/*
 * stl.h
 * Author: Josh Holtrop
 * Date: 2007-06-02
 * From information at http://en.wikipedia.org/wiki/STL_(file_format)
 */

#ifdef __cplusplus
extern "C" {
#endif

/* macros */
#define STL_HEADER_LENGTH 80
#define stl_num_faces(stlp) ((stlp)->n_faces)
#define stl_face(stlp,facenum) ((stlp)->faces[(facenum)])
#define stl_attr_color_valid(attr) ((attr) & 0x8000)
#define stl_attr_color_r(attr) (((attr) & 0x7C00) >> 7)
#define stl_attr_color_g(attr) (((attr) & 0x03E0) >> 2)
#define stl_attr_color_b(attr) (((attr) & 0x001F) << 3)


/* types */
typedef struct stl_face_s
{
	float		normal[3];
	float		vertices[3][3];
	unsigned short	attribute;
} stl_face_t;

typedef struct stl_s
{
	char		header[STL_HEADER_LENGTH];
	unsigned int	n_faces;
	stl_face_t	faces[1];
} stl_t;


/* functions */
stl_t *	stl_load(const char * filename);


#ifdef __cplusplus
}
#endif