Hello, I want to draw arrows to represent the direction of surface normal vector. And I took the https://dev.opencascade.org/content/arrow-representation and https://dev.opencascade.org/doc/occt-7.5.0/refman/html/class_prs3d___arrow.html as reference (my OCCT version is 7.5.0).
However, I don't know how to new the Prs3d_Presentation object, the second line of code can't work (aCtx->CurrentViewer() doesn't have member function Viewer())
Handle(Prs3d_Presentation) aPresentation = new Prs3d_Presentation (aCtx->CurrentViewer()->Viewer());
Prs3d_Arrow::Draw(aPresentation, Point, Dir, angle, length);
Can anyone give me suggestion. Thanks a lot.