Joerg,
This only needs a bit of compression, not to overwhelm an equation.
It is good looking in print and it is simple, thank you.
Since PS was incorporated into troff (a very long time), I completely
forgot
about pic, and was wondering why anyone wanted to use it.
Now I need to reconsider, pic can still be rather useful.
Thanks again,
Miklos
On 28/02/2007, at 7:06 PM, Joerg van den Hoff wrote:
On Wed, Feb 28, 2007 at 01:42:38PM +1100, Miklos Somogyi wrote:
Dear Folks,
I need some integral signs with circles/ellipses around them (e.g. for
control volumes).
I've experimented a lot but only got something that is just acceptable
in print,
but downright ughhly in Preview and Acrobat.
How would you stretch the circle of the double- and triple integrals?
I've tried \(ci instead of `o' but it looks very thin compared to
thick int signs.
What can you suggest (espec something scalable)?
Thanks,
Miklos
I'm sure there is some low level way to do this, otherwise `pic' won't
work
anyway, but maybe you can use some ugly construct like:
.EQ
delim $$
.EN
.PS
.ps 24
ps = 24
eh = ps / 140
ew = 4 * eh
bw = 10 * eh
ellipse height eh width ew "$int int int$"
box invis width bw with .w at last ellipse.e "$f(x, y, z) dV$"
.PE
(and shoving this into a macro might even preserve readability of the
document
source ...)
this would work only for display equations, not for inline equations.
I'm not
sure if one can use troff registers within `pic'. if so, one could
avoid to
dublicate the point size definition (needed for the empirical
"scalability"),
but `ps = \n[.s]' does not work, it seems.
HTH
joerg
