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#pragma once
#ifndef yyFlexLexer
# define yyFlexLexer objbaseFlexLexer
# include <FlexLexer.h>
#endif
#include <filesystem>
#include <fstream>
#include <glm/glm.hpp>
#include <map>
#include <memory>
#include <vector>
class Mesh;
class Vertex;
class ObjParser : yyFlexLexer {
public:
explicit ObjParser(const std::filesystem::path & fileName);
explicit ObjParser(std::unique_ptr<std::istream> in);
int yylex() override;
std::vector<glm::vec4> vertices;
std::vector<glm::vec3> texCoords;
std::vector<glm::vec3> normals;
using FaceElement = glm::vec<3, unsigned int>;
using Face = std::vector<FaceElement>;
using Faces = std::vector<Face>;
using Object = std::pair<std::string, Faces>;
std::vector<Object> objects;
glm::length_t axis {0};
using NamedMeshesData = std::map<std::string, std::pair<std::vector<Vertex>, std::vector<unsigned int>>>;
[[nodiscard]] NamedMeshesData createMeshData() const;
using NamedMeshes = std::map<std::string, std::shared_ptr<const Mesh>>;
[[nodiscard]] NamedMeshes createMeshes() const;
};
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