3e8d548f38
### Summary Adds spawn position caching and optimization for constrained spawners (e.g., those near houses, water, or blocked terrain). ### Key features: - Sector-based bitmap cache (32 bytes per 16x16 sector) stores valid spawn positions - Spiral scan progressively discovers positions from spawner center outward - Automatic mode detects constrained spawners after 5+ non-transient failures - Prevents mob spawning inside private houses (allows public AoS buildings) - Deduplicates sector lookups for multi-bounds spawners (RegionSpawner) - Cache invalidation on house placement/demolition - Moves SpawnBounds to Spawner ### New spawner properties: - SpawnPositionMode: Automatic (default), Enabled, Disabled, Abandoned - MaxSpawnAttempts: Configurable attempts before optimization engages (default: 5)
80 lines
3.3 KiB
C#
80 lines
3.3 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2025 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: SpawnPositionState.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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namespace Server.Engines.Spawners;
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/// <summary>
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/// Runtime state for spawn position optimization.
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/// Not serialized - resets on server restart.
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/// </summary>
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public sealed class SpawnPositionState
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{
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// Tunable thresholds for auto-detection
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private const int FailureThreshold = 5;
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private const int AbandonThreshold = 25;
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// Failure tracking for auto-detection
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private int _nonTransientFailures;
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// Abandon tracking - counts consecutive cache misses or Location-only results
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private int _consecutiveUselessResults;
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// Spiral scan state
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public int SpiralRing;
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public int SpiralRingPosition;
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public bool SpiralComplete;
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/// <summary>
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/// Resets all state. Called when spawner moves or bounds change.
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/// </summary>
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public void Reset()
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{
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_nonTransientFailures = 0;
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_consecutiveUselessResults = 0;
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SpiralRing = 0;
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SpiralRingPosition = 0;
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SpiralComplete = false;
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}
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/// <summary>
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/// Records a useful cache hit (position other than spawner's own location).
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/// Resets the abandon counter.
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/// </summary>
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public void RecordUsefulCacheHit() => _consecutiveUselessResults = 0;
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/// <summary>
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/// Records a useless result (cache miss or cache returned spawner's location).
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/// Counts toward abandonment threshold.
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/// </summary>
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public void RecordUselessResult() => _consecutiveUselessResults++;
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/// <summary>
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/// Records a non-transient spawn failure for auto-detection.
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/// </summary>
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public void RecordNonTransientFailure() => _nonTransientFailures++;
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/// <summary>
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/// Returns true if the spawner should cache successful positions.
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/// </summary>
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public bool ShouldCachePositions(SpawnPositionMode mode) =>
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mode == SpawnPositionMode.Enabled || mode == SpawnPositionMode.Automatic && _nonTransientFailures > FailureThreshold;
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/// <summary>
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/// Returns true if the spawner should be marked as abandoned.
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/// Triggers after spiral completes, and we get consecutive useless results
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/// (cache misses or cache only returning spawner's own location).
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/// </summary>
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public bool ShouldAbandon() => SpiralComplete && _consecutiveUselessResults >= AbandonThreshold;
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}
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