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authorkatherine <ageha@airen-no-jikken.icu>2021-02-11 00:41:56 -0700
committerkatherine <ageha@airen-no-jikken.icu>2021-02-11 00:41:56 -0700
commit51ba9e5494cb848cd29fa174c0dcea4a5ac96eef (patch)
tree793b8f5f269af9155a371072cff280568be54d7e /02-wolfautomata/src
parentc0bebcff77eacd58903e487533c510df1916b5e7 (diff)
downloadallegro-sketches-51ba9e5494cb848cd29fa174c0dcea4a5ac96eef.tar.gz
wolfrand
Diffstat (limited to '02-wolfautomata/src')
-rw-r--r--02-wolfautomata/src/main.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/02-wolfautomata/src/main.c b/02-wolfautomata/src/main.c
new file mode 100644
index 0000000..d884280
--- /dev/null
+++ b/02-wolfautomata/src/main.c
@@ -0,0 +1,162 @@
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <allegro5/allegro5.h>
+#include <allegro5/allegro_primitives.h>
+
+#define DISP_WIDTH 960
+#define DISP_HEIGHT 480
+
+#define FPS 60.0
+
+#define DO_INIT(check, desc) \
+ if (!(check)) { \
+ fprintf(stderr, "err: can't initialise %s\n", desc); \
+ rval = 1; \
+ goto done; \
+ }
+
+static bool bit_get(uint8_t *bline, unsigned off)
+{
+ return (bline[off / 8] >> (off % 8)) & 0x01;
+}
+
+static void bit_set(uint8_t *bline, unsigned off)
+{
+ bline[off / 8] = (bline[off / 8] | (0x01 << (off % 8)) );
+}
+
+int main(int argc, char **argv)
+{
+ int rval = 0;
+ unsigned goframes;
+
+ uint8_t bits[DISP_HEIGHT][DISP_WIDTH / 8];
+
+ uint8_t automaton = 0;
+ unsigned x, y;
+
+ ALLEGRO_DISPLAY* d = NULL;
+ ALLEGRO_TIMER* t = NULL;
+ ALLEGRO_EVENT_QUEUE* eq = NULL;
+ ALLEGRO_EVENT e;
+
+ DO_INIT(al_init(), "allegro");
+ DO_INIT(al_init_primitives_addon(), "primitives");
+ DO_INIT(al_install_keyboard(), "keyboard");
+
+ DO_INIT(t = al_create_timer(1.0 / FPS), "timer");
+ DO_INIT(eq = al_create_event_queue(), "event queue");
+
+ al_set_new_display_option(ALLEGRO_SINGLE_BUFFER, 1, ALLEGRO_REQUIRE);
+ DO_INIT(d = al_create_display(DISP_WIDTH, DISP_HEIGHT), "display");
+
+ al_register_event_source(eq, al_get_keyboard_event_source());
+ al_register_event_source(eq, al_get_display_event_source(d));
+ al_register_event_source(eq, al_get_timer_event_source(t));
+
+ al_start_timer(t);
+ goframes = 0;
+
+reset:
+
+ al_clear_to_color(al_map_rgb(0, 0, 0));
+ memset(bits, 0, DISP_HEIGHT * DISP_WIDTH / 8);
+
+ /* seed bit */
+ bit_set(bits[0], DISP_WIDTH / 2);
+
+ for (y = 0; y < DISP_HEIGHT - 1; y++) {
+ for (x = 1; x < DISP_WIDTH - 2; x++) {
+ if (
+ bit_get(&automaton,
+ bit_get(bits[y], x + 2)
+ + bit_get(bits[y], x + 1) * 2
+ + bit_get(bits[y], x) * 4
+ )
+ ) {
+ bit_set(bits[y + 1], x + 1);
+ }
+ }
+ }
+
+ while(true) {
+ al_wait_for_event(eq, &e);
+
+ switch (e.type) {
+
+ case ALLEGRO_EVENT_DISPLAY_CLOSE:
+ goto done;
+
+ case ALLEGRO_EVENT_KEY_DOWN:
+ switch(e.keyboard.keycode) {
+
+ case ALLEGRO_KEY_UP:
+ automaton += 10;
+ printf("%d\n", automaton);
+ break;
+
+ case ALLEGRO_KEY_DOWN:
+ automaton -= 10;
+ printf("%d\n", automaton);
+ break;
+
+ case ALLEGRO_KEY_LEFT:
+ automaton -= 1;
+ printf("%d\n", automaton);
+ break;
+
+ case ALLEGRO_KEY_RIGHT:
+ automaton += 1;
+ printf("%d\n", automaton);
+ break;
+
+ case ALLEGRO_KEY_ENTER:
+ goframes = DISP_HEIGHT;
+ goto reset;
+
+ default:
+ continue;
+
+ }
+
+ case ALLEGRO_EVENT_TIMER:
+ if (goframes == 0) {
+ al_flip_display();
+ break;
+ }
+
+ /* draw line */
+ for (x = 0; x < DISP_WIDTH; x++) {
+ if (bit_get(bits[DISP_HEIGHT - goframes], x)) {
+ al_draw_filled_rectangle(
+ (float)x, (float)(DISP_HEIGHT - goframes),
+ (float)(x + 1), (float)(DISP_HEIGHT - goframes + 1),
+ al_map_rgb(255, 255, 255)
+ );
+ }
+ }
+
+ al_flip_display();
+
+ goframes--;
+
+ if (goframes == 0)
+ puts("next");
+ }
+ }
+
+
+done:
+
+ if (d)
+ al_destroy_display(d);
+ if (t)
+ al_destroy_timer(t);
+ if (eq)
+ al_destroy_event_queue(eq);
+
+ return rval;
+}