[vtkusers] seam around texture

[David Gobbi]

Why not just use vtkImageActor and let it take care of the tiling?

I'm not fond of vtkTransformTextureCoords myself, I've found it's
more trouble than it's worth.  It's easier to build the vtkPolyData
manually and set its attributes directly.  Another option is to write
a custom polydata source, I've done this lots of times in order to
get exactly what I need for a particular job.

 - David


On Fri, Jan 13, 2012 at 9:38 AM, Sebastien <sebastien.calvi at yahoo.com> wrote:
> Hello David,
>
> Thank you for your past answer.
>
> You wrote:
>  Then your texture coordinates at the corners of your planes be set so
> to 0.5/N (where N is the texture width) at let left and at (1.0 -
> 0.5/N) at the right.  Se each "seam" cuts a row of pixels down the
> middle, and these seams should be invisible if your geometry is set
> correctly.
>
> How can I do that?
> So far I use vtkPlaneSource to set my geometry and I have found out that
> there is vtkTransformTextureCoords which seems to be a good filter to do
> what you said but it has only SetScale(...), SetOrigin(...),
> SetPosition(...) and AddPosition(...). How can I set these extra coords of
> 0.5/N?
>
> If I keep insisting in that direction it is because I might (surely) have to
> deal with BIG pictures, big pictures that I have to create myself, big
> enough at least to consider having to tile them... And it might turn into a
> commercial application (lets hope :D) so as long as the
> vtkImageResliceMapper is not available from a standard release I can't
> really use it :(