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Fire: Use LibC srand()

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This commit is contained in:
Brendan Coles 2020-04-28 00:17:31 +00:00 • committed by Andreas Kling
parent 23ec578a01
commit c4d3723087
1 changed files with 2 additions and 18 deletions
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20
Demos/Fire/Fire.cpp
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@ -70,22 +70,6 @@ static const Color s_palette[] = {
Color(0xCF, 0xCF, 0x6F), Color(0xEF, 0xEF, 0xC7), Color(0xFF, 0xFF, 0xFF) Color(0xCF, 0xCF, 0x6F), Color(0xEF, 0xEF, 0xC7), Color(0xFF, 0xFF, 0xFF)
}; };
/* Random functions...
* These are from musl libc's prng/rand.c
*/
static uint64_t seed;
void my_srand(unsigned s)
{
seed = s - 1;
}
static int my_rand(void)
{
seed = 6364136223846793005ULL * seed + 1;
return seed >> 33;
}
/* /*
* Fire Widget * Fire Widget
*/ */
@ -129,7 +113,7 @@ Fire::Fire()
cycles = 0; cycles = 0;
phase = 0; phase = 0;
my_srand(time(nullptr)); srand(time(nullptr));
stop_timer(); stop_timer();
start_timer(20); start_timer(20);
@ -170,7 +154,7 @@ void Fire::timer_event(Core::TimerEvent&)
/* Paint our palettized buffer to screen */ /* Paint our palettized buffer to screen */
for (int px = 0 + phase; px < FIRE_WIDTH; px += 2) { for (int px = 0 + phase; px < FIRE_WIDTH; px += 2) {
for (int py = 1; py < 200; py++) { for (int py = 1; py < 200; py++) {
int rnd = my_rand() % 3; int rnd = rand() % 3;
/* Calculate new pixel value, don't go below 0 */ /* Calculate new pixel value, don't go below 0 */
u8 nv = bitmap->bits(py)[px]; u8 nv = bitmap->bits(py)[px];