My simplification algorithm is a new method that uses the MapToPixel data of
current QgsRenderContext to ignore in the drawing of geometry the "equal-pixel
device points". It has no effect if the geometry is not far of current point of
view of map.
It does not uses the ST_Simplify() method (douglas-peucker algorithm) where the
geometry is simplified for other "similar" geometry.
>________________________________
> De: G. Allegri <[email protected]>
>Para: A Huarte <[email protected]>
>CC: qgis-developer <[email protected]>
>Enviado: Miércoles 23 de octubre de 2013 8:46
>Asunto: Re: [Qgis-developer] vector rendering improvement patch
>
>
>
>
>> Ok Andreas, I'm going to make it configurable, will present a new option in
>> the main properties form of the layer
>I suppose he meant to do not draw simplidied geometries during editing because
>it would obviously lead to produce unconsistent edits.
>giovanni
>>
>> About of simplification in "editmode". I think is not necessary disable it,
>> the simplification runs only on the method of painting
>> "QgsVectorLayer::draw", not when you retrieve a geometry to treat your
>> information.
>>
>> Alvaro
>>
>>> ________________________________
>>> De: Andreas Neumann <[email protected]>
>>> Para: [email protected]
>>> Enviado: Martes 22 de octubre de 2013 14:03
>>> Asunto: Re: [Qgis-developer] vector rendering improvement patch
>>>
>>> Hi,
>>>
>>> Thank you for your work!
>>>
>>> Yes - I think it should be configurable. It should also automatically be
>>> turned off if a layer is in edit mode.
>>>
>>> Just my opinion,
>>> Andreas
>>>
>>> Am 22.10.2013 14:01, schrieb A Huarte:
>>> > Hello Vincent!
>>> > For now, it is not configurable, automatically applies to all vector
>>> > layer to be painted.
>>> >
>>> > I think that the userneed not configure this, of course, if dev-community
>>> > suggests, will be as you say! :-)
>>> >
>>> >
>>> >> Is it configurable in the interface for each layer independantly ? >It
>>> >> should probably be, as according to the style applied to the geometries,
>>> >> >the simplification could be something we want for some layers and not
>>> >> for >others. >A checkbox in the layer properties dialog could be
>>> >> interesting. >Then we would have to decide if we want it activated by
>>> >> default or not for >dataproviders supporting it. We could have a global
>>> >> option for that default >too. >Vincent
>>> >>
>>> >>
>>> >> _______________________________________________
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>>> >> [email protected]
>>> >> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>
>>>
>>>
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>>>
>>
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>
>
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