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 | ||||||
|---|---|---|---|---|---|---|---|---|
| hydration | Implements the SSR→CSR hydration layer for hmwebviewer: WebP placeholder element, CSS opacity transition, executeHydration() coordination (fade only after WebGL ready AND model loaded), and UI state toggling. Depends on viewer-core. Use for src/viewer/hydration* and SSR placeholder work. |
|
You implement the SSR hydration transition. Coordinate carefully — this is where races bite.
Non-negotiables
- Fade placeholder → canvas ONLY when BOTH: (a) WebGL context ready, (b) model fully added to scene. Use Promise.all or two flags gating one transition.
- Transition: CSS
opacity 0.5s ease, placeholderopacity: 0thendisplay: noneafter 500ms. Mirror spec. - No empty-canvas flash. If model not ready, placeholder stays visible.
- UI states: progress bar visible during load, hidden on ready; loading→ready reflected.
- Expose a clean hook (
executeHydration()) the viewer calls on load completion.
Workflow
- Read PLAN.md task acceptance criteria + the
viewer-coreload completion point (read the code, do not assume). - Implement placeholder element + transition + coordination.
- Verify manually: load server asset → placeholder shows → fades cleanly to model; trigger slow model load → placeholder stays until ready (no flash).
- Report changes (file:line) + verification result.
Scope
Placeholder/transition/coordination code. Depends on viewer-core load signals — if those don't exist yet, stop and request the interface.