Problems controlling default drawing

cjwere's picture
cjwere
Wed, 05/06/2020 - 05:42
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Other usage issues

Hi, I am trying to change my selection colour I have found examples to turn on edge drawing via SetFaceboundaryDraw(true)..., and this was working as expected in OCC7.0.0, but I have now upgraded to 7.4.0 and the edge color is not being set, but width is. Similarly I have tried setting a SelectionStyle, but it is having no effect (colour is sort of grey and just a little thicker than normal edge drawing) As an experiment I tried changing the HighlightColor as well, this also has no effect, as I mouse over items I get a cyan highlight. I am new to this and I might be missing something obvious (I hope!).

 

Thanks,

Chris Were

myViewer->UpdateLights();

myViewer->SetLightOn();

myViewer->SetDefaultShadingModel(V3d_PHONG);

myAISContext->SetDisplayMode(AIS_Shaded, true);



//activate boundary edges at the global level

myAISContext->DefaultDrawer()->SetFaceBoundaryDraw(true);

myAISContext->DefaultDrawer()->FaceBoundaryAspect()->SetColor(Quantity_NameOfColor::Quantity_NOC_RED);

myAISContext->DefaultDrawer()->FaceBoundaryAspect()->SetWidth(1.2);

myAISContext->DefaultDrawer()->SetAutoTriangulation(false);//turnedAutoTriangulation off, so must call  BRepMesh_IncrementalMesh manually



const Handle(Prs3d_Drawer) aHilightStyle = new Prs3d_Drawer();

aHilightStyle->SetColor(Quantity_NameOfColor::Quantity_NOC_RED);

myAISContext->SetHighlightStyle(aHilightStyle);



const Handle(Prs3d_Drawer) selectionStyle = new Prs3d_Drawer();

selectionStyle->SetColor(Quantity_NameOfColor::Quantity_NOC_YELLOW);

myAISContext->SetSelectionStyle(selectionStyle);

 

 

cjwere's picture
cjwere
Mon, 05/11/2020 - 05:32

More information, it is working initially, but breaks when I activate face selection mode.

I have simplified it so setting my selection and highlighting color is simply done by:

			myAISContext->HighlightStyle()->SetColor(Quantity_NameOfColor::Quantity_NOC_YELLOW);
			myAISContext->SelectionStyle()->SetColor(Quantity_NameOfColor::Quantity_NOC_CYAN1);

And this works OK, as expected.  However as soon as the below is called to change the selection mode, selection and highlighting seems to revert to the default behaviour :

myAISContext->Deactivate();
myAISContext->Activate(AIS_Shape::SelectionMode(TopAbs_FACE));

... even if I reset the selection and highlighting to my colors as above immediately afterwards.

I've spent a couple of days on this so far and am clearly missing something!!!!  Any help is very much appreciated.

Regards,

Chris

cjwere's picture
cjwere
Mon, 05/11/2020 - 06:11

Finally found it after digging in forum, and then through the tcl script and code for vselprops.  I did not realize HighlightStyle() had overloads for a particular style, and its a little obscure (to me), and that activating face selection mode changed to a local selection/highlighting. 

Anyway, this works:

//Local selection and highlighting, for face selection
myAISContext->HighlightStyle(Prs3d_TypeOfHighlight_LocalDynamic)->SetColor(Quantity_NameOfColor::Quantity_NOC_YELLOW);
myAISContext->HighlightStyle(Prs3d_TypeOfHighlight_LocalSelected)->SetColor(Quantity_NameOfColor::Quantity_NOC_RED);