<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div>Hi Mikhail,</div><div><br></div><div><br></div><div>Yes, that’s because of the triangulation (or tesselation) of surface representations.</div><div>Most of the 3D programs including ParaView draw objects as groups of triangles.</div><div>That’s depends on today’s 3D rendering pipelines such as OpenGL, DirectX, etc.</div><div>Please googling the keywords: ‘vertex shading’</div><div><br></div><div>Even though you read your data as structured grid with point values,</div><div>ParaView should immediately triangulate all of the rectangles, and interpolating</div><div>the values between points of the triangles.</div><div><br></div><div># If you visualize cell values, there are no problem caused by interpolating.</div><div><br></div><div>The attached image is one of the solution.</div><div>1. read your data</div><div>2. make a ‘fine resolution' Plane source with same size to the original (for example, 200x100 structured grid)</div><div>3. apply Resample With Dataset filter</div><div>The result looks nearly-symmetric for me.</div><div><br></div><div><br></div><div>Magician</div><div><br></div><br><div><div>On May 17, 2014, at 10:40, <a href="mailto:paraview-request@paraview.org">paraview-request@paraview.org</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Date: Fri, 16 May 2014 20:40:18 -0500<br>From: Mikhail Artemyev <<a href="mailto:artemiev.mikhail@gmail.com">artemiev.mikhail@gmail.com</a>><br>To: <a href="mailto:paraview@paraview.org">paraview@paraview.org</a><br>Subject: [Paraview] non-symmetric representation of symmetric field<br>Message-ID: <<a href="mailto:5376BE02.7050800@gmail.com">5376BE02.7050800@gmail.com</a>><br>Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br><br>Dear all,<br><br>Here is a minimal example of values distributed over a mesh:<br><br>0------0------0------0------0<br>| | | | |<br>0----0.5---0.75---0.5-----0<br>| | | | |<br>0------0------1------0------0<br><br>To visualize this field I wrote a .vts file:<br><br><?xml version="1.0"?><br><VTKFile type="StructuredGrid" version="0.1" byte_order="LittleEndian"><br> <StructuredGrid WholeExtent="1 5 1 3 1 1"><br> <Piece Extent="1 5 1 3 1 1"><br> <PointData Scalars="scalars"><br> <DataArray type="Float64" Name="sol_" format="ascii"><br>0 0 1 0 0 0 0.5 0.75 0.5 0 0 0 0 0 0<br> </DataArray><br> </PointData><br> <Points><br> <DataArray type="Float64" NumberOfComponents="3" format="ascii"><br>0 0 0<br>1 0 0<br>2 0 0<br>3 0 0<br>4 0 0<br>0 1 0<br>1 1 0<br>2 1 0<br>3 1 0<br>4 1 0<br>0 2 0<br>1 2 0<br>2 2 0<br>3 2 0<br>4 2 0<br> </DataArray><br> </Points><br> </Piece><br> </StructuredGrid><br></VTKFile><br><br>The visual representation of this field, however, doesn't look symmetric <br>(a figure is attached),<br>although the values are symmetric with respect to a Y-axis crossing the <br>center of the domain.<br><br>Could you please shed some light on where I am wrong -<br>in my understanding of visualization technique, or in a way I pass the <br>data to ParaView?<br>I use ParaView 4.1.0 64-bit, Linux.<br><br>Thank you.<br>Best regards,<br>Mikhail<br></blockquote></div><img apple-inline="yes" id="E7195C7F-1C76-410C-9CB6-5987FD78734A" height="701" width="1153" apple-width="yes" apple-height="yes" src="cid:AA201761-184C-4676-872B-738D9987B4C2"></body></html>