Thanks Ken. The subdivision filter you suggest does help by making the edges a bit blurred. Looking at the exact values though I have realized that it is a more fundamental issue. I am looking into other options like post-processing the contour with some kind of interpolation.
Ruggiero On 29 September 2014 20:33, Moreland, Kenneth <[email protected]> wrote: > I couldn't see the files you posted to dropbox because they were > deleted before I got a chance to see them. I also cannot even guess what > Star-CCM is doing since I haven't seen that either. > > One thing you can try is to apply the loop subdivision filter. That > filter subdivides triangles in a polygonal mesh and applies some nonlinear > smoothing to the data. To use this filter, first apply the "Extract > Surface" filter to your data (to convert it to polygons), and then apply > "Loop Subdivision." > > -Ken > > From: Ruggiero Guida <[email protected]> > Date: Saturday, September 27, 2014 at 5:41 AM > To: Kenneth Moreland <[email protected]> > Cc: "[email protected]" <[email protected]> > Subject: [EXTERNAL] Re: [Paraview] Fwd: VTK interpolation help > > Thanks Ken. > > Got it. It makes sense. It seems that the only way to improve the > quality is to have a finer grid and a more detailed calculation of the > amount of radiation (the previous image included only the direct). New > images are at this link > > https://www.dropbox.com/s/z9m2nr7ybj5mqqp/finermesh.zip?dl=0 > > I was wondering whether there was a way to at least smooth the results > (see other attached image). I have looked at the filters available, but > there is no such thing. When I import these results onto StarCCM I > definitely see a smoother interpolation. > > Thanks > Ruggiero > > On 26 September 2014 19:01, Moreland, Kenneth <[email protected]> wrote: > >> Yes, ParaView will use the triangles to interpolate values between >> points. The interpolation you are getting is exactly as I would expect >> based on your data and topology. I'm not sure what you mean by "not >> [interpolating] in the x,y directions". The triangles are in the x-y plane >> and interpolation is happening in this x-y plane. >> >> Moving into guesswork, I am imagining that you are expecting a smooth >> and fairly straight contour at some distance from the buildings. The >> reason you don't see this is due to the representation in your data. I >> notice that your data contains only two values for "RadiationOnPerson." The >> value is either 0 or 205.7. Presumably there is some contour in space where >> this field discontinuously transitions from 0 to 205.7, but there is no way >> to accurately predict where that is from the data you are providing. >> Instead, ParaView is just linearly interpolating between these values, >> which is wrong but probably the best you can do with the data provided. The >> problem is made even worse by the irregular sampling of the field. >> >> -Ken >> >> From: Ruggiero Guida <[email protected]> >> Date: Thursday, September 25, 2014 at 10:44 PM >> To: "[email protected]" <[email protected]> >> Subject: [EXTERNAL] [Paraview] Fwd: VTK interpolation help >> >> Dear group, >> >> I hope I will be able to find an answer to my problem here. >> >> I am not sure I understand how the interpolation works. I have >> generated a VTK file (attached) and I am trying to visualizing it in >> Paraview. The data represent the solar radiation on the ground around >> various buildings. >> >> My algorithm calculates the radiation in each node of a constrained >> delauney triangulation. The plan is to visualize this in paraview to have a >> nice smooth fillled contour. >> >> The image I get though, does not make sense to me; it seems that >> paraview is interpolating only within the triangles and not in the x,y >> directions. Am I missing something? >> >> Thanks a lot for any help >> Ruggiero >> >> >
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