def createGlyph(self):
self.polyData = vtk.vtkPolyData()
points = vtk.vtkPoints()
lines = vtk.vtkCellArray()
self.polyData.SetPoints( points )
self.polyData.SetLines( lines )
prevPoint = None
firstPoint = None
for x,y in ((0,0),)*4:
p = points.InsertNextPoint( x, y, 0 )
if prevPoint is not None:
idList = vtk.vtkIdList()
idList.InsertNextId( prevPoint )
idList.InsertNextId( p )
self.polyData.InsertNextCell( vtk.VTK_LINE, idList )
prevPoint = p
if firstPoint is None:
firstPoint = p
# make the last line in the polydata
idList = vtk.vtkIdList()
idList.InsertNextId( p )
idList.InsertNextId( firstPoint )
self.polyData.InsertNextCell( vtk.VTK_LINE, idList )
def copyFirstNLines(self, sourcePolyData, lineCount):
"""make a polydata with only the first N polylines"""
polyData = vtk.vtkPolyData()
points = vtk.vtkPoints()
polyData.SetPoints(points)
lines = vtk.vtkCellArray()
polyData.SetLines(lines)
sourcePoints = sourcePolyData.GetPoints()
sourceLines = sourcePolyData.GetLines()
sourceIdList = vtk.vtkIdList()
sourceLines.InitTraversal()
while sourceLines.GetNextCell(sourceIdList):
pointCount = sourceIdList.GetNumberOfIds()
idList = vtk.vtkIdList()
for idIndex in range(pointCount):
sourceId = sourceIdList.GetId(idIndex)
point = sourcePoints.GetPoint(sourceId)
id = points.InsertNextPoint(point)
idList.InsertNextId(id)
lines.InsertNextCell(idList)
if lines.GetNumberOfCells() > lineCount:
break
return polyData
def Frechet_distances_2(input_vtk_polydata_n, input_vtk_polydata_m):
# compute Frechet distance from an array of fibers to another array
number_of_lines_m = input_vtk_polydata_m.GetNumberOfLines()
number_of_lines_n = input_vtk_polydata_n.GetNumberOfLines()
all_fibers_m = range(0,number_of_lines_m)
all_fibers_n = range(0,number_of_lines_n)
distances = numpy.zeros([number_of_lines_m,number_of_lines_n])
#input_vtk_polydata2 = input_vtk_polydata
input_vtk_polydata_m.GetLines().InitTraversal()
line1_ptids = vtk.vtkIdList()
inpoints1 = input_vtk_polydata_m.GetPoints()
inpoints2 = input_vtk_polydata_n.GetPoints()
for lidx1 in all_fibers_m:
input_vtk_polydata_m.GetLines().GetNextCell(line1_ptids)
input_vtk_polydata_n.GetLines().InitTraversal()
line2_ptids = vtk.vtkIdList()
for lidx2 in all_fibers_n:
input_vtk_polydata_n.GetLines().GetNextCell(line2_ptids)
distances[lidx1,lidx2] = _frechet_distance_internal_use(inpoints1,inpoints2,line1_ptids,line2_ptids)
return distances
def getNumberOfPointsSharedByTwoCells( pd, iCell1, iCell2 ):
'''Compute the number of shared points between iCell1 and iCell2 in the vtkPolyData pd.'''
cell1_points = vtk.vtkIdList()
pd.GetCellPoints( iCell1, cell1_points )
cell2_points = vtk.vtkIdList()
pd.GetCellPoints( iCell2, cell2_points )
cell1_points.IntersectWith( cell2_points )
return cell1_points.GetNumberOfIds()
def __init__(self):
self._Surface = None
self._SeedIds = None
self._SourceSeedIds = vtk.vtkIdList()
self._TargetSeedIds = vtk.vtkIdList()
self.PrintError = None
self.PrintLog = None
self.InputText = None
self.OutputText = None
def VtkLoadElemMesh(self,field,defFScale=0.0,eigenMode=None):
'''Load the element mesh
:param field: scalar field to be represented
:param defFScale: factor to apply to current displacement of nodes
so that the display position of each node equals to
the initial position plus its displacement multiplied
by this factor. In case of modal analysis, the displayed
position of each node equals to the initial position plus
its eigenVector multiplied by this factor.
