def _extractRectGridByBounds(vtrObj,boundObj):
'''
Function that extracts cell from a rectilinear grid (vtr) using bounds.
Should be signifacantly faster the extractBounds method.
'''
import numpy as np, SimPEG as simpeg, vtk
import vtk.util.numpy_support as npsup
bO = boundObj.GetBounds()
xC = npsup.vtk_to_numpy(vtrObj.GetXCoordinates())
yC = npsup.vtk_to_numpy(vtrObj.GetYCoordinates())
zC = npsup.vtk_to_numpy(vtrObj.GetZCoordinates())
iLT = np.where(xC <= bO[0])[0]
iL = 0 if iLT.shape[0] == 0 else iLT[-1]
iUT = np.where(xC >= bO[1])[0]
iU = len(xC) if iUT.shape[0] == 0 else iUT[0]
jLT = np.where(yC <= bO[2])[0]
jL = 0 if jLT.shape[0] == 0 else jLT[-1]
jUT = np.where(yC >= bO[3])[0]
jU = len(yC) if jUT.shape[0] == 0 else jUT[0]
kLT = np.where(zC <= bO[4])[0]
kL = 0 if kLT.shape[0] == 0 else kLT[-1]
kUT = np.where(zC >= bO[5])[0]
kU = len(zC) if kUT.shape[0] == 0 else kUT[0]
extRect = vtk.vtkExtractRectilinearGrid()
extRect.SetInputData(vtrObj)
extRect.SetVOI((iL,iU,jL,jU,kL,kU))
extRect.Update()
return extRect
def _extractRectGridByBounds(vtrObj,boundObj):
'''
Function that extracts cell from a rectilinear grid (vtr) using bounds.
Should be signifacantly faster the extractBounds method.
'''
bO = boundObj.GetBounds()
xC = npsup.vtk_to_numpy(vtrObj.GetXCoordinates())
yC = npsup.vtk_to_numpy(vtrObj.GetYCoordinates())
zC = npsup.vtk_to_numpy(vtrObj.GetZCoordinates())
iLT = np.where(xC <= bO[0])[0]
iL = 0 if iLT.shape[0] == 0 else iLT[-1]
iUT = np.where(xC >= bO[1])[0]
iU = len(xC) if iUT.shape[0] == 0 else iUT[0]
jLT = np.where(yC <= bO[2])[0]
jL = 0 if jLT.shape[0] == 0 else jLT[-1]
jUT = np.where(yC >= bO[3])[0]
jU = len(yC) if jUT.shape[0] == 0 else jUT[0]
kLT = np.where(zC <= bO[4])[0]
kL = 0 if kLT.shape[0] == 0 else kLT[-1]
kUT = np.where(zC >= bO[5])[0]
kU = len(zC) if kUT.shape[0] == 0 else kUT[0]
extRect = vtk.vtkExtractRectilinearGrid()
extRect.SetInputData(vtrObj)
extRect.SetVOI((iL,iU,jL,jU,kL,kU))
extRect.Update()
return extRect
def __init__(self, module_manager):
SimpleVTKClassModuleBase.__init__(
self, module_manager,
vtk.vtkExtractRectilinearGrid(), 'Processing.',
('vtkRectilinearGrid',), ('vtkRectilinearGrid',),
replaceDoc=True,
inputFunctions=None, outputFunctions=None)
def __init__(self, module_manager):
SimpleVTKClassModuleBase.__init__(self,
module_manager,
vtk.vtkExtractRectilinearGrid(),
'Processing.',
('vtkRectilinearGrid', ),
('vtkRectilinearGrid', ),
replaceDoc=True,
inputFunctions=None,
outputFunctions=None)
def makeRectiVTKVOIThres(vtkObj,VOI,limits): """Make volume of interest and threshold for rectilinear grid.""" # Check for the input cellCore = vtk.vtkExtractRectilinearGrid() cellCore.SetVOI(VOI) cellCore.SetInput(vtkObj) cellThres = vtk.vtkThreshold() cellThres.AllScalarsOn() cellThres.SetInputConnection(cellCore.GetOutputPort()) cellThres.ThresholdBetween(limits[0],limits[1]) cellThres.Update() return cellThres.GetOutput(), cellCore.GetOutput()
def _set_input (self):
""" This function tries its best to use an appropriate filter
for the given input data."""
