Recettes pratiques

Monde minimal

C

ecs_init();
ecs_entity_t entity = ecs_new();
ecs_kill(entity);
ecs_fini();

C++

ecs::init();
auto entity = ecs::entity::create();
entity.kill();
ecs::fini();

Boucle avec le temps

C

ecs_set_resource(Time, { .dt = 1.0f / 60.0f });
ecs_progress();

C++

ecs::resource_handle<Time>().set(Time{ .dt = 1.0f / 60.0f });
ecs::progress();

Parent et enfant

C

ecs_relate(child, ChildOf, parent);

C++

child.child_of(parent);

Composant optionnel

C

ecs_query_each(it, i, ecs_in(Position), ecs_in_optional(Health)) {
    Position *position = ecs_field(&it, 0);
    Health *health = ecs_field(&it, 1);
    if (health != NULL) position[i].x += health[i].value;
}

C++

ecs::query().each([](Position &position, ecs::optional<Health> health) {
    if (health) position.x += health->value;
});

Réagir à une modification

C

ecs_observer({
    .on = EcsOnSet,
    .query.components = { ecs_in(Position) },
    .callback = on_position_set,
});

C++

ecs::observe<ecs::OnSet>().each([](const Position &position) {
    on_position_set(position);
});