def createCellLocator(a_FileName, a_LocatorType=None, a_Legacy='vtp'):
if a_FileName.endswith('vtu'):
reader = vtk.vtkXMLUnstructuredGridReader()
elif a_FileName.endswith('vtp'):
reader = vtk.vtkXMLPolyDataReader()
elif a_FileName.endswith('.vtk'):
if a_Legacy == 'none':
print("Need To Specify Data Type For Legacy Files")
sys.exit()
elif a_Legacy == 'vtu':
reader = vtk.vtkUnstructuredGridReader()
elif a_Legacy == 'vtp':
reader = vtk.vtkPolyDataReader()
else:
print("Unsupported File Extension")
sys.exit()
reader.SetFileName(a_FileName)
reader.Update()
if a_LocatorType is None:
locator = vtk.vtkCellTreeLocator()
else:
if a_LocatorType == 'oct':
locator = vtk.vtkCellLocator()
elif a_LocatorType == 'tre':
locator = vtk.vtkCellTreeLocator()
elif a_LocatorType == 'bsp':
locator = vtk.vtkModifiedBSPTree()
locator.SetDataSet(reader.GetOutput())
locator.BuildLocator()
return locator
def __init__(self, filename):
'''
It loads the vtk file.
'''
# PolyData object of Pyvista
# All its point arrays are converted to cell arrays.
self.mesh = pv.read(filename).point_data_to_cell_data()
# A locator is built to get the cells inside certain bounds in
# other functions of the trajectory class.
self.locator = vtk.vtkCellTreeLocator()
self.locator.SetDataSet(self.mesh)
self.locator.BuildLocator()
def __init__(self, dset):
self.dset = dset.VTKObject
self.xyz = [-10000, -20000, -30000]
self.pids = vtk.reference([0] * 10)
self.nverts = -1
self.pc = [0] * 3
self.wts = [0] * 10
self.gc = vtk.vtkGenericCell()
self.sid = 2
if self.dset.IsA('vtkUnstructuredGrid'):
self.locator = vtk.vtkCellTreeLocator()
self.locator.SetDataSet(dset.VTKObject)
self.locator.BuildLocator()
self.is_vtu = True
else:
self.is_vtu = False
def findCellsWithin(self, xbounds=(), ybounds=(), zbounds=(), c=None):
"""
Find cells that are within specified bounds.
Setting a color will add a vtk array to colorize these cells.
"""
if len(xbounds) == 6:
bnds = xbounds
else:
bnds = list(self.bounds())
if len(xbounds) == 2:
bnds[0] = xbounds[0]
bnds[1] = xbounds[1]
if len(ybounds) == 2:
bnds[2] = ybounds[0]
bnds[3] = ybounds[1]
if len(zbounds) == 2:
bnds[4] = zbounds[0]
bnds[5] = zbounds[1]
cellIds = vtk.vtkIdList()
self.cell_locator = vtk.vtkCellTreeLocator()
self.cell_locator.SetDataSet(self.polydata())
self.cell_locator.BuildLocator()
self.cell_locator.FindCellsWithinBounds(bnds, cellIds)
if c is not None:
cellData = vtk.vtkUnsignedCharArray()
cellData.SetNumberOfComponents(3)
cellData.SetName('CellsWithinBoundsColor')
cellData.SetNumberOfTuples(self.polydata(False).GetNumberOfCells())
defcol = np.array(self.color()) * 255
for i in range(cellData.GetNumberOfTuples()):
cellData.InsertTuple(i, defcol)
self.polydata(False).GetCellData().SetScalars(cellData)
self._mapper.ScalarVisibilityOn()
flagcol = np.array(colors.getColor(c)) * 255
cids = []
for i in range(cellIds.GetNumberOfIds()):
cid = cellIds.GetId(i)
if c is not None:
cellData.InsertTuple(cid, flagcol)
cids.append(cid)
return np.array(cids)
output = pl3d.GetOutput().GetBlock(0) ps = vtk.vtkPlaneSource() ps.SetXResolution(4) ps.SetYResolution(4) ps.SetOrigin(2, -2, 26) ps.SetPoint1(2, 2, 26) ps.SetPoint2(2, -2, 32) psMapper = vtk.vtkPolyDataMapper() psMapper.SetInputConnection(ps.GetOutputPort()) psActor = vtk.vtkActor() psActor.SetMapper(psMapper) psActor.GetProperty().SetRepresentationToWireframe() # Use the vtkCellTreeLocator rk4 = vtk.vtkRungeKutta4() treeLoc = vtk.vtkCellTreeLocator() ivp = vtk.vtkCompositeInterpolatedVelocityField() ivp.SetFindCellStrategy(vtk.vtkCellLocatorStrategy()) ivp.GetFindCellStrategy().SetCellLocator(treeLoc) streamer = vtk.vtkStreamTracer() streamer.SetInputData(output) streamer.SetSourceData(ps.GetOutput()) streamer.SetMaximumPropagation(100) streamer.SetInitialIntegrationStep(.2) streamer.SetIntegrationDirectionToForward() streamer.SetComputeVorticity(1) streamer.SetIntegrator(rk4) streamer.SetInterpolatorPrototype(ivp) rf = vtk.vtkRibbonFilter() rf.SetInputConnection(streamer.GetOutputPort())
opTime = timer.GetElapsedTime()
print(" Find cell probing: {0}".format(opTime))
# Time the deletion of the locator. The standard locator is quite slow due
# to fragmented memory.
timer.StartTimer()
del locator
timer.StopTimer()
time2 = timer.GetElapsedTime()
print(" Delete Cell Locator: {0}".format(time2))
print(" Cell Locator (Total): {0}".format(time + opTime + time2))
print("\n")
#############################################################
# Time the creation and building of the cell tree locator
locator1 = vtk.vtkCellTreeLocator()
locator1.SetDataSet(output)
locator1.AutomaticOn()
timer.StartTimer()
locator1.BuildLocator()
timer.StopTimer()
time = timer.GetElapsedTime()
print("Build Cell Tree Locator: {0}".format(time))
# Probe the dataset with FindClosestPoint() and time it
timer.StartTimer()
for i in range(0, numProbes):
treeClosest.SetId(
i,
locator1.FindCell(ProbeCells.GetPoint(i), 0.001, genCell, pc, weights))
opTime = timer.GetElapsedTime()
print(" Find cell probing: {0}".format(opTime))
# Time the deletion of the locator. The standard locator is quite slow due
# to fragmented memory.
timer.StartTimer()
del locator
timer.StopTimer()
time2 = timer.GetElapsedTime()
print(" Delete Cell Locator: {0}".format(time2))
print(" Cell Locator (Total): {0}".format(time+opTime+time2))
print("\n")
#############################################################
# Time the creation and building of the cell tree locator
locator1 = vtk.vtkCellTreeLocator()
locator1.SetDataSet(output)
locator1.AutomaticOn()
timer.StartTimer()
locator1.BuildLocator()
timer.StopTimer()
time = timer.GetElapsedTime()
print("Build Cell Tree Locator: {0}".format(time))
# Probe the dataset with FindClosestPoint() and time it
timer.StartTimer()
for i in range (0,numProbes):
treeClosest.SetId(i, locator1.FindCell(ProbeCells.GetPoint(i),0.001,genCell,pc,weights))
timer.StopTimer()
opTime = timer.GetElapsedTime()
