The fastest way to communicate a Qvector<float> witrh Qvector<QpointF> ??

[tonnot]

Can anybody give me a schema to do the fastest conversion betwen

QVector<float>
or float []

to-from Qvector<QPointF> ????

Thanks

[yeye_olive]

QPointF being essentially a pair of floating-point numbers, it is unclear what kind of conversion you want to do. Please specify it.

[wysota]

Can anybody give me a schema to do the fastest conversion betwen

QVector<float>
or float []

to-from Qvector<QPointF> ????

Thanks

QVector<float> vf;
QVector<QPointF> vp;
foreach(float f, vf) {
  vp << QPointF(f,f); // or whatever else you want
}

QVector<float> vf;
QVector<QPointF> vp;
foreach(float f, vf) {
  vp << QPointF(f,f); // or whatever else you want
}

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[tonnot]

And there is no way to do a mem copy operation ?
The information of origin - destiny are going to be the same 10 floats >>> 5 QfointF (in example )
Any idea ?

[yeye_olive]

And there is no way to do a mem copy operation ?
The information of origin - destiny are going to be the same 10 floats >>> 5 QfointF (in example )
Any idea ?

No, you must not perform a raw memory copy. Use a loop to transform the elements as wysota suggested. I do not understand what you mean by "origin" or "destiny". Do you mean that the (2 * i)th and (2 * i + 1)th elements of the Qvector<float> should be cast to -- qreal being typedef'd to double or float depending on the architecture --, respectively, the x and y fields of the ith element of the Qvector<QPointF>?

[wysota]

And there is no way to do a mem copy operation ?
The information of origin - destiny are going to be the same 10 floats >>> 5 QfointF (in example )
Any idea ?

float is a POD, QPointF is a full class. You should know what the implications are.