Drawing smooth circles in labview

[pranjall]

Hi 

I am using the 'Draw Circle by Radius' VI to draw a pie chart inside a picture box. Its all fine, except that the circle edges are not exactly smooth (see the attached pic). 

I tried looking for it on the net, but couldn't find anything of much use. 

Any ideas on how to make the edges nice and smooth? 

[MikeeB]

Hi
The circle is not smooth as no anti-aliasing is done with the picture drawing VIs. To get it to appear smooth you would need to implement an anti-aliasing algorithm in the picture control. This is not something I have ever seen done. You could download MSChart from Microsoft, it is just a free .NET component and code that you can download. Thoric has done a great example here https://decibel.ni.com/content/docs/DOC-9946 that you could start with to draw the pie chart for you.

Mike

[MikeeB · Accepted solution]

Hi
The circle is not smooth as no anti-aliasing is done with the picture drawing VIs. To get it to appear smooth you would need to implement an anti-aliasing algorithm in the picture control. This is not something I have ever seen done. You could download MSChart from Microsoft, it is just a free .NET component and code that you can download. Thoric has done a great example here https://decibel.ni.com/content/docs/DOC-9946 that you could start with to draw the pie chart for you.

Mike

[pranjall]

Ohhk....this is strange, sad and unfortunate that a platform like LabVIEW doesn't have something as obvious as this.