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Destroyed entity should free its components

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This commit is contained in:
NukeBird 2025-02-19 23:56:08 +03:00
parent 52d6b7c4c3
commit 5705238d57
1 changed files with 20 additions and 12 deletions
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32
zecsy.hpp
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@ -29,12 +29,6 @@ namespace zecsy
return true;
}();
/*
* Using std::set for entities_set to maintain sorted order, which can
* improve cache locality during queries and iterations.
*/
using entities_set = std::set<entity_id>;
class system_scheduler final
{
public:
@ -120,10 +114,10 @@ namespace zecsy
void query(std::invocable<T&...> auto&& system);
private:
entities_set alive_entities;
entity_id entity_counter = 0;
using comp_id = size_t;
std::set<entity_id> alive_entities;
std::unordered_map<entity_id, std::set<comp_id>> entity_to_comps;
entity_id entity_counter = 0;
struct component_pool
{
@ -151,12 +145,24 @@ namespace zecsy
{
auto id = ++entity_counter;
alive_entities.emplace(id);
// entity_to_comps[id] = {};
return id;
}
inline void world::destroy_entity(entity_id e)
{
alive_entities.erase(e);
for(comp_id id: entity_to_comps[e])
{
auto& pool = pools[id];
auto index = pool.entity_to_index[e];
pool.entity_to_index.erase(e);
pool.index_to_entity.erase(index);
pool.free_list.emplace_back(index);
}
entity_to_comps.erase(e);
}
inline bool world::is_alive(entity_id e) const
@ -167,10 +173,9 @@ namespace zecsy
template<Component T>
inline bool world::has(entity_id e) const
{
auto id = get_component_id<T>();
if(pools.contains(id))
if(entity_to_comps.contains(e))
{
return pools.at(id).entity_to_index.contains(e);
return entity_to_comps.at(e).contains(get_component_id<T>());
}
return false;
}
@ -211,6 +216,8 @@ namespace zecsy
new(&pool.data[index * sizeof(T)]) T(comp);
pool.entity_to_index[e] = index;
pool.index_to_entity[index] = e;
entity_to_comps[e].emplace(id);
}
template<Component T>
@ -234,6 +241,7 @@ namespace zecsy
pool.free_list.push_back(index);
pool.entity_to_index.erase(e);
pool.index_to_entity.erase(index);
entity_to_comps[e].erase(id);
}
template<Component First, Component Second, Component... Rest>