Re: [Groff] Integral signs

[Miklos Somogyi]

Bob,

This looks very good in print and in MacGhostView.
I went through the triple integral and was wandering how 0.05m  
adjustment between integral signs
could be enough, and why wasn't a horizontal adjustment after the third  
integral, but the facts speak for themselves.
You must have spent quite a few hours to make these integrals so  
appealing.

Thank you very-very much,
Miklos


On 28/02/2007, at 10:02 PM, Bob Diertens 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)?
>
> Use \D'e X Y' for the ellips.
> The example below looks good in print and decent in a previewer.
>
> ---
> .EQ
> delim $$
> define oint % type "operator" vcenter size +5 "\v'-0.2m'\D'e 0.4m  
> 0.4m'\v'0.2m'\h'-0.2m-(\w'\(is'u/2u)'\v'0.2m'\(is\v'-0.2m'" %
> define oiint % type "operator" vcenter size +5 "\v'-0.2m'\D'e  
> 0.4m+(\w'\(is'u-0. 05m)  
> 0.4m'\v'0.2m'\h'-0.2m-((\w'\(is'u-0.05m)/2u)-((\w'\(is\(is'u-0.05m)/ 
> 2u)'\v'0.2m'\(is\h'-0.05m'\(is\v'-0.2m'" %
> define oiiint % type "operator" vcenter size +5 "\v'-0.2m'\D'e  
> 0.4m+(\w'\(is\(is'u-0.10m)  
> 0.4m'\v'0.2m'\h'-0.2m-((\w'\(is\(is'u-0.10m)/2u)-((\w'\(is\(is\(is'u 
> -0.10m)/2u)'\v'0.2m'\(is\h'-0.05m'\(is\h'-0.05m'\(is\v'-0.2m'" %
> .EN
> .sp 3
> $oint x + y$ $size +2 { oint x + y }$ $size +4 { oint x + y }$ $size  
> +8 { oint x + y }$ $size +16 { oint x + y }$
> .sp 3
> $oiint x + y$ $size +2 { oiint x + y }$ $size +4 { oiint x + y }$  
> $size +8 { oiint x + y }$ $size +16 { oiint x + y }$
> .sp 3
> $oiiint x + y$ $size +2 { oiiint x + y }$ $size +4 { oiiint x + y }$  
> $size +8 { oiiint x + y }$ $size +16 { oiiint x + y }$
> ---
>
> Gr,
>     Bob