IO_OBJ.hpp

#pragma once

#include "GeometryTypes.hpp"

#include <iostream>
#include <string>
#include <vector>
#include <map>

class ObjFileDetail;

///////////////////////////////////////////////////////////////////////////////////////////////////
// Functions for reading and writing OBJ Files.
// Common in the 3D modeling world, each file can contain multiple meshes which you can look up by
// index or name. Note that normals, colors, textures, etc are all ignored (except if caching
// normals, then they are used).
///////////////////////////////////////////////////////////////////////////////////////////////////
class ObjFile
{
    bool _as_objects;
    ObjFileDetail* detail;

public:
    ObjFile(const char *filename, bool as_objects = false);
    ObjFile(std::istream& in, bool as_objects = false);
    ~ObjFile();

    inline const bool as_objects() const { return this->_as_objects; }
    inline void set_as_objects(bool x) { this->_as_objects = x; }

    const std::vector<std::string> names() const;
    size_t size() const;

    Polyhedron3* operator[](const std::string&) const; // need to "delete" return value
    Polyhedron3* operator[](size_t) const;
};


void write_obj_file(const char* filename, const std::map<std::string, Polyhedron3*>& P, bool as_objects = false,
                    const std::string& matfile = "", const std::vector<std::string>& mtls = std::vector<std::string>());
void write_obj_file(const char* filename, const std::vector<Polyhedron3*>& P, bool as_objects = false,
                    const std::string& matfile = "", const std::vector<std::string>& mtls = std::vector<std::string>());
void write_obj_file(std::ostream &out, const std::map<std::string, Polyhedron3*>& P, size_t& off, bool as_objects = false,
                    const std::string& matfile = "", const std::vector<std::string>& mtls = std::vector<std::string>());
void write_obj_file(std::ostream &out, const std::vector<Polyhedron3*>& P, size_t& off, bool as_objects = false,
                    const std::string& matfile = "", const std::vector<std::string>& mtls = std::vector<std::string>());
void write_obj_file(const char* filename, const Polyhedron3* P);
void write_obj(std::ostream &out, const Polyhedron3* P);
void write_obj(std::ostream &out, const Polyhedron3* P, size_t& off);