--- ray/src/px/normpat.csh	1991/01/04 16:54:25	1.3
+++ ray/src/px/normpat.csh	1991/01/05 08:38:50	1.6
@@ -2,8 +2,11 @@
 # SCCSid "$SunId$ LBL"
 #
 # Normalize a pattern for tiling (-b option blends edges) by removing
-# lowest frequencies from image and reducing to standard size (-r option)
+# lowest frequencies from image (-f option) and reducing to
+# standard size (-r option)
 #
+set ha=$0
+set ha=$ha:t
 set pf="pfilt -e 2"
 while ($#argv > 0)
 	switch ($argv[1])
@@ -11,7 +14,12 @@ while ($#argv > 0)
 		shift argv
 		set pf="$pf -x $argv[1] -y $argv[1] -p 1"
 		breaksw
+	case -f:
+		set ha="$ha -f"
+		set dofsub
+		breaksw
 	case -b:
+		set ha="$ha -b"
 		set blend
 		breaksw
 	case -v:
@@ -29,13 +37,41 @@ dofiles:
 onintr quit
 set td=/usr/tmp/np$$
 mkdir $td
-set ha=$0
-set ha=$ha:t
-if ( $?blend ) then
-	set ha="$ha -b"
-else
-	mknod $td/hf p
-endif
+cat > $td/coef.fmt << '_EOF_'
+   rm=${  $25   };    gm=${  $26   };    bm=${  $27   };
+  rcx=${   $1   };   gcx=${   $9   };   bcx=${  $17   };
+  rcy=${   $2   };   gcy=${  $10   };   bcy=${  $18   };
+  rsx=${   $3   };   gsx=${  $11   };   bsx=${  $19   };
+  rsy=${   $4   };   gsy=${  $12   };   bsy=${  $20   };
+rcxcy=${   $5   }; gcxcy=${  $13   }; bcxcy=${  $21   };
+rcxsy=${   $6   }; gcxsy=${  $14   }; bcxsy=${  $22   };
+rsxcy=${   $7   }; gsxcy=${  $15   }; bsxcy=${  $23   };
+rsxsy=${   $8   }; gsxsy=${  $16   }; bsxsy=${  $24   };
+'_EOF_'
+cat > $td/coef.cal << '_EOF_'
+$1=$3*2*cx; $2=$3*2*cy; $3=$3*2*sx; $4=$3*2*sy;
+$5=$3*4*cx*cy; $6=$3*4*cx*sy; $7=$3*4*sx*cy; $8=$3*4*sx*sy;
+$9=$4*2*cx; $10=$4*2*cy; $11=$4*2*sx; $12=$4*2*sy;
+$13=$4*4*cx*cy; $14=$4*4*cx*sy; $15=$4*4*sx*cy; $16=$4*4*sx*sy;
+$17=$5*2*cx; $18=$5*2*cy; $19=$5*2*sx; $20=$5*2*sy;
+$21=$5*4*cx*cy; $22=$5*4*cx*sy; $23=$5*4*sx*cy; $24=$5*4*sx*sy;
+$25=$3; $26=$4; $27=$5;
+cx=cos(wx); cy=cos(wy);
+sx=sin(wx); sy=sin(wy);
+wx=2*PI*($1+.5)/xres; wy=2*PI*($2+.5)/yres;
+'_EOF_'
+cat > $td/fsub.cal << '_EOF_'
+ro=ri(1)*rm/(rm+rcx*cx+rcy*cy+rsx*sx+rsy*sy
+		+rcxcy*cx*cy+rcxsy*cx*sy+rsxcy*sx*cy+rsxsy*sx*sy);
+go=gi(1)*gm/(gm+gcx*cx+gcy*cy+gsx*sx+gsy*sy
+		+gcxcy*cx*cy+gcxsy*cx*sy+gsxcy*sx*cy+gsxsy*sx*sy);
+bo=bi(1)*bm/(bm+bcx*cx+bcy*cy+bsx*sx+bsy*sy
+		+bcxcy*cx*cy+bcxsy*cx*sy+bsxcy*sx*cy+bsxsy*sx*sy);
+cx=cos(wx); cy=cos(wy);
+sx=sin(wx); sy=sin(wy);
+wx=2*PI*(x+.5)/xres; wy=2*PI*(y+.5)/yres;
+PI=3.14159265358979323846;
+'_EOF_'
 foreach f ($*)
 	if ( $?verb ) then
 		echo $f\:
@@ -51,28 +87,25 @@ w
 q
 _EOF_
 	set resolu=`getinfo -d < $td/pf | sed 's/-Y \([0-9]*\) +X \([0-9]*\)/\2 \1/'`
+	if ( ! $?dofsub ) then
+		mv $td/pf $td/hf
+		goto donefsub
+	endif
 	if ( $?verb ) then
 		echo computing Fourier coefficients...
 	endif
-	set coef=`pfilt -1 -x 32 -y 32 $td/pf | pvalue -h -b | rcalc -e '$1=2*$3*cos(wx);$2=2*$3*cos(wy);$3=2*$3*sin(wx);$4=2*$3*sin(wy);$5=4*$3*cos(wx)*cos(wy);$6=4*$3*cos(wx)*sin(wy);$7=4*$3*sin(wx)*cos(wy);$8=4*$3*sin(wx)*sin(wy);' -e 'wx=2*PI/32*$1;wy=2*PI/32*$2' | total -m`
+	pfilt -1 -x 32 -y 32 $td/pf | pvalue -h \
+		| rcalc -f $td/coef.cal -e 'xres=32;yres=32' \
+		| total -m | rcalc -o $td/coef.fmt \
+		> $td/coef
 	if ( $?verb ) then
-		echo "cosx cosy sinx siny"
-		echo $coef[1-4]
-		echo "cosx*cosy cosx*siny sinx*cosy sinx*siny"
-		echo $coef[5-8]
+		cat $td/coef
 		echo removing low frequencies...
 	endif
-	if ( ! $?blend ) then
-		( getinfo - < $td/hf >> $f & ) > /dev/null
-	endif
-	pcomb -e 'ro=f*ri(1);go=f*gi(1);bo=f*bi(1);f=(i-fc-fs-f0-f1)/i' \
-		-e 'i=.263*ri(1)+.655*gi(1)+.082*bi(1)' \
-		-e "fc=$coef[1]*cos(wx)+$coef[2]*cos(wy)" \
-		-e "fs=$coef[3]*sin(wx)+$coef[4]*sin(wy)" \
-		-e "f0=$coef[5]*cos(wx)*cos(wy)+$coef[6]*cos(wx)*sin(wy)" \
-		-e "f1=$coef[7]*sin(wx)*cos(wy)+$coef[8]*sin(wx)*sin(wy)" \
-		-e "wx=2*3.1416/$resolu[1]*x;wy=2*3.1416/$resolu[2]*y" \
+	pcomb -f $td/fsub.cal -f $td/coef \
+		-e "xres=$resolu[1];yres=$resolu[2]" \
 		$td/pf > $td/hf
+	donefsub:
 	if ( $?blend ) then
 		if ( $?verb ) then
 			echo blending edges...
@@ -99,6 +132,8 @@ _EOF_
 			$td/bottom $td/top > $td/top.patch
 		pcompos $td/hflr 0 0 $td/bottom.patch 0 0 $td/top.patch 0 $mar \
 			| getinfo - >> $f
+	else
+		getinfo - < $td/hf >> $f
 	endif
 	if ( $?verb ) then
 		echo $f done.