[Interest] Applying transformation

[Sean Harmer]

On Wednesday 05 April 2017 16:30:52 Igor Mironchik wrote:
> Hi,
> 
> 05.04.2017 16:12, Sean Harmer пишет:
> > On Wednesday 05 April 2017 15:55:48 Igor Mironchik wrote:
> >> Hello,
> >> 
> >> Can I apply Qt3DCore::QTransform to the QVector3D?
> >> 
> >> How can I calculate new QVector3D if Qt3DCore::QTransform will be
> >> applied to it, in other words?
> > 
> > The transformation is stored in the matrix property. Pre-multiply your
> > vector by the matrix to get the resulting transformed vector:
> > 
> > v' = M v
> 
> Sorry for my question. But what the difference between M v and v M?

We treat v as a column vector, so we pre-multiply by the matrix M.

Cheers,

Sean

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