72     QVector<QPolygonF> *translateRings( 
const QVector<QPolygonF> *rings, 
double dx, 
double dy ) 
const;
 
Contains information about the context of a rendering operation.
double ANALYSIS_EXPORT angle(QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *p4)
Calculates the angle between two segments (in 2 dimension, z-values are ignored)