(Defaults to 0.0, i.e. display of initial/undeformed shape)
:param eigenMode: eigenvibration mode if we want to display the deformed
shape associated with it when a modal analysis has been carried out.
Defaults to None: no modal analysis.
'''
# Define grid
self.nodes= vtk.vtkPoints()
self.gridRecord.uGrid= vtk.vtkUnstructuredGrid()
self.gridRecord.uGrid.SetPoints(self.nodes)
eSet= self.gridRecord.xcSet
eSet.numerate()
self.gridRecord.uGrid.name= eSet.name+'_grid'
# Scalar values.
nodeSet= eSet.getNodes
if(field):
arr= field.fillArray(nodeSet)
field.creaLookUpTable()
# Load nodes in vtk
setNodes= eSet.getNodes
if eigenMode==None:
for n in setNodes:
pos= n.getCurrentPos3d(defFScale)
self.nodes.InsertPoint(n.getIdx,pos.x,pos.y,pos.z)
else:
for n in setNodes:
pos= n.getEigenPos3d(defFScale,eigenMode)
self.nodes.InsertPoint(n.getIdx,pos.x,pos.y,pos.z)
# Load elements in vtk
setElems= eSet.getElements
for e in setElems:
vertices= xc_base.vector_int_to_py_list(e.getIdxNodes)
vtx= vtk.vtkIdList()
for vIndex in vertices:
vtx.InsertNextId(vIndex)
if(e.getVtkCellType!= vtk.VTK_VERTEX):
self.gridRecord.uGrid.InsertNextCell(e.getVtkCellType,vtx)
setConstraints= eSet.getConstraints
for c in setConstraints:
vtx= vtk.vtkIdList()
vtx.InsertNextId(c.getNodeIdx)
if(c.getVtkCellType!= vtk.VTK_LINE):
self.gridRecord.uGrid.InsertNextCell(c.getVtkCellType,vtx)
def createGlyph(self, polyData):
"""
create a brush circle of the right radius in XY space
- assume uniform scaling between XY and RAS which
is enforced by the view interactors
"""
sliceNode = self.sliceWidget.sliceLogic().GetSliceNode()
self.rasToXY.DeepCopy(sliceNode.GetXYToRAS())
self.rasToXY.Invert()
maximum, maxIndex = 0,0
for index in range(3):
if abs(self.rasToXY.GetElement(0, index)) > maximum:
maximum = abs(self.rasToXY.GetElement(0, index))
maxIndex = index
point = [0, 0, 0, 0]
point[maxIndex] = self.radius
xyRadius = self.rasToXY.MultiplyPoint(point)
import math
xyRadius = math.sqrt( xyRadius[0]**2 + xyRadius[1]**2 + xyRadius[2]**2 )
if self.pixelMode:
xyRadius = 0.01
# make a circle paint brush
points = vtk.vtkPoints()
lines = vtk.vtkCellArray()
polyData.SetPoints(points)
polyData.SetLines(lines)
PI = 3.1415926
TWOPI = PI * 2
PIoverSIXTEEN = PI / 16
prevPoint = -1
firstPoint = -1
angle = 0
while angle <= TWOPI:
x = xyRadius * math.cos(angle)
y = xyRadius * math.sin(angle)
p = points.InsertNextPoint( x, y, 0 )
if prevPoint != -1:
idList = vtk.vtkIdList()
idList.InsertNextId(prevPoint)
idList.InsertNextId(p)
polyData.InsertNextCell( vtk.VTK_LINE, idList )
prevPoint = p
if firstPoint == -1:
firstPoint = p
angle = angle + PIoverSIXTEEN
# make the last line in the circle
idList = vtk.vtkIdList()
idList.InsertNextId(p)
idList.InsertNextId(firstPoint)
polyData.InsertNextCell( vtk.VTK_LINE, idList )
def create_cylinder(r=.5, h=1., res=30):
pts = vtk.vtkPoints()
pts.SetNumberOfPoints(10*res)
pd = vtk.vtkPolyData()
pd.Allocate(3*res, 1)
ang = 2*math.pi/res
ind = 0
for sign in [-1, 1]:
y = sign*h/2
for i in range(res):
c0, s0 = math.cos(i*ang), math.sin(i*ang)
c1, s1 = math.cos((i+1)*ang), math.sin((i+1)*ang)
x0, z0 = round(r*c0, 6), round(r*s0, 6)
x1, z1 = round(r*c1, 6), round(r*s1, 6)
pts.InsertPoint(ind, 0, y, 0)
