#ifndef loadobj_h
 #define loadobj_h
 
 #ifdef __APPLE__
 	#include <OpenGL/gl3.h>
 #else
 	#if defined(_WIN32)
 		#include "glew.h"
 	#endif
 	#include <GL/gl.h>
 #endif
 
 #include "VectorUtils3.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 // How many error messages do you want before it stops?
 #define NUM_DRAWMODEL_ERROR 8
 
 typedef struct Mtl
 {
 	char newmtl[255];
 	
 	vec3 Ka, Kd, Ks, Ke;
 	// I have also seen vec3's named Tf and a float called Ni in one file. What is that?
 	// Tf = transmission filter
 	// Ni = optical_density
 	GLfloat Ns, Tr, d; // Tr = 1-d
 	int illum;	// illumination model 0..10
 	char map_Ka[255], map_Kd[255], map_Ks[255], map_Ke[255], map_Ns[255], map_d[255], map_bump[255];
 	
 	// NEW for texture support
 	int texidKa, texidKd, texidKs, texidKe, texidNs, texid_d, texid_bump; // References to loaded textures!
 	// refl -type not supported -o for options? A whole bunch.
 	// Extensions for physically based rendering not supported
 } Mtl, *MtlPtr, **MtlHandle;
 
 typedef struct
 {
   vec3* vertexArray;
   vec3* normalArray;
   vec2* texCoordArray;
   vec3* colorArray; // Rarely used
   GLuint* indexArray;
   int numVertices;
   int numIndices;
   
   // Space for saving VBO and VAO IDs
   GLuint vao; // VAO
   GLuint vb, ib, nb, tb; // VBOs
   
   Mtl *material;
 } Model;
 
 // Basic model loading
 #define LoadModelPlus LoadModel
 Model* LoadModel(const char* name); // Load OBJ as single Model
 Model** LoadModelSet(const char* name);  // Multi-part OBJ!
 
 // Drawing models
 void DrawModel(Model *m, GLuint program, const char* vertexVariableName, const char* normalVariableName, const char* texCoordVariableName);
 void DrawWireframeModel(Model *m, GLuint program, const char* vertexVariableName, const char* normalVariableName, const char* texCoordVariableName);
 
 // Utility functions that you may need if you want to modify the model.
 
 Model* LoadDataToModel(
 			vec3 *vertices,
 			vec3 *normals,
 			vec2 *texCoords,
 			vec3 *colors,
 			GLuint *indices,
 			int numVert,
 			int numInd);
 void ReloadModelData(Model *m);
 
 void CenterModel(Model *m);
 void ScaleModel(Model *m, float sx, float sy, float sz);
 void DisposeModel(Model *m);
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif