<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi,<br><br>Let me correct myself; the block contained inside is a vtkStructuredGrid. I did a printout what is in the pipeline (self.GetInput()):<br>
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<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;">vtkMultiBlockDataSet (0x3a7c1d0)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Debug: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Modified Time: 164250</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Reference Count: 2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Registered Events: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Source: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Information: 0x3a7c230</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Data Released: False</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Global Release Data: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> UpdateTime: 164282</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Release Data: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> UpdateExtent: Initialized</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Update Number Of Pieces: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Update Piece: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Update Ghost Level: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> MaximumNumberOfPieces: -1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> ExtentTranslator: (0x3a7df30)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> RequestExactExtent: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Field Data:</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Debug: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Modified Time: 155460</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Reference Count: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Registered Events: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Arrays: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Components: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Tuples: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Children: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Child 0: vtkUnstructuredGrid</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Debug: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Modified Time: 164208</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Reference Count: 3</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Registered Events: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Source: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Information: 0x4920790</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Data Released: False</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Global Release Data: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> UpdateTime: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Release Data: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> UpdateExtent: Not Initialized</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> MaximumNumberOfPieces: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> RequestExactExtent: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Field Data:</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Debug: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Modified Time: 164167</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Reference Count: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Registered Events: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Arrays: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Components: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Tuples: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Points: 34943</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Cells: 31488</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Cell Data:</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Debug: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Modified Time: 164206</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Reference Count: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Registered Events: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Arrays: 24</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 0 name = PRESSURE</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 1 name = X_VELOCITY</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 2 name = X_VELOCITY_M1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 3 name = X_VELOCITY_M2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 4 name = Y_VELOCITY</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 5 name = Y_VELOCITY_M1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 6 name = Y_VELOCITY_M2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 7 name = Z_VELOCITY</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 8 name = Z_VELOCITY_M1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 9 name = Z_VELOCITY_M2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 10 name = TEMPERATURE</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 11 name = ENTHALPY</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 12 name = ENERGY_M1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 13 name = ENERGY_M2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 14 name = NUT</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 15 name = NUT_M1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 16 name = NUT_M2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 17 name = DENSITY</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 18 name = DENSITY_M1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 19 name = DENSITY_M2</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 20 name = MU_LAM</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 21 name = MU_TURB</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 22 name = WALL_DIST</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Array 23 name = BODY_FORCES</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Components: 26</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Tuples: 31488</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Copy Tuple Flags: ( 1 1 1 1 1 0 1 )</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Interpolate Flags: ( 1 1 1 1 1 0 0 )</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Pass Through Flags: ( 1 1 1 1 1 1 1 )</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Scalars: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Vectors: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Normals: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> TCoords: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Tensors: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> GlobalIds: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> PedigreeIds: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Point Data:</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Debug: Off</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Modified Time: 164208</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Reference Count: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Registered Events: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Arrays: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Components: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Tuples: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Copy Tuple Flags: ( 1 1 1 1 1 0 1 )</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Interpolate Flags: ( 1 1 1 1 1 0 0 )</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Pass Through Flags: ( 1 1 1 1 1 1 1 )</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Scalars: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Vectors: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Normals: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> TCoords: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Tensors: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> GlobalIds: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> PedigreeIds: (none)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Bounds: </span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Xmin,Xmax: (-0.1, 0.3)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Ymin,Ymax: (-0.100002, 2.60209e-18)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Zmin,Zmax: (-0.100002, 2.60209e-18)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Compute Time: 379083</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Points: 34943</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Point Coordinates: 0x4aa82b0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Locator: 0</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Number Of Pieces: 1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Piece: -1</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: 'Courier'; font-size: 9pt;"> Ghost Level: 0</span></p></td></tr></tbody></table>Maybe it's because the point data fields, like the scalars and vectors you mentioned, are empty? I could probably fill in the gaps.<br><br>Sohail<br><br>--- On <b>Tue, 3/1/11, Berk Geveci <i><berk.geveci@kitware.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Berk Geveci <berk.geveci@kitware.com><br>Subject: Re: [Paraview] Using streamtracer/gradient filters on "multi-block" data set<br>To: "Sohail Shafii" <sohailshafii@yahoo.com><br>Cc: paraview@paraview.org<br>Date: Tuesday, March 1, 2011, 5:07 PM<br><br><div id="yiv1284371310">By any chance, does this multi-block dataset contain a block that does not have arrays (scalars and/or vectors)? That's probably why those filters are disabled. You can always use
Extract Blocks to extract the block you are interested in and then apply the filter. As for the Programmable Filter, if you set the output type to vtkUnstructuredGrid, you should be able to do:<div>
<br></div><div>self.GetOutput().ShallowCopy(self.GetInput().GetBlock(0))</div><div><br></div><div>assuming that block 0 is a uns. grid.</div><div><br></div><div>-berk<br><br><div class="yiv1284371310gmail_quote">On Tue, Mar 1, 2011 at 5:29 PM, Sohail Shafii <span dir="ltr"><<a rel="nofollow" ymailto="mailto:sohailshafii@yahoo.com" target="_blank" href="/mc/compose?to=sohailshafii@yahoo.com">sohailshafii@yahoo.com</a>></span> wrote:<br>
<blockquote class="yiv1284371310gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font: inherit;" valign="top"><br>Hi,<br><br>I've read in a CAS file, which Paraview read in a Multi-block dataset, which contains within it a unstructured grid.<br>
<br>Initially I had a problem where all of the data items were one-tuple arrays. So I created a UVW (3-tuple velocity) array and added it to the pipeline this way using a Python programmable filter:<br><br>input = self.GetInput()<br>
output = self.GetOutput()<br><br>output.ShallowCopy(input)<br><br>****create array here***<br>output.GetBlock(0).GetCellData().AddArray(UVWArray)<br><br>Note that "GetBlock(0)" gives me access to the grid object. For some reason the gradients and streamtracer filters were greyed out and unavailable. So I decided to make the output variable a vtkUnstructuredGrid instead and transferred the UVW array to it this way:<br>
<br>
output.GetPointData().AddArray(UVWArray)<br><br>Nope...didn't work. Any thoughts how I can modify the pipeline so that the streamtracer and gradients of unstructured data sets array can become usable? I'm guessing there is something in those classes which tells Paraview that they require certain input types. I've seen references to stuff like FillInputPortInformation. <br>
<br>Thanks,<br>Sohail<br><br>
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