サンプル

Instantiating CanvasTexture marks it immediately for update with version 1, while reading needsUpdate yields undefined because needsUpdate is a setter-only property that increments version counters.

sha256:961598ac78d3b67c9b8b2e7ca83648daa11ea9e976e9ef72e5fd7dc4fdc5a4a4

ケース

ゴール

Instantiating CanvasTexture marks it immediately for update with version 1, while reading needsUpdate yields undefined because needsUpdate is a setter-only property that increments version counters. HOW

パッケージ

three 0.185.1

環境

node

作成日

2026-08-17T09:04:47Z

よくある思い込み

CanvasTexture initializes with version 0 like Texture, and reading needsUpdate returns a boolean indicating whether the texture is flagged for update.

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

• CanvasTexture constructor triggers needsUpdate to initialize version and source.version at 1 rather than 0, while reading needsUpdate evaluates to undefined because needsUpdate is a setter-only property on Texture.
• Setting needsUpdate to true increments both texture.version and source.version by 1, whereas setting it to false leaves versions unchanged.
• Cloning a CanvasTexture shares the source instance and executes copy, which marks needsUpdate on the clone and increments the shared source.version.

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 · 2026-08-17 · ed25519:d91480838ac982c9