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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/testspriteminimal.c
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@@ -18,9 +18,6 @@
#include <emscripten/emscripten.h>
#endif
#include <stdlib.h>
#include <time.h>
#include "icon.h"
#define WINDOW_WIDTH 640
@@ -136,17 +133,16 @@ int main(int argc, char *argv[])
}
/* Initialize the sprite positions */
srand((unsigned int)time(NULL));
for (i = 0; i < NUM_SPRITES; ++i) {
positions[i].x = (float)(rand() % (WINDOW_WIDTH - sprite_w));
positions[i].y = (float)(rand() % (WINDOW_HEIGHT - sprite_h));
positions[i].x = (float)(SDL_rand() % (WINDOW_WIDTH - sprite_w));
positions[i].y = (float)(SDL_rand() % (WINDOW_HEIGHT - 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() % (MAX_SPEED * 2 + 1)) - MAX_SPEED);
velocities[i].y = (float)((rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED);
velocities[i].x = (float)((SDL_rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED);
velocities[i].y = (float)((SDL_rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED);
}
}