// not good at using namespaces, bear with me

#include <vector>
#include <string>
using namespace std;

// struct to hold vertex position
struct Vertex {
	float pos[3];
};

// struct to hold normal vectors
struct Normal {
	float dir[3];
};

// struct to hold material information
struct Material {
	int idx;
	string name;
	float ambient[4];
	float specular[4];
	float diffuse[4];
};

// meta struct for each individual face, pointers to its set of
// vertices, normals and material structs
struct Face {
	vector<Vertex*> vertices;
	vector<Normal*> normals;
	Material* mtl;
};

// class to load and handle .obj and .mtl parsing and face data construction
class ObjectLoader 
{
public:
	void load_obj(string filename);
	void load_mtl(string filename);
	
	vector<Face> faces;

protected:
	Material* get_mtl_ptr(string mtl_name);

	vector<Vertex> vertices;
	vector<Normal> normals;
	vector<Material> mtls;
};