1350 lines
57 KiB
C#
1350 lines
57 KiB
C#
using System;
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using System.Collections.Generic;
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using AcDream.App.Rendering.Wb;
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using AcDream.Core.Terrain;
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using AcDream.Core.World;
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namespace AcDream.App.Streaming;
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/// <summary>
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/// Called once per frame from <c>GameWindow.OnUpdate</c>. Owns the
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/// <see cref="StreamingRegion"/> and uses delegates into
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/// <see cref="LandblockStreamer"/> so tests can inject fakes. All work
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/// happens on the render thread; the streamer itself is background.
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///
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/// <remarks>
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/// Threading: not thread-safe. All calls must happen on the render thread.
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/// </remarks>
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/// </summary>
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public sealed class StreamingController : IStreamingFrameBackend
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{
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private sealed class OriginRecenterRetirement
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{
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public bool RadiiConverged;
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public bool GenerationAdvanced;
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public bool PendingLoadsCleared;
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public bool DeferredApplyCleared;
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public bool RegionCleared;
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public List<uint>? ResidentIds;
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public int RetirementCursor;
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public bool PreparationCommitted;
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public (int X, int Y, bool IsSealedDungeon)? Destination;
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public bool DestinationConfigured;
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public bool DestinationLoadEnqueued;
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}
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private readonly Action<uint, LandblockStreamJobKind, ulong> _enqueueLoad;
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private readonly Action<uint, ulong> _enqueueUnload;
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private readonly Func<int, IReadOnlyList<LandblockStreamResult>> _drainCompletions;
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private readonly Action? _clearPendingLoads;
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private readonly LandblockPresentationPipeline _presentation;
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private readonly GpuWorldState _state;
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private StreamingRegion? _region;
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private RadiiReconfiguration? _pendingRadiiReconfiguration;
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private bool _advancingRadiiReconfiguration;
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private (int NearRadius, int FarRadius)? _deferredRadiiRequest;
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private OriginRecenterRetirement? _originRecenterRetirement;
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private bool _advancingOriginRecenter;
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// Hard streaming boundaries advance this token. Worker completions carry
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// the generation captured at enqueue time, so an old overlapping load or
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// unload cannot mutate the replacement window after a portal recenter.
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private ulong _generation;
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// True while streaming is collapsed to the single dungeon landblock the
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// player stands in (the dungeon gate, #133 FPS). AC dungeons have NO
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// adjacent landblocks — neighbors are unrelated ocean-grid dungeons that
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// are never visible, so we stop loading the 25×25 window entirely.
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private bool _collapsed;
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// The dungeon landblock id we collapsed onto. Once collapsed we key the
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// gate on this STABLE landblock, not the per-frame insideDungeon signal:
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// CurrCell can momentarily resolve to null/outdoor mid-frame, and gating
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// expand on that flicker thrashes collapse↔expand (reload storms + a light
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// leak). We only expand when the observer actually moves to a different
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// landblock (teleport/portal out).
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private uint _collapsedCenter;
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/// <summary>
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/// Near-tier radius (LBs from observer that load full detail: terrain +
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/// scenery + entities). Runtime changes go through
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/// <see cref="ReconfigureRadii"/>.
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/// </summary>
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public int NearRadius { get; private set; }
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/// <summary>
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/// Far-tier radius (LBs from observer that load terrain only).
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/// </summary>
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public int FarRadius { get; private set; }
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/// <summary>
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/// Cap on completions drained per <see cref="Tick"/> call. The cap is
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/// the GPU upload budget for one frame: terrain mesh + per-entity GfxObj
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/// sub-mesh uploads + texture uploads for one landblock take a few ms;
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/// applying 25 of them in a single frame produces a memory spike
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/// (observed: out-of-memory crash on the 5×5 first-frame load).
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///
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/// <para>
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/// 4 is the original async-streamer value; it spreads a 5×5 first-frame
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/// load over ~7 frames (~116ms at 60fps), which is below the human
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/// perception threshold. Spawn races that previously dropped entities
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/// while landblocks were in flight are now handled by
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/// <see cref="GpuWorldState"/>'s pending-spawn list, so spreading
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/// completions doesn't lose any data.
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/// </para>
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/// </summary>
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public int MaxCompletionsPerFrame { get; set; } = 4;
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/// <summary>
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/// #138: the teleport destination landblock id. When non-zero,
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/// <see cref="DrainAndApply"/> applies this landblock's
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/// <see cref="LandblockStreamResult.Loaded"/> or
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/// <see cref="LandblockStreamResult.Promoted"/> completion immediately
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/// — even if it sits past the <see cref="MaxCompletionsPerFrame"/>
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/// position in the outbox — so the player can materialise at the
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/// destination without waiting for every earlier-queued landblock to
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/// drain first. Non-priority completions drained past it are buffered
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/// in <see cref="_deferredApply"/> and applied over subsequent frames,
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/// so no completions are lost and there is no GPU spike.
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///
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/// <para>Set by <c>GameWindow</c> when a teleport starts; reset to 0
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/// once the destination landblock has been applied (or when the
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/// teleport destination changes).</para>
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/// </summary>
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public uint PriorityLandblockId { get; set; }
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/// <summary>
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/// 2026-06-22: the radius (in landblocks, Chebyshev) around
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/// <see cref="PriorityLandblockId"/> that <see cref="DrainAndApply"/> eager-applies
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/// ahead of the per-frame budget. 0 (default) = only the single center landblock — the
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/// original priority behaviour. A teleport sets this to the near ring so the player's
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/// IMMEDIATE SURROUNDINGS (terrain + collision + scenery) are resident on arrival, not
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/// just the one landblock they stand on. Without it, only the destination landblock
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/// applies immediately and everything around it drains at <see cref="MaxCompletionsPerFrame"/>,
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/// so the player arrives to a near-empty world (the "Fort Tethana only one landblock
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/// loaded" symptom) and their cell-walk can't root into neighbour cells yet (the
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/// transient walk-through-walls). The far ring still drains at the budget. The eager
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/// apply runs while the portal viewport replaces the world, so the GPU spike is hidden.
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/// </summary>
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public int PriorityRadius { get; set; }
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// [FRAME-DIAG] (read by GameWindow's ACDREAM_WB_DIAG rollup): the standing
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// deferred-LOAD backlog. A non-zero value during/after a teleport is the
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// GPU-upload tail draining at MaxCompletionsPerFrame. Removable probe surface.
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public int DeferredApplyBacklog => _deferredApply.Count;
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public int PendingRetirementCount => _presentation.PendingRetirementCount;
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internal bool IsCollapsedToDungeon => _collapsed;
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/// <summary>
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/// True once every in-bounds landblock in the requested Chebyshev ring has
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/// crossed the render-thread publication barrier. Worker completion and
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/// world-state registration are not sufficient: all static GfxObj and
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/// EnvCell shell meshes must have completed their render-thread upload.
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/// Portal-space exit uses this alongside physics residency so the world
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/// cannot be revealed while its render slots are still absent.
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/// </summary>
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public bool IsRenderNeighborhoodResident(uint cellOrLandblockId, int radius)
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{
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if (radius < 0)
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throw new ArgumentOutOfRangeException(nameof(radius));
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// LandDefs::InboundValidCellId validates both map axes and the low-word
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// class (outdoor cell, EnvCell, or canonical landblock sentinel).
