116 lines
2.5 KiB
C++
Executable File
116 lines
2.5 KiB
C++
Executable File
#pragma once
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#include <filesystem>
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#include <system_error>
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#include <string_view>
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#include "assets/data/mesh_data.hpp"
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#include "assets/data_stores.hpp"
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#include "assets/path_id_lookups.hpp"
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#include <set>
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namespace assets::obj_loader_error
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{
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enum class codes {
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ok = 0,
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cannot_open_file,
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malformed_vertex,
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malformed_texture_coordinate,
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malformed_normal,
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malformed_face,
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face_index_out_of_range,
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unknown_line_begin,
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use_material_without_material_library,
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unknown_material_name
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};
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} // namespace obj_loader_error
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namespace assets
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{
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struct obj_loader
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{
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static constexpr auto name = std::string_view("obj");
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using data_type = mesh_data;
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using store_type = mesh_store;
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using lookup_type = mesh_id_lookup;
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// TODO port this mess to the new interface
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[[nodiscard]] std::error_code prefetch(
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path_id_lookups& lookups
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);
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[[nodiscard]] std::error_code load(
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path_id_lookups& lookups,
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data_stores& stores,
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bool pedantic = false
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);
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protected:
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struct indexed_vertex_type
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{
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z3d::index_triangle vertex;
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z3d::vertex_index buffer_index;
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friend auto operator<=>(const indexed_vertex_type& a, const indexed_vertex_type& b) {
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return a.vertex <=> b.vertex;
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}
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bool operator==(const indexed_vertex_type& other) const noexcept {
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return other.vertex == vertex;
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}
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};
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class parser_context
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{
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public:
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parser_context(
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const texture_id_lookup& texture_id_lookup,
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material_id_lookup& material_id_lookup,
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material_store& material_store,
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store_type& store
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);
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void operator()(lookup_type::const_pointer entry) noexcept;
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protected:
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void reset();
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[[nodiscard]] std::optional<texture_id> fetch_texture_id(
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const std::filesystem::path& mtl_dir,
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std::string_view filename,
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std::string_view texture_type_name
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);
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private:
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const path_id_lookups* m_id_lookups;
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data_stores* m_stores;
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data_type m_buffer{};
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data_type m_read_buffer{};
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std::set<indexed_vertex_type> vertex_ids{};
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};
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static void find_materials(
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std::span<char> buffer,
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std::filesystem::path& path_buffer,
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const std::filesystem::path& base_directory,
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std::ifstream& in,
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ztu::string_list& material_filenames
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);
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[[nodiscard]] static std::error_code obj_loader::parse_file(
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dynamic_mesh_buffer& read_buffer,
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dynamic_mesh_buffer& mesh_buffer,
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std::filesystem::path& path_buffer,
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const std::filesystem::path& base_directory,
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std::set<indexed_vertex_type>& vertex_ids,
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std::ifstream& in,
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prefetch_lookup& id_lookup,
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dynamic_shader_source_store& store,
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bool pedantic
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);
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};
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}
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