TEXTUREPROJ(3G)

💖 TEXTUREPROJ(3G) 💖

okay bestie, welcome to the [FIXME: manual] page for TEXTUREPROJ(3G) and honestly? she's iconic. pull up a chair, grab a boba, we're learning about projected texture lookups 🧋✨

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✨ NAME ✨

textureProj — perform a texture lookup with projection 💅

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🌸 DECLARATION 🌸

here's the whole overload roster, fr fr, copied character for character, no notes:

gvec4 textureProj(gsampler1D sampler, vec2 P, [float bias]);

gvec4 textureProj(gsampler1D sampler, vec4 P, [float bias]);

gvec4 textureProj(gsampler2D sampler, vec3 P, [float bias]);

gvec4 textureProj(gsampler2D sampler, vec4 P, [float bias]);

gvec4 textureProj(gsampler3D sampler, vec4 P, [float bias]);

float textureProj(sampler1DShadow sampler, vec4 P, [float bias]);

float textureProj(sampler2DShadow sampler, vec4 P, [float bias]);

gvec4 textureProj(gsampler2DRect sampler, vec3 P);

gvec4 textureProj(gsampler2DRect sampler, vec4 P);

float textureProj(gsampler2DRectShadow sampler, vec4 P);

like, look at all those overloads. she has RANGE. 👑

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🎀 PARAMETERS 🎀

• sampler — this is the sampler the texture you're pulling texels out of is bound to. it's giving "which texture am I even looking at" energy 🫶
• P — the texture coordinates where the texture gets sampled. your little map of where you wanna peek 🗺️
• bias — optional bias that gets applied during level-of-detail computation. optional!! she's a bonus, not a requirement ✨

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🦋 DESCRIPTION 🦋

okay so textureProj does a texture lookup with projection. the texture coordinates consumed from P — and listen, this is not including the last component of P — get divided by the last component of P. division era 💅

then the resulting 3rd component of P in the shadow forms is used as Dref. 🎯

after all those values get computed, the texture lookup just proceeds exactly like it does in texture(). same vibes, different setup. periodt. 🌈

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🌈 VERSION SUPPORT 🌈

so this is the OpenGL Shading Language Version tea ☕ — which versions said yes and which ones said absolutely not. ✔ means she's supported, - means she's not there yet 💀

• textureProj
  • 1.10 — -
  • 1.20 — -
  • 1.30 — ✔
  • 1.40 — ✔
  • 1.50 — ✔
  • 3.30 — ✔
  • 4.00 — ✔
  • 4.10 — ✔
  • 4.20 — ✔
  • 4.30 — ✔
  • 4.40 — ✔
  • 4.50 — ✔
• textureProj (gsampler2DRect{Shadow})
  • 1.10 — -
  • 1.20 — -
  • 1.30 — -
  • 1.40 — ✔
  • 1.50 — ✔
  • 3.30 — ✔
  • 4.00 — ✔
  • 4.10 — ✔
  • 4.20 — ✔
  • 4.30 — ✔
  • 4.40 — ✔
  • 4.50 — ✔

not the 2DRect one showing up fashionably late to the 1.40 party 😭 honestly relatable.

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👑 SEE ALSO 👑

the whole friend group, go say hi:

texelFetch(), texelFetchOffset(), texture(), textureGather(), textureGatherOffset(), textureGatherOffsets(), textureGrad(), textureGradOffset(), textureLod(), textureLodOffset(), textureOffset(), textureProjGrad(), textureProjGradOffset(), textureProjLod(), textureProjLodOffset(), textureProjOffset(), textureQueryLod(), textureSize()

a whole squad. 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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and that's the whole page bestie!! 🌸 she came from [FIXME: source], she's dated 01/03/2018, and she's filed under TEXTUREPROJ(3G). go forth and project those texels, you absolute main character 🦋💖🎀