I have a QList
consist of QVector3D
. A QVector3D
represents a vertex or a point. This List holds also all vertices of a STL-File
. The problem is that a vertex exist multiple times in the list. In need a list of the unique vertices of a STL-File. How can i implement it with Qt 5.0.2
?
QSet uses a hash-function for ensuring the uniqueness of the value (QMap uses operator <) There is no qHash implementation for QVector3D in Qt. You could implement your own one e.g. as in example:
//place anywhere in Qt-code
#include <QSet>
#include <QVector3D>
#include <QList>
uint qHash(const QVector3D &v)
{
return qHash( QString( "%1x%2x%3" ).arg(v.x()).arg(v.y()).arg(v.z()) ) ;
}
int foo()
{
QList<QVector3D> uvector3D_1;
QSet<QVector3D> uvector3D_2;
uvector3D_2 = QSet<QVector3D>::fromList(uvector3D_1);
return 0;
}
static int testFoo = foo();
Of cause it is not the fastest one, it relies on Qt's function qHash for QString. But I think it's good for demonstration.