Thanks, I will keep all of that in mind while I design my class.
___________________________________________________________
Mike Jackson www.bluequartz.net
On Mar 4, 2010, at 8:56 AM, David E DeMarle wrote:
The normals array, that is the one that is used by default in shading
by the graphics pipeline and a few other filters, is whatever one is
designated as the active normals via
vtkDataSetAttributes::SetNormals(). I do not think the array's name
matters at all.
You probably do not want to store the color information in the active
vectors array, unless you want filters to treat it like a vector, ie
you want to do things like orient glyphs or trace streamlines with it.
Storing it as the scalars is probably better, especially if it is an
unsigned char array, because VTK will color by the active scalars
array by default if the scalars array happens to be unsigned char
(either one - grayscale - or three - rgb - components wide)
David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109
On Mon, Feb 22, 2010 at 4:35 PM, Michael Jackson
<[email protected]> wrote:
I am in the early stages of designing a new filter that is supposed
to color
triangles based on their normal where the normal is used as an
input to the
filter and a unique color is output for each triangle.
My questions are:
Where should I store the color information? As a new set of
"Scalars" or
as Vectors as attribute data for the cells? Also, is there a
"Standard" that
is used to store the Normals for Polygonal data (vtkPolyData)? Are
they
always in an attribute data array called "Normals"? I was thinking
I need to
check first to see if the correct type of normals are included
already and
if not then generate the normals during the filter.
Thanks for any help or suggestions.
___________________________________________________________
Mike Jackson www.bluequartz.net
Principal Software Engineer [email protected]
BlueQuartz Software Dayton, Ohio
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