How to draw a semi circle or arc of ellipse

[parnedo]

Hi i'm getting crazy looking how to draw an arc of circle or arc of ellipse but without connecting the actual position with the start of the circle.

I'm using QPainterPath and the function arcTo. But arcTo adds a line from the origin to the begin of the curve.

instead of :
__
\__/

I want

\__/

Without the line (radious)

How can i make only a curve ??

Thanks

[wysota]

I'd say you should use QPainterPath::arcMoveTo().

[parnedo]

Thank you.
I less a little example for other people

#include <QApplication>
#include <QGraphicsEllipseItem>
#include <QGraphicsScene>
#include <QGraphicsView>
 
int main( int argc, char **argv )
{
    QApplication app(argc, argv);
    QGraphicsScene scene;
 
    scene.setSceneRect( -100.0, -100.0, 200.0, 200.0 );
 
    QPainterPath* path = new QPainterPath();
    path->arcMoveTo(0,0,50,50,20);
    path->arcTo(0,0,50,50,20, 90);
 
    scene.addPath(*path);
 
    QGraphicsView view( &scene );
    view.show();
    return app.exec();
}

#include <QApplication>
#include <QGraphicsEllipseItem>
#include <QGraphicsScene>
#include <QGraphicsView>

int main( int argc, char **argv )
{
    QApplication app(argc, argv);
    QGraphicsScene scene;

    scene.setSceneRect( -100.0, -100.0, 200.0, 200.0 );

    QPainterPath* path = new QPainterPath();
    path->arcMoveTo(0,0,50,50,20);
    path->arcTo(0,0,50,50,20, 90);

    scene.addPath(*path);

    QGraphicsView view( &scene );
    view.show();
    return app.exec();
}

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