David Arnold wrote:
> All,
>
> Anyone have a nice technique to "strike out" the common primes using
> the color red?
>
> \placeformula[-]
> \startformula
> \frac{12}{18}=\frac{2\cdot2\cdot3}{2\cdot3\cdot3}=\frac23
> \stopformula
A simple solution:
\defineoverlay[strikeme][{\color[red]{\bf/}}]
\def\strikeout#1{\mframed[frame=off,background={foreground,strikeme}]{#1}}
will draw bold red slashes over the numbers. They still seem a bit too
thin too me , but you could use other bolder characters if needed.
A more complex solution with metafun:
\startuniqueMPgraphic{strikeme}
draw (0,0)--(OverlayWidth,OverlayHeight) withpen pencircle scaled 3pt
withcolor red;
\stopuniqueMPgraphic
\defineoverlay[strikeme][\uniqueMPgraphic{strikeme}]
\def\strikeout#1{\mframed[frame=off,background=strikeme]{#1}}
Usage:
\startformula
\frac{12}{18}=\frac{\strikeout{2}\cdot2\cdot\strikeout{3}}{\strikeout{2}\cdot\strikeout{3}\cdot3}=\frac23
\stopformula
Mojca
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