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//
// Copyright 2012-2013, Syoyo Fujita.
//
// Licensed under 2-clause BSD liecense.
//
#ifndef _TINY_OBJ_LOADER_H
#define _TINY_OBJ_LOADER_H
#include <string>
#include <vector>
#include <map>
struct CommonFileIOInterface;
namespace tinyobj
{
struct vertex_index_t
{
int v_idx, vt_idx, vn_idx;
vertex_index_t() : v_idx(-1), vt_idx(-1), vn_idx(-1) {}
explicit vertex_index_t(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx) {}
vertex_index_t(int vidx, int vtidx, int vnidx)
: v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx) {}
};
typedef std::vector<vertex_index_t> face_t;
typedef struct
{
std::string name;
float ambient[3];
float diffuse[3];
float specular[3];
float transmittance[3];
float emission[3];
float shininess;
float transparency; // 1 == opaque; 0 == fully transparent
std::string ambient_texname; // map_Ka
std::string diffuse_texname; // map_Kd
std::string specular_texname; // map_Ks
std::string normal_texname;
std::map<std::string, std::string> unknown_parameter;
} material_t;
// Index struct to support different indices for vtx/normal/texcoord.
// -1 means not used.
typedef struct
{
int vertex_index;
int normal_index;
int texcoord_index;
} index_t;
typedef struct
{
std::vector<index_t> indices;
} mesh_t;
typedef struct
{
std::string name;
material_t material;
mesh_t mesh;
} shape_t;
// Vertex attributes
struct attrib_t
{
std::vector<float> vertices; // 'v'(xyz)
std::vector<float> normals; // 'vn'
std::vector<float> texcoords; // 'vt'(uv)
attrib_t() {}
};
/// Loads .obj from a file.
/// 'shapes' will be filled with parsed shape data
/// The function returns error string.
/// Returns empty string when loading .obj success.
/// 'mtl_basepath' is optional, and used for base path for .mtl file.
#ifdef USE_STREAM
std::string LoadObj(
attrib_t& attrib,
std::vector<shape_t>& shapes, // [output]
const char* filename,
const char* mtl_basepath = NULL);
#else
std::string
LoadObj(
attrib_t& attrib,
std::vector<shape_t>& shapes,
const char* filename,
const char* mtl_basepath,
CommonFileIOInterface* fileIO);
#endif
}; // namespace tinyobj
#endif // _TINY_OBJ_LOADER_H
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