sindoring
7b0e1eac5f
Work-Package: M03-RND-M2-MESH-RESOURCE-EXTRACTOR-001 Agent: sindo-main-codex Tests: 36 headless renderer/coordinate contracts pass; checkpoint dry-run 7/7; documentation and coordination gates pass Fidelity: preserves first-Mesh preorder and temporary PackedScene cleanup; no visual parity claim
214 lines
9.2 KiB
Markdown
214 lines
9.2 KiB
Markdown
# M2 Mesh Resource Cache State
|
|
|
|
## Metadata
|
|
|
|
| Field | Value |
|
|
|---|---|
|
|
| Status | Implemented extraction |
|
|
| Target/work package | M03 / `M03-RND-M2-MESH-RESOURCE-CACHE-001` |
|
|
| Owners | Prepared static M2 Mesh resource references by normalized path |
|
|
| Last verified | Worktree `work/sindo-main-codex/m03-m2-mesh-resource-cache`, 2026-07-17 |
|
|
| Profiles/capabilities | Existing static M2 cached and raw fallback paths |
|
|
|
|
## Purpose
|
|
|
|
Own the runtime cache of prepared static M2 `Mesh` references outside
|
|
`StreamingWorldLoader`. The loader remains responsible for finding, loading,
|
|
extracting, refreshing and materializing each Mesh.
|
|
|
|
## Non-goals
|
|
|
|
- Own the shared M2 missing-path, prototype or animated-scene caches.
|
|
- Call ResourceLoader/FileAccess or select `.tscn`/`.glb` paths.
|
|
- Extract a Mesh from a Resource or Node.
|
|
- Refresh materials, rebuild Meshes or create MultiMesh instances.
|
|
- Add eviction, persistence, cache versions or quality-profile behavior.
|
|
|
|
## Context and boundaries
|
|
|
|
```mermaid
|
|
flowchart LR
|
|
Need[Static M2 mesh lookup] --> Loader[StreamingWorldLoader]
|
|
Loader --> Cache[M2MeshResourceCacheState]
|
|
Cache -->|cached Mesh or null| Loader
|
|
Loader --> Pipeline[M2MeshLoadPipelineState]
|
|
Pipeline --> IO[ResourceLoader]
|
|
IO --> Extract[M2MeshResourceExtractor]
|
|
Extract --> Prepare[Loader runtime preparation]
|
|
Prepare --> Cache
|
|
Loader --> Build[M2 MultiMesh materialization]
|
|
```
|
|
|
|
The cache may retain `Mesh` resources and copied normalized-path Strings. It has
|
|
no Node, ResourceLoader, filesystem, worker, scheduler, missing-state, builder,
|
|
gameplay, network or editor dependency.
|
|
|
|
## Public API
|
|
|
|
| Symbol | Kind | Purpose | Thread/lifetime | Errors |
|
|
|---|---|---|---|---|
|
|
| `store_mesh(path, mesh)` | Command/query | Retain or replace one prepared Mesh | Renderer main thread; final shutdown | Empty path/null Mesh rejected |
|
|
| `has_mesh(path)` | Query | Test whether a Mesh is retained | Renderer main thread | Empty/unknown false |
|
|
| `find_mesh(path)` | Query | Borrow exact retained Mesh reference | Renderer main thread | Empty/unknown null |
|
|
| `mesh_count()` | Query | Return retained entry count | Diagnostics/tests | None |
|
|
| `normalized_paths_snapshot()` | Query | Copy insertion-order path keys | Diagnostics/tests | Never exposes Mesh references |
|
|
| `clear()` | Command | Release every retained Mesh reference | Final shutdown after async drain | Idempotent |
|
|
|
|
## Inputs and outputs
|
|
|
|
| Direction | Contract/data | Producer | Consumer | Ownership | Thread/lifetime |
|
|
|---|---|---|---|---|---|
|
|
| Input | Normalized relative M2 path | Loader normalization adapter | Cache key | Copied String | Cache lifetime |
|
|
| Input | Prepared static Mesh | Loader finalizer or synchronous fallback | Cache value | Strong reference retained | Until replacement/clear |
|
|
| Output | Borrowed exact Mesh | Cache lookup | Static M2 batch builder | Cache retains reference | One build/materialization pass |
|
|
| Output | Detached normalized paths | Cache diagnostics | Verifier/future metrics | Caller-owned Strings | Snapshot lifetime |
|
|
|
|
Store and clear mutate only the cache Dictionary and Resource reference counts.
