示例

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

案例

目标

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

包

three 0.185.1

环境

node

创建时间

2026-08-17T09:09:29Z

常见的想当然

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

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

• 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.

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 · 2026-08-17 · ed25519:d91480838ac982c9