Hello everyone! Is it possible to create new local coordinate system (x1,y1,z1) and compute velocities in that (in short coordinate transformation) from the original system (x,y,z)? Google search did not help me much. And 'Transform' filter do not transform velocities to the new coordinate system (is a geometrical transformation).
Problem in detail : I read a 3D velocity field in Paraview and compute orthogonal eigenvectors (x1,y1,z1) at a certain point 'O1' using 'Programmable Filter'. These eigenvectors (x1,y1,z1) act as basis for the new coordinate system with origin 'O1'. I am trying and just want to visualize velocity in plane z1=0. For this, I need to transform velocity field from original system to new coordinate system (x1,y1,z1). And I am trying solve it in the following way. Maybe there is simple way to do it Paraview. >From eigenvectors, I can specify the plane (z1=0) by using a 'Slice' filter. The velocities in that plane correspond to the global velocity (u,v,w) in (x,y,z) coordinate system. Then, I use transformation matrix to compute new velocity vector (u1,v1,w1) using 'Calculator' or 'Python Calculation'. However, those velocities correspond to (x1,y1,z1) coordinate system. So, is there a way to associate these newly computed velocities to a new coordinate system and plot them? Or is there a different way to do it Paraview? I would be very thankful for your suggestions and inputs. Thanks in advance, yours -- Manu V Goudar Lab of Aero & Hydrodynamics, Delft University of Technology Delft, The Netherlands
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