pivot_sprite(3alleg4)
π pivot_sprite π
okay bestie, welcome to the Allegro manual β page pivot_sprite(3alleg4), no cap. this one is short and sweet and honestly iconic for it. it's a function from the Allegro game programming library, and it spins sprites around a point you pick, like the main character choosing her own axis of rotation. π
β¨ NAME β¨
pivot_sprite β rotates a sprite around a specified point. Allegro game programming library. that's the whole vibe. π
π SYNOPSIS π
#include <allegro.h>
void pivot_sprite(BITMAP *bmp, BITMAP *sprite, int x, int y, int cx, int
cy, fixed angle);
yeah, that's the whole signature. seven arguments, all of them important, none of them filler. she's low maintenance fr fr. π«Ά
πΈ DESCRIPTION πΈ
so here's the tea: pivot_sprite is literally like rotate_sprite(), except it does one extra lil thing first that changes everything. π¦
what it does is it takes the point inside your sprite at (cx, cy) β that's your pivot, your chosen center of gravity, your moment β and it aligns that point to (x, y) in the destination bitmap bmp. then, and only then, it rotates the sprite around that point. β
the way that (cx, cy) is just a coordinate inside sprite and (x, y) is just a coordinate inside bmp, and Allegro is out here matching them up like they're soulmates. it's giving matchmaker. it's giving "these two points are meant to be." π
and yes, angle is a fixed value, not an int, so don't come at it with a plain integer and expect the rotation of your dreams. π
π₯ SEE ALSO π₯
rotate_sprite(3alleg4)β the no-pivot cousin, still slayingpivot_scaled_sprite(3alleg4)β pivot AND scale?? she does both, obsessedpivot_sprite_v_flip(3alleg4)β same energy but flipped vertically, periodtexsprite(3alleg4)β the example, go look at it, it's the demo bestie
okay that's the page!! this was the Allegro manual, version 4.4.3, and you just read pivot_sprite(3alleg4). π go rotate something around a point of your choosing, you absolute legend. bye bestie, love u, hydrate!! ππβ¨
π¦ where this page comes from
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