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if (!AcDream.Core.Physics.LandDefs.InboundValidCellId(cellOrLandblockId))
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return false;
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int cx = (int)((cellOrLandblockId >> 24) & 0xFFu);
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int cy = (int)((cellOrLandblockId >> 16) & 0xFFu);
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for (int dx = -radius; dx <= radius; dx++)
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for (int dy = -radius; dy <= radius; dy++)
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{
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int nx = cx + dx;
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int ny = cy + dy;
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// Match PhysicsEngine.IsNeighborhoodTerrainResident: the outer
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// 0xFF coordinate has no loadable neighbour beyond it.
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if (nx < 0 || nx > 254 || ny < 0 || ny > 254)
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continue;
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uint canonical = ((uint)nx << 24) | ((uint)ny << 16) | 0xFFFFu;
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if (!_state.IsNearTier(canonical) || !_state.IsRenderReady(canonical))
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return false;
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}
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return true;
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}
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// [FRAME-DIAG]: full-window presentation retirements include explicit
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// reloads and shared-origin recenter barriers. Both retire and later
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// re-upload the complete resident window.
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public int FullWindowRetirementCount { get; private set; }
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public int LastFullWindowRetirementLandblockCount { get; private set; }
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// Completions that were drained past a priority item get buffered here
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// so they still apply over subsequent frames without loss.
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private readonly List<LandblockStreamResult> _deferredApply = new();
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/// <summary>
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/// Internal compatibility seam for hermetic controller policy tests. Live
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/// composition cannot supply presentation callbacks; it must use the
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/// concrete pipeline constructor below.
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/// </summary>
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internal StreamingController(
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Action<uint, LandblockStreamJobKind, ulong> enqueueLoad,
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Action<uint, ulong> enqueueUnload,
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Func<int, IReadOnlyList<LandblockStreamResult>> drainCompletions,
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Action<LandblockBuild, LandblockMeshData> applyTerrain,
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GpuWorldState state,
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int nearRadius,
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int farRadius,
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Action<uint>? removeTerrain = null,
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Action<uint>? demoteNearLayer = null,
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Action? clearPendingLoads = null,
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Action<uint>? onLandblockLoaded = null,
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Action<EnvCellLandblockBuild>? ensureEnvCellMeshes = null,
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LandblockRetirementCoordinator? retirementCoordinator = null)
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: this(
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enqueueLoad,
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enqueueUnload,
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drainCompletions,
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state,
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nearRadius,
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farRadius,
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new LandblockPresentationPipeline(
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applyTerrain,
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state,
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onLandblockLoaded,
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ensureEnvCellMeshes,
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retirementCoordinator,
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removeTerrain,
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demoteNearLayer),
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clearPendingLoads)
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{
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}
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/// <summary>
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/// Concrete presentation path. Its pipeline is the sole presentation and
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/// retirement owner, so no legacy publication delegate can be supplied or
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/// silently ignored.
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/// </summary>
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public StreamingController(
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Action<uint, LandblockStreamJobKind, ulong> enqueueLoad,
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Action<uint, ulong> enqueueUnload,
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Func<int, IReadOnlyList<LandblockStreamResult>> drainCompletions,
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GpuWorldState state,
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int nearRadius,
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int farRadius,
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LandblockPresentationPipeline presentationPipeline,
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Action? clearPendingLoads = null)
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{
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_enqueueLoad = enqueueLoad;
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_enqueueUnload = enqueueUnload;
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_drainCompletions = drainCompletions;
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_clearPendingLoads = clearPendingLoads;
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_state = state;
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_presentation = presentationPipeline
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?? throw new ArgumentNullException(nameof(presentationPipeline));
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if (!_presentation.MatchesState(_state))
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{
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throw new ArgumentException(
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"The presentation pipeline must own the controller's world state.",
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nameof(presentationPipeline));
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}
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NearRadius = nearRadius;
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FarRadius = farRadius;
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}
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/// <summary>
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/// Reconciles an active outdoor streaming window to new quality radii
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/// without replacing the worker/controller or blindly bootstrapping data
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/// already published in <see cref="GpuWorldState"/>. Pending jobs from the
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/// old window are invalidated by generation; resident blocks are retained,
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/// promoted, demoted, loaded, or unloaded from their actual current tier.
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/// A sealed dungeon remains radius-zero until its normal exit edge while
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/// remembering the new outdoor radii for that exit.
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/// </summary>
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public void ReconfigureRadii(int nearRadius, int farRadius)
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{
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if (nearRadius < 0)
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throw new ArgumentOutOfRangeException(nameof(nearRadius));
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if (farRadius < nearRadius)
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throw new ArgumentOutOfRangeException(
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nameof(farRadius),
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"Far radius must be greater than or equal to near radius.");
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// A radius transaction may not admit work after an origin-recenter
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// snapshot has been captured. Retain only the latest requested radii;
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// the first Tick after origin commit applies them to the new frame.
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if (_originRecenterRetirement is not null)
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{
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_deferredRadiiRequest = (nearRadius, farRadius);
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return;
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}
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// Queue callbacks are injected seams and can synchronously reenter the
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// controller. Last-request-wins deferral keeps the active mutation
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// cursor stable; the request is applied after the current transaction
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// converges instead of recursively replaying its active step.
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if (_advancingRadiiReconfiguration)
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{
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_deferredRadiiRequest = (nearRadius, farRadius);
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return;
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}
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// A prior callback may have failed after this controller accepted the
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// request. Resume that exact transaction before considering another
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// target; replacing it would orphan already-admitted generation work.
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if (_pendingRadiiReconfiguration is not null)
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AdvanceRadiiReconfiguration();
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// This explicit call is newer than any request deferred by a prior
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// failed attempt and therefore supersedes it.
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_deferredRadiiRequest = null;
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if (nearRadius == NearRadius && farRadius == FarRadius)
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return;
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// A staged old-window publication must either finish or fail before
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// the desired-tier snapshot below is computed. Otherwise a landblock
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// that becomes spatially resident during convergence is absent from
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// the reconfiguration mutation ledger.
