/* Lighting coefficients */

struct Light {
	float	ra;
	float	rd;
	float	rs;
	float	ga;
	float	gd;
	float	gs;
	float	ba;
	float	bd;
	float	bs;
	float	aa;
	float	ad;
	float	as;
	float	nx, ny, nz;
	float	bx, by, bz;	/* bi sector */
	float	n;
};

#define	magnitude(x,y,z)	sqrt((x)*(x) + (y)*(y) + (z)*(z))