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https://github.com/Jous99/F4MP.git
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97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
#pragma once
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template <class... T> struct OwnerView
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{
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using TView = entt::basic_view<entt::entity, entt::get_t<OwnerComponent, T...>, entt::exclude_t<>>;
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struct iterator
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{
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iterator(Player* apPlayer, typename TView::iterator aItor, typename TView::iterator aEnd, const TView& aView)
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: m_pPlayer{apPlayer}
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, m_itor{aItor}
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, m_end{aEnd}
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, m_view{aView}
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{
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}
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iterator& operator++()
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{
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do
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{
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m_itor++;
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} while (m_itor != m_end && m_view.template get<OwnerComponent>(*m_itor).GetOwner() != m_pPlayer);
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return *this;
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}
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bool operator!=(const iterator& acRhs) const { return m_itor != acRhs.m_itor; }
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bool operator==(const iterator& acRhs) const { return m_itor == acRhs.m_itor; }
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decltype(auto) operator*() { return m_itor.operator*(); }
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[[nodiscard]] decltype(auto) operator->() const { return m_itor.operator->(); }
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[[nodiscard]] decltype(auto) operator*() const { return m_itor.operator*(); }
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private:
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Player* m_pPlayer;
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typename TView::iterator m_itor;
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typename TView::iterator m_end;
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const TView& m_view;
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};
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decltype(auto) find(entt::entity aEntity) const;
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decltype(auto) begin() const;
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decltype(auto) end() const;
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template <class... Components> decltype(auto) get(entt::entity aEntity);
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template <class... Components> decltype(auto) get(entt::entity aEntity) const;
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OwnerView(entt::registry& aRegistry, Player* apPlayer);
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private:
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TView m_view;
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Player* m_pPlayer;
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};
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template <class... T>
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OwnerView<T...>::OwnerView(entt::registry& aRegistry, Player* apPlayer)
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: m_view(aRegistry.view<OwnerComponent, T...>())
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, m_pPlayer(apPlayer)
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{
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}
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template <class... T> decltype(auto) OwnerView<T...>::find(entt::entity aEntity) const
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{
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auto it = m_view.find(aEntity);
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if (it == m_view.end())
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return end();
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if (m_view.template get<OwnerComponent>(*it).GetOwner() == m_pPlayer)
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return iterator(m_pPlayer, it, std::end(m_view), m_view);
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return end();
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}
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template <class... T> decltype(auto) OwnerView<T...>::begin() const
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{
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return iterator(m_pPlayer, std::begin(m_view), std::end(m_view), m_view);
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}
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template <class... T> decltype(auto) OwnerView<T...>::end() const
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{
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return iterator(m_pPlayer, std::end(m_view), std::end(m_view), m_view);
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}
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template <class... T> template <class... Components> decltype(auto) OwnerView<T...>::get(entt::entity aEntity)
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{
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return m_view.template get<Components...>(aEntity);
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}
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template <class... T> template <class... Components> decltype(auto) OwnerView<T...>::get(entt::entity aEntity) const
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{
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return m_view.template get<Components...>(aEntity);
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}
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