[vtkusers] VTK Anisotropic Texture Filtering / MipMaps / reducing texture aliasing

[Berti Krüger]

Hello Ken,
thank you very much again for your help. 

With VTK 8.1.0rc everything works perfectly.

But since it is only a release candidate (which might not work
completely ok in all situations), do you know roughly when there will
be a final release version of VTK 8.1?


Another thing: I use VTK together with Qt via the QVTKWidget in my
application and when i run it, i now get the following deprecation
warning:

"QVTKWidget was deprecated for VTK 8.1 and will be removed in a future
version."

What is the proper replacement for QVTKWidget? (I installed
libqtvtkwidget in the Qt Designer and simply dragged it on the form,
it was the only vtk related widget there).


Thanks again,
Berti



> Yes, the feature was added recently - Ken
> 
> On Sun, Nov 26, 2017 at 2:32 AM, Berti Krüger
> <berti_krueger at hotmail.com> wrote:
> 
> > Hello Ken,
> > thank you very much for your reply.
> >
> > If I understand you correctly the developer macros you have shown in
> > your reply should automatically generate an accessor / mutator
> > method called "SetMipmap(bool flag)" in the vtkTexture class.
> >
> > Unfortunately i could not find such a method in the actual release
> > versions of VTK (e.g. version 7.1.1 or 8.0.1).
> >
> >
> > Only in the upcoming VTK 8.1.0rc version there are:
> >
> > virtual bool    GetMipmap ()
> > virtual void    SetMipmap (bool)
> > virtual void    MipmapOn ()
> > virtual void    MipmapOff ()
> >
> > which seems to be what i need.
> >
> >
> > Did i understand you wrong (i am sorry if this is a stupid question
> > but i am new to vtk) ?
> >
> >
> > Thank you very much in advance,
> >
> >
> > Berti
> >
> >
> >
> > Von: Ken Martin <ken.martin at kitware.com>
> > Gesendet: Samstag, 25. November 2017 14:29
> > An: Berti Krüger
> > Cc: vtkusers at vtk.org
> > Betreff: Re: [vtkusers] VTK Anisotropic Texture Filtering /
> > MipMaps / reducing texture aliasing
> >
> >
> > Try turning on mipmaps for your texture before you render them.
> > Support for them was added a while back. That should help some.
> >
> >
> >
> >   //@{
> >   /**
> >    * Turn on/off use of mipmaps when rendering.
> >    */
> >   vtkGetMacro(Mipmap, bool);
> >   vtkSetMacro(Mipmap, bool);
> >   vtkBooleanMacro(Mipmap, bool);
> >   //@}
> >
> >
> >
> >
> > On Sat, Nov 25, 2017 at 2:08 AM, Berti Krüger
> > <berti_krueger at hotmail.com> wrote:
> >  Hello Everyone!
> >
> > I'm currently making a visualization program where I've got a
> > groundplane with a fine detailed checkerboard-like texture on it.
> > The whole scene can be zoomed in and out. Since the resolution of
> > the VTK-render window and the texture differ quite a bit, i get a
> > lot of aliasing.
> >
> > In plain opengl i would use mipmaps and/or anisotropic filtering to
> > get rid of it but unfortunately i haven't found anything in the
> > vtk-texture class to archive this.
> >
> > For whole screen antialiasing i am already using the fxaa
> > filter which works really nice and helps also a little bit with
> > texture-aliasing but is of course not a replacement for
> > resolution dependend texture-filtering.
> >
> > So my question is, how to reduce aliasing in VTK with fine-detailed
> > textures?
> >
> >
> > Thank you very much in advance,
> >
> > Berti
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> >
> >  --
> >
> >
> >
> > Ken Martin PhD
> > Distinguished Engineer
> > Kitware Inc.
> >
> > 28 Corporate Drive
> > Clifton Park NY 12065
> >
> >
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