ProjectorLightNode: Fix back-projection.#31473
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Mugen87
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Jul 22, 2025
Mugen87
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Jul 22, 2025
📦 Bundle sizeFull ESM build, minified and gzipped.
🌳 Bundle size after tree-shakingMinimal build including a renderer, camera, empty scene, and dependencies.
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Fixed #31461.
Description
The PR prevents back-projection when using
ProjectorLight. This bug was present in the initial code from #24589 and unfortunately ported to the node system.The idea is to the check the
wcoordinate ofspotLightCoordsince this variable represents the fragment's position in the light's clip space. The sign of w determines whether a fragment is in front or behind the light.