#15 Dia bond graph design interface
It would be nice to be able to draw hierarchical bond
graphs using the Dia diagram editor. This will provide
the following advantages:
* When ports are moved, bonds and bond labels will
follow automatically. Bonds will never collide with
components.
* Will be possible to construct hierarchical bond
graphs using either .fig or .dia diagrams.
* Bond connectivity, causality, and labels will be
structural properties, stored as XML in the dia file.
Unconnected bonds will appear differently from
connected bonds. Will not be necessary to check
connectivity using a stripped acausal bond graph
because there will be no ambiguity in the bond graph
representation.
Modifications to Dia have been written which interact
with mtt for non-hierarchical bond graphs. This works
just fine. In the mtt list, Geraint presents some
ideas about how to do hierarchical bond graphs with
Dia. It would be nice for us to pursue these ideas.
I am writing this 'feature request' to:
* Get this project rolling again after several hectic
months during which I quit working on this project.
* Indicate to prospective contributors that they can
contact me at my sourceforge e-mail address if they
wish to have the modified dia code for mtt/dia development.
David Hoover.
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Hi Dave,
I think I finally have -ibg working for hierarchical bond
graphs (it took a long time, sorry). The (*_abg.m) files
produced with or without using -ibg are now identical so
everything should(!) work for hierarchical bond graphs built
with Dia (or even Dia/Xfig hybrids, I think). At least, it
should all be ready for testing and fixing.
The changes that you made to Dia don't seem to have made it
into the Debian build (v0.93). Are the latest changes
available in the Dia CVS repository or does the code need to
be patched?
The latest patches that I am aware of are those at
http://mail.gnome.org/archives/dia-list/2002-November/msg00109.html
If you sent me any more recent ones, I'm afraid I will have
lost them - I've had a couple of hard drive failures and the
Sourceforge lists don't seem to keep attachments.
I tried building Dia from CVS last night (without applying
any patches) but without success - I'll try again in a few
days.
Geraint.