Mercurial > hgrepos > Python2 > PyMuPDF
diff mupdf-source/thirdparty/freeglut/progs/demos/spaceball/vmath.c @ 2:b50eed0cc0ef upstream
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
The directory name has changed: no version number in the expanded directory now.
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Mon, 15 Sep 2025 11:43:07 +0200 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mupdf-source/thirdparty/freeglut/progs/demos/spaceball/vmath.c Mon Sep 15 11:43:07 2025 +0200 @@ -0,0 +1,16 @@ +#include <math.h> +#include "vmath.h" + +quat_t quat_rotate(quat_t q, float angle, float x, float y, float z) +{ + quat_t rq; + float half_angle = angle * 0.5f; + float sin_half = (float)sin(half_angle); + + rq.w = (float)cos(half_angle); + rq.x = x * sin_half; + rq.y = y * sin_half; + rq.z = z * sin_half; + + return quat_mul(q, rq); +}