How to draw lines in Qt3D

[fireking]

how do I draw lines instead of solid quad in Qt3d.

I want to use a sceneNode->draw( painter )...

but sceneNode->setDrawingMode(QGL::Lines) doesn't seem to do anything...

Looking at example code below, how would I get it to draw lines?

@
float vertices[12] =
{
-1.0, -1.0, -1.0, // A
1.0, -1.0, -1.0, // B
1.0, 1.0, 1.0, // C
-1.0, 1.0, 1.0 // D
};
QGLBuilder quad;
QGeometryData data;
data.appendVertexArray(QArray<QVector3D>::fromRawData(
reinterpret_cast<const QVector3D*>(vertices), 4));
quad.addQuads(data);
@

[fireking]

OK, still no luck, reverting to openGL only and all I have are black lines...

@
void CubeView::drawGrid()
{
int loop1, loop2;
const int gridSize = 31;

glColor3f(1.0,0.50,0.50);   // Set my lines colour...
glLineWidth(2.0);
glDisable(GL_LINE_SMOOTH);

for ( loop1 =0; loop1<gridSize; loop1++)
{
    for ( loop2=0; loop2<21; loop2++)
    {
        // Draw Horizontal lines...
        if ( loop1<gridSize-1)
        {
            glBegin(GL_LINES);
            glVertex3f(-40+(loop1*5),0.0,-40+(loop2*5));
            glVertex3f(40+(loop1*5),0.0,-40+(loop2*5));
            glEnd();
        }
        // Draw vertical lines...
        if (loop2<gridSize-1)
        {
            glBegin(GL_LINES);
            glVertex3f(-40+(loop1*5),0.0,-40+(loop2*5));
            glVertex3f(-40+(loop1*5),0.0,40+(loop2*5));
            glEnd();
        }
    }
}
glFlush();

}
@

What am I missing to get coloured lines????