Dear all, I am an almost-new user of MayaVi. Essentially, what I want to do is plotting streamlines for a given vector field and put the values along the field lines (positions, magnetic magnitude, density...) in a file.
I am able to do this with arrays defined by myself through the "flow" command. This is the problem I am facing now. I have a VTK file containing an unstructured grid (I have not created this file, it has been given to me). I searched on this forum and on other webpages, but I did not manage to find the solution. This is what I am able to do: from enthought.tvtk.api import tvtk r = tvtk.UnstructuredGridReader() r.file_name = 'file001.vtk' r.update() ug = r.output In ug.points there are all the tuples related to the positions. Besides, doing print ug this is the output vtkUnstructuredGrid (0x22b686e0) Debug: Off Modified Time: 260 Reference Count: 2 Registered Events: Registered Observers: vtkObserver (0x22b6cd80) Event: 33 EventName: ModifiedEvent Command: 0x22b6fb30 Priority: 0 Tag: 1 Source: (none) Information: 0x22b68810 Data Released: False Global Release Data: Off UpdateTime: 262 Release Data: Off UpdateExtent: Not Initialized UpdateExtent: 0, -1, 0, -1, 0, -1 Update Number Of Pieces: 1 Update Piece: 0 Update Ghost Level: 0 WholeExtent: 0, -1, 0, -1, 0, -1 MaximumNumberOfPieces: 1 RequestExactExtent: Off Field Data: Debug: Off Modified Time: 220 Reference Count: 1 Registered Events: (none) Number Of Arrays: 1 Array 0 name = TIME Number Of Components: 1 Number Of Tuples: 1 Number Of Points: 4541728 Number Of Cells: 567716 Cell Data: Debug: Off Modified Time: 260 Reference Count: 1 Registered Events: (none) Number Of Arrays: 4 Array 0 name = density Array 1 name = velocity Array 2 name = magnetic Array 3 name = pressure Number Of Components: 8 Number Of Tuples: 567716 Copy Tuple Flags: ( 1 1 1 1 1 0 1 ) Interpolate Flags: ( 1 1 1 1 1 0 0 ) Pass Through Flags: ( 1 1 1 1 1 1 1 ) Scalars: Debug: Off Modified Time: 238 Reference Count: 1 Registered Events: (none) Name: density Data type: double Size: 567716 MaxId: 567715 NumberOfComponents: 1 Information: 0 Name: density Number Of Components: 1 Number Of Tuples: 567716 Size: 567716 MaxId: 567715 LookupTable: (none) Array: 0x27050000 Vectors: Debug: Off Modified Time: 244 Reference Count: 1 Registered Events: (none) Name: velocity Data type: double Size: 1703148 MaxId: 1703147 NumberOfComponents: 3 Information: 0 Name: velocity Number Of Components: 3 Number Of Tuples: 567716 Size: 1703148 MaxId: 1703147 LookupTable: (none) Array: 0x292f6000 Normals: (none) TCoords: (none) Tensors: (none) GlobalIds: (none) PedigreeIds: (none) Point Data: Debug: Off Modified Time: 212 Reference Count: 2 Registered Events: Registered Observers: vtkObserver (0x22d195a0) Event: 33 EventName: ModifiedEvent Command: 0x22d17e20 Priority: 0 Tag: 1 Number Of Arrays: 0 Number Of Components: 0 Number Of Tuples: 0 Copy Tuple Flags: ( 1 1 1 1 1 0 1 ) Interpolate Flags: ( 1 1 1 1 1 0 0 ) Pass Through Flags: ( 1 1 1 1 1 1 1 ) Scalars: (none) Vectors: (none) Normals: (none) TCoords: (none) Tensors: (none) GlobalIds: (none) PedigreeIds: (none) Bounds: Xmin,Xmax: (-0.00483349, 0.00483349) Ymin,Ymax: (-0.00483349, 0.00483349) Zmin,Zmax: (-0.00483349, 0.00483349) Compute Time: 282 Number Of Points: 4541728 Point Coordinates: 0x22b5b890 Locator: 0 Number Of Pieces: 1 Piece: 0 Ghost Level: 0 I would need to retrieve the "density" scalar array (in order to plot e.g. isosurfaces) and the "magnetic" vector array (in order to plot streamlines). I am stucked here, may anyone give me some suggestions? Cheers, n. P.S. Opening this VTK file in VisIt, I am able to plot the streamlines, but I would definitely like to work with MayaVi since after plotting streamlines, I (should) know how to export the values of density and magnetic magnitude along each field line to a file. ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnnow-d2d _______________________________________________ MayaVi-users mailing list MayaVi-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mayavi-users