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ConvergePendingPublications();
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if (_collapsed || _region is null)
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{
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NearRadius = nearRadius;
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FarRadius = farRadius;
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return;
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}
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var rebuilt = new StreamingRegion(
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_region.CenterX,
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_region.CenterY,
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nearRadius,
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farRadius);
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TwoTierDiff bootstrap = rebuilt.ComputeFirstTickDiff();
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var desiredNear = new HashSet<uint>(bootstrap.ToLoadNear);
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var desiredFar = new HashSet<uint>(bootstrap.ToLoadFar);
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var mutations = new List<RadiiMutation>();
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uint[] loaded = [.. _state.LoadedLandblockIds];
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for (int i = 0; i < loaded.Length; i++)
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{
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uint id = loaded[i];
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if (desiredNear.Contains(id))
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{
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if (!_state.IsNearTier(id))
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mutations.Add(new RadiiMutation(
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() => EnqueueLoad(id, LandblockStreamJobKind.PromoteToNear)));
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}
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else if (desiredFar.Contains(id))
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{
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if (_state.IsNearTier(id))
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mutations.Add(new RadiiMutation(() => DemoteLandblock(id)));
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}
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else
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{
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mutations.Add(new RadiiMutation(() => EnqueueUnload(id)));
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}
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}
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foreach (uint id in desiredNear)
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if (!_state.IsLoaded(id))
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mutations.Add(new RadiiMutation(
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() => EnqueueLoad(id, LandblockStreamJobKind.LoadNear)));
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foreach (uint id in desiredFar)
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if (!_state.IsLoaded(id))
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mutations.Add(new RadiiMutation(
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() => EnqueueLoad(id, LandblockStreamJobKind.LoadFar)));
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_pendingRadiiReconfiguration = new RadiiReconfiguration(
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nearRadius,
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farRadius,
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rebuilt,
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mutations);
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AdvanceRadiiReconfiguration();
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}
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/// <summary>
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/// Compatibility constructor for deterministic tests and callers that do
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/// not own an asynchronous worker. Production must use the generation-aware
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/// overload above so hard-recenter results can be rejected by incarnation.
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/// </summary>
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internal StreamingController(
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Action<uint, LandblockStreamJobKind> enqueueLoad,
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Action<uint> enqueueUnload,
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Func<int, IReadOnlyList<LandblockStreamResult>> drainCompletions,
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Action<LandblockBuild, LandblockMeshData> applyTerrain,
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GpuWorldState state,
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int nearRadius,
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int farRadius,
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Action<uint>? removeTerrain = null,
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Action<uint>? demoteNearLayer = null,
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Action? clearPendingLoads = null,
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Action<uint>? onLandblockLoaded = null,
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Action<EnvCellLandblockBuild>? ensureEnvCellMeshes = null,
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LandblockRetirementCoordinator? retirementCoordinator = null)
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: this(
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(id, kind, _) => enqueueLoad(id, kind),
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(id, _) => enqueueUnload(id),
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drainCompletions,
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applyTerrain,
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state,
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nearRadius,
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farRadius,
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removeTerrain,
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demoteNearLayer,
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clearPendingLoads,
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onLandblockLoaded,
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ensureEnvCellMeshes,
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retirementCoordinator)
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{
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}
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private void EnqueueLoad(uint id, LandblockStreamJobKind kind) =>
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_enqueueLoad(id, kind, _generation);
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private void EnqueueUnload(uint id) => _enqueueUnload(id, _generation);
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private void DemoteLandblock(uint id)
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{
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uint canonical = (id & 0xFFFF0000u) | 0xFFFFu;
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_presentation.BeginNearLayerRetirement(canonical);
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}
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private void AdvanceGeneration()
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{
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ConvergePendingPublications();
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_generation = unchecked(_generation + 1);
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}
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private void ConvergePendingPublications()
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{
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IReadOnlyList<LandblockStreamResult> pending =
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_presentation.GetPendingPublicationResults();
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if (pending.Count == 0)
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return;
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try
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{
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for (int i = 0; i < pending.Count; i++)
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_presentation.ResumePublication(pending[i]);
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}
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finally
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{
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// A completed staged result can still be present in the deferred
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// FIFO that originally retained it. Remove only those exact
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// objects; unrelated accepted completions keep their order.
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_deferredApply.RemoveAll(result =>
|
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{
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for (int i = 0; i < pending.Count; i++)
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{
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if (ReferenceEquals(result, pending[i]))
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return !_presentation.HasPendingPublication(result);
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}
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return false;
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});
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}
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}
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/// <summary>
|
||
/// Advance one frame. <paramref name="observerCx"/>/<paramref name="observerCy"/>
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/// are landblock coordinates (0..255) of the current viewer — the camera
|
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/// in offline mode, the server-sent player position in live.
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///
|
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/// <para>Two-tier model (Phase A.5 T13):</para>
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/// <list type="bullet">
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/// <item><see cref="TwoTierDiff.ToLoadFar"/> → enqueue LoadFar (terrain only, no entities)</item>
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/// <item><see cref="TwoTierDiff.ToLoadNear"/> → enqueue LoadNear (terrain + entities)</item>
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/// <item><see cref="TwoTierDiff.ToPromote"/> → enqueue PromoteToNear (entity layer for already-loaded terrain)</item>
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/// <item><see cref="TwoTierDiff.ToDemote"/> → drop entities on render thread immediately (terrain stays)</item>
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/// <item><see cref="TwoTierDiff.ToUnload"/> → enqueue full unload</item>
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/// </list>
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/// </summary>
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public void Tick(int observerCx, int observerCy, bool insideDungeon = false)
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{
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if (_originRecenterRetirement is not null)
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{
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_presentation.AdvanceRetirements();
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return;
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}
|
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|
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if (_pendingRadiiReconfiguration is not null)
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AdvanceRadiiReconfiguration();
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else if (_deferredRadiiRequest is { } deferred)
|
||
{
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_deferredRadiiRequest = null;
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ReconfigureRadii(deferred.NearRadius, deferred.FarRadius);
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}
|
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// Presentation-owner failures never roll back spatial state. Resume
|
||
// unfinished owner ledgers before accepting replacement publications.
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||
_presentation.AdvanceRetirements();
|
||
// Complete an admitted publication before this frame can mutate its
|
||
// desired tier or spatial residence. A later recenter may then demote
|
||
// or retire the fully known owner set through the normal ledger.
|
||
ConvergePendingPublications();
|
||
|
||
uint centerId = StreamingRegion.EncodeLandblockId(observerCx, observerCy);
|
||
|
||
if (_collapsed)
|
||
{
|
||
// Hysteresis. Cases:
|
||
// - Still in the SAME dungeon landblock → hold (sweep stragglers).
|
||
// - In a DIFFERENT dungeon cell (multi-landblock dungeon / new dungeon)
|
||
// → re-collapse onto it.
|
||
// - CurrCell flickered null but the player hasn't gone anywhere: the
|
||
// observer landblock reverts to the position-derived value, which for a
|
||
// dungeon is only ever the ADJACENT off-by-one landblock (negative cell-
|
||
// local Y). Hold — never expand on an adjacent flicker.
|
||
// - Genuinely left to a DISTANT landblock (portal/teleport out, always far
|
||
// from the ocean-grid dungeon block) → expand.
