[vtkusers] Interpolation of data..

[Rakesh Patil]

 Hi,My both the meshes are unstructured grid. My application is based on FEA method.. ScatterG does contains scalars and the depth values are stored as a scalar array for scatterG..I dont want coordinate values to be interpolated.. As an example,scatterG contains data something like this,Points: 87.23 16.2690086.24 17.8753087.18 17.27700......and the scalar for scatterG is defined as 900530700......meshG contains points84.1217.83 081.3315.28 083.2418.28 0......So,, what i want to do is, using the third column of scatterG, i need to estimate the third column of meshG..Any ideas how it can be done.??ThanksRakesh Patil Original message From:"Dean Inglis"< dean.inglis at camris.ca >Date: 23 Apr 10 20:16:47Subject:Re: Re:[vtkusers]Interpolation of data..To: "Rakesh Patil" vtkProbeFlter will probe the scalar values ateach spatial location of your scattered points: youneed to have scalar, vector, or tensor data associatedwith the grid's points:scatterG>GetPointData()>SetScalars( somevt
 kDataArray );the vtkProbeFilter will not interpolate any coordinatevalues like x , y,z locations.If you have depth valuesin a vtkDataArray that correspond to the x, y, z locationsin your scatterG grid, then this should work.Does anyone know ifmaybe the input to the probe filter needs to be a structured data set likevtkPolyData? By the sound of your grid's name "mesh" , this sounds like structureddata.Can it be converted to a vtkPolyData?Also, you allocate a smart pointer as:vtkSmartPointer probe = vtkSmartPointer::New()Dean Original Message  From: "Rakesh Patil" To: Cc: Sent: Friday, April 23, 2010 9:40 AMSubject: Re: Re:[vtkusers] Interpolation of data..> Hi..I can independently view those grids... This is what I have done..vtkUnstructuredGrid *scatterG = MyApp::getInstance()>getScatterGrid();vtkUnstructuredGrid *meshG = MyApp::getInstance()>getMeshGrid();vtkSmartPointer probe = vtkSmartPointer::New();probe>SetSource(scatterG);probe>SetInput(meshG);probe>Update();vtkDataArr
 ay *data = probe>GetOutput()>GetPointData()>GetScalar();vtkDoubleArray *doubleArray = vtkDoubleArray::SafeDownCast(data);MyContour::getInstance()>setDisplayArray(doubleArray);After doing this, i click on contour display button, and the contour for bathymetry gets displayed for meshG.Initially, meshG doesnt have depth/elevation (z) value. z value is always 0 for every node point. x and y corresponds to the lon and lat respectively.But the scatter data contains lon, lat, and depth.. So, once the interpolation is done, i should get the bathymetry (depth/elevation) for meshG also..'MyContour' in the above code is the class which displays the contours for wh> atever data is being passed.So, any suggestions or > comments..??ThanksRegards Rakesh Patil Original messageFrom:Dean Inglis< > dean.inglis at camris.ca > Date: 23 Apr 10 16:49:50 Subject:Re: > Re:[vtkusers]Interpolation of data.. To: "Rakesh Patil">
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