GLPOLYGONOFFSET(3G)

✨ NAME ✨

okay so bestie, welcome to glPolygonOffset from the 3G manual — yes, the GLPOLYGONOFFSET(3G) girlies are literally here. This one is “set the scale and units used to calculate depth values”. Periodt. 💅

📝 C SPECIFICATION

void glPolygonOffset(GLfloat factor, GLfloat units);

🎀 PARAMETERS

• factor — specifies a scale factor that is used to create a variable depth offset for each polygon. The initial value is 0.
• units — is multiplied by an implementation-specific value to create a constant depth offset. The initial value is 0.

💖 DESCRIPTION

When GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT is enabled, each fragment's depth value will be offset after it is interpolated from the depth values of the appropriate vertices. The value of the offset is factor × DZ + r × units, where DZ is a measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into the depth buffer.

glPolygonOffset is useful for rendering hidden-line images, for applying decals to surfaces, and for rendering solids with highlighted edges. iconic use cases, no cap. ✨

🔎 ASSOCIATED GETS

• glIsEnabled() with argument GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT.
• glGet() with argument GL_POLYGON_OFFSET_FACTOR or GL_POLYGON_OFFSET_UNITS.

🦋 VERSION SUPPORT

version-support vibe check: under OpenGL Version, the Function / Feature Name glPolygonOffset is checked ✔ in every listed version, bestie:

• OpenGL 2.0 — ✔
• OpenGL 2.1 — ✔
• OpenGL 3.0 — ✔
• OpenGL 3.1 — ✔
• OpenGL 3.2 — ✔
• OpenGL 3.3 — ✔
• OpenGL 4.0 — ✔
• OpenGL 4.1 — ✔
• OpenGL 4.2 — ✔
• OpenGL 4.3 — ✔
• OpenGL 4.4 — ✔
• OpenGL 4.5 — ✔

👀 SEE ALSO

• glDepthFunc()
• glEnable()
• glGet()
• glIsEnabled()

📜 COPYRIGHT

Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

📜 COPYRIGHT

• Copyright © 1991-2006 Silicon Graphics, Inc.
• Copyright © 2010-2014 Khronos Group

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okay that’s the whole page, mwah 💋 — source/version is [FIXME: source], the date is 08/09/2021, and this iconic little number is GLPOLYGONOFFSET(3G). byeee 🫶💖