|
||
if (insideDungeon && centerId != _collapsedCenter)
|
||
EnterDungeonCollapse(observerCx, observerCy, centerId);
|
||
else if (!insideDungeon && ChebyshevLandblocks(centerId, _collapsedCenter) > 1)
|
||
ExitDungeonExpand(observerCx, observerCy);
|
||
else
|
||
SweepCollapsed();
|
||
}
|
||
else if (insideDungeon)
|
||
{
|
||
EnterDungeonCollapse(observerCx, observerCy, centerId);
|
||
}
|
||
else
|
||
{
|
||
NormalTick(observerCx, observerCy);
|
||
}
|
||
|
||
DrainAndApply();
|
||
}
|
||
|
||
private void AdvanceRadiiReconfiguration()
|
||
{
|
||
if (_advancingRadiiReconfiguration)
|
||
return;
|
||
|
||
RadiiReconfiguration pending = _pendingRadiiReconfiguration
|
||
?? throw new InvalidOperationException("No radii reconfiguration is pending.");
|
||
var failures = new List<Exception>();
|
||
_advancingRadiiReconfiguration = true;
|
||
try
|
||
{
|
||
|
||
if (!pending.GenerationAdvanced)
|
||
{
|
||
AdvanceGeneration();
|
||
pending.GenerationAdvanced = true;
|
||
}
|
||
|
||
if (!pending.PendingLoadsCleared)
|
||
{
|
||
try
|
||
{
|
||
_clearPendingLoads?.Invoke();
|
||
pending.PendingLoadsCleared = true;
|
||
}
|
||
catch (Exception error)
|
||
{
|
||
if (error is StreamingMutationException { MutationCommitted: true })
|
||
pending.PendingLoadsCleared = true;
|
||
failures.Add(error);
|
||
}
|
||
}
|
||
|
||
// Do not admit new-generation work until cancellation of the old
|
||
// inbox is durable. Otherwise a successful retry of ClearPendingLoads
|
||
// would also erase mutations already marked complete by this ledger.
|
||
for (int i = 0; pending.PendingLoadsCleared && i < pending.Mutations.Count; i++)
|
||
{
|
||
RadiiMutation mutation = pending.Mutations[i];
|
||
if (mutation.Completed)
|
||
continue;
|
||
try
|
||
{
|
||
mutation.Apply();
|
||
mutation.Completed = true;
|
||
}
|
||
catch (Exception error)
|
||
{
|
||
if (error is StreamingMutationException { MutationCommitted: true })
|
||
mutation.Completed = true;
|
||
failures.Add(error);
|
||
}
|
||
}
|
||
|
||
bool converged = pending.PendingLoadsCleared
|
||
&& pending.Mutations.All(static mutation => mutation.Completed);
|
||
if (converged)
|
||
{
|
||
// Publish the new logical window only after every queue/retirement
|
||
// admission is durable. A later Tick can now trust Resident as the
|
||
// complete desired set and will never strand a hole.
|
||
pending.Region.MarkResidentFromBootstrap();
|
||
_region = pending.Region;
|
||
NearRadius = pending.NearRadius;
|
||
FarRadius = pending.FarRadius;
|
||
_deferredApply.Clear();
|
||
_pendingRadiiReconfiguration = null;
|
||
}
|
||
}
|
||
finally
|
||
{
|
||
_advancingRadiiReconfiguration = false;
|
||
}
|
||
|
||
if (failures.Count != 0)
|
||
{
|
||
throw new AggregateException(
|
||
"Streaming quality reconfiguration did not complete cleanly.",
|
||
failures);
|
||
}
|
||
|
||
if (_pendingRadiiReconfiguration is null
|
||
&& _deferredRadiiRequest is { } deferred)
|
||
{
|
||
_deferredRadiiRequest = null;
|
||
ReconfigureRadii(deferred.NearRadius, deferred.FarRadius);
|
||
}
|
||
}
|
||
|
||
private sealed class RadiiReconfiguration
|
||
{
|
||
public RadiiReconfiguration(
|
||
int nearRadius,
|
||
int farRadius,
|
||
StreamingRegion region,
|
||
List<RadiiMutation> mutations)
|
||
{
|
||
NearRadius = nearRadius;
|
||
FarRadius = farRadius;
|
||
Region = region;
|
||
Mutations = mutations;
|
||
}
|
||
|
||
public int NearRadius { get; }
|
||
public int FarRadius { get; }
|
||
public StreamingRegion Region { get; }
|
||
public List<RadiiMutation> Mutations { get; }
|
||
public bool GenerationAdvanced { get; set; }
|
||
public bool PendingLoadsCleared { get; set; }
|
||
}
|
||
|
||
private sealed class RadiiMutation
|
||
{
|
||
public RadiiMutation(Action apply) => Apply = apply;
|
||
|
||
public Action Apply { get; }
|
||
public bool Completed { get; set; }
|
||
}
|
||
|
||
/// <summary>
|
||
/// #135: collapse to a single dungeon landblock IMMEDIATELY, before the first
|
||
/// <see cref="Tick"/> has a chance to bootstrap the full 25×25 window. Called
|
||
/// from the login / teleport spawn path the instant the streaming center is
|
||
/// recentered onto a SEALED dungeon landblock.
|
||
///
|
||
/// <para>The per-frame <c>insideDungeon</c> gate keys on the physics
|
||
/// <c>CurrCell</c>, which is only set once the player is PLACED — and placement
|
||
/// waits for the dungeon landblock to hydrate. So for the whole hydration window
|
||
/// (tens of seconds for a ~200-cell dungeon) the gate reads false and
|
||
/// <see cref="NormalTick"/> would enqueue the ~24 unrelated ocean-grid neighbor
|
||
/// dungeons (+ ~19k entities each); the collapse then only mops them up after
|
||
/// placement. That mop-up is the 10→high FPS ramp users see at a dungeon login.</para>
|
||
///
|
||
/// <para>Pre-collapsing means the EXPENSIVE dungeon-neighbour window is never
|
||
/// enqueued. On teleport nothing is enqueued at all (this fires before the next
|
||
/// Tick recenters). On login a brief Holtburg outdoor window may be enqueued by the
|
||
/// frame-1 NormalTick (before the player's spawn arrives) and is immediately
|
||
/// cancelled by <c>_clearPendingLoads</c> here — cheap outdoor terrain, not the
|
||
/// ocean-grid dungeons, and a handful of already-dequeued loads get swept next
|
||
/// frame. Idempotent: a no-op when already collapsed onto this same landblock, so a
|
||
/// re-sent spawn or a same-frame double call costs nothing. Render-thread only,
|
||
/// same as <see cref="Tick"/>.</para>
|
||
/// </summary>
|
||
public void InitializeKnownLoginCenter(int cx, int cy, bool isSealedDungeon)
|
||
{
|
||
// StreamingReadinessGate keeps the worker stopped until the player's
|
||
// real spawn supplies this center. There is therefore no guessed-center
|
||
// window to force-reload here. A sealed dungeon is the one special case:
|
||
// pin radius zero before the first Tick so no ocean-grid neighbours are
|
||
// ever enqueued.
|
||
if (isSealedDungeon)
|
||
PreCollapseToDungeon(cx, cy);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Pins streaming to a sealed dungeon before the first normal Tick.
|
||
/// </summary>
|
||
public void PreCollapseToDungeon(int cx, int cy)
|
||
{
|
||
uint centerId = StreamingRegion.EncodeLandblockId(cx, cy);
|
||
if (_collapsed && _collapsedCenter == centerId) return;
|
||
EnterDungeonCollapse(cx, cy, centerId);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Outdoor / building-interior streaming — the original two-tier model.
