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/apps/examples/circle-raster: acc variant

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This commit is contained in:
veclavtalica 2025-01-25 02:28:40 +03:00
parent 34a3de73c6
commit ab3c032313
1 changed files with 27 additions and 3 deletions
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30
apps/examples/circle-raster/game.c
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@ -56,6 +56,26 @@ static void benchmark(struct state *state) {
profile_end("int32_t");
profile_start("int32_t acc");
for (int i = 0; i < 1000; ++i) {
int32_t const rsi = (int32_t)state->r * (int32_t)state->r;
int32_t acc = 1;
for (int32_t iy = (int32_t)state->r - 1; iy >= 0; --iy) {
while (acc * acc < rsi - iy * iy) acc++;
for (int32_t ix = -acc; ix < acc; ++ix) {
/* lower portion */
x = (float)ix;
y = (float)iy;
/* upper portion */
x = (float)ix;
y = (float)-iy - 1;
}
}
}
profile_end("int32_t acc");
(void)x; (void)y;
}
@ -82,10 +102,14 @@ void game_tick(void) {
state->r -= 1;
int32_t const rsi = (int32_t)state->r * (int32_t)state->r;
for (int32_t iy = -(int32_t)state->r; iy <= (int32_t)state->r - 1; ++iy) {
int32_t const dx = ceil_sqrt(rsi - (iy + (iy <= 0)) * (iy + (iy <= 0)));
for (int32_t ix = -dx; ix < dx; ++ix) {
int32_t acc = 1;
for (int32_t iy = (int32_t)state->r - 1; iy >= 0; --iy) {
while (acc * acc < rsi - iy * iy) acc++;
for (int32_t ix = -acc; ix < acc; ++ix) {
/* lower portion */
draw_box((Rect){mouse_snap.x + (float)ix * 8, mouse_snap.y + (float)iy * 8, 8, 8}, 1, (Color){125, 125, 0, 255});
/* upper portion */
draw_box((Rect){mouse_snap.x + (float)ix * 8, mouse_snap.y + (float)(-iy - 1) * 8, 8, 8}, 1, (Color){125, 125, 0, 255});
}
}