Re: [Interest] Performance of QGraphics[View Scene] changes with zoom

2016-05-21 Thread Lisandro Damián Nicanor Pérez Meyer
On Friday 20 May 2016 07:14:15 Uwe Rathmann wrote: > On Wed, 18 May 2016 15:57:04 -0300, Lisandro Damián Nicanor Pérez Meyer > > wrote: > > Now if I add a lot of straight lines (QGraphicsLineItem instances) > > performance (number of movements seen on screen per second) varies > > according the

Re: [Interest] Performance of QGraphics[View Scene] changes with zoom

2016-05-20 Thread Uwe Rathmann
On Wed, 18 May 2016 15:57:04 -0300, Lisandro Damián Nicanor Pérez Meyer wrote: > Now if I add a lot of straight lines (QGraphicsLineItem instances) > performance (number of movements seen on screen per second) varies > according the zoom. If I zoom in I get to a point in which everything is > too

Re: [Interest] Performance of QGraphics[View Scene] changes with zoom

2016-05-18 Thread Lisandro Damián Nicanor Pérez Meyer
On 18 May 2016 at 15:57, Lisandro Damián Nicanor Pérez wrote: > Before I try to code a stripped-down version of my issue I would like to > describe it in case I'm missing something obvious. > > I have an app with a QGraphicsScene that holds a vehicle which is constantly >

[Interest] Performance of QGraphics[View Scene] changes with zoom

2016-05-18 Thread Lisandro Damián Nicanor Pérez Meyer
Before I try to code a stripped-down version of my issue I would like to describe it in case I'm missing something obvious. I have an app with a QGraphicsScene that holds a vehicle which is constantly moving at a fixed rate (~10 times per second). Every time it moves it draws some polygons