GLUTRESHAPEFUNC(3)

✨ glutReshapeFunc — the Reshape callback glow-up ✨

okay bestie, gather round, because this one is literally about making your window know when it got resized 💖

Library: OpenGLUT — windowcallback 🪟

---

🌸 SYNOPSIS 🌸

#include <openglut.h>

void
glutReshapeFunc(void( *callback )( int w, int h ));

---

🎀 PARAMETERS 🎀

• callback — the client function that handles the reshape-window event. yes queen, this is your function, your rules 💅

---

💖 DESCRIPTION 💖

So here's the tea: you hand OpenGLUT a function, and OpenGLUT registers it and then calls it whenever the window is reshaped or resized. iconic behavior, honestly.

tiny but crucial detail: your callback only fires when the host window system has actually changed the window size. no fake news resizes, only the real ones ✨

The parameters your callback gets handed are the new width and height of your window. so like, w and h, freshly measured, no cap 🦋

Now — if you don't provide a reshape callback at all? OpenGLUT doesn't just sit there. It simply calls:

glViewport(0,0, w, h);

and keeps it moving. default behavior ate, fr fr 💅

Also important: this callback is bound to the current window. the way that it's current-window specific… yeah. keep that in mind 👑

And if you wanna ask OpenGLUT about the present dimensions of the current window, you can use glutGet(). she'll tell you 🌈

---

💀 CAVEATS 💀

Listen. This is the part where you gotta pay attention, bestie, because it's different from the other callbacks:

• Unlike other callbacks, GLUT has an active default behavior if you do not set this. Most event types just passively do nothing when you don't specify a callback to handle them — they're chill like that. This one? Not chill. It does something on its own 😭
• The reshape callback should always be called, if registered, when your window is first created. so like, first creation counts. don't be surprised by that first call, that's just how she is 🌸

---

👑 SEE ALSO 👑

• glutGet(3)
• glutReshapeWindow(3)

---

and that's the whole page, periodt 🫶 this lil slice of OpenGLUT wisdom is undated and, uh, officially untitled — the footer said UNDATED and UNTITLED(), which is honestly the most mysterious main character energy a manpage could possibly have 💜✨