Hi, <br>After research, it seems QGIS can draw parametric line with Bezier3D and parametricLine classes : <a href="http://www.qgis.it/api/classBezier3D.html">http://www.qgis.it/api/classBezier3D.html</a><br>In your plugin CADTOOL do you use these objects ? <br>
Other question for developer, do you think this bezier3d curve need a transformation into linearstring for correct rendering ?<br><br>Best regards,<br>SR.<br><br><div class="gmail_quote">On Sun, Jul 17, 2011 at 4:26 PM, Ziegler Stefan <span dir="ltr"><<a href="mailto:Stefan.Ziegler@bd.so.ch">Stefan.Ziegler@bd.so.ch</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><u></u>
<div>
<div><span><font color="#0000ff" face="Arial" size="2">Hi
</font></span>
</div>
<div><span><font color="#0000ff" face="Arial" size="2"></font></span>
</div>
<div><span><font color="#0000ff" face="Arial" size="2">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. </font></span>
</div>
<div><span><font color="#0000ff" face="Arial" size="2"></font></span>
</div>
<div><span><font color="#0000ff" face="Arial" size="2">regards</font></span>
</div>
<div><span><font color="#0000ff" face="Arial" size="2">Stefan</font></span>
</div>
<blockquote dir="ltr" style="padding-left:5px;margin-left:5px;border-left:#0000ff 2px solid;margin-right:0px">
<div><font face="Times New Roman" size="2">-----Ursprüngliche
Nachricht-----<br>
<b>Von:</b> reyman
[mailto:<a href="mailto:reyman64@gmail.com" target="_blank">reyman64@gmail.com</a>]<br>
<b>Gesendet am:</b> Sonntag, 17. Juli 2011
01:30<br>
<b>An:</b> <a href="mailto:qgis-developer@lists.osgeo.org" target="_blank">qgis-developer@lists.osgeo.org</a><br>
<b>Betreff:</b>
[Qgis-developer] Re: Curved line in QGIS, how i can anticipate CIRCULARSTRING
SQL-MM3 specification in QGIS?<br>
</font></div><div><div></div><div class="h5">
<p>
Hello community, <br>
No answer or idea to help me on this problem ?<br>
Best
regards,<br>
SR<br>
<br>
</p><div class="gmail_quote">On Wed, Jul 13, 2011 at 5:00 PM, reyman <span dir="ltr"><<a href="mailto:reyman64@gmail.com" target="_blank">reyman64@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="padding-left:1ex;margin:0px 0px 0px 0.8ex;border-left:#ccc 1px solid">
Hello
devs,<br>
<br>
I'm working on a project to draw simple arc/curves lines to
represent (a lot of ) flow between two points. <br>
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 ... <br>
QGIS can't actually draw
curved lines...<br>
<br>
Actually here my few and poor idea to resolve this
problem :<br>
<br>
> I use <span style="font-size:10pt"><span>Stefan
Ziegler QGIS plugin CADTOOLS to compute and draw any</span></span> WKT using
the CIRCULARSTRING geometry type, with few point to limit the complexity of
polylines generated<br>
<br>
> I'm waiting for the next QGIS dev version,
because it seems developper want to implement this function ( cf<a href="http://www.qgis.org/wiki/6._QGIS_Developer_Meeting_in_Zurich_2011" target="_blank">
QGIS Developer Meeting in Zurich 2011</a> or <a href="http://www.qgis.org/wiki/KCube-developer" target="_blank">http://www.qgis.org/wiki/KCube-developer</a>
)<br>
<br>
> 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 ?<br>
<br>
So QGIS dev,
what's your opinion about that, or your next plan if you have a roadmap to
implement these functionnality ? <br clear="all">
If you want to develop this
functionnality in this summer, i'm ok to help and debug the code with you
...<br>
<br>
Ps: i have post a question in gis stackexchange, but no
answer actually ...<br>
<a href="http://gis.stackexchange.com/questions/12007/how-i-can-draw-or-edit-curved-lines-in-free-gis" target="_blank">http://gis.stackexchange.com/questions/12007/how-i-can-draw-or-edit-curved-lines-in-free-gis</a><br>
<br>
<b>Thanks
a lot GIS community</b><br>
SR.<br>
<font color="#888888"><br>
-- <br>
<a href="http://stackoverflow.com/users/385881/reyman64" target="_blank"><img src="http://stackoverflow.com/users/flair/385881.png"></a><br>
<br>
</font>
</blockquote>
</div><br>
<br clear="all">
<br>
--
<br>
<a href="http://stackoverflow.com/users/385881/reyman64" target="_blank"><img src="http://stackoverflow.com/users/flair/385881.png"></a><br>
<br>
<p>
</p><p></p></div></div></blockquote></div></blockquote></div><br><br clear="all"><br>-- <br><a href="http://stackoverflow.com/users/385881/reyman64" target="_blank"><img src="http://stackoverflow.com/users/flair/385881.png"></a><br>
<br>