drawing clothoid segments

[schmimona]

When you were saying plotting curves myself did you have some method in mind? Or were you referring to the QWT library?

[SixDegrees]

Either way. You can plot points (or, more likely, line segments) in QPainter, or you can embed a Qwt plot in your UI.

[Cruz]

Parameterize your clothoid curve such that you can obtain the x(t) and y(t) coordinates for a parameter t in [0:1] where 0 is the starting point and the 1 is the last point of your curve. Then you can simply draw your curve in the paint event of a widget like this:

void SimpleExampleWidget::paintEvent(QPaintEvent *)
{
     QPainter painter(this);
     painter.setPen(Qt::blue);
 
     for (double t = 0; t <= 1; t = t+0.01)
          painter.drawLine(QLineF(x(t), y(t), x(t+0.01), y(t+0.01));
}

void SimpleExampleWidget::paintEvent(QPaintEvent *)
{
     QPainter painter(this);
     painter.setPen(Qt::blue);

     for (double t = 0; t <= 1; t = t+0.01)
          painter.drawLine(QLineF(x(t), y(t), x(t+0.01), y(t+0.01));
}

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