GLUTSPACEBALLBUTTONFUNC(3)

💖 glutSpaceballButtonFunc — the spaceball button callback page 💖

ok so this is glutSpaceballButtonFunc(3), bestie. it lives in the OpenGLUT manual, in the input section. yes we are doing input today. buckle up. 🎀

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✨ LIBRARY ✨

OpenGLUT — input 🦋

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✨ SYNOPSIS ✨

#include <openglut.h>

void
glutSpaceballButtonFunc(void( *callback )( int button, int state ));

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✨ PARAMETERS ✨

• callback — your client spaceball button hook. that's the lil function that gets pinged when a spaceball button does a thing. 💅

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✨ DESCRIPTION ✨

okay so real talk: this function registers a callback so a spaceball can report its buttons. if you've never met a spaceball, she's iconic — she has six axes of freedom (three of motion and three of orientation), plus buttons. main character energy fr fr. 👑

the spaceball has glutDeviceGet(GLUT_NUM_SPACEBALL_BUTTONS) and numbers them from 1. so button one is the first button, not the zeroth button, we are NOT doing zero-indexing in this house (well. except for the mouse. more on that in a sec. 😭).

button state is either GLUT_UP or GLUT_DOWN. that's it. that's the whole vibe check. 🌈

the callback is bound to the current window. so like, wherever you are when you register it? that's her home. 🏠✨

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✨ CAVEATS ✨

⚠️ bestie. listen. OpenGLUT does not implement spaceball support. 😭 the whole thing is a no-op. she's on the roster but she does not play. registered, sure, but never called. i know. i'm sorry.

and one more wrinkle for the road: mouse buttons are numbered from 0 in the GLUT API. so spaceball buttons start at 1, mouse buttons start at 0. inconsistent? yes. is it a wrinkle? the original literally calls it a wrinkle, so. it's a wrinkle. 🫠

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✨ SEE ALSO ✨

• glutSpaceballRotateFunc(3)
• glutSpaceballMotiononFunc,(3) 💀 (yes, that's the name, i'm not touching it, that's canon)

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and that's the whole page, bestie!! mwah 🫶

this one's dated UNDATED and it comes from UNTITLED() — a true mystery icon, no date, no title, just vibes ✨🌸 go forth and call your callbacks, even the ones that never fire 💖