On Sat, 13 Jan 2001, Hilmar Strickfaden wrote:

> 
> Hello Everybody
> 
> I am currently discovering dia (newest linux-release) and I am very
> impressed by the possibilities one has with this powerful program.
> 
> Due to the fact that I have to create some "Euler-Venn" diagrams
> (diagrams to display sets) for a student's script on mathematics I wonder
> if it is possible to create them with dia.
> 
> I tried to draw a diagram in which two sets intersect themselves. Somehow
> it wasn't possible for me  to create an object that represents the
> intersection set.
> 
> Has anybody an Idea how I can use dia to create these Euler-Venn diagrams
> ?

Try using a Beziergon and from the middle mouse menu choose 'Cusp control'
for each endpoint.  Then you can bend the endpoints to look like the
intersection set.  With judicious use of grid you can make various sets
match up.  Unfortunately, beziergons cannot create perfect circles, but you
can approximate it.

Two quick attempts can be seen at
<URL:http://shasta.cs.uiuc.edu/~lrclause/EulerVenn.dia>

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause) | Hårdgrim of Numenor
"I do not agree with a word that you say, but I    | Retainer of Sir Kegg
will defend to the death your right to say it."    |   of Westfield
    --Evelyn Beatrice Hall paraphrasing Voltaire   | Chaos Berserker of Khorne

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