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ECS index API wip: support creating & storing indices

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This commit is contained in:
Nikita Lisitsa 2024-01-10 00:12:55 +03:00
parent 080893ee96
commit 8fcaef4ba1
2 changed files with 56 additions and 0 deletions
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11
libs/ecs/include/psemek/ecs/container.hpp
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@ -8,6 +8,7 @@
#include <psemek/ecs/detail/component_uuid_helper.hpp>
#include <psemek/ecs/detail/without.hpp>
#include <psemek/ecs/detail/component_registry.hpp>
#include <psemek/ecs/detail/index_container.hpp>
#include <psemek/ecs/accessor.hpp>
#include <psemek/ecs/exceptions.hpp>
#include <psemek/util/range.hpp>
@ -375,11 +376,15 @@ namespace psemek::ecs
template <typename ... Components, typename Function>
void watch(Function && function);
template <typename Index, typename ... Args>
Index & index(Args && ... args);
private:
detail::entity_list entity_list_;
detail::table_container table_container_;
detail::query_cache_container query_cache_container_;
detail::component_registry component_registry_;
detail::index_container index_container_;
std::vector<util::uuid> uuid_helper_;
util::hash_set<util::uuid> uuid_set_helper_;
@ -656,4 +661,10 @@ namespace psemek::ecs
callback_caches_.push_back(cache);
}
template <typename Index, typename ... Args>
Index & container::index(Args && ... args)
{
return index_container_.get<Index>(*this, std::forward<Args>(args)...);
}
}

45
libs/ecs/include/psemek/ecs/detail/index_container.hpp Normal file
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@ -0,0 +1,45 @@
#pragma once
#include <psemek/util/uuid.hpp>
#include <psemek/util/hash_table.hpp>
#include <psemek/util/type_name.hpp>
#include <psemek/util/exception.hpp>
#include <memory>
namespace psemek::ecs
{
struct container;
}
namespace psemek::ecs::detail
{
struct index_container
{
template <typename Index, typename ... Args>
Index & get(container & container, Args && ... args)
{
auto uuid = Index::uuid();
if (auto it = storage_.find(uuid); it != storage_.end())
return *reinterpret_cast<Index *>(it->second.get());
if constexpr (std::is_constructible_v<Index, ecs::container &, Args && ...>)
{
auto ptr = std::make_shared<Index>(container, std::forward<Args>(args)...);
storage_.insert({uuid, ptr});
return *ptr;
}
else
{
throw util::exception("Index " + util::type_name<Index>() + " is neither present nor constructible");
}
}
private:
util::hash_map<util::uuid, std::shared_ptr<void>> storage_;
};
}