[vtkusers] Point order of faces in a cell

[Paul Edwards]

Thanks again!


On 20 February 2014 15:58, Bill Lorensen <bill.lorensen at gmail.com> wrote:

> I think just Voxel and Pixel.
>
> I believe they all are anti-clockwise.
>
>
> On Thu, Feb 20, 2014 at 10:34 AM, Paul Edwards <paul.m.edwards at gmail.com>
> wrote:
> > Hi Bill,
> >
> > Thanks for the reply.  I was hoping to be able to deal with just the
> vtkCell
> > API rather than need to check a SafeDownCast for each of the derived
> > types...   Do you know if it is just vtkVoxel that is like this?  Also,
> is
> > there any requirement for the direction of the points for the ones that
> do
> > order the points around the polygon - either clockwise/anticlockwise?
> >
> > Thanks,
> > Paul
> >
> >
> > On 20 February 2014 15:13, Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
> >>
> >> Each face for a voxel is returned with a pixel's point ordering. They
> >> need to be traversed as you would a pixel.
> >> Figure 5-2 in the VTK book shows the ordering.
> >>
> >> I also found a figure on this page:
> >> http://vislab.eas.ualberta.ca/VisLab/Data.aspx
> >>
> >> Bill
> >>
> >> On Thu, Feb 20, 2014 at 9:47 AM, Paul Edwards <paul.m.edwards at gmail.com
> >
> >> wrote:
> >> > Hi,
> >> >
> >> > I had assumed (wrongly) that the point order for a face when calling
> >> > vtkCell::GetFace would traverse the edges and make up the polygon for
> >> > that
> >> > face.  Is it a bug that this isn't the case for vtkVoxel?  Or, is
> there
> >> > a
> >> > another way I can do this?
> >> >
> >> > Thanks in advance,
> >> > Paul
> >> >
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> >>
> >> --
> >> Unpaid intern in BillsBasement at noware dot com
> >
> >
>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com
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