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

[Berti Krüger]

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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28 Corporate Drive
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