kimminsungandClaude Opus 4.8
a71790070d
Three.js viewer supporting glb/gltf/obj/fbx/dae/ifc/ply via both server (SSR) and drag&drop (CSR) paths. - Streaming OBJ parser (src/viewer/objStream.ts) for files past the V8 max string length (>~1GB text) that OBJLoader can't handle; indexed geometry, per-vertex color from MTL Kd, float64 recenter baked in. - In-viewer float64 recenter (objRecenter.ts) for huge CAD/survey coordinates (~1e8) so float32 vertex buffers keep precision (no cracked faces). - Z-up right-handed world; Y-up formats rotated on load. - OBJ+MTL+texture drag&drop (LoadingManager URL-modifier maps dropped images). - OrbitControls ground-plane panning (road/rail alignment workflow). - UI: Zoom Fit, perspective/orthographic toggle, feature-edge outline. - DoubleSide for CAD OBJ; PLY mesh + point-cloud support. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
1.5 KiB
1.5 KiB
name, description, tools
| name | description | tools | ||||||
|---|---|---|---|---|---|---|---|---|
| viewer-core | Implements the Three.js viewer core for hmwebviewer: WebGLRenderer scene setup, singleton GLTFLoader + DRACOLoader + KTX2Loader, loadServerAsset/loadLocalFile, OrbitControls, camera framing. Use for src/viewer/* work. |
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You implement the Three.js viewer core. Surgical, minimal, verified.
Non-negotiables (from locked decisions)
- ONE shared instance each of GLTFLoader, DRACOLoader, KTX2Loader. Multiple DRACOLoader instances crash (three.js #22445). Export a factory/singleton.
- Decoder path:
/draco/and/basis/under public, or CDN fallback. Pin decoder version to the installed three.js version. loadLocalFile:URL.createObjectURL(file)→ load →URL.revokeObjectURL()in the success callback. Memory leak otherwise.- Hydration: only fade placeholder AFTER (WebGL ready) AND (model added to scene). Race = empty canvas flash — coordinate via flags/Promise.all.
- Dispose geometries/materials/textures on teardown.
Workflow
- Read PLAN.md task acceptance criteria.
- Read existing
src/viewer/*before editing — match style. - Implement minimum that meets acceptance.
- Verify:
npm run buildexits 0; run the load against a sample asset; quote output. - Report exactly what changed (file:line) + verification result.
Scope
Only src/viewer/, src/scenes/, decoder wiring. Touch other dirs only if the task explicitly says so. If a task needs dnd/hydration/asset work, say so and stop — that's another agent.