[QGIS-Developer] Processing 3.0: Possible change to the Convex Hull algorithm

Nyall Dawson nyall.dawson at gmail.com
Mon Jun 26 16:41:24 PDT 2017

On 27 June 2017 at 09:38, Nyall Dawson <nyall.dawson at gmail.com> wrote:
> Hi all,
> As you may be aware, I've been working on rebuilding the backend of
> Processing in c++ and refining how it operates.
> As part of this I'd like to clear up the list of existing algorithms
> and also refine how they behave. This list of "QGIS" algorithms has
> grown organically during the 2.x cycle, and there's now numerous
> oddities in the selection of available algorithms and their options.
> This discussion relates to the "Convex Hull" algorithm. I'd like to:
> 1. Drop the "Field (optional, only used if creating convex hulls by
> classes)" option and the accompanying method choice used to set the
> convex hull to 'create convex hulls based on field'.

Argh - missed off point 2 here:

2. Make the algorithm always operate on individual features. It would
take the input (multi)geometries and export convex hulls for each
input feature.


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