Faster AIS_Lines

Hi,

try to collect a TopoDS_Compound and display it.

Best regards,

Commenter-1 Müller

Thanks Patrik,
I thought of that, but I have also Points which I haven't found how to add, as I have some attributes that comes with the objects, it would be messy to handle it in compounds, maybe to inherit from AIS_Object and write directly in OpenGL. By any chance any idea how to do that?

Hi,

can you give more informations (if you don't wan so write it to the forum post an email)?
I haven't tried using OpenGL directly in an AIS context (but that would be a nice idea).

Commenter-1

Hi Patrik
give me some time with Angels idea. I'll let you know if I discover something.
Cheers Author

Hi Author,
Maybe you can append your "AIS_Line" to "AIS_ListOfInteractive" and Display like as following:

// Obj_List is AIS_ListOfInteractive
AIS_ListIteratorOfListOfInteractive it;

for (it.Initialize(Obj_List); it.More(); it.Next())

{
myAISContext->DisplayedObjects(Obj_List,Standard_False);
}
myAISContext->UpdateCurrentViewer();

Sincerely,
Commenter-2

Hi Angel,
thanks for your valuable input, I changed the code to the following:

AIS_ListOfInteractive
Obj_List;
AIS_ListIteratorOfListOfInteractive it;

for(int i=0;iais_obj);
}

for (it.Initialize(Obj_List); it.More(); it.Next())

{
myAISContext->DisplayedObjects(Obj_List,Standard_False);
}
myAISContext->UpdateCurrentViewer();

its fast but it doesn't show anything as I left out the display of the lines. Do I need to do something more?
Cheers
Author

Hi Author ,
Sorry, I have a mistake for
"myAISContext->DisplayedObjects(Obj_List,Standard_False);", and it should be myAISContext->Display(Obj_List,Standard_False);".

Sincerely,
Commenter-2

Hi Angel
If I try to display the list directly, it gives me a syntax error. So I changed to the following, which works but is slow again.

myAISContext->Display(it.Value(),Standard_False);

Thanks for your help so far.
Author

Hi Author,

trying it this way makes no difference to the "standard way" displaying interactive objects. You can get all actual interactive objects via "AIS_ListOfInteractive".
So instead of having thousands of lines collect them to a TopoDS_Compound and display this compound.
You see it in AIS_ListOfInteractive. You have only one AIS_Object more in the list.

Greets to Switzerland,
Commenter-1 Müller

Hi Author,
You can try as following:
// Obj_List is AIS_ListOfInteractive
AIS_ListIteratorOfListOfInteractive it;
for (it.Initialize(Obj_List); it.More(); it.Next())

{
Handle(AIS_InteractiveObject) aAisShape = it.Value();
myAISContext->Display(aAisShape,Standard_False);
}
myAISContext->UpdateCurrentViewer();

Sincerely,
Commenter-2

Hi,

once again, the only way to have your display faster is to create your own class inheriting from AIS_InteractiveObject and draw the primitives using the low level functions from the Graphic3d package ( Graphic3d_Group )

You can check the pdf document about visualisation to see how it's working.
Read also the code in AIS_Line.cxx

HTH