Argh... It's because of the line splits in email. I just put the file on my website:
http://cfd.homelinux.org/tex/
Hi David and all ConTeXters,
I was away from my e-mail so I am late in answering.
Thank you for the file you put on your site. Indeed everything works as intended (the \placeformula no longer advances with each step), and I think one may suggest to Hans to include this in future distributions.
However, in the spirit of ConTeXters who are always asking for a step(!) towards perfectness, I let you know the following drawbacks of the macros:
1) Somehow the \FromStep[n][reserve] changes the internal mechanism of glue or spaces in displayed formulas. So one needs (as you do in your example) to add \; around operators such as +, -, =. Can one avoid this?
2) When one refers (see example below) with the command (\in[eq:NS]) to an equation which has been introduced with \placeformula[eq:NS] the interaction makes appear the first instance of that formula, which may be incomplete. Could one have a control over this, that is for instance, in this particular case, make appear the completed equation at the end of the slide made with \StartSteps[Navier||Stokes equation]?
Best regards: OK
%%%% file steps-david-3.tex %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % usage example %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usemodule [pre-original] \usemodule [rsteps]
\starttext
\StartSteps[Slide Title] % the title is passed to
% the \Subject macro\startitemize
\item Item 1
\OnlyStep[2] {\item (oops!)}
\UntilStep[4] {\item Item 2*}
\FromStep[4] {\item Item 2}
\HighlightStep[3]{\item
Here is another version of Navier-Stokes equation}
\stopitemize\StopSteps
\StartSteps[Navier||Stokes equation]
\placeformula[eq:incompressibility] \startformula \vec\nabla\cdot\vec u = 0 \stopformula
\placeformula[eq:NS]
\startformula
\frac{D\vec u}{Dt} =
\FromStep[2][reserve]{-{\red \frac1\rho \vec\nabla p}}
\FromStep[3][reserve]{+\;{\green \vec g}}
\FromStep[4][reserve]{+\;{\blue \frac1\rho \vec\nabla\cdot S}}
\stopformulaMomentum transport: \NextStep
\item {\red Pressure gradient} \par\NextStep
\item {\green Gravity} \par\NextStep
\item {\blue Stress (viscous, turbulent, Maxwell)}
\StopSteps
\StartSteps[Navier Stokes equation]
\placeformula[eq:div-nul] \startformula \vec\nabla\cdot\vec u = 0 \stopformula
\placeformula[eq:NStokes] \startformula { \partial u \over \partial t} - \Delta u \FromStep[1][reserve]{{\red \; +\; (u\cdot \nabla)u}} \FromStep[2][reserve]{{\green \; +\; \nabla p}} \FromStep[3][reserve]{{\blue \; =\; f(t,x)}} \stopformula
Comments:
\NextStep \item Nonlinear equation (same is true for equation (\in[eq:NS]) \par\NextStep
\item One should add initial conditions \par\NextStep
\item and boundary conditions
\StopSteps \stoptext %%%%%% end file steps-david-3.tex _______________________________________________ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
