[NTG-context] Define color with calculations

[Mohammad Hossein Bateni]

Thanks, Henri!  Works like a charm.

On Sun, Feb 17, 2019 at 11:03 PM Henri Menke <henrimenke at gmail.com> wrote:

> Use Lua.
>
>
> \def\eval#1{\ctxlua{%
>     local context = context
>     local _ENV = math
>     context(#1)
> }}
>
> \definecolor[mycolor][r=\eval{0.5*0.7}]
>
> \starttext
>
> \color[mycolor]{Hello!}
>
> \stoptext
>
>
>
> On 18/02/19 4:37 PM, Mohammad Hossein Bateni wrote:
> > Hi,
> >
> > When I use definecolor, (how) can I use computations in setting the value
> > of a component?  Something like the following...
> >
> > \definecolor[mycolor][r=0.5*0.7]
> >
> > Thanks,
> > ~MHB
> >
> >
> >
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> >
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
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