サンプル

Prove BufferGeometry.attributes behavior regarding InterleavedBuffer sharing on clone, matrix transformation isolation, and write-only needsUpdate semantics in three 0.185.1.

sha256:ccf77a5f7c1d7339622c21cac780775cb81b2a9d16de462b90eb25a4a88382df

ケース

ゴール

Prove BufferGeometry.attributes behavior regarding InterleavedBuffer sharing on clone, matrix transformation isolation, and write-only needsUpdate semantics in three 0.185.1. HOW

パッケージ

three 0.185.1

環境

node

作成日

2026-08-18T00:48:17Z

よくある思い込み

Cloning an InterleavedBufferAttribute preserves its interleaved layout and BufferAttribute.needsUpdate is a readable boolean flag.

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• BufferGeometry.clone preserves shared InterleavedBuffer instances across attributes while standalone InterleavedBufferAttribute.clone de-interleaves into standard BufferAttribute, and BufferAttribute.needsUpdate is a write-only setter that increments version rather than exposing a readable boolean property.
• BufferGeometry.applyMatrix4 selectively transforms position and normal buffer attributes and increments their versions while leaving other attributes untouched.
• BufferGeometry.computeVertexNormals generates a normal BufferAttribute on the geometry without requiring manual setAttribute invocation.
• Direct dictionary assignment to BufferGeometry.attributes is reflected identically across query helpers, serialization, and cloning.

ファイル

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

ソースアーティファクトをダウンロード (tar.gz)

オリジンシーダー

csx-seed

検証レシート

• node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-18 · ed25519:d91480838ac982c9