[NTG-pdftex] [ pdftex-Patches-473 ] \ifabsnum and \ifabsdim

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Patches item #473, was opened at 2006-01-27 14:20
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Category: Primitives
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Taco Hoekwater (taco)
Assigned to: Nobody (None)
Summary: \ifabsnum and \ifabsdim

Initial Comment:
Here is a small change file that implements two new
etex primitives :
  \ifabsnum 
  \ifabsdim 
Usage is the same as \ifnum and \ifdim. The only 
difference is that they negate the values if they are
negative before comparing.

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>Comment By: Hans Hagen (hagen)
Date: 2006-01-27 14:31

Message:
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intended usage: 

\ifabsdim \dimexpr \maxheight - \currentheight \relax < .5pt 
  assume that we're done 
\fi 

it can also be used to handle rounding errors when doing
roundtrip calculations 


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