debug ("In ExtractGrid::_set_input ()")
out = self.prev_fil.GetOutput ()
dim = out.GetDimensions ()
self.dim = [dim[0] -1, dim[1] -1, dim[2] -1]
if out.IsA ('vtkStructuredGrid'):
f = vtk.vtkExtractGrid()
elif out.IsA ('vtkRectilinearGrid'):
f = vtk.vtkExtractRectilinearGrid()
elif out.IsA ('vtkStructuredPoints') or out.IsA('vtkImageData'):
f = vtk.vtkExtractVOI()
else:
msg = "This module does not support the given "\
"output - %s "%(out.GetClassName ())
raise Base.Objects.ModuleException, msg
if f.GetClassName() != self.fil.GetClassName():
self.fil = f
self.fil.SetInput (out)
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
# create pipeline - rectilinear grid
#
rgridReader = vtk.vtkRectilinearGridReader()
rgridReader.SetFileName("" + str(VTK_DATA_ROOT) + "/Data/RectGrid2.vtk")
outline = vtk.vtkOutlineFilter()
outline.SetInputConnection(rgridReader.GetOutputPort())
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(outline.GetOutputPort())
actor = vtk.vtkActor()
actor.SetMapper(mapper)
rgridReader.Update()
extract1 = vtk.vtkExtractRectilinearGrid()
extract1.SetInputConnection(rgridReader.GetOutputPort())
# extract1 SetVOI 0 46 0 32 0 10
extract1.SetVOI(23, 40, 16, 30, 9, 9)
extract1.SetSampleRate(2, 2, 1)
extract1.IncludeBoundaryOn()
extract1.Update()
surf1 = vtk.vtkDataSetSurfaceFilter()
surf1.SetInputConnection(extract1.GetOutputPort())
tris = vtk.vtkTriangleFilter()
tris.SetInputConnection(surf1.GetOutputPort())
mapper1 = vtk.vtkPolyDataMapper()
mapper1.SetInputConnection(tris.GetOutputPort())
mapper1.SetScalarRange(extract1.GetOutput().GetScalarRange())
actor1 = vtk.vtkActor()
actor1.SetMapper(mapper1)
from vtk.util.misc import vtkGetTempDir VTK_DATA_ROOT = vtkGetDataRoot() VTK_TEMP_DIR = vtkGetTempDir() file0 = VTK_TEMP_DIR + '/rgFile0.vtr' file1 = VTK_TEMP_DIR + '/rgFile1.vtr' file2 = VTK_TEMP_DIR + '/rgFile2.vtr' # read in some grid data gridReader = vtk.vtkRectilinearGridReader() gridReader.SetFileName(VTK_DATA_ROOT + "/Data/RectGrid2.vtk") gridReader.Update() # extract to reduce extents of grid extract = vtk.vtkExtractRectilinearGrid() extract.SetInputConnection(gridReader.GetOutputPort()) extract.SetVOI(0, 23, 0, 32, 0, 10) extract.Update() # write just a piece (extracted piece) as well as the whole thing rgWriter = vtk.vtkXMLRectilinearGridWriter() rgWriter.SetFileName(file0) rgWriter.SetInputConnection(extract.GetOutputPort()) rgWriter.SetDataModeToAscii() rgWriter.Write() rgWriter.SetFileName(file1) rgWriter.SetInputConnection(gridReader.GetOutputPort()) rgWriter.SetDataModeToAppended() rgWriter.SetNumberOfPieces(2)