aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorkatherine <ageha@airen-no-jikken.icu>2021-02-10 07:46:58 -0700
committerkatherine <ageha@airen-no-jikken.icu>2021-02-10 07:46:58 -0700
commitf6da9f36c65231557e7a9f05a870261116a4f5b1 (patch)
treebe532d012fc71345a1ca43bb3263e9e5e4b4f199
downloadallegro-sketches-f6da9f36c65231557e7a9f05a870261116a4f5b1.tar.gz
random walk toy
-rw-r--r--README.md1
-rw-r--r--rwalk/Makefile29
-rw-r--r--rwalk/src/main.c165
3 files changed, 195 insertions, 0 deletions
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..bcf5efc
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+allegro graphics toys
diff --git a/rwalk/Makefile b/rwalk/Makefile
new file mode 100644
index 0000000..da68641
--- /dev/null
+++ b/rwalk/Makefile
@@ -0,0 +1,29 @@
+CFLAGS+=-Wall -O2 $(shell pkg-config --cflags allegro-5 allegro_primitives-5 libsodium)
+CFLAGSDEBUG=-Wall -ggdb3 -O0 -DDEBUG $(shell pkg-config --cflags allegro-5 allegro_primitives-5 libsodium)
+LDFLAGS+=-Wall -O2 $(shell pkg-config --libs allegro-5 allegro_primitives-5 libsodium)
+LDFLAGSDEBUG=-Wall -ggdb3 -O0 -DDEBUG $(shell pkg-config --libs allegro-5 allegro_primitives-5 libsodium)
+SRCDIR=./src
+OBJDIR=./build
+SRC=$(wildcard $(SRCDIR)/*.c)
+OBJ=$(patsubst $(SRCDIR)%.c,$(OBJDIR)%.o,$(SRC))
+BIN=rwalk
+
+all: $(OBJ)
+ $(CC) $(LDFLAGS) -o $(BIN) $^
+
+$(OBJ): | $(OBJDIR)
+
+$(OBJDIR)/%.o: $(SRCDIR)/%.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+$(OBJDIR):
+ mkdir -p $(OBJDIR)
+
+clean:
+ rm -rf $(OBJDIR) $(BIN)
+
+debug: CFLAGS=$(CFLAGSDEBUG)
+debug: LDFLAGS=$(LDFLAGSDEBUG)
+debug: all
+
+new: clean all
diff --git a/rwalk/src/main.c b/rwalk/src/main.c
new file mode 100644
index 0000000..28592e4
--- /dev/null
+++ b/rwalk/src/main.c
@@ -0,0 +1,165 @@
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <allegro5/allegro5.h>
+#include <allegro5/allegro_primitives.h>
+
+#include <sodium.h>
+
+#define DO_INIT(check, desc) \
+ if (!(check)) { \
+ fprintf(stderr, "err: can't initialise %s\n", desc); \
+ rval = 1; \
+ goto done; \
+ }
+
+int main(int argc, char **argv)
+{
+ int rval = 0;
+ unsigned goframes;
+ uint32_t randbytes;
+
+ struct {
+ uint32_t middle;
+ uint32_t upper;
+ uint32_t lower;
+ } biases[4] = {
+ /* unbiased */
+ {
+ .middle = 0x80000000,
+ .upper = 0xc0000000,
+ .lower = 0x40000000,
+ },
+ /* 1/64 */
+ {
+ .middle = 0x7c000000,
+ .upper = 0xbe000000,
+ .lower = 0x3e000000,
+ },
+ /* 1/32 */
+ {
+ .middle = 0x78000000,
+ .upper = 0xbc000000,
+ .lower = 0x3c000000,
+ },
+ /* 1/16 */
+ {
+ .middle = 0x70000000,
+ .upper = 0xb8000000,
+ .lower = 0x38000000,
+ }
+ };
+ unsigned setting = 0;
+
+ ALLEGRO_DISPLAY* d = NULL;
+ ALLEGRO_TIMER* t = NULL;
+ ALLEGRO_EVENT_QUEUE* eq = NULL;
+ ALLEGRO_EVENT e;
+
+ float x = 320.0, y = 240.0;
+
+
+ DO_INIT(sodium_init() >= 0, "sodium");
+
+ 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 / 30.0), "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(641, 481), "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_clear_to_color(al_map_rgb(0, 0, 0));
+
+
+ goframes = 0;
+ al_start_timer(t);
+ 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_1:
+ setting = 0;
+ puts("1");
+ break;
+
+ case ALLEGRO_KEY_2:
+ setting = 1;
+ puts("2");
+ break;
+
+ case ALLEGRO_KEY_3:
+ setting = 2;
+ puts("3");
+ break;
+
+ case ALLEGRO_KEY_4:
+ setting = 3;
+ puts("4");
+ break;
+
+ default:
+ break;
+
+ }
+
+ if (! (e.keyboard.keycode == ALLEGRO_KEY_ENTER) )
+ continue;
+
+ goframes = 1000;
+ case ALLEGRO_EVENT_TIMER:
+ if (goframes == 0) {
+ al_flip_display();
+ break;
+ }
+
+ al_draw_filled_rectangle(x, y, x + 1.0, y + 1.0, al_map_rgb(255, 255, 255));
+
+ randbytes = randombytes_random();
+
+ if (randbytes >= biases[setting].middle) {
+ if (randbytes >= biases[setting].upper)
+ x += 1;
+ else
+ y += 1;
+ } else {
+ if (randbytes >= biases[setting].lower)
+ x -= 1;
+ else
+ y -= 1;
+ }
+
+ 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;
+}