pts.InsertPoint(ind+1, x0, y, z0)
pts.InsertPoint(ind+2, x1, y, z1)
tri = vtk.vtkIdList()
[ tri.InsertNextId(ind+j) for j in range(3) ]
t = pd.InsertNextCell(vtk.VTK_TRIANGLE, tri)
ind += 3
if sign == 1:
pd.ReverseCell(t)
pts.InsertPoint(ind, x0, -h/2, z0)
pts.InsertPoint(ind+1, x0, y, z0)
pts.InsertPoint(ind+2, x1, y, z1)
pts.InsertPoint(ind+3, x1, -h/2, z1)
poly = vtk.vtkIdList()
[ poly.InsertNextId(ind+j) for j in range(4) ]
pd.InsertNextCell(vtk.VTK_POLYGON, poly)
ind += 4
pd.SetPoints(pts)
prod = vtk.vtkTrivialProducer()
prod.SetOutput(pd)
return prod
def getDual( pd ):
'''Get the dual of a vtkPolyData. The finite parts only.'''
pd.BuildLinks()
cells = vtk.vtkCellArray()
points = vtk.vtkPoints()
for iPt in range(pd.GetNumberOfPoints()):
neighbor_cellIds = vtk.vtkIdList()
pd.GetPointCells( iPt, neighbor_cellIds )
if neighbor_cellIds.GetNumberOfIds() < 3:
continue
# sort the neighbor_cellIds into a ring around iPt
sorted_neighbor_cellIds = [ neighbor_cellIds.GetId( 0 ) ]
for it in range( neighbor_cellIds.GetNumberOfIds() - 1 ):
for iicell in range( 1, neighbor_cellIds.GetNumberOfIds() ):
icell = neighbor_cellIds.GetId( iicell )
if icell in sorted_neighbor_cellIds:
continue
# does this cell share exactly two vertices with the last one in the list?
if getNumberOfPointsSharedByTwoCells( pd, sorted_neighbor_cellIds[-1], icell ) == 2:
sorted_neighbor_cellIds += [ icell ]
break
if len( sorted_neighbor_cellIds ) < neighbor_cellIds.GetNumberOfIds():
continue # was a boundary vertex or non-manifold
if not getNumberOfPointsSharedByTwoCells( pd, sorted_neighbor_cellIds[-1], sorted_neighbor_cellIds[0] ) == 2:
continue # boundary vertex, in the case where cell id 0 was on the boundary
# make a face around this vertex: a new point at each centroid of the neighboring cells
cells.InsertNextCell( neighbor_cellIds.GetNumberOfIds() )
for id in sorted_neighbor_cellIds:
# find centroid of this cell
neighbor_verts = vtk.vtkIdList()
pd.GetCellPoints( id, neighbor_verts )
c = (0,0,0)
for iiv in range(neighbor_verts.GetNumberOfIds()):
iv = neighbor_verts.GetId(iiv)
p = pd.GetPoint( iv )
c = add( c, p )
c = mul( c, 1.0 / neighbor_verts.GetNumberOfIds() )
# insert the centroid as a point and as an index into the new face
cells.InsertCellPoint( points.InsertNextPoint( c ) )
dual_pd = vtk.vtkPolyData()
dual_pd.SetPoints( points )
dual_pd.SetPolys( cells )
# merge duplicate points
cleaner = vtk.vtkCleanPolyData()
if vtk.vtkVersion.GetVTKMajorVersion() >= 6:
cleaner.SetInputData( dual_pd )
else:
cleaner.SetInput( dual_pd )
cleaner.SetTolerance(0.0001)
cleaner.Update()
return cleaner.GetOutput()
def __get_common_cells(self,p1,p2,exclude=-1):
"""
Get all the cells containing p1 and p2
"""
cell_list_1 = vtk.vtkIdList()
self.__vtk_model.GetPointCells(p1,cell_list_1)
nb_ids = cell_list_1.GetNumberOfIds()
cell_list_1 = [cell_list_1.GetId(j) for j in xrange(nb_ids)]
cell_list_2 = vtk.vtkIdList()
self.__vtk_model.GetPointCells(p2,cell_list_2)
nb_ids = cell_list_2.GetNumberOfIds()
cell_list_2 = [cell_list_2.GetId(j) for j in xrange(nb_ids)]
common_cells = [cell for cell in cell_list_1 if cell in cell_list_2 and cell!=exclude]
return common_cells
def GetConnectedVertices(self, connectedVerticesIDList, polyData, pointID):
