Hi Andrew,
I'm transforming a mesh (point by point) using the data on a particle.
So the rotation is a CVector3 as is the position and size is a double.
So not looking to go between spaces - the origin of the meshes space
will be shifted to the particle's.
Cheers,
Alan.
On 7/18/05, Andrew Nicholas <andy(at)andynicholas.com> wrote:
> Hi Alan,
>
> It depends on what you're doing. Could you give a bit more info? What is
> it that you are transforming i.e. a point, vector, normal, matrix, etc?
> Are you trying to go from local space to world, or the world to local
> using the inverse global matrix? Or are you just concatenating transforms?
>
>
>
> > Hi Andy,
> >
> > Thanks - most appreciated. I've been accessing it within a custom
> > parameter. Though I've got another vaguely related question.
> >
> > Does the matrix multiply operation rotate before translation?
> >
> > Cheers,
> >
> > Alan.
> >
> > On 7/18/05, Andrew Nicholas <andy(at)andynicholas.com> wrote:
> >> 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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