7f23d71b6a
This function is useful for accumulating relative mouse motion if you want to only handle whole pixel movement.
e.g.
static float dx_frac, dy_frac;
float dx, dy;
/* Accumulate new motion with previous sub-pixel motion */
dx = event.motion.xrel + dx_frac;
dy = event.motion.yrel + dy_frac;
/* Split the integral and fractional motion, dx and dy will contain whole pixel deltas */
dx_frac = SDL_modff(dx, &dx);
dy_frac = SDL_modff(dy, &dy);
if (dx != 0.0f || dy != 0.0f) {
...
}
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| .. | ||
| SDL_crc16.c | ||
| SDL_crc32.c | ||
| SDL_getenv.c | ||
| SDL_iconv.c | ||
| SDL_malloc.c | ||
| SDL_mslibc.c | ||
| SDL_qsort.c | ||
| SDL_stdlib.c | ||
| SDL_string.c | ||
| SDL_strtokr.c | ||
| SDL_vacopy.h | ||