!!ARBfp1.0

PARAM	amb			= state.material.ambient;
PARAM	diff		= state.lightprod[0].diffuse;
PARAM	spec		= state.lightprod[0].specular;
PARAM	shin		= state.material.shininess;
PARAM	em			= state.material.emission;

PARAM	gray		= { 0.2125, 0.7154, 0.0721, 1.0 };

#ATTRIB	normal		= fragment.texcoord[0];
ATTRIB	n			= fragment.texcoord[0];
ATTRIB	light		= fragment.texcoord[1];
ATTRIB	view		= fragment.texcoord[2];

TEMP	tmp, l, v, r, coeff, col;
#TEMP	n;

# normalize normal
#DP3			tmp.a, normal, normal;
#RSQ			tmp.a, tmp.a;
#MUL			n.rgb, normal, tmp.a;

# normalize light vector
DP3			tmp.a, light, light;
RSQ			tmp.a, tmp.a;
MUL			l.rgb, light, tmp.a;

# normalize view vector
DP3			tmp.a, view, view;
RSQ			tmp.a, tmp.a;
MUL			v.rgb, view, tmp.a;

# calc reflection vector 2(L.N)N - L
DP3			tmp, l, n;
ADD			tmp.a, tmp.a, tmp.a;
MAD			r.rgb, tmp.a, n, -l;

# calc diffuse term
DP3_SAT		coeff.a, n, l;

# calc specular term
DP3_SAT		coeff.r, r, v;
POW			coeff.r, coeff.r, shin.r;

# accumulate
MAD			tmp, coeff.a, diff, amb;
MAD_SAT		col.rgb, coeff.r, spec, tmp;
ADD			col.rgb, col, em;
MOV			result.color.a, 1.0;

# grayscale
DP3			result.color.rgb, col, gray;

END