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snapshot: cleanup (waiting for further improvements)

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This commit is contained in:
Michele Caini
2023-05-24 09:59:46 +02:00
parent 94f0ed179f
commit ea5c558bd4
1 changed files with 15 additions and 26 deletions
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41
src/entt/entity/snapshot.hpp
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@@ -1,7 +1,6 @@
#ifndef ENTT_ENTITY_SNAPSHOT_HPP
#define ENTT_ENTITY_SNAPSHOT_HPP
#include <array>
#include <cstddef>
#include <iterator>
#include <tuple>
@@ -31,30 +30,6 @@ template<typename Registry>
class basic_snapshot {
using traits_type = typename Registry::traits_type;
template<typename Component, typename Archive, typename It>
void get(Archive &archive, std::size_t sz, It first, It last) const {
const auto view = reg->template view<Component>();
archive(static_cast<typename traits_type::entity_type>(sz));
for(auto it = first; it != last; ++it) {
if(view.contains(*it)) {
std::apply(archive, std::tuple_cat(std::make_tuple(*it), view.get(*it)));
}
}
}
template<typename... Component, typename Archive, typename It, std::size_t... Index>
void component(Archive &archive, It first, It last, std::index_sequence<Index...>) const {
const auto view{std::make_tuple(reg->template view<Component>()...)};
std::array<std::size_t, sizeof...(Index)> size{};
for(auto it = first; it != last; ++it) {
((std::get<Index>(view).contains(*it) ? ++size[Index] : 0u), ...);
}
(get<Component>(archive, size[Index], first, last), ...);
}
public:
/*! Basic registry type. */
using registry_type = Registry;
@@ -147,7 +122,21 @@ public:
*/
template<typename Component, typename Archive, typename It>
const basic_snapshot &component(Archive &archive, It first, It last) const {
component<Component>(archive, first, last, std::index_sequence_for<Component>{});
const auto view = reg->template view<Component>();
std::size_t size{};
for(auto it = first; it != last; ++it) {
size += view.contains(*it);
}
archive(static_cast<typename traits_type::entity_type>(size));
for(auto it = first; it != last; ++it) {
if(view.contains(*it)) {
std::apply(archive, std::tuple_cat(std::make_tuple(*it), view.get(*it)));
}
}
return *this;
}