[vtkusers] surface expansion

[Richard Brown]

Thanks for the help.

I’m looking at vtkWarpVector examples, however, and both of them are simply: 

	warp = vtk.vtkWarpVector()
	warp.SetInputConnection(p2c.GetOutputPort())

and:

	warp = vtk.vtkWarpVector()
	warp.SetInputConnection(castToUnstructuredGrid.GetOutputPort())

I can’t figure out how to apply this class to my needs. Is there an example anywhere that I can use?

Regards,
Richard


> On 18 Apr 2016, at 20:11, David Gobbi <david.gobbi at gmail.com> wrote:
> 
> In order to get vtkWarpVector to use the normals, it might need this:
> 
> warpvector->SetInputArrayToProcess(0, 0, 0,
>   vtkDataObject::FIELD_ASSOCIATION_POINTS,
>   vtkDataSetAttributes::NORMALS);
> 
> 
> On Mon, Apr 18, 2016 at 11:57 AM, Bill Lorensen <bill.lorensen at gmail.com <mailto:bill.lorensen at gmail.com>> wrote:
> vtkWarpVector
> 
> 
> On Mon, Apr 18, 2016 at 12:53 PM, mbcx9rb9 <richard.j.brown at live.co.uk <mailto:richard.j.brown at live.co.uk>> wrote:
> > I've seen this asked a few times, but I haven't seen an answer for what seems
> > like a relatively simple task.
> >
> > How do I go about expanding a surface by a given value (adding the value as
> > opposed to multiplying a scaling factor).
> >
> > Is there a class for this?
> >
> > The logic seems pretty straightforward:
> > for each point
> >      new point = point + distance*normal
> > end for
> >
> > Thanks in advance for any help,
> > Richard

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