54 lines
1.6 KiB
Markdown
54 lines
1.6 KiB
Markdown
# OpenSpec Change: enterprise-gaming-r3f-lod
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- **Change ID**: enterprise-gaming-r3f-lod
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- **Package**: `@suaveplan/r3f-lod`
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- **Category**: gaming/effects
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- **Target path**: `gaming/effects/r3f-lod`
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- **Status**: PROPOSED
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- **Date**: 2026-04-24
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---
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## Summary
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Deliver `@suaveplan/r3f-lod` on the genesis branch from scratch at enterprise quality. The package provides level-of-detail management for React Three Fiber. An `LodGroup` component accepts child meshes paired with distance thresholds; the `LodManager` evaluates camera distance each frame and swaps the active mesh; a `BillboardLod` fallback renders a sprite at maximum distance. Supports hysteresis bands to prevent LOD flickering. Genesis adds structured errors, OTel active-lod-level histogram, and 100% coverage.
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---
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## Available workspace deps
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`@suaveplan/error`, react, `@react-three/fiber`, `@react-three/drei`, three.
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---
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## Public API surface
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```ts
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function LodGroup(props: LodGroupProps): JSX.Element
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// levels: { distance: number; children: ReactNode }[]
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// hysteresis?: number
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function BillboardLod(props: BillboardLodProps): JSX.Element
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// atlasTexture, frameIndex, sizeAttenuation
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function useLod(ref: RefObject<Object3D>): number // current LOD level
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```
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---
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## File layout
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```text
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gaming/effects/r3f-lod/
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package.json / tsconfig.json / vitest.config.ts
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src/
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index.ts / error-codes.ts
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types/common.ts + md
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core/lod-manager/ (ts + md + types + test + index)
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components/
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LodGroup/ (tsx + md + test + stories + index)
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BillboardLod/ (tsx + md + test + stories + index)
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hooks/use-lod.ts + md + test
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tests/integration.test.ts
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```
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