[Qgis-developer] Python skipping features for unknown reason

[Nathan Woodrow]

Allar,

We will have to see some code to be of any help.  Why not consider putting
it up on GitHub if you haven't already

-Nathan
On 24 Jan 2013 01:09, "Allar Haav" <allar.haav at gmail.com> wrote:

> Hi all,
>
> I recently started learning Python and I'm currently finishing my first
> plugin that I really needed for QGIS - it performs a simple similarity
> transform on point layer. While the familiar qgsAffine presupposes that I
> know exactly the translation and rotation parameters, there often cases
> when I do not. What I might have is just information (GPS measurements for
> example) that points A and B should have coordinates x1,y1 and x2,y2. And
> that's it.
> So far I've managed to get everything working, but I have run into weird
> problems. When I perform the operations on really small datasets,
> everything is working fine. But when I have a layer with, say 600 points,
> QGIS starts acting weird. Sometimes it performs ok, yet once in a while
> some points aren't affected by the transformation, basically it starts
> skipping features. It seems as if the memory buffer is overloaded (?). Any
> ideas on that? The code in main transformation method is put between
> beginEditCommand() and endEditCommand(), the points are moved using
> moveVertex() function.
>
> Regards,
> Allar
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