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b83e2abafa
Adds disk persistence for compressed HeightFields to speed up navmesh loading. Since we serialize the HeightField (not the final PolyMesh), loading still requires PolyMesh generation at runtime. This is intentional, HeightFields are needed for dynamic obstacles and areas. Small/medium maps: Baking and loading both near-instant, storage ~few MBs Very large maps (e.g. 4km × 4km): ~10s bake, ~8s load ~500mb **Baking** Serializes existing in-memory HeightField cache to disk with layered compression. **Loading** Eliminates geometry collection and HeightField generation on scene load. PolyMesh generation still runs at runtime (allows dynamic areas/links).
72 lines
2.3 KiB
C#
72 lines
2.3 KiB
C#
using System.Text.Json;
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using System.Text.Json.Nodes;
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namespace Sandbox.Navigation;
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public sealed partial class NavMesh
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{
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/// <summary>
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/// The relative path to the baked navdata file (without _c suffix)
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/// </summary>
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private string _bakedDataPath;
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/// <summary>
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/// Get the navdata filename for this scene
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/// </summary>
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private readonly string _navDataFilename = "/navmesh/baked.navdata";
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/// <summary>
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/// Data saved in a Scene file
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/// </summary>
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internal JsonObject Serialize()
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{
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JsonObject jso = new JsonObject();
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jso["Enabled"] = IsEnabled;
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jso["IncludeStaticBodies"] = IncludeStaticBodies;
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jso["IncludeKeyframedBodies"] = IncludeKeyframedBodies;
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jso["EditorAutoUpdate"] = EditorAutoUpdate;
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jso["AgentHeight"] = AgentHeight;
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jso["AgentRadius"] = AgentRadius;
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jso["AgentStepSize"] = AgentStepSize;
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jso["AgentMaxSlope"] = AgentMaxSlope;
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jso["ExcludedBodies"] = Json.ToNode( ExcludedBodies, typeof( TagSet ) );
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jso["IncludedBodies"] = Json.ToNode( IncludedBodies, typeof( TagSet ) );
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// Store reference to the baked data file as a RawFileReference
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if ( !string.IsNullOrWhiteSpace( _bakedDataPath ) )
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{
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jso["BakedDataPath"] = JsonSerializer.SerializeToNode( FileReference.FromPath( _bakedDataPath ) );
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}
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return jso;
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}
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/// <summary>
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/// Data loaded from a Scene file
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/// </summary>
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internal void Deserialize( JsonObject jso )
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{
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if ( jso is null )
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return;
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IsEnabled = (bool)(jso["Enabled"] ?? IsEnabled);
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IncludeStaticBodies = (bool)(jso["IncludeStaticBodies"] ?? IncludeStaticBodies);
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IncludeKeyframedBodies = (bool)(jso["IncludeKeyframedBodies"] ?? IncludeKeyframedBodies);
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EditorAutoUpdate = (bool)(jso["EditorAutoUpdate"] ?? EditorAutoUpdate);
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AgentHeight = (float)(jso["AgentHeight"] ?? AgentHeight);
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AgentRadius = (float)(jso["AgentRadius"] ?? AgentRadius);
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AgentStepSize = (float)(jso["AgentStepSize"] ?? AgentStepSize);
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AgentMaxSlope = (float)(jso["AgentMaxSlope"] ?? AgentMaxSlope);
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ExcludedBodies = Json.FromNode<TagSet>( jso["ExcludedBodies"] ) ?? ExcludedBodies;
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IncludedBodies = Json.FromNode<TagSet>( jso["IncludedBodies"] ) ?? IncludedBodies;
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// Load baked data path from RawFileReference
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if ( jso["BakedDataPath"] is JsonObject bakedDataObj )
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{
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_bakedDataPath = bakedDataObj["path"]?.ToString();
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}
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}
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}
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