INTERPOLATEATOFFSET(3G)

✨ INTERPOLATEATOFFSET 💅

okay bestie, welcome to the 3G manual page for interpolateAtOffset — yes that's the GLSL section, you're in the right place, breathe 🫶

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🌸 NAME 🌸

interpolateAtOffset — sample a varying at specified offset from the center of a pixel

like… you pick a spot inside a pixel and ask "hey what's the varying value right there" and it tells you. iconic behavior honestly ✨

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🎀 DECLARATION 🎀

look at these signatures, they're giving overloaded queen 👑

float interpolateAtOffset(float interpolant, vec2 offset);

vec2 interpolateAtOffset(vec2 interpolant, vec2 offset);

vec3 interpolateAtOffset(vec3 interpolant, vec2 offset);

vec4 interpolateAtOffset(vec4 interpolant, vec2 offset);

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🦋 PARAMETERS 🦋

• interpolant — the interpolant you wanna sample at that specified offset. that's the thing you're asking about 💖
• offset — the offset from the center of the pixel where you want interpolant sampled. this is your little "here, specifically here" pointer 🌸

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💜 DESCRIPTION 💜

so interpolateAtOffset returns the value of the input varying interpolant sampled at an offset from the center of the pixel specified by offset.

the two floating-point components of offset give the offset in pixels in the x and y directions from the center of the pixel, respectively. so like, component one = x direction, component two = y direction, no cap 📍

an offset of (0, 0) identifies the center of the pixel. that's home base, bestie 🏠

and the range and granularity of offsets supported by this function is implementation-dependent. so don't come for me if your driver has opinions, that's just how it is 😭

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🔥 VERSION SUPPORT 🔥

the "OpenGL Shading Language Version" tea ☕ here's when interpolateAtoOffset actually shows up:

• 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 yeah she didn't exist until 4.00 and then she ate every single version after 💅 periodt.

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🌈 SEE ALSO 🌈

• interpolateAtCentroid()
• interpolateAtSample()

the whole interpolate-at-a-thing friend group, go read them too 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/.

Copyright © 2011-2014 Khronos Group

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okay that's the whole page bestie, you're officially educated 🧚✨ and for the record, this came out of the [FIXME: source] manual, dated 01/03/2018, filed under INTERPOLATEATOFFSET(3G) — mwah, go forth and sample those varyings 💖🎀