2013/10/24 Vincent Picavet <[email protected]> > Hello, > > Le jeudi 24 octobre 2013 09:54:06, kimaidou a écrit : > [..] > > > In web mapping contexts, major improvements are made in 2D vector > rendering > > speed by using WebGl technology, such as in upcoming OpenLayers 3. As a > > user point of view, improvement seems huge compared to classical DOM or > > more advanced CANVAS renderer. > > > > What about using graphic card to help improve rendering performance in > QGIS > > ? Would this help a lot, or at the contrary would this be a dead-end ? > > We would probably begin with porting QGIS to QT5, as OpenGL support has > been > added to QT5 and improved in 5.1. > See for example : > http://qt-project.org/doc/qt-5.0/qtopengl/2dpainting.html > > Otherwise, reimplementing an pure OpenGL rendering engine seems a big > effort. > And we still would want to have a classic renderer for non-accelerated > hardware. >
Thanks for this ressource page about qt5 I agree with you : why reinvent the wheel if QT5 proposes needed and mature tools. I just hope porting QGIS to Qt5 won't be so hard that it would postpone it to 3.0 though :) Have any discussions begun on this topic among QGIS devs ? > > One really interesting thing is that it would open the door for viewing 3D > objects in QGIS. As for now to be able to see PostGIS 3D objects we had to > develop our own external 3D viewer (horao). For that to happen we would > need > real 3D geometry support in QGIS too. > Exactly, I have seen your video for Lyon town project, this is great ! I can only imagine what a speed improvement it would bring for "simple" 2D painting !
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