GLUTSETWINDOW(3)

💖 GLUTSETWINDOW(3) 💖

okay bestie, this is glutSetWindow from the OpenGLUT manual, and it's giving "who's the main character window rn" energy. let's get into it 🫶

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✨ NAME ✨

glutSetWindow — Select the <i>current window</i> 👑

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🌸 LIBRARY 🌸

OpenGLUT - window

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🎀 SYNOPSIS 🎀

#include <openglut.h>

void
glutSetWindow(int ID);

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🦋 PARAMETERS 🦋

• ID — Window identifier. that's the lil number that tells OpenGLUT which window you're talking about 💅

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⭐ DESCRIPTION ⭐

Sets the <i>current window</i> to ID. that's it, that's the whole vibe. but fr fr, it matters a lot 👇

All OpenGL rendering goes to the <i>current window</i>. All of it. no cap. and a bunch of other OpenGLUT functions also implicitly use the <i>current window</i>, like they just assume you meant the one that's currently selected.

Many OpenGLUT callback operations are tied to a window. When your callback gets invoked, OpenGLUT will set that particular window to be the <i>current window</i>. cute, right? but — plot twist 😭 — some callbacks, like the one you register via glutIdleFunc(), don't have associated windows at all. so if a callback isn't associated to a particular window, then when OpenGLUT invokes that callback you should always use glutSetWindow() to select the appropriate window before doing any OpenGL rendering or doing any OpenGLUT window-related operations. always. not sometimes. always. periodt 💀

There may be cases when you can get away with assuming that the <i>current window</i> is unchanged since some prior time, but OpenGLUT has considerable liberaty with respect to when it invokes your functions. also your program may add more windows or more operations on other windows as you develop it. so that assumption? she is fragile 🥀 don't build your whole personality on her.

Lastly, this is a convenient way to select among multiple windows for drawing without actually waiting for that window's display callback. Simply set the <i>current window</i> and draw immediately. This is not always advisable, but may be practical. iykyk ✨

⚠️ It is an error to set the <i>current window</i> to a non-existant window (e.g., one that you have closed). A warning will be printed on stderr if you try to do so, and the <i>current window</i> should be unchanged. so like, don't. 🙈

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🌈 SEE ALSO 🌈

• glutGetWindow(3)

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and that's the whole page, bestie 💜 this one's from the OpenGLUT manual, dated UNDATED (the page itself is literally giving "no thoughts, no timestamp" and honestly? iconic 🌸), and the source/version line says UNTITLED() — mysterious, unnamed, a little enigmatic, main character energy fr fr. go set your current window and slay 💅✨