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pic doesn't center when i use a macro
From: |
Marc Chantreux |
Subject: |
pic doesn't center when i use a macro |
Date: |
Mon, 1 Nov 2021 19:57:15 +0100 |
hello groffers,
I wrote the following code to illustrate the DOD model encapsulation.
sadly: the label of the layers are not centred. it seems to be relative
to the fact i use a function as it works fine when i replace
label_for(layer) by a simple string
like
box width w height margin \
with .nw at last box .nw dashed \
"" label_for(layer) ""
by
box width w height margin \
with .nw at last box .nw dashed \
"" "eat the road, jack" ""
I can do something more manual but i really would like to take advantage
of the expressivity of pic. Any other comment is also warmly welcome.
regards,
marc
# compiled with
# scan.ps: scan.ms ${deps} ; groff -skp -ms -mfr $< > $@
.PS
define label_for {
if $1 == 0 then { "Entête Ethernet" } else {
if $1 == 1 then { "Entête IP" } else {
if $1 == 2 then { "Entête TCP" } else {
if $1 == 3 then { "Donnees applicatives" } else {
} } } }
}
w = 3 ; h = 2; margin = .2 ; tr = 2 * margin
for layer = 0 to 3 do {
s = layer * margin
box width w height h with .sw at (s,s)
box width w height margin with .nw at last box .nw dashed ""
label_for(layer) ""
w = w - tr
h = h - tr
}
.PE
- pic doesn't center when i use a macro,
Marc Chantreux <=