Created
June 13, 2020 07:35
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struct game_manager { | |
struct rng rng; | |
struct sprite_atlas atlas; | |
struct scene scene; | |
struct creature player; | |
struct input_manager input_manager; | |
}; | |
void game_manager_init(struct game_manager* self) { | |
srand(time(NULL)); | |
rng_init(&self->rng, rand()); | |
sprite_atlas_init(&self->atlas, "/data/Assets/...tileset.v4.png", 16, 16); | |
creature_init(&self->player, 161); | |
scene_init(&self->scene, &self->rng, &self->player, 15, 20); | |
input_manager_init(&self->input_manager); | |
event_emitter_subscribe(&self->input_manager.events, | |
self, (void (*)(void*, void*, void*))game_manager_handle_event); | |
event_emitter_subscribe(&self->player.events, | |
self, (void (*)(void*, void*, void*))game_manager_handle_event); | |
} | |
// ...other game_manager stuff... | |
void game_manager_free(struct game_manager* self) { | |
creature_free(&self->player); | |
scene_free(&self->scene); | |
sprite_atlas_free(&self->atlas); | |
input_manager_free(&self->input_manager); | |
} | |
///////////////////////////////////////////////////////////////////////////// | |
struct input_manager { | |
bool is_movement_input_present; | |
enum direction movement_input_direction; | |
struct event_emitter events; | |
}; | |
void input_manager_init(struct input_manager* self) { | |
self->is_movement_input_present = false; | |
self->movement_input_direction = DIR_NONE; | |
event_emitter_init(&self->events); | |
} | |
// ...other input_manager stuff... | |
void input_manager_free(struct input_manager* self) { | |
event_emitter_free(&self->events); | |
} | |
//////////////////////////////////////////////////////////////////////////// | |
struct event_emitter_listener { | |
void (*callback)(void*, void*, void*); | |
void *context; | |
}; | |
struct event_emitter { | |
int listeners_count; | |
struct event_emitter_listener* listeners; | |
}; | |
void event_emitter_init(struct event_emitter* self) { | |
self->listeners_count = 0; | |
self->listeners = malloc(2 * sizeof(struct event_emitter_listener)); | |
} | |
void event_emitter_subscribe(struct event_emitter* self, void* context, void (*callback)(void*, void*, void*)) { | |
int n = self->listeners_count; | |
if (n > 0 && (n & (n - 1)) == 0) { | |
self->listeners = realloc(self->listeners, 2 * n * sizeof(struct event_emitter_listener)); | |
} | |
self->listeners[self->listeners_count] = (struct event_emitter_listener) { | |
.callback = callback, | |
.context = context, | |
}; | |
self->listeners_count++; | |
} | |
void event_emitter_emit(struct event_emitter* self, void* sender, void* event) { | |
for (int i = 0; i < self->listeners_count; i++) { | |
struct event_emitter_listener* listener = &self->listeners[i]; | |
listener->callback(listener->context, sender, event); | |
} | |
} | |
void event_emitter_free(struct event_emitter* self) { | |
free(self->listeners); | |
} |
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