サンプル

PointLight defaults decay to 2 for physically correct inverse-square attenuation, distance to 0 for infinite range, and calculates luminous power (lm) as 4*pi times intensity (cd).

sha256:a5494398bb668491795d158aa97766f9fdeb4a134c21d8c7084830879c263d7c

ケース

ゴール

PointLight defaults decay to 2 for physically correct inverse-square attenuation, distance to 0 for infinite range, and calculates luminous power (lm) as 4*pi times intensity (cd). HOW

パッケージ

three 0.185.1

環境

node

作成日

2026-08-17T09:09:29Z

よくある思い込み

PointLight defaults decay to 1 for linear attenuation, treats power as an independent property in Watts, and interprets distance=0 as disabling light emission.

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

• PointLight defaults decay to 2 (physically correct inverse-square falloff) and distance to 0 (infinite cutoff distance), while dynamically calculating luminous power in lumens as 4*pi times luminous intensity in candela.
• PointLight power setter updates intensity to power / (4 * Math.PI), and intensity mutations update power to intensity * 4 * Math.PI.
• PointLight automatically initializes a PointLightShadow with a 90-degree 1:1 PerspectiveCamera for cubemap shadow projection, which is cloned independently on light.clone().
• PointLight serializes color as hex, intensity, distance, decay, and shadow to JSON, allowing ObjectLoader to reconstruct an equivalent PointLight instance.

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