Hi, On Monday 14 Dec 2015 17:36:55 Nye wrote: > Hello Sean, > Thanks, that mostly clears things up. Only one additional question: > How are they normalized, to the window/opengl surface size that I have > passed to the aspect engine?
It's normalised to the [1,1] based purely upon sensitivity rather than pixel size of the surface. The respective code is in mousecontroller.cpp, in the function updateMouseEvents(): m_mouseState.xAxis = m_sensitivity * (e.screenPos().x() - m_previousPos.x()); m_mouseState.yAxis = m_sensitivity * (m_previousPos.y() - e.screenPos().y()); The xAxis and yAxis values are later clamped to [-1, 1]. So setting the sensitivity to 0.1 means you have to move 10 pixels in a frame to get an axis value of magnitude 1. Of course once you have the axis value you can scale or transform it how you like. Cheers, Sean > > Kind regards. > > On Mon, Dec 14, 2015 at 3:11 PM, Sean Harmer <sean.har...@kdab.com> wrote: > > On Monday 14 Dec 2015 12:30:40 Nye wrote: > > > Hello, > > > I understood (by trial and error) that in the axisValueChanged signal I > > > > get > > > > > a relative offset. I incorrectly assumed it was an absolute value. Is it > > > scaled or bound somehow, in example to the screen resolution, or is the > > > value absolute (I'm using it with a mouse device)? Additionally, I'd > > > like > > > to know what is the measurement used, does it come in pixels, or some > > > arbitrary units? > > > > The values are normalised units [-1, 1]. How these are mapped from pixel > > offsets reported by the windowing system is controlled by the sensitivity > > property on the MouseController. > > > > Cheers, > > > > Sean > > > > -- > > Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK > > KDAB (UK) Ltd, a KDAB Group company > > Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 > > Mobile: +44 (0)7545 140604 > > KDAB - Qt Experts -- Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK KDAB (UK) Ltd, a KDAB Group company Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 Mobile: +44 (0)7545 140604 KDAB - Qt Experts _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
