diff options
| author | emersion <contact@emersion.fr> | 2017-10-04 22:01:54 +0200 |
|---|---|---|
| committer | emersion <contact@emersion.fr> | 2017-10-04 22:01:54 +0200 |
| commit | 3b226ba81a4fd5217dcc2004d30a82e97fddbf17 (patch) | |
| tree | c862f9eb850c7bf8b9c924957f602810a75cfcd2 | |
| parent | 09a6d863cf9b6e7fba459ede2b9769e78535b11a (diff) | |
rootston: rotation by steps
| -rw-r--r-- | rootston/cursor.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/rootston/cursor.c b/rootston/cursor.c index c26ca43a..aad6751e 100644 --- a/rootston/cursor.c +++ b/rootston/cursor.c @@ -1,3 +1,4 @@ +#define _XOPEN_SOURCE 500 #include <stdbool.h> #include <stdint.h> #include <string.h> @@ -114,6 +115,8 @@ void cursor_update_position(struct roots_input *input, uint32_t time) { int vx = input->cursor->x - ox, vy = input->cursor->y - oy; float angle = atan2(vx*uy - vy*ux, vx*ux + vy*uy); + int steps = 12; + angle = round(angle/M_PI*steps) / (steps/M_PI); view->rotation = input->view_rotation + angle; } break; |