|
|
|
|
## Data flow
|
|
|
|
```mermaid
|
|
flowchart TD
|
|
Lookup[Lookup normalized M2 path] --> Cached{Mesh cached?}
|
|
Cached -->|yes| Return[Return retained Mesh]
|
|
Cached -->|no| Missing{Shared missing state?}
|
|
Missing -->|yes| Null[Return null]
|
|
Missing -->|no| Load[Loader request or synchronous fallback]
|
|
Load --> Prepare[Loader extracts and prepares Mesh]
|
|
Prepare --> Valid{Prepared Mesh valid?}
|
|
Valid -->|yes| Store[Store or replace cache entry]
|
|
Valid -->|no| MarkMissing[Loader updates shared missing state]
|
|
Store --> Return
|
|
```
|
|
|
|
## Lifecycle/state
|
|
|
|
```mermaid
|
|
stateDiagram-v2
|
|
[*] --> Absent
|
|
Absent --> Cached: store valid Mesh
|
|
Cached --> Cached: replace Mesh reference
|
|
Cached --> Absent: final shutdown clear
|
|
```
|
|
|
|
Map/world refresh retains cached Meshes. Only the existing final runtime-cache
|
|
release clears them after asynchronous shutdown drain.
|
|
|
|
## Main sequence
|
|
|
|
```mermaid
|
|
sequenceDiagram
|
|
participant Loader as StreamingWorldLoader
|
|
participant Cache as M2MeshResourceCacheState
|
|
participant Pipeline as M2MeshLoadPipelineState
|
|
Loader->>Cache: find/has normalized path
|
|
alt cache miss
|
|
Loader->>Pipeline: request/poll/finalize record
|
|
Loader->>Loader: ResourceLoader get + extract + prepare
|
|
Loader->>Cache: store_mesh(path, prepared Mesh)
|
|
end
|
|
Cache-->>Loader: exact retained Mesh
|
|
Loader->>Loader: materialize static M2 batch
|
|
```
|
|
|
|
## Dependency diagram
|
|
|
|
```mermaid
|
|
flowchart TB
|
|
Loader[StreamingWorldLoader] --> Cache[M2MeshResourceCacheState]
|
|
Loader --> Pipeline[M2MeshLoadPipelineState]
|
|
Loader --> Classifier[M2RuntimeMeshRebuildClassifier]
|
|
Loader --> Builder[M2Builder and MultiMesh]
|
|
Cache --> Mesh[Godot Mesh Resource]
|
|
Cache -. no dependency .-> Pipeline
|
|
Cache -. no dependency .-> Classifier
|
|
Cache -. no dependency .-> Builder
|
|
```
|
|
|
|
## Ownership, threading and resources
|
|
|
|
- Renderer main-thread adapters serialize every cache operation.
|
|
- The cache owns normalized-path Strings and strong Mesh references.
|
|
- Borrowed Mesh lookups do not transfer ownership or duplicate resources.
|
|
- `M2MeshResourceExtractor` owns first-Mesh selection and temporary PackedScene
|
|
instances. The loader owns missing/prototype/animated state and MultiMeshes.
|
|
- The loader drains asynchronous work before the final cache clear.
|
|
|
|
## Errors, cancellation and recovery
|
|
|
|
| Failure/state | Detection | Behavior | Diagnostic | Recovery |
|
|
|---|---|---|---|---|
|
|
| Empty path or null Mesh | Cache guard | Reject unchanged | Contract verifier | Correct caller input |
|
|
| Unknown lookup | Membership query | Return null | Existing loader path | Request/load or missing decision |
|
|
| Replacement | Existing key | Retain new exact reference | Contract verifier | Normal subsequent lookup |
|
|
| Load/preparation failure | Loader boundary | Do not store; loader marks missing | Existing renderer behavior | Cache/source correction and reload |
|
|
| Final shutdown | Loader lifecycle | Clear releases references | Shutdown/source verifier | New loader starts empty |
|
|
|
|
## Configuration and capabilities
|
|
|
|
The module adds no setting, budget or profile branch. Cache path order,
|
|
`M2_MATERIAL_REFRESH_VERSION`, finalize permits and batching remain loader-owned.
