QPainterPath和cubicTo，光滑线

Question

我试图通过平滑的线连接点，如图像所示。

怎样才能像图像中所示的那样得到平滑的线条？

QPainterPath myPath(A);
myPath.cubicTo(A,A,B);
myPaht.cubicTo(B,B,C);
myPath.cubicTo(C,C,D);
myPainter.drawPath(myPath);

图片：- http://postimg.org/image/44vh9m2ur/

Answer 1

我写了这段代码，得到了类似的结果

QPainterPath myPath(QPointF(50,50));//start point
myPath.cubicTo(60,25,80,80,90,60);  //set another points

scene->addPath(myPath,QPen(Qt::red));//I use graphicsscene, but you can use, what you want
ui->graphicsView->setScene(scene);
ui->graphicsView->show();