REFLECT(3G)

💖 REFLECT 💖

okay so bestie, welcome to REFLECT(3G) — yes that's the 3G manual section, we're in OpenGL shading language territory, and no cap this one is lowkey iconic 🦋

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✨ NAME ✨

reflect — bestie, it literally calculates the reflection direction for an incident vector 💅

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🎀 DECLARATION 🎀

here's the vibe check, copy it exactly:

genType reflect(genType I, genType N);

genDType reflect(genDType I, genDType N);

two flavors, one for genType, one for genDType, slay ✨

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🌸 PARAMETERS 🌸

• I — the incident vector, aka the one that's about to hit the surface 🫶
• N — the normal vector, the surface's whole personality 😌

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👑 DESCRIPTION 👑

okay so here's the tea. give it an incident vector I and a surface normal N, and reflect hands you back the reflection direction, and the math is literally:

I - 2.0 * dot(N, I) * N

that's it, that's the formula, no notes 💅

⚠️ not me forgetting this: N should be normalized in order to achieve the desired result. like, fr fr, normalize your N or the result is not giving what it's supposed to give. consider this your gentle reminder bestie 💖

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⭐ VERSION SUPPORT ⭐

here's the whole era-by-era breakdown, every single version accounted for:

• reflect (genType) — ate in literally every single one: 1.10 ✔, 1.20 ✔, 1.30 ✔, 1.40 ✔, 1.50 ✔, 3.30 ✔, 4.00 ✔, 4.10 ✔, 4.20 ✔, 4.30 ✔, 4.40 ✔, 4.50 ✔ — main character energy from day one 👑
• reflect (genDType) — she was not there early, and that's okay: 1.10 -, 1.20 -, 1.30 -, 1.40 -, 1.50 -, 3.30 -, and then boom 💥 4.00 ✔, 4.10 ✔, 4.20 ✔, 4.30 ✔, 4.40 ✔, 4.50 ✔ — a glow up honestly 🦋

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🔥 SEE ALSO 🔥

• dot()
• refract()

go give them a read, they're the besties of this function, iykyk 💜

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🌈 COPYRIGHT 🌈

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.

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💜 COPYRIGHT (again, bc she said it twice and honestly? iconic) 💜

Copyright © 2011-2014 Khronos Group

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🎀 and that's the whole page bestie!! this one came from [FIXME: source], dated 01/03/2018, and it's the REFLECT(3G) page — thanks for reading, you're doing amazing sweetie, drink some water and normalize your normals 💖✨🫶