|
|
|
|
## Persistence, cache and migration
|
|
|
|
The state is runtime-only and serializes nothing. Existing `.tscn`/`.glb`
|
|
formats, import caches and material refresh metadata are unchanged; no migration
|
|
or rebake is required.
|
|
|
|
## Diagnostics and observability
|
|
|
|
`mesh_count` and `normalized_paths_snapshot` expose scalar ownership diagnostics
|
|
without Mesh references. Existing renderer metrics/logging are unchanged because
|
|
the historical Mesh cache had no queue contribution or log site.
|
|
|
|
## Verification
|
|
|
|
- `verify_m2_mesh_resource_cache_state.gd`: invalid input, exact reference,
|
|
replacement, lookup, detached path snapshot, idempotent clear, loader source
|
|
ownership and 100-by-256 bounded timing.
|
|
- Mesh pipeline/classifier/material/shutdown/M2 build/facade regressions cover
|
|
adjacent behavior.
|
|
- Fidelity evidence is exact cache/lifetime extraction; no original-client
|
|
visual-parity or asset-backed performance claim is made.
|
|
|
|
## Extension points
|
|
|
|
- A separate M2 Mesh resource finalizer may later return a prepared Mesh for
|
|
`store_mesh` without changing cache ownership.
|
|
- Eviction requires measured memory pressure and explicit lifetime semantics.
|
|
|
|
## Capability status
|
|
|
|
| Capability | Status | Evidence | Gap/next step |
|
|
|---|---|---|---|
|
|
| Prepared static M2 Mesh cache | Implemented extraction | Contract/source/timing verifier | Asset-backed memory/leak run pending |
|
|
| M2 Mesh request lifecycle | Implemented extraction | Pipeline state verifier | ResourceLoader I/O remains loader-owned |
|
|
| M2 Mesh extraction | Implemented extraction | Resource/order/lifetime verifier | Asset-backed corrupt-scene fixture pending |
|
|
| M2 Mesh preparation | Existing loader-owned | Material/classifier regressions | Separate finalizer extraction next |
|
|
|
|
## Known gaps and risks
|
|
|
|
- Strong Mesh references intentionally remain until final shutdown.
|
|
- Shared missing state cannot move here without also redesigning prototype and
|
|
animated lookup behavior.
|
|
- No proprietary M2 traversal, leak/descriptor-pressure, p95/p99 or paired
|
|
original-client capture is included.
|
|
|
|
## Source map
|
|
|
|
| Path | Responsibility |
|
|
|---|---|
|
|
| `src/render/m2/m2_mesh_resource_cache_state.gd` | Prepared Mesh references and final clear |
|
|
| `src/render/m2/m2_mesh_resource_extractor.gd` | First-Mesh selection and temporary PackedScene lifetime |
|
|
| `src/scenes/streaming/streaming_world_loader.gd` | Normalization, I/O, preparation, missing state and materialization |
|
|
| `src/render/m2/m2_mesh_load_pipeline_state.gd` | Pending request and terminal finalize records |
|
|
| `src/tools/verify_m2_mesh_resource_cache_state.gd` | Cache ownership/lifetime/boundary/timing regression |
|
|
|
|
## Related decisions and references
|
|
|
|
- [`m2-mesh-load-pipeline-state.md`](m2-mesh-load-pipeline-state.md)
|
|
- [`m2-runtime-mesh-rebuild-classifier.md`](m2-runtime-mesh-rebuild-classifier.md)
|
|
- [`world-renderer.md`](world-renderer.md)
|
|
- [`../../RENDER.md`](../../RENDER.md)
|
|
- [`../../targets/roadmap/02-rendering-and-graphics.md`](../../targets/roadmap/02-rendering-and-graphics.md)
|