Jump to content

LabVIEW Graph Anti-Aliasing


mje

Recommended Posts

I'm looking to do some line drawing in the picture controls which frankly have to be anti-aliased. Really basic stuff that can be entirely software based. Does anyone know if the routines LabVIEW uses to draw lines in the graph/chart controls are exposed and can be re-used in any way?

 

I'm not against implementing something like the Wu algorithm myself, but clearly LabVIEW has already implemented something...

Link to comment
I'm looking to do some line drawing in the picture controls which frankly have to be anti-aliased. Really basic stuff that can be entirely software based. Does anyone know if the routines LabVIEW uses to draw lines in the graph/chart controls are exposed and can be re-used in any way?

 

I'm not against implementing something like the Wu algorithm myself, but clearly LabVIEW has already implemented something...

 

The scene object has anti-aliasing which is used in the 3D Graph Controls. Create a scene object and select "Specials>Anti-aliasing"

Link to comment

Been down this road and after fighting with the 3D graph and 2D picture control I became dismayed at LV's lack of modern 2D graphics with basic features such as anti-aliasing and the ability to define a hierarchy of graphic objects.  I was hoping someone would have tried to bring some SVG action in LV but instead had to settle for .net which is actually pretty nice.  I spent about 2 solid weeks wrapping .net graphics and produced some very nice anti-aliased radar type graphics. If interested I will try to wrap up my .net libraries and post in the CR. In the meantime you can see some of the results in my portfolio at www.viScience.com (Avionics 1553 Simulator)

  • Thanks 1
Link to comment

Good suggestions both of you. I have a whole set of internal libraries I'm using for 2D picture elements in this application, so I'd rather not make the switch to .NET or 3D just yet. That said this may be the last time I use the native 2D picture routines for any serious work.

 

I threw this together this morning as a proof:

post-11742-0-77027500-1393859532.png

 

The performance is as expected, hideously slow when it comes time to flatten the result (do not try to render the raw op-code string). As a result it's a literal interpretation of the Wu algorithm as described at wikipedia since all the optimization in the world won't change how slow it is to render op-code based dots in LabVIEW.

 

This is just a proof of concept, at this stage I'm happy enough to say it can be done and defer the implementation until later. Still needs color, line width, and ditching of the op-codes in favor of a raster buffer which should improve things by at least an order of magnitude.

 

Example code is LV2013, public domain.

Wu.zip

Link to comment
Good suggestions both of you. I have a whole set of internal libraries I'm using for 2D picture elements in this application, so I'd rather not make the switch to .NET or 3D just yet. That said this may be the last time I use the native 2D picture routines for any serious work.

 

I threw this together this morning as a proof:

attachicon.gifWu.png

 

The performance is as expected, hideously slow when it comes time to flatten the result (do not try to render the raw op-code string). As a result it's a literal interpretation of the Wu algorithm as described at wikipedia since all the optimization in the world won't change how slow it is to render op-code based dots in LabVIEW.

 

This is just a proof of concept, at this stage I'm happy enough to say it can be done and defer the implementation until later. Still needs color, line width, and ditching of the op-codes in favor of a raster buffer which should improve things by at least an order of magnitude.

 

Example code is LV2013, public domain.

Maybe create it as a plugin filter for Bitman. I always found Vugies Bitman is far superior in rendering performance for anything I do in 2D.

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.