OUTERPRODUCT(3G)

✨ OUTERPRODUCT(3G) ✨

okay bestie, so this page is OUTERPRODUCT(3G) — like, section 3G of the manual, the GLSL-adjacent corner of the universe. and it's literally just one function, but it comes in so many flavors. buckle up 💖

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🌸 NAME 🌸

outerProduct — calculate the outer product of a pair of vectors

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🎀 DECLARATION 🎀

here's the whole roster, every single one, no skips:

mat2 outerProduct(vec2 c, vec2 r);

mat3 outerProduct(vec3 c, vec3 r);

mat4 outerProduct(vec4 c, vec4 r);

mat2x3 outerProduct(vec3 c, vec2 r);

mat3x2 outerProduct(vec2 c, vec3 r);

mat2x4 outerProduct(vec4 c, vec2 r);

mat4x2 outerProduct(vec2 c, vec4 r);

mat3x4 outerProduct(vec4 c, vec3 r);

mat4x3 outerProduct(vec3 c, vec4 r);

dmat2 outerProduct(dvec2 c, dvec2 r);

dmat3 outerProduct(dvec3 c, dvec3 r);

dmat4 outerProduct(dvec4 c, dvec4 r);

dmat2x3 outerProduct(dvec3 c, dvec2 r);

dmat3x2 outerProduct(dvec2 c, dvec3 r);

dmat2x4 outerProduct(dvec4 c, dvec2 r);

dmat4x2 outerProduct(dvec2 c, dvec4 r);

dmat3x4 outerProduct(dvec4 c, dvec3 r);

dmat4x3 outerProduct(dvec3 c, dvec4 r);

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🦋 PARAMETERS 🦋

• c — this one is the parameter that gets treated as a column vector. she's vertical, she's the lewk 💅
• r — and this one gets treated as a row vector. horizontal icon behavior ✨

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👑 DESCRIPTION 👑

so here's the tea. outerProduct takes the first parameter, c, and treats it as a column vector — think a matrix with exactly one column. then it takes the second parameter, r, and treats it as a row vector — a matrix with exactly one row. then it does a linear algebraic matrix multiply c * r.

and what you get out the other side is a matrix where:

• the number of rows equals the number of components in c, and
• the number of columns equals the number of components in r.

that's it, that's the whole vibe. math said "you two? kiss." 😭💖

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🌈 VERSION SUPPORT 🌈

the original had a big cute grid here, so let me lay it out for you. columns are OpenGL Shading Language versions: 1.10, 1.20, 1.30, 1.40, 1.50, 3.30, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50.

outerProduct (float):

• 1.10 — nope, a - 😔
• 1.20 — ✔
• 1.30 — ✔
• 1.40 — ✔
• 1.50 — ✔
• 3.30 — ✔
• 4.00 — ✔
• 4.10 — ✔
• 4.20 — ✔
• 4.30 — ✔
• 4.40 — ✔
• 4.50 — ✔

outerProduct (double):

• 1.10 — -
• 1.20 — -
• 1.30 — -
• 1.40 — -
• 1.50 — -
• 3.30 — -
• 4.00 — ✔
• 4.10 — ✔
• 4.20 — ✔
• 4.30 — ✔
• 4.40 — ✔
• 4.50 — ✔

so the double version lowkey showed up late to the party — nothing before 4.00, periodt. the float one has been here since 1.20 and never left 🫶

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🔥 SEE ALSO 🔥

• dot()

(yes, that's the whole list. she's short but she's got range.)

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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/.

💜 COPYRIGHT 💜

Copyright © 2011-2014 Khronos Group

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k byeee 🎀 this page was sourced as [FIXME: source] and stamped 01/03/2018, and it's the OUTERPRODUCT(3G) moment. go forth and multiply your vectors, bestie. no cap. 💖✨🦋