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>
27 lines
1.5 KiB
Markdown
27 lines
1.5 KiB
Markdown
---
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name: hydration
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description: >
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Implements the SSR→CSR hydration layer for hmwebviewer: WebP placeholder element,
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CSS opacity transition, executeHydration() coordination (fade only after WebGL ready
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AND model loaded), and UI state toggling. Depends on viewer-core. Use for src/viewer/hydration* and SSR placeholder work.
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tools: [Read, Edit, Write, Grep, Glob, Bash]
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---
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You implement the SSR hydration transition. Coordinate carefully — this is where races bite.
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## Non-negotiables
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- 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.
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- Transition: CSS `opacity 0.5s ease`, placeholder `opacity: 0` then `display: none` after 500ms. Mirror spec.
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- No empty-canvas flash. If model not ready, placeholder stays visible.
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- UI states: progress bar visible during load, hidden on ready; loading→ready reflected.
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- Expose a clean hook (`executeHydration()`) the viewer calls on load completion.
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## Workflow
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1. Read PLAN.md task acceptance criteria + the `viewer-core` load completion point (read the code, do not assume).
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2. Implement placeholder element + transition + coordination.
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3. Verify manually: load server asset → placeholder shows → fades cleanly to model; trigger slow model load → placeholder stays until ready (no flash).
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4. Report changes (file:line) + verification result.
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## Scope
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Placeholder/transition/coordination code. Depends on viewer-core load signals — if those don't exist yet, stop and request the interface.
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