|
||
/// </summary>
|
||
private void NormalTick(int observerCx, int observerCy)
|
||
{
|
||
if (_region is null)
|
||
{
|
||
_region = new StreamingRegion(observerCx, observerCy, NearRadius, FarRadius);
|
||
var bootstrap = _region.ComputeFirstTickDiff();
|
||
foreach (var id in bootstrap.ToLoadNear) EnqueueLoad(id, LandblockStreamJobKind.LoadNear);
|
||
foreach (var id in bootstrap.ToLoadFar) EnqueueLoad(id, LandblockStreamJobKind.LoadFar);
|
||
_region.MarkResidentFromBootstrap();
|
||
}
|
||
else if (_region.CenterX != observerCx || _region.CenterY != observerCy)
|
||
{
|
||
var diff = _region.RecenterTo(observerCx, observerCy);
|
||
foreach (var id in diff.ToPromote) EnqueueLoad(id, LandblockStreamJobKind.PromoteToNear);
|
||
foreach (var id in diff.ToLoadNear) EnqueueLoad(id, LandblockStreamJobKind.LoadNear);
|
||
foreach (var id in diff.ToLoadFar) EnqueueLoad(id, LandblockStreamJobKind.LoadFar);
|
||
foreach (var id in diff.ToDemote) DemoteLandblock(id);
|
||
foreach (var id in diff.ToUnload) EnqueueUnload(id);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// Dungeon-entry edge: cancel the in-flight window load, unload every
|
||
/// resident neighbor, and pin streaming to the player's single dungeon
|
||
/// landblock. Retail-faithful — AC dungeons have no adjacent landblocks
|
||
/// (ACE <c>LandblockManager.GetAdjacentIDs</c> returns empty for a dungeon);
|
||
/// the 25×25 window was pulling in ~129 unrelated ocean-grid dungeons and
|
||
/// their thousands of emitters (#133 FPS). Unloading them also tears down
|
||
/// their lights, shrinking the static-light set toward retail's ≤40.
|
||
/// </summary>
|
||
private void EnterDungeonCollapse(int cx, int cy, uint centerId)
|
||
{
|
||
bool logTransition = !_collapsed || _collapsedCenter != centerId;
|
||
if (logTransition)
|
||
Console.WriteLine($"streaming: dungeon collapse -> 0x{centerId:X8}");
|
||
AdvanceGeneration();
|
||
_collapsed = true;
|
||
_collapsedCenter = centerId;
|
||
_clearPendingLoads?.Invoke();
|
||
_deferredApply.Clear();
|
||
_region = null;
|
||
|
||
foreach (var id in _state.LoadedLandblockIds)
|
||
if (id != centerId) EnqueueUnload(id);
|
||
|
||
// Pin a radius-0 region so RecenterTo never re-expands while inside,
|
||
// and so the post-exit rebuild starts from a clean, consistent state.
|
||
_region = new StreamingRegion(cx, cy, 0, 0);
|
||
_region.MarkResidentFromBootstrap();
|
||
|
||
// The dungeon landblock itself must be (or become) loaded. If a prior
|
||
// ClearPendingLoads cancelled its queued load, re-enqueue it.
|
||
if (!_state.IsLoaded(centerId))
|
||
EnqueueLoad(centerId, LandblockStreamJobKind.LoadNear);
|
||
else if (!_state.IsNearTier(centerId))
|
||
EnqueueLoad(centerId, LandblockStreamJobKind.PromoteToNear);
|
||
}
|
||
|
||
/// <summary>
|
||
/// While collapsed, unload any landblock that finished loading after the
|
||
/// collapse edge — a Load the worker had already dequeued before the
|
||
/// <see cref="LandblockStreamer.ClearPendingLoads"/> control job took
|
||
/// effect. At steady state only the dungeon landblock is resident, so this
|
||
/// is a no-op.
|
||
/// </summary>
|
||
private void SweepCollapsed()
|
||
{
|
||
// Always preserve the true dungeon landblock (_collapsedCenter), never the
|
||
// per-frame observer landblock — a CurrCell flicker must not unload the dungeon.
|
||
foreach (var id in _state.LoadedLandblockIds)
|
||
if (id != _collapsedCenter) EnqueueUnload(id);
|
||
}
|
||
|
||
/// <summary>Chebyshev distance in landblock cells between two landblock ids.</summary>
|
||
private static int ChebyshevLandblocks(uint a, uint b)
|
||
{
|
||
int ax = (int)((a >> 24) & 0xFFu), ay = (int)((a >> 16) & 0xFFu);
|
||
int bx = (int)((b >> 24) & 0xFFu), by = (int)((b >> 16) & 0xFFu);
|
||
return Math.Max(Math.Abs(ax - bx), Math.Abs(ay - by));
|
||
}
|
||
|
||
/// <summary>
|
||
/// True when <paramref name="id"/> is the priority center or within
|
||
/// <see cref="PriorityRadius"/> landblocks of it (Chebyshev) — i.e. inside the teleport
|
||
/// near ring that <see cref="DrainAndApply"/> eager-applies. With the default radius 0
|
||
/// this reduces to an exact match on <see cref="PriorityLandblockId"/> (the original
|
||
/// single-landblock priority behaviour).
|
||
/// </summary>
|
||
private bool IsWithinPriorityRing(uint id)
|
||
=> PriorityLandblockId != 0u
|
||
&& ChebyshevLandblocks(id, PriorityLandblockId) <= PriorityRadius;
|
||
|
||
/// <summary>
|
||
/// Dungeon-exit edge (portal to outdoors / teleport): rebuild the full
|
||
/// two-tier window at the new center and unload anything resident from the
|
||
/// collapsed state that falls outside it.
|
||
/// </summary>
|
||
private void ExitDungeonExpand(int observerCx, int observerCy)
|
||
{
|
||
Console.WriteLine(
|
||
$"streaming: dungeon EXIT-expand -> ({observerCx},{observerCy}) " +
|
||
$"(was collapsed on 0x{_collapsedCenter:X8})");
|
||
AdvanceGeneration();
|
||
_collapsed = false;
|
||
var rebuilt = new StreamingRegion(observerCx, observerCy, NearRadius, FarRadius);
|
||
|
||
foreach (var id in _state.LoadedLandblockIds)
|
||
if (!rebuilt.Resident.Contains(id)) EnqueueUnload(id);
|
||
|
||
var boot = rebuilt.ComputeFirstTickDiff();
|
||
foreach (var id in boot.ToLoadNear)
|
||
if (!_state.IsLoaded(id)) EnqueueLoad(id, LandblockStreamJobKind.LoadNear);
|
||
foreach (var id in boot.ToLoadFar)
|
||
if (!_state.IsLoaded(id)) EnqueueLoad(id, LandblockStreamJobKind.LoadFar);
|
||
rebuilt.MarkResidentFromBootstrap();
|
||
_region = rebuilt;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Starts a reload of the current streaming window. Logical residency is
|
||
/// detached immediately; render, physics, and static-lighting owners then
|
||
/// converge through the retained presentation-retirement ledger before
|
||
/// <see cref="NormalTick"/> bootstraps the window again.
|
||
/// Shared-origin teleports use <see cref="BeginOriginRecenter"/> instead so
|
||
/// every old-window owner retires while the old coordinate frame is active.
|
||
/// </summary>
|
||
public void ForceReloadWindow()
|
||
{
|
||
BeginFullWindowRetirement();
|
||
}
|
||
|
||
/// <summary>
|
||
/// Starts the old-window half of a shared-origin recenter. All accepted
|
||
/// worker work is invalidated and every resident landblock is detached
|
||
/// through the retryable presentation ledger while the old coordinate
|
||
/// frame is still active. <see cref="Tick"/> remains blocked until
|
||
/// <see cref="TryCommitOriginRecenter"/> succeeds.
