Hi Nicolas,
Thanks for the suggestions. I'd had the thought of making it easy to
insert some pre- and post- commands such as \begin{center}\end
{center}, similar to the way we can now add to the general latex
preamble. Commands for Beamer to gradually develop a sequence of
graphs are another good idea, and we're going to work on a way to keep
scaling and bounding boxes consistent across several graphics to
support these sorts of crude animations.
Two thoughts on dot2tex, which I don't know very well. As has been
discussed, GraphViz has an incompatible license, but if it was
installed it could be useful to have just layout information computed
and passed into a Sage graph (for use with any sort of rendering, plot
or latex). It looks like dot2tex will actually create complete latex
code, and if so, the new GraphLatex class is designed to make adding
this sort of alternative very easy. It would be wise then to try to
coordinate on the names and usage of whatever further options are
added, allowing for latex code for each package to be generated
accordingly. That way, one could perhaps get two different latex
versions with a minimum of changes.
Rob
On Jun 16, 10:38 am, "Nicolas M. Thiery" <nicolas.thi...@u-psud.fr>
wrote:
> On Mon, Jun 15, 2009 at 12:19:49PM -0700, Rob Beezer wrote:
>
> > On Jun 15, 3:03 am, William Stein <wst...@gmail.com> wrote:
> > > Just out of curiosity what computes the layout of the graph? Does
> > > Sage give the vertex positions, then tikz takes care of the *text
> > > labels* and edge positions? Or can tikz actually plot a layout?
>
> > The tkz-graph package is really more about presentation ("looks") than
> > about computation. It will do simple things like circular and grid
> > layouts, paths on lines at 45-degree angles, etc. It will easily
> > "bend" edges, which is useful for digraphs when there is an edge going
> > both ways between two vertices. But on the whole, I think matters
> > regarding layouts are best handled within Sage itself, and then just
> > scaled linearly to fit bounding boxes, etc.
>
> > The strengths of tkz-graph are the placements and styles of labels on
> > vertices and edges, and the styles of the vertices and edges
> > themselves. For example, edges can be of one color with thin black
> > borders, and at crossings there is an obvious "under and over"
> > appearance which helps the eye track an edge in a messy looking
> > graph. Edge labels can appear in the middle of an edge (suitably
> > rotated to align with the edge), included inside a rectangle with a
> > colored border, with Latex math objects for contents, typeset
> > properly.
>
> > And finally, as Latex code they can be employed by all the support
> > Sage has for Latex, and they can be employed in other documents
> > without the whole business of including image files produced by some
> > other mechanism.
>
> Including fine tuning a posteriori the layout, inserting by hand some
> extra features, adding some \uncover<3->{...} for inclusion in beamer
> presentations, etc; all of which we use a lot!
>
> For info: I'll try to give it a shot at making an optional dot2tex
> spkg before FPSAC and integrating this with your graph -> latex export
> (to handle the layout).
>
> Best,
> Nicolas
> --
> Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>http://Nicolas.Thiery.name/
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-devel@googlegroups.com
To unsubscribe from this group, send email to
sage-devel-unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---
