/*
 * CS5600 University of Utah
 * Charles McGarvey
 * mcgarvey@eng.utah.edu
 */

#ifndef _MODEL_H_
#define _MODEL_H_

#include "color.h"
#include "common.h"
#include "list.h"
#include "mat.h"


#define MODEL_TYPE_RAW (1)
#define MODEL_TYPE_OBJ (2)


/*
 * A model is a group of geometry and its attributes.
 */
typedef struct model model_t;


/*
 * Allocate and load a model from a file.  The file format of the model will
 * be inferred from the filename extension.
 */
model_t* model_alloc(const char* filename);

/*
 * Allocate and load a model from a file.  You must explicitly pass the file
 * format of the model data.
 */
model_t* model_alloc2(const char* filename, int type);

/*
 * Destroy a model, freeing up its memory.
 */
void model_destroy(model_t* m);


/*
 * Get the model's geometry as a list of triangles.
 */
const list_t* model_geometry(const model_t* m);

/*
 * Get the number of triangles that make up the model.
 */
int model_size(const model_t* m);

/*
 * Get a string representation for the model (i.e. a filename).
 */
const char* model_name(const model_t* m);

/*
 * Get the color of the specular light property of the model.
 */
color_t model_specular(const model_t* m);

/*
 * Get the level of shininess of a model for use in lighting calculations.
 */
scal_t model_shininess(const model_t* m);

/*
 * Get the current transformation of the model.  This can be changed by a call
 * to model_transform.
 */
void model_transformation(const model_t* m, mat_t* transform);

/*
 * Get the color of the texture at the given uv coordinates.
 */
color_t model_tcolor(const model_t* m, vec_t pt);


/*
 * Post-multiply a transformation matrix to the internal matrix representing
 * the model's location and orientation.
 */
void model_transform(model_t* m, const mat_t* transform);

/*
 * Set the material attributes of the model.
 */
void model_material(model_t* m, color_t specular, scal_t shininess);

/*
 * Set the texture of the model.
 */
void model_texture(model_t* m, const void* p);


#endif // _MODEL_H_