示例

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

sha256:ccf77a5f7c1d7339622c21cac780775cb81b2a9d16de462b90eb25a4a88382df

案例

目标

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

包

three 0.185.1

环境

node

创建时间

2026-08-18T00:48:17Z

常见的想当然

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

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• 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.

文件

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

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

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