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Added SDL_srand(), SDL_rand(), and SDL_rand_r() (thanks @JKaniarz!)

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These are simple random functions that should not be used for serious random number generation.

Fixes https://github.com/libsdl-org/SDL/issues/4968
This commit is contained in:
Sam Lantinga
2024-06-16 07:20:11 -07:00
parent 9cb4bb92f6
commit d1d484ddbe
23 changed files with 203 additions and 89 deletions
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12
test/testffmpeg.c
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@@ -14,9 +14,6 @@
* For a more complete video example, see ffplay.c in the ffmpeg sources.
*/
#include <stdlib.h>
#include <time.h>
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
#include <SDL3/SDL_test.h>
@@ -1486,17 +1483,16 @@ int main(int argc, char *argv[])
/* Position sprites and set their velocities */
SDL_Rect viewport;
SDL_GetRenderViewport(renderer, &viewport);
srand((unsigned int)time(NULL));
for (i = 0; i < num_sprites; ++i) {
positions[i].x = (float)(rand() % (viewport.w - sprite_w));
positions[i].y = (float)(rand() % (viewport.h - sprite_h));
positions[i].x = (float)(SDL_rand() % (viewport.w - sprite_w));
positions[i].y = (float)(SDL_rand() % (viewport.h - sprite_h));
positions[i].w = (float)sprite_w;
positions[i].h = (float)sprite_h;
velocities[i].x = 0.0f;
velocities[i].y = 0.0f;
while (velocities[i].x == 0.f || velocities[i].y == 0.f) {
velocities[i].x = (float)((rand() % (2 + 1)) - 1);
velocities[i].y = (float)((rand() % (2 + 1)) - 1);
velocities[i].x = (float)((SDL_rand() % (2 + 1)) - 1);
velocities[i].y = (float)((SDL_rand() % (2 + 1)) - 1);
}
}