# Return IDs of all the vertices that compose the first neighbor.
cellList = vtk.vtkIdList()
connectedVerticesIDList.InsertUniqueId(pointID)
# Get cells that vertex 'pointID' belongs to
polyData.GetPointCells(pointID, cellList)
numberOfIds = cellList.GetNumberOfIds()
for i in range(0, numberOfIds):
# Get points which compose all cells
pointIdList = vtk.vtkIdList()
polyData.GetCellPoints(cellList.GetId(i), pointIdList)
for j in range(0, pointIdList.GetNumberOfIds()):
connectedVerticesIDList.InsertUniqueId(pointIdList.GetId(j))
return connectedVerticesIDList
def generateMesh(self, x, y, z, in_x, in_y, in_z):
x_coord = vtk.vtkFloatArray()
x_coord.InsertNextValue(x)
y_coord = vtk.vtkFloatArray()
y_coord.InsertNextValue(y)
z_coord = vtk.vtkFloatArray()
z_coord.InsertNextValue(z)
grid = vtk.vtkRectilinearGrid()
grid.SetDimensions(self.nx if in_x else 1, self.ny if in_y else 1, self.nz if in_z else 1)
grid.SetXCoordinates(self.x_coords if in_x else x_coord);
grid.SetYCoordinates(self.y_coords if in_y else y_coord);
grid.SetZCoordinates(self.z_coords if in_z else z_coord);
# We're going to generate all of the IDs of the cells in that rectilinear grid so we can extract them as an UnstructuredGrid
# Why would we do such a thing? Because there is some bug associated with RecitilinearGrids and clipping / rendering
# So, instead I'm going to use RectilinearGrid for generating the cells and then "copy" it to an UnstructuredGrid using ExtractCells
num_cells = grid.GetNumberOfCells()
id_list = vtk.vtkIdList()
for i in xrange(num_cells):
id_list.InsertNextId(i)
extract = vtk.vtkExtractCells()
if vtk.VTK_MAJOR_VERSION <= 5:
extract.SetInput(grid)
else:
extract.SetInputData(grid)
extract.SetCellList(id_list)
return extract.GetOutput()
def testStartingWithTwoCells():
points = vtk.vtkPoints()
points.InsertNextPoint((0., 0., 0.))
points.InsertNextPoint((2., 0., 0.))
points.InsertNextPoint((2., 1., 0.))
points.InsertNextPoint((0., 1., 0.))
pdata = vtk.vtkPolyData()
pdata.SetPoints(points)
pdata.Allocate(2, 1)
ptIds = vtk.vtkIdList()
ptIds.SetNumberOfIds(3)
ptIds.SetId(0, 0)
ptIds.SetId(1, 1)
ptIds.SetId(2, 2)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
ptIds.SetId(0, 2)
ptIds.SetId(1, 3)
ptIds.SetId(2, 0)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
rs = RefineSurface(pdata)
rs.refine(max_edge_length=1.1)
assert(rs.getVtkPolyData().GetNumberOfPolys() == 8)
def __init__(self):
pypes.pypeScript.__init__(self)
self.Surface = None
self.ResolutionArrayName = 'ResolutionArray'
self.RBFType = 'biharmonic'
self.Spheres = vtk.vtkPolyData()
self.SphereIds = vtk.vtkIdList()
self.vmtkRenderer = None
self.OwnRenderer = 0
self.DisplayArray = False
self.SurfaceMapper = None
self.CurrentSphereId = -1
self.SphereWidget = None
self.Opacity = 1.
