[Paraview-developers] Anti-aliasing of triangles

[Ken Martin]

I was thinking SSAA , aka render into an FBO at sqrt(3)*width by
sqrt(3)*height for example and then down sample back to the window size,
for picking just bypass it.  I have looked into FXAA, CMAA, but both those
approaches are typically faster, but have more complex implementations and
are subject to artifacts (CMAA is better on artifacts but the
implementation is more complex). A first step could be to use it for the
 non-interactive renders in PV.



Ken







Ken Martin PhD

Chairman & CFO

Kitware Inc.

28 Corporate Drive

Clifton Park NY 12065

ken.martin at kitware.com

919 869-8871 (w)





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*From:* Aashish Chaudhary [mailto:aashish.chaudhary at kitware.com]
*Sent:* Friday, September 25, 2015 2:00 PM
*To:* Ken Martin
*Cc:* Moreland, Kenneth; Dave DeMarle; Scott, W Alan; ParaView Developers
*Subject:* Re: [Paraview-developers] Anti-aliasing of triangles



Ken,



I am assuming you are referring to screen space anti aliasing and not the
super sampled one (SSAA is typically referred for the super sampled one)?
if its the prior then +1. What particular paper / implementation you are
thinking?



- Aashish



On Fri, Sep 25, 2015 at 8:04 AM, Ken Martin <ken.martin at kitware.com> wrote:

I do want to add in a SSAA pass to VTK.  From a code perspective it should
be fairly easy and then you should be able to have AA triangles safely etc.



Ken



Ken Martin PhD

Chairman & CFO

Kitware Inc.

28 Corporate Drive

Clifton Park NY 12065

ken.martin at kitware.com

919 869-8871 (w)





This communication, including all attachments, contains confidential and
legally privileged information, and it is intended only for the use of the
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received this communication in error please notify us immediately and
destroy the original message.  Thank you.



*From:* Paraview-developers [mailto:paraview-developers-bounces at paraview.org]
*On Behalf Of *Moreland, Kenneth
*Sent:* Thursday, September 24, 2015 3:08 PM
*To:* David E DeMarle; Scott, W Alan
*Cc:* paraview-developers at paraview.org
*Subject:* Re: [Paraview-developers] Anti-aliasing of triangles



FYI, it also messes up lots of other rendering modes (like depth peeling
and picking). We had enough trouble with it that we shut it off all the
time.



-Ken



*From: *Paraview-developers <paraview-developers-bounces at paraview.org> on
behalf of David E DeMarle <dave.demarle at kitware.com>
*Date: *Thursday, September 24, 2015 at 1:05 PM
*To: *Walter Scott <wascott at sandia.gov>
*Cc: *"paraview-developers at paraview.org" <paraview-developers at paraview.org>
*Subject: *[EXTERNAL] Re: [Paraview-developers] Anti-aliasing of triangles



Because it messes of parallel compositing.



A workaround is to render large images (4x wider and 4x taller) and then
resample them down in some image editor.






David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909



On Thu, Sep 24, 2015 at 3:02 PM, Scott, W Alan <wascott at sandia.gov> wrote:

I have a customer asking why we don’t antialias our triangles?  You can see
this with the (very slightly) raged edge on the sources/sphere.



Thanks,



Alan



--------------------------------------------------------

W. Alan Scott

ParaView Support Manager



SAIC

Sandia National Laboratories, MS 0822

Org 9326 - Building 880 A1-C

(505) 284-0932   FAX (505) 284-5619

---------------------------------------------------------




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*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *

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