Re: Trying to IsA a PolyMesh

["Andrew Nicholas" <andy(at)andynicholas.com>]

Hi Alan,

You might want to check what class of object you're starting with by using
the GetClassIDName() method. Sometimes you won't always have what you
think you should have. I've been caught out a few times by this.

The code below obtains the PolygonMesh object from a polymesh input
connection of a SCOP:


   XSI::InputPort polyMeshPort(op.GetPort(L"polymshIn",L"Group_0",0));
   XSI::Primitive primitive(polyMeshPort.GetValue());

   //Get geometry object from primitive
   XSI::Geometry geometry(primitive.GetGeometry());

   //Check that the geometry is actually a polygon mesh
   if(!geometry.IsA(XSI::siPolygonMeshID)) return XSI::CStatus::Fail;

   //Create the polygon mesh object
   XSI::PolygonMesh polyMesh(geometry);

Hope this helps.

Cheers

Andy





> When I run .IsA on a poly mesh it tells me it's an X3DObject - so I
> try getting the activeprimitive of it and it tells me it's a
> primitive.
>
> Any idea why I'm getting non-specific types? This is in C++
>
> 		CRef item = app.GetSelection().GetItem(0) ;
> 		if (item.IsA(siPolygonMeshID) ) {
> 			//nope it says it's not...
>
> Thanks,
>
> Alan.
>
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