|
||
/// </summary>
|
||
internal void BeginOriginRecenter()
|
||
{
|
||
_originRecenterRetirement ??= new OriginRecenterRetirement();
|
||
}
|
||
|
||
/// <summary>
|
||
/// Advances every retained old-window teardown and reports whether the
|
||
/// composition root may safely change the shared world origin.
|
||
/// </summary>
|
||
internal bool IsOriginRecenterRetirementComplete()
|
||
{
|
||
if (_originRecenterRetirement is null)
|
||
throw new InvalidOperationException(
|
||
"No streaming-origin recenter transaction is pending.");
|
||
|
||
if (!TryAdvanceOriginRecenterPreparation())
|
||
return false;
|
||
_presentation.AdvanceRetirements();
|
||
return _presentation.PendingRetirementCount == 0;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Releases the streaming bootstrap gate after the composition root has
|
||
/// committed the new shared origin. No old-window presentation owner may
|
||
/// still be pending at this edge.
|
||
/// </summary>
|
||
internal bool TryCommitOriginRecenter(
|
||
int destinationX,
|
||
int destinationY,
|
||
bool isSealedDungeon)
|
||
{
|
||
if (_advancingOriginRecenter)
|
||
return false;
|
||
|
||
_advancingOriginRecenter = true;
|
||
try
|
||
{
|
||
return TryCommitOriginRecenterCore(
|
||
destinationX,
|
||
destinationY,
|
||
isSealedDungeon);
|
||
}
|
||
finally
|
||
{
|
||
_advancingOriginRecenter = false;
|
||
}
|
||
}
|
||
|
||
private bool TryCommitOriginRecenterCore(
|
||
int destinationX,
|
||
int destinationY,
|
||
bool isSealedDungeon)
|
||
{
|
||
OriginRecenterRetirement transaction = _originRecenterRetirement
|
||
?? throw new InvalidOperationException(
|
||
"No streaming-origin recenter transaction is pending.");
|
||
if (!transaction.PreparationCommitted)
|
||
throw new InvalidOperationException(
|
||
"Streaming-origin retirement preparation has not completed.");
|
||
if (_presentation.PendingRetirementCount != 0)
|
||
throw new InvalidOperationException(
|
||
"The streaming origin cannot change while old-window presentation retirement is pending.");
|
||
|
||
var destination = (destinationX, destinationY, isSealedDungeon);
|
||
if (transaction.Destination is { } retained && retained != destination)
|
||
{
|
||
throw new InvalidOperationException(
|
||
"A recenter transaction cannot commit two different destinations.");
|
||
}
|
||
transaction.Destination ??= destination;
|
||
|
||
if (!transaction.DestinationConfigured)
|
||
{
|
||
_collapsed = isSealedDungeon;
|
||
_collapsedCenter = isSealedDungeon
|
||
? StreamingRegion.EncodeLandblockId(destinationX, destinationY)
|
||
: 0u;
|
||
if (isSealedDungeon)
|
||
{
|
||
_region = new StreamingRegion(
|
||
destinationX,
|
||
destinationY,
|
||
nearRadius: 0,
|
||
farRadius: 0);
|
||
_region.MarkResidentFromBootstrap();
|
||
}
|
||
else
|
||
{
|
||
_region = null;
|
||
}
|
||
transaction.DestinationConfigured = true;
|
||
}
|
||
|
||
if (isSealedDungeon && !transaction.DestinationLoadEnqueued)
|
||
{
|
||
try
|
||
{
|
||
EnqueueLoad(
|
||
StreamingRegion.EncodeLandblockId(destinationX, destinationY),
|
||
LandblockStreamJobKind.LoadNear);
|
||
transaction.DestinationLoadEnqueued = true;
|
||
}
|
||
catch (StreamingMutationException error) when (error.MutationCommitted)
|
||
{
|
||
transaction.DestinationLoadEnqueued = true;
|
||
Console.WriteLine(
|
||
$"streaming: committed dungeon recenter enqueue reported failure: {error}");
|
||
return false;
|
||
}
|
||
catch (Exception error)
|
||
{
|
||
Console.WriteLine(
|
||
$"streaming: dungeon recenter enqueue will resume: {error}");
|
||
return false;
|
||
}
|
||
}
|
||
|
||
_originRecenterRetirement = null;
|
||
return true;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Releases a fully retired origin transaction at a session boundary
|
||
/// without bootstrapping a destination from the ending session.
|
||
/// </summary>
|
||
internal bool TryCancelOriginRecenter()
|
||
{
|
||
if (_originRecenterRetirement is not { PreparationCommitted: true })
|
||
return false;
|
||
if (_presentation.PendingRetirementCount != 0)
|
||
return false;
|
||
|
||
_collapsed = false;
|
||
_collapsedCenter = 0u;
|
||
_region = null;
|
||
_originRecenterRetirement = null;
|
||
return true;
|
||
}
|
||
|
||
private bool TryAdvanceOriginRecenterPreparation()
|
||
{
|
||
OriginRecenterRetirement transaction = _originRecenterRetirement
|
||
?? throw new InvalidOperationException(
|
||
"No streaming-origin recenter transaction is pending.");
|
||
if (transaction.PreparationCommitted)
|
||
return true;
|
||
if (_advancingOriginRecenter)
|
||
return false;
|
||
|
||
_advancingOriginRecenter = true;
|
||
try
|
||
{
|
||
if (!transaction.RadiiConverged)
|
||
{
|
||
if (_pendingRadiiReconfiguration is not null)
|
||
AdvanceRadiiReconfiguration();
|
||
if (_pendingRadiiReconfiguration is not null)
|
||
return false;
|
||
transaction.RadiiConverged = true;
|
||
}
|
||
if (!transaction.GenerationAdvanced)
|
||
{
|
||
AdvanceGeneration();
|
||
transaction.GenerationAdvanced = true;
|
||
}
|
||
if (!transaction.PendingLoadsCleared)
|
||
{
|
||
try
|
||
{
|
||
_clearPendingLoads?.Invoke();
|
||
transaction.PendingLoadsCleared = true;
|
||
}
|
||
catch (StreamingMutationException error) when (error.MutationCommitted)
|
||
{
|
||
transaction.PendingLoadsCleared = true;
|
||
Console.WriteLine(
|
||
$"streaming: committed pending-load clear reported failure: {error}");
|
||
return false;
|
||
}
|
||
}
|
||
if (!transaction.DeferredApplyCleared)
|
||
{
|
||
_deferredApply.Clear();
|
||
transaction.DeferredApplyCleared = true;
|
||
}
|
||
if (!transaction.RegionCleared)
|
||
{
|
||
_collapsed = false;
|
||
_region = null;
|
||
transaction.RegionCleared = true;
|
||
}
|
||
if (transaction.ResidentIds is null)
|
||
{
|
||
transaction.ResidentIds = new List<uint>(_state.LoadedLandblockIds);
|
||
FullWindowRetirementCount++;
|
||
LastFullWindowRetirementLandblockCount = transaction.ResidentIds.Count;
|
||
}
|
||
|
||
while (transaction.RetirementCursor < transaction.ResidentIds.Count)
|
||
{
|
||
uint id = transaction.ResidentIds[transaction.RetirementCursor];
|
||
try
|
||
{
|
||
_presentation.BeginFullRetirement(id);
|
||
transaction.RetirementCursor++;
|
||
}
|
||
catch (Exception error)
|
||
{
|
||
// A delivered visibility-observer failure may surface after
|
||
// detachment has committed. Advance that exact cursor only
|
||
// when world state proves the old resident is unreachable;
|
||
// otherwise retain it for the next frame.
