PS
# Ttree.m4
# A binary tree using m4
gen_init
sinclude(tst.dim)
s_init(Ttree)
# `Node(no in row, head [location],
# displacement of top of body (.n) wrt head,
# body Node 1, body Node 2, ...) '
define(`Node',`
Head`$1': `$2'
ifelse(`$3',,,` Body`$1': [
Loopover_(`v',`v; define(`m4ct',m4Lx)',shift(shift(shift($@))))
] with .n at Head`$1' + `$3'
connect(`$1',m4ct)')')
define(`connect',`Bot: move from Head$1.sw-(0,5bp__) to Head$1.se-(0,5bp__)
for_(1,`$2',1,
`Top: move from Body$1.Head`'m4x.nw+(0,2bp__) \
to Body$1.Head`'m4x.ne+(0,2bp__)
Mov: move from Head$1 to Body$1.Head`'m4x
if Bot.len*Top.len*Mov.len > 0 then {
line from Intersect_(Mov,Top) to Intersect_(Mov,Bot)}')')
vsep = 0.75
define(`txw',`wid `$1'mm__')dnl scaled by 14/12 for 14 pt type
Node(1,"svg_it(h(h(h(x`'svg_sub(1),x`'svg_sub(2))," \
+ "h(x`'svg_sub(3),x`'svg_sub(4))),h(h(x`'svg_sub(5),x`'svg_sub(6))," \
+ "h(x`'svg_sub(7),x`'svg_sub(8)))))" txw(70) ,
(0,-vsep),
Node(1,"svg_it(h(h(x`'svg_sub(1),x`'svg_sub(2)),h(x`'svg_sub(3)," \
+ "x`'svg_sub(4))))" txw(32) ,
(0,-vsep),
Node(1,"svg_it(h(x`'svg_sub(1),x`'svg_sub(2)))" txw(14) ,
(0,-vsep),
Node(1,"svg_it(x`'svg_sub(1):=((A,pk`'svg_sub(A)),h`'svg_sub(1)))" \
txw(29) ),
Node(2,"svg_it(x`'svg_sub(2):=((B,pk`'svg_sub(B)),h`'svg_sub(2)))" \
txw(29) with .n at last "".ne+(0.2,-vsep*2/3))),
Node(2,"svg_it(h(x`'svg_sub(3),x`'svg_sub(4)))" txw(14) \
with .nw at Head1.ne+(Body1.wid/2+0.1,0),
(0,-vsep),
Node(1,"svg_it(x`'svg_sub(3):=" \
+ "((A,pk`'svg_prime`'svg_sub(A,,,-0.5ex)),h`'svg_sub(3)))" \
txw(29)),
Node(2,"svg_it(x`'svg_sub(4):=((D,pk`'svg_sub(D)),h`'svg_sub(4)))" \
txw(29) with .n at last "".ne+(0.2,-vsep*2/3)))),
Node(2,"svg_it(h(h(x`'svg_sub(5),x`'svg_sub(6)),h(x`'svg_sub(7)," \
+ "x`'svg_sub(8))))" txw(29) with .nw at Head1.ne+(Body1.wid/2,0),
(0,-vsep),
Node(1, "svg_it(h(x`'svg_sub(5),x`'svg_sub(6)))" txw(14) ,
(0,-vsep*5/4),
Node(1,"svg_it(x`'svg_sub(5):=((E,pk`'svg_sub(E)),h`'svg_sub(5)))" \
txw(29) ),
Node(2,"svg_it(x`'svg_sub(6):=((H,pk`'svg_sub(H)),h`'svg_sub(6)))" \
txw(29) with .n at last "".ne+(0.2,-vsep*2/3))),
Node(2,"svg_it(h(x`'svg_sub(7),x`'svg_sub(8)))" txw(14) \
with .nw at Head1.ne+(Body1.wid/2+0.1,0),
(0,-vsep*5/4),
Node(1,"svg_it(x`'svg_sub(7):=" \
+ "((D,pk`'svg_prime`'svg_sub(D,,,-0.5ex)),h`'svg_sub(7)))" \
txw(29) ),
Node(2,"svg_it(x`'svg_sub(8):=((K,pk`'svg_sub(K)),h`'svg_sub(8)))" \
txw(29) with .n at last "".ne+(0.2,-vsep*2/3))),
Node(3,"svg_it(h(x`'svg_sub(9)))" txw(8) \
at 0.5 between Head1 and Head2)))
