Boostライブラリで配列になっているfloat型を読み込みたい

提示コードですが.jsonファイルの"vertices"の二次元float配列を読み込んでvector型にでも格納したいのですがどうすればいいのでしょうか？

参考サイト: https://www.boost.org/doc/libs/1_74_0/libs/property_map/doc/property_map.html

.json

{
	"version":1,
	"vertexformat":"PosNormTex",
	"shader":"BasicMesh",
	"textures":[
		"Assets/Cube.png"
	],
	"specularPower":100.0,
	"vertices":[
		[-0.5,-0.5,-0.5,0,0,-1,0,0],
		[0.5,-0.5,-0.5,0,0,-1,1,0],
		[-0.5,0.5,-0.5,0,0,-1,0,-1],
		[0.5,0.5,-0.5,0,0,-1,1,-1],
		[-0.5,0.5,0.5,0,1,0,0,-1],
		[0.5,0.5,0.5,0,1,0,1,-1],
		[-0.5,-0.5,0.5,0,0,1,0,0],
		[0.5,-0.5,0.5,0,0,1,1,0],
		[-0.5,0.5,-0.5,0,0,-1,0,-1],
		[0.5,-0.5,-0.5,0,0,-1,1,0],
		[-0.5,0.5,-0.5,0,1,0,0,-1],
		[0.5,0.5,-0.5,0,1,0,1,-1],
		[-0.5,0.5,0.5,0,1,0,0,-1],
		[-0.5,0.5,0.5,0,0,1,0,-1],
		[0.5,0.5,0.5,0,0,1,1,-1],
		[-0.5,-0.5,0.5,0,0,1,0,0],
		[-0.5,-0.5,0.5,0,-1,0,0,0],
		[0.5,-0.5,0.5,0,-1,0,1,0],
		[-0.5,-0.5,-0.5,0,-1,0,0,0],
		[0.5,-0.5,-0.5,0,-1,0,1,0],
		[0.5,-0.5,-0.5,1,0,0,1,0],
		[0.5,-0.5,0.5,1,0,0,1,0],
		[0.5,0.5,-0.5,1,0,0,1,-1],
		[0.5,0.5,0.5,1,0,0,1,-1],
		[-0.5,-0.5,0.5,-1,0,0,0,0],
		[-0.5,-0.5,-0.5,-1,0,0,0,0],
		[-0.5,0.5,0.5,-1,0,0,0,-1],
		[-0.5,0.5,-0.5,-1,0,0,0,-1]
	],
	"indices":[
		[2,1,0],
		[3,9,8],
		[4,11,10],
		[5,11,12],
		[6,14,13],
		[7,14,15],
		[18,17,16],
		[19,17,18],
		[22,21,20],
		[23,21,22],
		[26,25,24],
		[27,25,26]
	]
}

ソースファイル

#include "Game.hpp"
#include "Debug.hpp"
#include "Windows.h"

#include <string>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/foreach.hpp>
#include <boost/optional.hpp>

#include <glew/include/GL/glew.h>
#include "GL/gl.h"

#include <fstream>

using namespace boost::property_tree;

Game::Game()
{
	
}

bool Game::Initialization(HDC dc)
{
   mDeviceContext = dc;






    std::string str = "Assets/Cube.json";


    //メッシュを読み込む
    boost::property_tree::ptree pt;
    boost::property_tree::read_json(str,pt);

   BOOST_FOREACH(const ptree::value_type& child,pt.get_child("Cube.vertices"))
   {
      // printf("ああああ\n");
       const ptree& info = child.second;

       boost::optional<float> id = info.get_optional<fint>("id");
       
           std::cout <<"id: "<<id.get() <<std::endl;
       
   }




    return true;
}