self.SpheresActor = None
self.ScalarBarActor = None
self.InteractionMode = 0
self.ExamineSurface = None
self.ExamineSpheres = vtk.vtkPolyData()
self.ExamineSpheresActor = None
self.ExamineText = None
self.SetScriptName('vtksurfaceresolution')
self.SetInputMembers([
['Surface','i','vtkPolyData',1,'','the input surface','vmtksurfacereader'],
['ResolutionArrayName','resolutionarray','str',1,'','array storing the desired edge length'],
['RBFType','rbftype','str',1,'["thinplatespline","biharmonic","triharmonic"]','the type of RBF interpolation'],
['Opacity','opacity','float',1,'(0.0,1.0)','object opacities in the scene'],
['vmtkRenderer','renderer','vmtkRenderer',1,'','external renderer']
])
self.SetOutputMembers([
['Surface','o','vtkPolyData',1,'','','vmtksurfacewriter']
])
def convert_to_polydata(self):
"""Convert fiber array to vtkPolyData object."""
outpd = vtk.vtkPolyData()
outpoints = vtk.vtkPoints()
outlines = vtk.vtkCellArray()
outlines.InitTraversal()
for lidx in range(0, self.number_of_fibers):
cellptids = vtk.vtkIdList()
for pidx in range(0, self.points_per_fiber):
idx = outpoints.InsertNextPoint(self.fiber_array_r[lidx, pidx],
self.fiber_array_a[lidx, pidx],
self.fiber_array_s[lidx, pidx])
cellptids.InsertNextId(idx)
outlines.InsertNextCell(cellptids)
# put data into output polydata
outpd.SetLines(outlines)
outpd.SetPoints(outpoints)
return outpd
def _findAndSetGeometryReference(self, referencedSeriesUID, segmentationNode):
shn = slicer.vtkMRMLSubjectHierarchyNode.GetSubjectHierarchyNode(slicer.mrmlScene)
segID = shn.GetItemByDataNode(segmentationNode)
parentID = shn.GetItemParent(segID)
childIDs = vtk.vtkIdList()
shn.GetItemChildren(parentID, childIDs)
uidName = slicer.vtkMRMLSubjectHierarchyConstants.GetDICOMUIDName()
matches = []
for childID in reversed([childIDs.GetId(id) for id in range(childIDs.GetNumberOfIds()) if segID]):
if childID == segID:
continue
if shn.GetItemUID(childID, uidName) == referencedSeriesUID:
if shn.GetItemDataNode(childID):
matches.append(shn.GetItemDataNode(childID))
reference = None
if len(matches):
if any(x.GetAttribute("DICOM.RWV.instanceUID") is not None for x in matches):
for x in matches:
if x.GetAttribute("DICOM.RWV.instanceUID") is not None:
reference = x
break
else:
reference = matches[0]
if reference:
segmentationNode.SetReferenceImageGeometryParameterFromVolumeNode(reference)
def pd_to_array(inpd, dims=225):
count_vol = numpy.ndarray([dims,dims,dims])
ptids = vtk.vtkIdList()
points = inpd.GetPoints()
data_vol = []
# check for cell data
cell_data = inpd.GetCellData().GetScalars()
if cell_data:
data_vol = numpy.ndarray([dims,dims,dims])
# loop over lines
inpd.GetLines().InitTraversal()
print "<filter.py> Input number of points: ",\
points.GetNumberOfPoints(),\
"lines:", inpd.GetNumberOfLines()
# loop over all lines
for lidx in range(0, inpd.GetNumberOfLines()):
# progress
#if verbose:
# if lidx % 1 == 0:
# print "<filter.py> Line:", lidx, "/", inpd.GetNumberOfLines()
inpd.GetLines().GetNextCell(ptids)
num_points = ptids.GetNumberOfIds()
for pidx in range(0, num_points):
point = points.GetPoint(ptids.GetId(pidx))
# center so that 0,0,0 moves to 100,100,100
point = numpy.round(numpy.array(point) + 110)
count_vol[point[0], point[1], point[2]] += 1
if cell_data:
data_vol[point[0], point[1], point[2]] += cell_data.GetTuple(lidx)[0]
return count_vol, data_vol
def array2vtkIdList(num_array, vtk_idlist=None):
"""Converts a numpy array/Python list to a vtkIdList object.