|
||
if (!_state.IsLoaded(id))
|
||
transaction.RetirementCursor++;
|
||
Console.WriteLine(
|
||
$"streaming: origin-recenter retirement for 0x{id:X8} " +
|
||
$"will resume: {error}");
|
||
return false;
|
||
}
|
||
}
|
||
|
||
transaction.PreparationCommitted = true;
|
||
return true;
|
||
}
|
||
catch (Exception error)
|
||
{
|
||
Console.WriteLine(
|
||
$"streaming: origin-recenter preparation will resume: {error}");
|
||
return false;
|
||
}
|
||
finally
|
||
{
|
||
_advancingOriginRecenter = false;
|
||
}
|
||
}
|
||
|
||
private void BeginFullWindowRetirement()
|
||
{
|
||
AdvanceGeneration();
|
||
_collapsed = false;
|
||
_clearPendingLoads?.Invoke();
|
||
_deferredApply.Clear();
|
||
// Commit the old region boundary before any presentation owner is
|
||
// advanced. New same-id publications are fenced by the presentation
|
||
// pipeline's retryable retirement ledger.
|
||
_region = null;
|
||
// Snapshot — RemoveLandblock mutates the loaded set we're iterating.
|
||
var ids = new List<uint>(_state.LoadedLandblockIds);
|
||
FullWindowRetirementCount++; // [FRAME-DIAG] churn counter
|
||
LastFullWindowRetirementLandblockCount = ids.Count; // upcoming re-upload volume
|
||
foreach (var id in ids)
|
||
_presentation.BeginFullRetirement(id);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Apply streamed completions for this frame. LOADS (terrain mesh GPU uploads) are the
|
||
/// expensive part, so they are metered at <see cref="MaxCompletionsPerFrame"/> to avoid a
|
||
/// GPU-upload spike; the overflow buffers in <see cref="_deferredApply"/> and drains over
|
||
/// subsequent frames. UNLOADS are cheap (they free GPU buffers — no upload) and are applied
|
||
/// IMMEDIATELY, never throttled: a teleport produces a whole window of unloads (~600), and
|
||
/// metering them at the load rate left the previous location's terrain resident for seconds
|
||
/// (rendering at its old world position as "floating terrain at the horizon"), and rapid
|
||
/// hops accumulated them faster than they cleared — a runaway resident count (951 observed
|
||
/// vs a 625 window) that also dragged FPS. Loads inside the teleport near ring
|
||
/// (<see cref="PriorityRadius"/>, applied during portal travel) likewise bypass the budget so the
|
||
/// player materialises in a loaded world.
|
||
/// </summary>
|
||
private void DrainAndApply()
|
||
{
|
||
// --- Step 1: drain the outbox in bounded chunks. Apply unloads + priority near-ring
|
||
// loads immediately; defer every other (budget-metered) load. Draining the whole
|
||
// outbox each frame (bounded by MaxDrainIterations) is what lets unloads flush
|
||
// promptly regardless of the load backlog — the throttle is on GPU UPLOADS, not on
|
||
// freeing them. The drain cap must NOT be gated behind the per-frame load budget
|
||
// (the prior version returned once the budget hit 0, stranding the outbox).
|
||
const int MaxDrainIterations = 64; // cap at 64 * MaxCompletionsPerFrame drained/frame
|
||
int iter = 0;
|
||
while (iter++ < MaxDrainIterations)
|
||
{
|
||
var chunk = _drainCompletions(MaxCompletionsPerFrame);
|
||
if (chunk.Count == 0) break;
|
||
for (int chunkIndex = 0; chunkIndex < chunk.Count; chunkIndex++)
|
||
{
|
||
LandblockStreamResult result = chunk[chunkIndex];
|
||
// Reject obsolete hard-window work before it can occupy the
|
||
// metered deferred queue. ApplyResult repeats this invariant
|
||
// for direct callers and future drain paths.
|
||
if (IsStaleGeneration(result)
|
||
&& !_presentation.HasPendingPublication(result))
|
||
continue;
|
||
if (IsPublicationBlockedByRetirement(result))
|
||
_deferredApply.Add(result);
|
||
else if (result is LandblockStreamResult.Unloaded
|
||
|| IsWithinPriorityRing(ResultLandblockId(result)))
|
||
{
|
||
try
|
||
{
|
||
ApplyResult(result); // free (unload) or behind-the-fade near ring
|
||
}
|
||
catch
|
||
{
|
||
// The concrete presentation pipeline retains the exact
|
||
// unfinished stage. Preserve it and every untouched
|
||
// completion from this already-drained chunk in
|
||
// original FIFO order. Internal compatibility tests may
|
||
// use a callback pipeline that cannot retain a receipt;
|
||
// its failed result is consumed, but the untouched
|
||
// suffix must still survive.
|
||
if (_presentation.HasPendingPublication(result))
|
||
_deferredApply.Add(result);
|
||
for (int suffix = chunkIndex + 1; suffix < chunk.Count; suffix++)
|
||
_deferredApply.Add(chunk[suffix]);
|
||
throw;
|
||
}
|
||
}
|
||
else
|
||
_deferredApply.Add(result); // a GPU-upload load — meter it in step 2
|
||
}
|
||
}
|
||
|
||
// --- Step 2: apply the deferred LOAD backlog at the per-frame budget (FIFO, so
|
||
// earlier-queued landblocks win). Caps GPU upload per frame so a big diff doesn't
|
||
// spike. _deferredApply now only ever holds loads — unloads were applied in step 1.
|
||
int budget = MaxCompletionsPerFrame;
|
||
int applied = 0;
|
||
int read = 0;
|
||
int write = 0;
|
||
try
|
||
{
|
||
while (applied < budget && read < _deferredApply.Count)
|
||
{
|
||
LandblockStreamResult result = _deferredApply[read];
|
||
if (IsPublicationBlockedByRetirement(result))
|
||
{
|
||
if (write != read)
|
||
_deferredApply[write] = result;
|
||
write++;
|
||
read++;
|
||
continue;
|
||
}
|
||
|
||
// Advance read only after the apply commits. If it throws, the
|
||
// finally block removes prior committed entries but retains this
|
||
// exact result and the untouched tail for retry.
|
||
try
|
||
{
|
||
ApplyResult(result);
|
||
read++;
|
||
applied++;
|
||
}
|
||
catch
|
||
{
|
||
// A concrete suffix-stage failure keeps its pipeline
|
||
// receipt and must remain at this exact FIFO position. The
|
||
// internal compatibility callback cannot report its exact
|
||
// committed prefix and therefore removes its receipt;
|
||
// consume only that failed result so a later frame cannot
|
||
// replay it automatically.
