[Ipe-discuss] Drawing a line

Fabio Stumbo stf at unife.it
Tue Jul 21 16:24:16 CEST 2020

Il 21/07/20 14:25, Otfried Cheong via Ipe-discuss ha scritto:
> On Tue, Jul 21, 2020, at 14:07, Fabio Stumbo via Ipe-discuss wrote:
>> I used IPE  many years ago to produce a lot of compass and ruler
>> constructions.
>> Now I need to produce some more but I am a in trouble because I am not
>> able to do things that I was able to do then (now I am currently using
>> v. 7.2.13 on Ubuntu 20.04).
>> In particular, I am not able to draw the line passing through two given
>> point: I can draw the segment from a point to another, but not the line
>> through them.
>> Without (at least) this feature, it becomes a real pain to do nearly
>> everything!
> Ipe never had a function to draw the line through two given points, because Ipe does not support infinite features.
> I would normally do what you want to do using F1 and F2 (Example 4 on http://ipe.otfried.org/manual/manual_27.html).
> Cheers,
>    Otfried

Nice workaround!

Probably I used it but I couldn't remember it (then I was younger and 
smarter... 🙂 ).

Maybe it could be a good idea to advice it better (I looked in the FAQ 
and also at the example you pointed at, but I didn't realize at first 
glance it was what I was looking for), because complex constructions 
with compass and ruler are impossible without it.

Even better would be to implement it, but I guess from what you said 
that this is no easy task.

Thank you


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