/*
 *  CG Experiment Headers
 *	1996/10 KAMEDA Yoshinari
 */

#define	AX 0
#define	AY 1
#define	AZ 2
#define	AA 3

#define	AR 0
#define	AG 1
#define	AB 2

#define D_PARA_LIGHT 0
#define D_POINT_LIGHT 1

#define D_DIFF_LIGHT 0
#define D_SPEC_LIGHT 1
#define D_AMBI_LIGHT 2

#define Z_LOWEST ((float)-3.40282346638528860e+38)
#define MBS 256


typedef unsigned char   uchar;
typedef double	Matrix[4][4];
typedef double	APos[4];
typedef double	ACol[4];
typedef int	Tri[3];

typedef struct {
    int		w;	/* width  */
    int		h;	/* height */
    uchar	*b;	/* pointer to the PPM image buffer */
    double	*z;	/* pointer to the z buffer */
} ImgBuf;

typedef struct {
    APos	o;	/* Original Euclid Coordinate (3D)*/
    APos	p;	/* Projected Euclid Coordinate (2D)*/
} Vert;

typedef struct {
    ACol	i;	/* Light Intensity in RGB*/
    APos	d;	/* Light Direction (Parallel Source) */
    APos	p;	/* Light Source Location (Point Light) */
    int		pp;	/* 0:parallel, 1:point  */
    int		s;	/* 0:DIFFUSE, 1:SPECULAR, 2:AMBIENT */
} Lelem;

typedef struct {
    ACol	diff;	/* Diffuse  in RGB */
    ACol	spec;	/* Specular in RGB */
    ACol	ambi;	/* Ambient  in RGB */
    double	shine;	/* Shiness */
} Oelem;

typedef struct {
    APos	p;	/* Camera Position */
    APos	d;	/* Direction to look at */
    double	f;	/* Focus */
} Celem;

typedef struct {
    APos	*v;	/* Vertex List */
    Tri		*t;	/* Triangle list */
    int		nv;	/* number of vertice */
    int		nt;	/* number of triangles */
} Selem;