BlackMATov/ecs.hpp
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empty component storage optimization

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This commit is contained in:
Matvey Cherevko
2019-04-12 21:12:28 +07:00
parent d93427fb52
commit a9afcbc245
2 changed files with 140 additions and 74 deletions
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27
ecs_tests.cpp
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@@ -28,6 +28,10 @@ namespace
velocity_c(int nx, int ny) : x(nx), y(ny) {}
};
struct movable_c {
};
static_assert(std::is_empty<movable_c>::value, "!!!");
bool operator==(const position_c& l, const position_c& r) noexcept {
return l.x == r.x
&& l.y == r.y;
@@ -1226,6 +1230,29 @@ TEST_CASE("registry") {
3 * sizeof(std::size_t) +
1 * sizeof(ecs::entity_id));
}
{
ecs::registry w;
auto e1 = w.create_entity();
auto e2 = w.create_entity();
e1.assign_component<movable_c>();
e2.assign_component<movable_c>();
REQUIRE(w.component_memory_usage<movable_c>() ==
4 * sizeof(std::size_t) +
2 * sizeof(ecs::entity_id));
}
}
SECTION("empty_component") {
ecs::registry w;
auto e1 = w.create_entity();
ecs::entity_filler(e1)
.component<movable_c>()
.component<position_c>(1, 2)
.component<velocity_c>(3, 4);
REQUIRE(w.exists_component<movable_c>(e1));
REQUIRE(w.find_component<movable_c>(e1));
w.for_joined_components<movable_c, position_c>([
](const ecs::const_entity&, movable_c&, position_c&){
});
}
}