|
||
if (!_presentation.HasPendingPublication(result))
|
||
read++;
|
||
throw;
|
||
}
|
||
}
|
||
}
|
||
finally
|
||
{
|
||
// One linear tail shift replaces budget-many RemoveAt shifts. The
|
||
// retained blocked prefix and the untouched FIFO tail keep their
|
||
// original relative order.
|
||
if (read > write)
|
||
_deferredApply.RemoveRange(write, read - write);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// Apply a single <see cref="LandblockStreamResult"/> with the full side-
|
||
/// effects: terrain upload, GPU state, and the re-hydration callback.
|
||
/// Extracted from the inline switch in the original <c>DrainAndApply</c>
|
||
/// so both the priority-hunt path and the normal drain path share it.
|
||
/// </summary>
|
||
private void ApplyResult(LandblockStreamResult result)
|
||
{
|
||
if (_presentation.HasPendingPublication(result))
|
||
{
|
||
_presentation.ResumePublication(result);
|
||
ReconcileCompletedPendingPublication(result.LandblockId);
|
||
return;
|
||
}
|
||
|
||
if (IsStaleGeneration(result))
|
||
{
|
||
// A worker can finish one old load/unload after a hard recenter.
|
||
// Landblock id membership cannot distinguish overlapping windows;
|
||
// generation is the logical streaming incarnation boundary.
|
||
return;
|
||
}
|
||
|
||
if (result is LandblockStreamResult.Unloaded
|
||
&& _region?.TryGetDesiredTier(result.LandblockId, out _) == true)
|
||
{
|
||
// Normal recenter does not advance the hard-window generation. A
|
||
// rapid away->back can therefore re-own an id while its same-
|
||
// generation unload is already in the worker outbox. Current
|
||
// region ownership wins; the old unload must not tear it down.
|
||
return;
|
||
}
|
||
|
||
if (result is LandblockStreamResult.Loaded
|
||
or LandblockStreamResult.Promoted)
|
||
{
|
||
if (_region is null
|
||
|| !_region.TryGetDesiredTier(result.LandblockId, out var desiredTier))
|
||
{
|
||
// A hard recenter/collapse can leave one worker job already in
|
||
// flight. Its completion belongs to the old region and must not
|
||
// resurrect a landblock the new StreamingRegion never owns.
|
||
return;
|
||
}
|
||
|
||
bool isNearCompletion = result is LandblockStreamResult.Promoted
|
||
or LandblockStreamResult.Loaded { Tier: LandblockStreamTier.Near };
|
||
if (isNearCompletion
|
||
&& _state.IsNearTier(result.LandblockId)
|
||
&& !_presentation.HasPendingPublication(result))
|
||
{
|
||
// Normal recenter can enqueue a second high-priority Near job
|
||
// while an earlier one is already in flight. The streamer
|
||
// supersedes Far/Unload work but intentionally does not dedupe
|
||
// high-priority jobs. Publication is idempotent at this owner:
|
||
// never append statics, replay defaults, or reapply the complete
|
||
// Near transaction to an already-Near landblock.
|
||
return;
|
||
}
|
||
if (desiredTier == LandblockStreamTier.Far && isNearCompletion)
|
||
{
|
||
// Recenter can demote a Near job before its first completion.
|
||
// StreamingRegion already considers that landblock Far, so it
|
||
// deliberately emits no second LoadFar job. If no terrain is
|
||
// resident yet, publish the completed heightmap/mesh as a Far
|
||
// result while discarding its entity and EnvCell layers. This
|
||
// is the same payload a fresh LoadFar would have produced and
|
||
// closes the in-flight Near -> desired Far lifecycle without a
|
||
// duplicate worker read or a permanent terrain hole.
|
||
if (!_state.IsLoaded(result.LandblockId))
|
||
{
|
||
switch (result)
|
||
{
|
||
case LandblockStreamResult.Loaded loaded:
|
||
_presentation.PublishAsFar(loaded, loaded.Build, loaded.MeshData);
|
||
break;
|
||
case LandblockStreamResult.Promoted promoted:
|
||
_presentation.PublishAsFar(promoted, promoted.Build, promoted.MeshData);
|
||
break;
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
|
||
switch (result)
|
||
{
|
||
case LandblockStreamResult.Loaded loaded:
|
||
if (loaded.Tier == LandblockStreamTier.Far
|
||
&& _state.IsNearTier(loaded.LandblockId))
|
||
{
|
||
// This Far completion was queued before a newer Near load
|
||
// or promotion. Applying it would erase the entity/cell
|
||
// layer that now owns the landblock.
|
||
break;
|
||
}
|
||
_presentation.PublishLoaded(loaded);
|
||
break;
|
||
case LandblockStreamResult.Promoted promoted:
|
||
// PromoteToNear carries a complete build and mesh because the
|
||
// streamer deliberately lets it supersede a queued LoadFar. If
|
||
// that Far job never started, publish this as the real Near
|
||
// landblock; if the base is already resident, merge only the
|
||
// Near layer so existing live projections retain identity.
|
||
_presentation.PublishPromoted(
|
||
promoted,
|
||
mergeIntoExistingLandblock: _state.IsLoaded(promoted.LandblockId));
|
||
break;
|
||
case LandblockStreamResult.Unloaded unloaded:
|
||
_presentation.BeginFullRetirement(unloaded.LandblockId);
|
||
break;
|
||
case LandblockStreamResult.Failed failed:
|
||
Console.WriteLine(
|
||
$"streaming: load failed for 0x{failed.LandblockId:X8}: {failed.Error}");
|
||
break;
|
||
case LandblockStreamResult.WorkerCrashed crashed:
|
||
Console.WriteLine(
|
||
$"streaming: worker CRASHED: {crashed.Error}");
|
||
break;
|
||
}
|
||
}
|
||
|
||
private void ReconcileCompletedPendingPublication(uint landblockId)
|
||
{
|
||
if (_region is null
|
||
|| !_region.TryGetDesiredTier(landblockId, out LandblockStreamTier desiredTier))
|
||
{
|
||
if (_state.IsLoaded(landblockId))
|
||
_presentation.BeginFullRetirement(landblockId);
|
||
return;
|
||
}
|
||
|
||
if (desiredTier == LandblockStreamTier.Far
|
||
&& _state.IsNearTier(landblockId))
|
||
{
|
||
_presentation.BeginNearLayerRetirement(landblockId);
|
||
}
|
||
}
|
||
|
||
private bool IsStaleGeneration(LandblockStreamResult result) =>
|
||
result is not LandblockStreamResult.WorkerCrashed
|
||
&& result.Generation != _generation;
|
||
|
||
private bool IsPublicationBlockedByRetirement(LandblockStreamResult result) =>
|
||
result is LandblockStreamResult.Loaded or LandblockStreamResult.Promoted
|
||
&& _presentation.IsRetirementPending(result.LandblockId);
|
||
|
||
/// <summary>
|
||
/// Returns the landblock id associated with <paramref name="result"/>.
|
||
/// For <see cref="LandblockStreamResult.WorkerCrashed"/> this is 0 by
|
||
/// convention (not tied to a specific landblock).
|
||
/// </summary>
|
||
private static uint ResultLandblockId(LandblockStreamResult result) => result.LandblockId;
|
||
}
|