Wed, 08/21/2002 - 15:39
Forums:
I have tausends of AIS_Lines to display, OCC gets very slow after a few 1000 Lines. Does anybody have a solution to display faster AIS_Objects?
Thanks in Advance!
Martin
Collaborative development portal
Wed, 08/21/2002 - 15:48
Hi,
try to collect a TopoDS_Compound and display it.
Best regards,
Patrik Müller
Wed, 08/21/2002 - 15:56
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?
Thu, 08/22/2002 - 08:09
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).
Patrik
Mon, 08/26/2002 - 10:38
Hi Patrik
give me some time with Angels idea. I'll let you know if I discover something.
Cheers Martin
Fri, 08/23/2002 - 02:49
Hi Martin,
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,
Angel
Sun, 08/25/2002 - 23:04
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
Martin
Mon, 08/26/2002 - 02:58
Hi Martin ,
Sorry, I have a mistake for
"myAISContext->DisplayedObjects(Obj_List,Standard_False);", and it should be myAISContext->Display(Obj_List,Standard_False);".
Sincerely,
Angel
Mon, 08/26/2002 - 10:55
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.
Martin
Mon, 08/26/2002 - 11:01
Hi Martin,
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,
Patrik Müller
Mon, 08/26/2002 - 11:32
Hi Martin,
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,
Angel
Mon, 08/26/2002 - 14:52
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