#ifndef __RES_MDL_MODEL_H__#define __RES_MDL_MODEL_H__//----------------------------------------------------------------------------////res_mdl_model.h////Copyright © Rishi Ramraj, 2004// Model loading/displaying library//----------------------------------------------------------------------------//··········································································////    header :: Inclusions//··········································································//#include "res_img_image.h"//··········································································////    header :: Definitions//··········································································////··········································································////    header :: Structures//··········································································////··········································································////    header :: Class Defs//··········································································//// Class design philosophy// These classes are designed to operate in two modes; read mode and write mode.// To use write mode, use the init function to initalize the respective class// with the desired values. Behaviour is undefined if both modes are used together. // The read, write, or init functions should only be called once. Both read and // write functions append directly onto the file passed.class res_mdl_vertex{public:	res_mdl_vertex();	~res_mdl_vertex();	// sends the vector data to OpenGL	void draw(void);	// reads vector data from the FILE struct passed	bool read(void * file);		bool init(float v_x, float v_y, float v_z, 			  float u, float v);	// writes vector data to the FILE struct passed	bool write(void * file);private:	// vertex data	float vertex[3];	// texture coordinates	float tex_u;	float tex_v;};class res_mdl_normal{public:	res_mdl_normal();	~res_mdl_normal();	// sends the normal data to OpenGL	void draw(void);	// reads normal data from the FILE struct passed	bool read(void * file);	bool init(float n_x, float n_y, float n_z);	// writes normal data to the FILE struct passed	bool write(void * file);private:	// normal data	float normal[3];};class res_mdl_triangle{public:	res_mdl_triangle();	~res_mdl_triangle();	// sends the triangle data to OpenGL	void draw( res_mdl_vertex * vertices, res_mdl_normal * normals);	// reads vector data from the FILE struct passed	bool read(void * file);	bool init(int v_1, int v_2, int v_3, 		      int n_1, int n_2, int n_3);	// writes vector data to the FILE struct passed	bool write(void * file);private:	// triangle data	int vertex_indices[3];	int normal_indices[3];};class res_mdl_material{public:	res_mdl_material();	~res_mdl_material();	// sends the material data to OpenGL	void draw(void);	// reads material data from the FILE struct passed	bool read(void * file);	// Note that path is duplicated in memory	bool init(float al_x, float al_y, float al_z, 		      float dl_x, float dl_y, float dl_z,			  float sl_x, float sl_y, float sl_z,			  float el_x, float el_y, float el_z,			  const char * path);	// writes material data to the FILE struct passed	bool write(void * file);private:	// material data	float ambiant_light[4];	float diffuse_light[4];	float specular_light[4];	float emissive_light[4];	res_img_image texture;	// path is only used for writing	// path is stored to resolve an issue that arises with the write function. 	// The class is responsible for writing the relative path of the texture to	// disk, but the path does not need to be stored when the class is used	// under read mode circumstances.	char * path;};class res_mdl_mesh{public:	res_mdl_mesh();	~res_mdl_mesh();	// sends the mesh data to OpenGL	void draw(void);	// reads mesh data from the FILE struct passed	bool read(void * file);	// Note that the pointers are not duplicated in memory.	// They should be allocated using new. The mesh class	// will delete the data after it goes out of scope.	bool init(int mi,			  int n_verts, res_mdl_vertex	* verts,			  int n_norms, res_mdl_normal	* norms,			  int n_faces, res_mdl_triangle	* faces);	// writes material data to the FILE struct passed	bool write(void * file);private:	// mesh data	int material_index;	int num_vertices;	res_mdl_vertex * vertices;	int num_normals;	res_mdl_normal * normals;	int num_triangles;	res_mdl_triangle * triangles;};class res_mdl_model{public:	res_mdl_model();	~res_mdl_model();	// sends the mesh data to OpenGL as a display list	void draw(void);	// reads mesh data from the FILE struct passed. Once the model	// has been read, it is sent to OpenGL as a display list.	bool read(void * file);	// Note that the pointers are not duplicated in memory.	// They should be allocated using new. The model class	// will delete the data after it goes out of scope.	bool init(int n_mats  , res_mdl_material * mats,			  int n_meshes, res_mdl_mesh	 * meshes);	// writes material data to the FILE struct passed	bool write(void * file);private:	// model data	int num_materials;	res_mdl_material * materials;	int num_meshes;	res_mdl_mesh * meshes;	unsigned int display_list;};//··········································································////    header :: Function Defs//··········································································////----------------------------------------------------------------------------//res_mdl_model.h//Copyright © Rishi Ramraj, 2004//----------------------------------------------------------------------------#endif //__RES_MDL_MODEL_H__

struct mdl_triangle{   float point_one[3];   float point_two[3];   float point_three[3];};

/*   -----------                           \        / \                           \      /   \                           \    / <---\----- shared edge          \  /       \                           \/_________\                   */

/*   _______                |    /|   |   / |   |  /  |   | /   |   |/____|*/