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.PS
# Crossbar
gen_init
circlerad = 0.12
boxwid = 0.18
boxht = 0.18
rathick = 1.5
rawd = rathick*4 bp__
raht = rawd*2
boxdist = boxwid*1.8
define bcoord {($2,-($1))*boxdist}
define redarrow { arrow ht raht wid rawd thick rathick color "red" }
define cbx {
thinlines_
n = $+ - 1
for i=0 to n do {
line color "blue" from bcoord(i,0) to bcoord(i,n)
line color "blue" from bcoord(0,i) to bcoord(n,i)
C[i]: circle invis at bcoord(i,-1.5)
}
for i=0 to n do {
exec sprintf("col = $%g",i+1)
redarrow from C[i].e right 1.25*boxwid
redarrow from C[i].w+(-boxwid,0) right raht
for j=0 to n do {
B: box outlined "blue" shaded "yellow" at bcoord(i,j)
if j==col then {
line color "blue" from B.s to B.e
line thick rathick color "red" from C[i].e to B.w \
then to B.n then to (B.x,C[0].y+(2+j*2/3)*boxht)
continue to (C[j].x-(2+j*2/3)*boxht,Here.y)
continue to (Here,C[j]) then to C[j].w
} \
else {
line color "blue" from B.n to B.s
line color "blue" from B.w to B.e
}
}
}
thicklines_
for i=0 to n do {
circle thick 1.5 outlined "blue" shaded "yellow" at C[i] \
sprintf("iflatex(\large)%g",i)
}
}
ifdpic(`
cbx(3,6,0,5,2,7,1,4)
',`box wid 1 ht 0.75 "Crossbar.m4" "requires" "dpic"')
.PE
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