GL_LOCALINVOCATIONIN(3G)

💖 NAME 💖

okay bestie, welcome to the manual page with header title GL_LOCALINVOCATIONIN(3G) and manual-name slot [FIXME: manual] — this is all about gl_LocalInvocationIndex, and she is literally the local linear index of the work item your compute shader is currently operating on. iconic. ✨

gl_LocalInvocationIndex — contains the local linear index of work item currently being operated on by a compute shader. (name-line vibe preserved fr fr.)

🛠️ DECLARATION 🛠️

the raw declaration line on this page is:

in uint gl_LocalInvocationIndex ;.SH "DESCRIPTION"

yes, the .SH "DESCRIPTION" bit is attached in the original — it's just the manpage macro gremlin doing its thing 💀

✨ DESCRIPTION ✨

so in the compute language, gl_LocalInvocationIndex is a derived input variable. she contains the 1-dimensional linearized index of the work invocation within the work group that the current shader is executing on. no cap.

the value of gl_LocalInvocationIndex is equal to:

gl_LocalInvocationID.z * gl_WorkGroupSize.x * gl_WorkGroupSize.y + gl_LocalInvocationID.y * gl_WorkGroupSize.x + gl_LocalInvocationID.x

iykyk — that formula is the whole moment. 🦋

👑 VERSION SUPPORT 👑

the table header says OpenGL Shading Language Version, and the row label is Variable Name: gl_LocalInvocationIndex.

here's the version vibe check, preserving every column:

• 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 page marks 4.40 and 4.50 with ✔, and everything from 1.10 through 4.30 with -. periodt. 🌸

🫶 SEE ALSO 🫶

• gl_NumWorkGroups()
• gl_WorkGroupID()
• gl_WorkGroupSize()
• gl_LocalInvocationID()

📜 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 (again, bestie) 📜

Copyright © 2012-2014 Khronos Group

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okay that's the whole page, mwah 💋. xoxo, your girl signing off — source/version: [FIXME: source], date: 08/09/2021, and the title up top is GL_LOCALINVOCATIONIN(3G). stay slay and keep those work group indices linearized 💅✨