Thank you all for you replies.
Well I agree with all the comments made here : ice lacks a whole lot of
things to replace Qgis rendering, and switching the rendering backend
might be a very complex and time consuming task (that is almost the 1st
thing I told Paolo). Moreover, Ice focuses on being efficient for
rendering : that means a whole bunch or things are locked within Ice
code (for instance, Ice takes care of reading data from the hard drive).
Still, if you are getting into pure OpenGl rendering someday, and
looking for responsive features, Ice can be a good source of
inspiration. it's not rocket science, just a few things to keep in mind
(in addition to tile caching and multi-resolution) : let the GPU take
care of everything it can, including all contrast changes and
reprojection, and avoid heavy operations (like HDD to RAM or RAM to GPU
transfert) whenever it is possible.
It looks simple, but took me a while and a few tries with Monteverdi
previous rendering engines, which were not that good, to come up with
and combine all these ideas.
Le 22/07/2015 21:26, Tim Sutton a écrit :
Hi
On 22 Jul 2015, at 14:52, Paolo Cavallini <cavall...@faunalia.it
<mailto:cavall...@faunalia.it>> wrote:
Il 22/07/2015 11:48, Julien Michel ha scritto:
Hi Qgis developers,
I wrote a small library called Ice which is able to render raster (and
Hi all,
I have seen ti in action during the recent FOSS4G, and I have been
really impressed by its speed and capabilities. I think it would be a
grat addition to QGIS, as either a main or alternative renderer.
As nice as the idea is, I think it will be quite a massive undertaking
and we would break all the beautiful (ok and ugly) cartography that
people have come up with using the rich array of rendering styles that
QGIS currently has. I would also like to see a native OpenGL renderer
one day so that we can start to thing about native 3D support. Maybe
it would be nice to make a patch that lets you swap between Qt
rendering backend and Ice, but honestly its probably a lot of work and
may just fade away like the old mapnick renderer did…
Regards
Tim
All the best.
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QGIS & PostGIS courses: http://www.faunalia.eu/training.html
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