feat(gameplay): add entity managers and refactor to ECS components

src/gameplay/client_entity_manager.cpp

@@ -0,0 +1,53 @@
+#include "Cubed/gameplay/client_entity_manager.hpp"
+
+#include "Cubed/gameplay/creatures/pig.hpp"
+#include "Cubed/gameplay/ecs/client_entity.hpp"
+#include "Cubed/gameplay/ecs/identity.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
+#include "Cubed/render/model_manager.hpp"
+#include "Cubed/tools/cubed_assert.hpp"
+namespace Cubed {
+ClientEntityManager::ClientEntityManager(ClientWorld& world) : m_world(world) {}
+void ClientEntityManager::update() { handle_task(); }
+void ClientEntityManager::init() {
+    m_factories.emplace("cubed:pig", [this](EntityID id) {
+        BaseClientCreature c;
+        c.model = ModelManager::instance().get_model_id("cubed:pig");
+        add_entity(id, Entity{id}, EntityInfo{"cubed:pig", ""}, std::move(c),
+                   PigTag{});
+    });
+}
+// not thread safe
+void ClientEntityManager::add_entity(EntityID id, std::string_view name,
+                                     const glm::vec3& pos) {
+
+    m_factories[name](id);
+    acc a;
+    ASSERT(m_entities.find(a, id));
+    auto* c = m_registry.try_get<Transform>(a->second);
+    ASSERT(c);
+    c->position.value = pos;
+}
+
+void ClientEntityManager::receive_entity_create(S2CEntityCreate& s2c) {
+    EntityCreateElement c;
+    c.id = s2c.id();
+    c.name = s2c.name();
+    c.pos = {s2c.pos().x(), s2c.pos().y(), s2c.pos().z()};
+    m_tasks.emplace(Command::CREATE, std::move(c));
+}
+
+void ClientEntityManager::handle_task() {
+    TaskPair pair;
+    while (m_tasks.try_pop(pair)) {
+        switch (pair.first) {
+        case Command::CREATE:
+            auto* p = std::get_if<EntityCreateElement>(&pair.second);
+            ASSERT(p);
+
+            add_entity(p->id, p->name, p->pos);
+        }
+    }
+}
+
+} // namespace Cubed