Issue with QPolygonF and QGraphicsPolygonItem (brought a picture)

Pippin

Hello,

I seem to be having this unwanted black segment when drawing triangles. Here's what I did with the QPolygonF:

qreal root = qSqrt(3)/2;

QPolygonF DownwardTriangle = QPolygonF(3);
DownwardTriangle << QPointF(root, .5)*80 << QPointF(-root, .5)*80 << QPointF(0, -1)*80 << QPointF(root, .5)*80;

and here's how I added it to the QGraphicsScene:

auto foo = WindowScene.addPolygon(DownwardTriangle, QPen(), GrayBrush);
foo->setPos(100, 100);

I tried both fillRules but I got the black segment (from the top-right corner to the center of the triangle) in both cases regardless. I can't get rid of it. The top-right corner matches the first and last QPointF that I stored inside DownwardTriangle (which is QPointF(root, .5)*80).

Any help would be appreciated. Thank you.

Devopia53

Hi

U have a garbage points.

QPolygonF DownwardTriangle = QPolygonF(3);
<-- U must delete "QPolygonF(3)"

Pippin

@Devopia53

Thank you! The problem disappears if I drop the = QPolygonF(3); :)