36 lines
1.7 KiB
Markdown
36 lines
1.7 KiB
Markdown
# W-073 Status
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status: in_progress
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task: 定义 Blender 三角面简化和 LOD 协议
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`web/protocol/simplify.ts` now defines versioned `SimplifyProfile`,
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`SimplifyResult` and `LODManifest` contracts. The profile validator keeps the
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Blender modifier modes separate:
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- `COLLAPSE` requires `ratio` in `(0, 1]` and supports triangle budget,
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vertex-group weighting/inversion, triangulate, symmetry axis and tolerance.
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- `UNSUBDIV` requires a positive integer `iterations` and rejects collapse or
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dissolve-only parameters.
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- `DISSOLVE_PLANAR` requires `angleLimit` in `[0, PI]`, with explicit
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boundary delimit flags and dissolve-boundary handling.
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The parser also enforces non-negative source revisions and error codes for
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missing vertex groups, unsupported cross-mode fields, invalid budgets and LOD
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manifests whose triangle budgets do not decrease. A browser E2E test covers a
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valid collapse profile, a two-level manifest and the missing-vertex-group
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failure.
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The common profile now carries an explicit `attributePolicy`
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(`PRESERVE`/`RECOMPUTE_NORMALS`/`DROP`) and a validated `SkinSimplifyPolicy`
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with maximum influences, minimum weight, maximum position error and shape-key
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handling. Vertex-group and symmetry-only fields are conditionally optional, so
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the TypeScript contract and runtime validator no longer disagree when those
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features are disabled.
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The protocol is now exercised end-to-end by the native/WASM command path:
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`decimateMesh` validates `sourceMeshRevision`, returns a new SceneIR revision,
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and the browser-facing smoke checks topology counts, index bounds and attribute
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buffer lengths. Native Blender/WASM golden parity for all parameter
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combinations remains part of W-079; implementation of the declared skin policy
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remains W-076.
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