#! /bin/sh

makearrow()
{
cat <<EOT
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   width="64px"
   height="64px">
  <g>
    <path
       d="M $xl0,$yl0 L $xl1,$yl1 C $xcc0,$ycc0 $xcc1,$ycc1 $xc0,$yc0$extra"
       style="fill:none;stroke:#${colval};stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;stroke-miterlimit:4;stroke-dasharray:none" />
    <path
         transform="translate($xa0,$ya0) scale(3) rotate($angle)"
         d="M -4,1 L 0,-7 L 4,1 C 2,-1 -2,-1 -4,1"
         style="fill:#${colval};stroke:#${colval};stroke-linejoin:round"
         />

  </g>
</svg>
EOT
}

makeroundabout()
{
cat <<EOT
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   width="64px"
   height="64px">
  <g>
    <path
       d="M $xa0 $ya0 A $r $r 0 $long1 $sweep $xl1 $yl1"
       style="fill:none;stroke:#${colval};stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;stroke-miterlimit:4;stroke-dasharray:2,4" />
    <path
       d="M $xl0,$yl0 L $xl1,$yl1 A $r $r 0 $long2 $sweep $xa0 $ya0 L $xl2 $yl2"
       style="fill:none;stroke:#${colval};stroke-width:8;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;stroke-miterlimit:4;stroke-dasharray:none" />
    <path
         transform="translate($xl2,$yl2) scale(2) rotate($angle)"
         d="M -4,1 L 0,-7 L 4,1 C 2,-1 -2,-1 -4,1"
         style="fill:#${colval};stroke:#${colval};stroke-linejoin:round"
         />
  </g>
</svg>
EOT
}

yl0=63
for col in bk wh
do
	case $col in
	bk)
		colval="000000"
		;;
	wh)
		colval="ffffff"
		;;
	esac
	for dir in left right
	do
		xl0=32
		xl1=32
		angle=360
		step=-45
		xa=33.5
		xb=26
		xc=16
		xd=22
		xe=32
		xf=28
		if [ "$dir" = "right" ]
		then
			angle=0
			step=45
			xa=30.5
			xb=$((64-xb))
			xc=$((64-xc))
			xd=$((64-xd))
			xe=$((64-xe))
			xf=$((64-xf))
		fi
		for st in 1 2 3
		do
			case $st in
			1)
				yl1=42
				yc0=20
				ycc1=31
				ycc0=31
				ya0=20
				xc0=$xd
				xa0=$xd
				xcc0=$xe
				xcc1=$xe
				;;
			2)
				yl1=25
				yc0=20
				ycc1=20
				ycc0=22
				ya0=20
				xc0=$xd
				xa0=$xd
				xcc0=$xe
				xcc1=$xf
				;;
			3)
				yl1=32
				yc0=26
				ycc1=16
				ycc0=10
				ya0=26
				xc0=$xc
				xa0=$xc
				xcc0=$xa
				xcc1=$xb
				;;
			esac
			angle=$((angle+step))
			filename="nav_${dir}_${st}_$col.svg"
			extra=""
			makearrow >$filename
		done
		filename="nav_turnaround_${dir}_$col.svg"
		angle=180
		xcc0=48
		xc0=22
		xcc1=22
		xl0=48
		xl1=48
		xa0=22
		if [ "$dir" = "right" ]
		then
			xcc0=$((64-$xcc0))
			xc0=$((64-$xc0))
			xcc1=$((64-$xcc1))
			xl0=$((64-$xl0))
			xl1=$((64-$xl1))
			xa0=$((64-$xa0))
		fi
		yl1=20
		yc0=20
		ycc1=0
		ycc0=0
		ya0=35
		extra=" L $xc0 $ya0"
		makearrow >$filename
		xl0=32
		xl1=32
		yl1=44
		r=12
		letter=l
		angle=180
		step=45
		longa=1
		longb=0
		sweep=1
		xa=26
		xb=38
		if [ "$dir" = "right" ]
		then
			letter=r
			step=-45
			longa=0
			longb=1
			sweep=0
			xa=$((64-xa))
			xb=$((64-xb))
		fi
		for st in 1 2 3 4 5 6 7 8
		do
			angle=$((angle+step))
			if [ $angle -ge 360 ]
			then
				angle=$((angle-360))
			fi
			if [ $angle -lt 0 ]
			then
				angle=$((angle+360))
			fi
			xa0=40.46
			ya0=40.46
			long1=$longb
			case $angle in
			0)
				xa0=32
				ya0=20
				xl2=32
				yl2=14
				;;
			45)
				xa0=40.46
				ya0=23.54
				xl2=44.7
				yl2=19.3
				;;
			90)
				xa0=44
				ya0=32
				xl2=50
				yl2=32
				;;
			135)
				xa0=40.46
				ya0=40.46
				xl2=44.7
				yl2=44.7
				;;
			180)
				xa0=$xb
				ya0=44
				xl0=$xa
				xl1=$xa
				xl2=$xb
				yl2=50
				long1=0
				;;
			225)
				xa0=23.54
				ya0=40.46
				xl2=19.3
				yl2=44.7
				long1=$longa
				;;
			270)
				xa0=20
				ya0=32
				xl2=14
				yl2=32
				long1=$longa
				;;
			315)
				xa0=23.54
				ya0=23.54
				xl2=19.3
				yl2=19.3
				long1=$longa
				;;
			esac
			long2=$((1-long1))
			filename="nav_roundabout_${letter}${st}_$col.svg"
			makeroundabout >$filename
		done
	done
	filename="nav_straight_$col.svg"
	xl0=32
	xl1=32
	yl1=32
	xcc0=32
	ycc0=10
	xcc1=32
	ycc1=16
	xc0=32
	yc0=26
	xa0=32
	ya0=26
	angle=0
	extra=""
	makearrow >$filename
done