RectilinearGrid
VTKExamples/Python/RectilinearGrid/RectilinearGrid
Description¶
Shows how to create a vtkRectilinearGrid.
Code¶
RectilinearGrid.py
import vtk def main(): colors = vtk.vtkNamedColors() x = [ -1.22396, -1.17188, -1.11979, -1.06771, -1.01562, -0.963542, -0.911458, -0.859375, -0.807292, -0.755208, -0.703125, -0.651042, -0.598958, -0.546875, -0.494792, -0.442708, -0.390625, -0.338542, -0.286458, -0.234375, -0.182292, -0.130209, -0.078125, -0.026042, 0.0260415, 0.078125, 0.130208, 0.182291, 0.234375, 0.286458, 0.338542, 0.390625, 0.442708, 0.494792, 0.546875, 0.598958, 0.651042, 0.703125, 0.755208, 0.807292, 0.859375, 0.911458, 0.963542, 1.01562, 1.06771, 1.11979, 1.17188] y = [ -1.25, -1.17188, -1.09375, -1.01562, -0.9375, -0.859375, -0.78125, -0.703125, -0.625, -0.546875, -0.46875, -0.390625, -0.3125, -0.234375, -0.15625, -0.078125, 0, 0.078125, 0.15625, 0.234375, 0.3125, 0.390625, 0.46875, 0.546875, 0.625, 0.703125, 0.78125, 0.859375, 0.9375, 1.01562, 1.09375, 1.17188, 1.25] z = [ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.75, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.75, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.75, 3.8, 3.9] # Create a rectilinear grid by defining three arrays specifying the # coordinates in the x-y-z directions. xCoords = vtk.vtkFloatArray() for i in x: xCoords.InsertNextValue(i) yCoords = vtk.vtkFloatArray() for i in y: yCoords.InsertNextValue(i) zCoords = vtk.vtkFloatArray() for i in z: zCoords.InsertNextValue(i) # The coordinates are assigned to the rectilinear grid. Make sure that # the number of values in each of the XCoordinates, YCoordinates, # and ZCoordinates is equal to what is defined in SetDimensions(). # rgrid = vtk.vtkRectilinearGrid() rgrid.SetDimensions(len(x), len(y), len(z)) rgrid.SetXCoordinates(xCoords) rgrid.SetYCoordinates(yCoords) rgrid.SetZCoordinates(zCoords) # Extract a plane from the grid to see what we've got. plane = vtk.vtkRectilinearGridGeometryFilter() plane.SetInputData(rgrid) plane.SetExtent(0, 46, 16, 16, 0, 43) rgridMapper = vtk.vtkPolyDataMapper() rgridMapper.SetInputConnection(plane.GetOutputPort()) wireActor = vtk.vtkActor() wireActor.SetMapper(rgridMapper) wireActor.GetProperty().SetRepresentationToWireframe() wireActor.GetProperty().SetColor(colors.GetColor3d("Black")) wireActor.GetProperty().EdgeVisibilityOn() # Create the usual rendering stuff. renderer = vtk.vtkRenderer() renWin = vtk.vtkRenderWindow() renWin.AddRenderer(renderer) iren = vtk.vtkRenderWindowInteractor() iren.SetRenderWindow(renWin) renderer.AddActor(wireActor) renderer.SetBackground(colors.GetColor3d("AliceBlue")) renderer.ResetCamera() renderer.GetActiveCamera().Elevation(60.0) renderer.GetActiveCamera().Azimuth(30.0) renderer.GetActiveCamera().Zoom(1.0) renWin.SetSize(300, 300) # interact with data renWin.Render() iren.Start() if __name__ == '__main__': main()