QTransform rotate and scale order

[qlands]

Hi,

I have an application that applies transformations to QGraphicsPolygonItems.

The working code is:


QTransform trans;
trans = trans.rotate(formerRotation);
trans = trans.scale(currentXFactor,currentYFactor);
setTransform(trans,false); //Replaces the tranformation


However if I first scale and then rotate the result is completely different as rotating and then scaling.

Any idea why?

[SixDegrees]

Because the transformations are applied one at a time, in the order given, and the order in which transformations are applied makes a difference.

[qlands]

Cool, Thanks.