init

main.c

@@ -0,0 +1,54 @@
+#include "cat_api.h"
+#include <time.h>
+
+#define NS_PER_TICK 30000000
+
+void bye(void)
+{
+	printf("bye!\n");
+	exit(0);
+}
+
+void process_input(void)
+{
+	struct cat_event* e = cat_get_event();
+	if (e == NULL) return;
+	if (e->type == QUIT) bye();
+	else if (e->type == KEYDOWN) printf("keypress! %c\n", e->key);
+	else if (e->type == KEYUP) printf("key up! %c\n", e->key);
+	else if (e->type == MOUSEMOVE) printf("mouse move! (%d, %d)\n", e->mousex, e->mousey);
+	else if (e->type == MOUSEDOWN) printf("mouse down! %02x\n", e->mouse_button);
+	else if (e->type == MOUSEUP) printf("mouse up! %02x\n", e->mouse_button);
+}
+
+static long last_sec = 0;
+static long last_nsec = 0;
+
+void tick(void)
+{
+	/* run every N milliseconds... nanoseconds? idk */
+	struct timespec t;
+	clock_gettime(CLOCK_REALTIME, &t);
+	if (last_sec == 0) goto yes;
+	else if ((t.tv_sec - last_sec) > 0) goto yes;
+	else if ((t.tv_nsec - last_nsec) > NS_PER_TICK) goto yes;
+	else return;
+	yes:	last_sec = t.tv_sec;
+		last_nsec = t.tv_nsec;
+}
+
+void game_loop(void)
+{
+	process_input();
+	tick();
+	cat_render();
+}
+
+int main(int argc, char** argv)
+{
+	cat_init();
+	cat_create_window(1920, 1080);
+	cat_fill(0, 1, 0, 0, screen_width - 1, screen_height - 1, 132, 155, 132);
+	while (1) game_loop();
+	return 0;
+}