[Qgis-developer] Re: Curved line in QGIS, how i can anticipate CIRCULARSTRING SQL-MM3 specification in QGIS?

[reyman]

Hi,
After research, it seems QGIS can draw parametric line with Bezier3D and
parametricLine classes : http://www.qgis.it/api/classBezier3D.html
In your plugin CADTOOL do you use these objects ?
Other question for developer, do you think this bezier3d curve need a
transformation into linearstring for correct rendering ?

Best regards,
SR.

On Sun, Jul 17, 2011 at 4:26 PM, Ziegler Stefan <Stefan.Ziegler at bd.so.ch>wrote:

> **
> Hi
>
> I think that curved line support is not that important to most of the
> users. I really would like to see this feature in QGIS. But this is
> something that needs some funding and as far as I know some changes deep in
> the core. Something for QGIS 2.x I guess.
>
> regards
> Stefan
>
> -----Ursprüngliche Nachricht-----
> *Von:* reyman [mailto:reyman64 at gmail.com]
> *Gesendet am:* Sonntag, 17. Juli 2011 01:30
> *An:* qgis-developer at lists.osgeo.org
> *Betreff:* [Qgis-developer] Re: Curved line in QGIS, how i can anticipate
> CIRCULARSTRING SQL-MM3 specification in QGIS?
>
> Hello community,
> No answer or idea to help me on this problem ?
> Best regards,
> SR
>
> On Wed, Jul 13, 2011 at 5:00 PM, reyman <reyman64 at gmail.com> wrote:
>
>> Hello devs,
>>
>> I'm working on a project to draw simple arc/curves lines to represent (a
>> lot of ) flow between two points.
>> I think it's a good idea to use the new geometry type "CIRCULARSTRING"
>> implemented in Postgis to store/edit the arc/curve, one problem ...
>> QGIS can't actually draw curved lines...
>>
>> Actually here my few and poor idea to resolve this problem :
>>
>> > I use Stefan Ziegler QGIS plugin CADTOOLS to compute and draw any WKT
>> using the CIRCULARSTRING geometry type, with few point to limit the
>> complexity of polylines generated
>>
>> > I'm waiting for the next QGIS dev version, because it seems developper
>> want to implement this function ( cf QGIS Developer Meeting in Zurich
>> 2011 <http://www.qgis.org/wiki/6._QGIS_Developer_Meeting_in_Zurich_2011>or
>> http://www.qgis.org/wiki/KCube-developer )
>>
>> > I'm trying to develop (in python or it's only possible in C++ ?) a new
>> drawing extension which implement one function to draw pure bezier or simple
>> arc with CIRCULARSTRING geometry in input ?
>>
>> So QGIS dev, what's your opinion about that, or your next plan if you have
>> a roadmap to implement these functionnality ?
>> If you want to develop this functionnality in this summer, i'm ok to help
>> and debug the code with you ...
>>
>> Ps: i have post a question in gis stackexchange,  but no answer actually
>> ...
>>
>> http://gis.stackexchange.com/questions/12007/how-i-can-draw-or-edit-curved-lines-in-free-gis
>>
>> *Thanks a lot GIS community*
>> SR.
>>
>> --
>>  <http://stackoverflow.com/users/385881/reyman64>
>>
>>
>
>
> --
>  <http://stackoverflow.com/users/385881/reyman64>
>
>


-- 
<http://stackoverflow.com/users/385881/reyman64>
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