💿🐜 Antkeeper source code
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266 lines
6.4 KiB
266 lines
6.4 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_GEOM_BREP_ATTRIBUTE_HPP
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#define ANTKEEPER_GEOM_BREP_ATTRIBUTE_HPP
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#include <engine/utility/hash/fnv1a.hpp>
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#include <memory>
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#include <vector>
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namespace geom {
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/**
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* Abstract base class for B-rep element attributes.
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*/
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class brep_attribute_base
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{
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public:
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/// Returns the name of the attribute.
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[[nodiscard]] inline constexpr hash::fnv1a32_t name() const noexcept
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{
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return m_name;
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}
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protected:
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inline explicit constexpr brep_attribute_base(hash::fnv1a32_t name) noexcept:
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m_name(name)
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{}
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private:
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friend class brep_attribute_map;
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template <class T>
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friend class brep_element_container;
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/**
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* Erases the attribute value of an element with the given index.
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*
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* @param i Index of an element.
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*/
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virtual void erase(std::size_t i) = 0;
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/**
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* Appends a new attribute value to the end of the container.
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*/
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virtual void emplace_back() = 0;
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/// Returns a copy of this attribute.
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[[nodiscard]] virtual std::unique_ptr<brep_attribute_base> clone() const = 0;
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hash::fnv1a32_t m_name;
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};
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/**
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* Per-element B-rep data.
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*
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* @tparam T Data type.
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*/
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template <class T>
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class brep_attribute: public brep_attribute_base
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{
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public:
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using value_type = T;
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using reference = value_type&;
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using const_reference = const value_type&;
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using pointer = value_type*;
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using const_pointer = const value_type*;
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using iterator = std::vector<value_type>::iterator;
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using const_iterator = std::vector<value_type>::const_iterator;
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using reverse_iterator = std::vector<value_type>::reverse_iterator;
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using const_reverse_iterator = std::vector<value_type>::const_reverse_iterator;
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/**
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* Constructs an attribute.
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*
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* @param name Name of the attribute.
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* @param element_count Number of elements.
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*/
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brep_attribute(hash::fnv1a32_t name, std::size_t element_count):
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brep_attribute_base(name),
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m_values(element_count)
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{}
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/// @name Attribute access
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/// @{
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/**
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* Returns a reference to the attribute value of an element.
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*
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* @param i Index of an element.
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*
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* @return Reference to the attribute value of the element at index @p i.
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*/
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/// @{
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[[nodiscard]] inline constexpr const_reference operator[](std::size_t i) const
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{
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return m_values[i];
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}
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[[nodiscard]] inline constexpr reference operator[](std::size_t i)
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{
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return m_values[i];
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}
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/// @}
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/// Returns a reference to the attribute value of the first element.
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/// @{
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[[nodiscard]] inline constexpr const_reference front() const
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{
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return m_values.front();
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}
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[[nodiscard]] inline constexpr reference front()
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{
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return m_values.front();
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}
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/// @}
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/// Returns a reference to the attribute value of the last element.
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/// @{
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[[nodiscard]] inline constexpr const_reference back() const
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{
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return m_values.back();
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}
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[[nodiscard]] inline constexpr reference back()
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{
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return m_values.back();
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}
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/// @}
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/// Returns a pointer to the underlying array serving as attribute value storage.
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/// @{
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[[nodiscard]] inline constexpr const value_type* data() const noexcept
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{
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return m_values.data();
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}
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[[nodiscard]] inline constexpr value_type* data() noexcept
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{
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return m_values.data();
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}
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/// @}
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/// @}
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/// @name Iterators
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/// @{
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/// Returns an iterator to the attribute value of the first element.
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/// @{
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[[nodiscard]] inline constexpr const_iterator begin() const noexcept
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{
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return m_values.begin();
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}
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[[nodiscard]] inline constexpr iterator begin() noexcept
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{
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return m_values.begin();
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}
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[[nodiscard]] inline constexpr const_iterator cbegin() const noexcept
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{
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return m_values.begin();
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}
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/// @}
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/// Returns an iterator to the attribute value of the element following the last element.
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/// @{
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[[nodiscard]] inline constexpr const_iterator end() const noexcept
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{
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return m_values.end();
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}
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[[nodiscard]] inline constexpr iterator end() noexcept
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{
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return m_values.end();
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}
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[[nodiscard]] inline constexpr const_iterator cend() const noexcept
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{
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return m_values.end();
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}
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/// @}
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/// Returns a reverse iterator to the attribute value of the first element of the reversed container.
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/// @{
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[[nodiscard]] inline constexpr const_reverse_iterator rbegin() const noexcept
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{
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return m_values.rbegin();
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}
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[[nodiscard]] inline constexpr reverse_iterator rbegin() noexcept
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{
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return m_values.rbegin();
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}
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[[nodiscard]] inline constexpr const_reverse_iterator crbegin() const noexcept
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{
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return m_values.rbegin();
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}
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/// @}
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/// Returns a reverse iterator to the attribute value of the element following the last element of the reversed container.
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/// @{
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[[nodiscard]] inline constexpr const_reverse_iterator rend() const noexcept
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{
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return m_values.rend();
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}
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[[nodiscard]] inline constexpr reverse_iterator rend() noexcept
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{
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return m_values.rend();
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}
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[[nodiscard]] inline constexpr const_reverse_iterator crend() const noexcept
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{
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return m_values.rend();
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}
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/// @}
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/// @}
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/// @name Capacity
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/// @{
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/// Returns `true` if the container is empty, `false` otherwise.
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[[nodiscard]] inline constexpr bool empty() const noexcept
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{
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return m_values.empty();
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}
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/// Returns the number of attribute values in the container.
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[[nodiscard]] inline constexpr std::size_t size() const noexcept
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{
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return m_values.size();
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}
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/// @}
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private:
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void erase(std::size_t i) override
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{
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m_values[i] = std::move(m_values.back());
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m_values.pop_back();
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}
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void emplace_back() override
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{
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m_values.emplace_back();
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}
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[[nodiscard]] std::unique_ptr<brep_attribute_base> clone() const override
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{
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auto copy = std::make_unique<brep_attribute<T>>(name(), 0);
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copy->m_values = m_values;
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return copy;
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}
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std::vector<value_type> m_values;
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};
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} // namespace geom
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#endif // ANTKEEPER_GEOM_BREP_ATTRIBUTE_HPP
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