = packetSender;
+    }
+
+    public void CellLoaded(Int3 batchId, Int3 cellId, int level)
+    {
+        AbsoluteEntityCell cell = new(batchId.ToDto(), cellId.ToDto(), level);
+
+        if (!visibleCells.Contains(cell))
+        {
+            visibleCells.Add(cell);
+            addedCells.Add(cell);
+            cellsPendingSync = true;
+        }
+    }
+
+    public void CellUnloaded(Int3 batchId, Int3 cellId, int level)
+    {
+        AbsoluteEntityCell cell = new(batchId.ToDto(), cellId.ToDto(), level);
+
+        if (visibleCells.Contains(cell))
+        {
+            visibleCells.Remove(cell);
+            removedCells.Add(cell);
+            cellsPendingSync = true;
+        }
+    }
+
+    public void UpdateVisibility()
+    {
+        bufferedTime += Time.deltaTime;
+        if (bufferedTime >= TIME_BUFFER)
+        {
+            if (cellsPendingSync)
+            {
+                CellVisibilityChanged cellsChanged = new(multiplayerSession.Reservation.PlayerId, addedCells.ToArray(), removedCells.ToArray());
+                packetSender.Send(cellsChanged);
+
+                addedCells.Clear();
+                removedCells.Clear();
+
+                cellsPendingSync = false;
+            }
+
+            bufferedTime = 0f;
+        }
+    }
+
+    /// <summary>
+    /// Forces world streamer's to load the terrain around the MainCamera and waits until it's done to unfreeze the player.
+    /// </summary>
+    public static IEnumerator WaitForWorldLoad()
+    {
+        // In WorldStreamer.CreateStreamers() three coroutines are created to constantly call UpdateCenter() on the streamers
+        // We force these updates so that the world streamer gets busy instantly
+        WorldStreamer streamerV2 = LargeWorldStreamer.main.streamerV2;
+        streamerV2.UpdateStreamingCenter(MainCamera.camera.transform.position);
+        streamerV2.octreesStreamer.UpdateCenter(streamerV2.streamingCenter);
+        streamerV2.lowDetailOctreesStreamer.UpdateCenter(streamerV2.streamingCenter);
+        streamerV2.clipmapStreamer.UpdateCenter(streamerV2.streamingCenter);
+
+        yield return new WaitUntil(() => LargeWorldStreamer.main.IsWorldSettled());
+        Player.main.cinematicModeActive = false;
+    }
+}