Parameters
----------
- num_array : numpy array or Python list/tuple
The input array must be 2D with `shape[1] == 3`.
- vtk_idlist : `vtkIdList` (default: `None`)
If an optional `vtkIdList` instance, is passed as an argument
then a new array is not created and returned. The passed array
is itself modified and returned.
"""
if vtk_idlist:
ids = vtk_idlist
else:
ids = vtk.vtkIdList()
arr = numpy.asarray(num_array)
assert len(arr.shape) == 1, "Array for vtkIdList must be 1D"
ids.SetNumberOfIds(len(arr))
for i, j in enumerate(arr):
ids.SetId(i, j)
return ids
def testTwoTrianglesCoplanar():
"Two triangles"
# create set of points
points = vtk.vtkPoints()
points.SetNumberOfPoints(4)
points.SetPoint(0, [0., 0., 0.])
points.SetPoint(1, [1., 0., 0.])
points.SetPoint(2, [0., 1., 0.])
points.SetPoint(3, [1., 1., 0.])
# create vtkPolyData object
pdata = vtk.vtkPolyData()
pdata.SetPoints(points)
pdata.Allocate(2, 1)
ptIds = vtk.vtkIdList()
ptIds.SetNumberOfIds(3)
ptIds.SetId(0, 0)
ptIds.SetId(1, 1)
ptIds.SetId(2, 2)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
ptIds.SetId(0, 1)
ptIds.SetId(1, 3)
ptIds.SetId(2, 2)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
for order in range(1, 6):
lslm = PoissonSolver(pdata,
max_edge_length=1000.,
order=order)
print('order = ', order)
print('g matrix: ', lslm.getGreenMatrix())
def compute_max_array_along_lines(pd, array_name, output_array_name):
lines = pd.GetLines()
point_array = pd.GetPointData().GetArray(array_name)
point_array_max = vtk.vtkFloatArray()
point_array_lines_list = list()
point_array_max_list = list()
lines.InitTraversal()
for lidx in range(0, pd.GetNumberOfLines()):
if (lidx % 100) == 0:
print lidx, '/', pd.GetNumberOfLines()
pts = vtk.vtkIdList()
lines.GetNextCell(pts)
# compute mean POINT_ARRAY for this line
if pts.GetNumberOfIds():
point_array_list = list()
for pidx in range(0, pts.GetNumberOfIds()):
point_array_list.append(point_array.GetTuple1(pts.GetId(pidx)))
point_array_max.InsertNextTuple1(numpy.max(numpy.array(point_array_list)))
#fa_max.InsertNextTuple1(numpy.median(numpy.array(fa_list)))
else:
point_array_max.InsertNextTuple1(0.0)
point_array_max.SetName(output_array_name)
outpd = pd
outpd.GetCellData().AddArray(point_array_max)
outpd.GetCellData().SetActiveScalars(output_array_name)
return outpd
def ReadTecplotSurfaceFile(self):
self.PrintLog('Reading Tecplot surface file.')
f=open(self.InputFileName, 'r')
line = f.readline()
if line.split()[0] == 'TITLE':
line = f.readline()
if (line.split()[0] == 'VARIABLES') | (line.split('=')[0] == 'VARIABLES'):
arrayNames = line.split('=')[1].strip().split(',')
arrayNames[0:3] = []
self.PrintLog("ArrayNames" + str(arrayNames))
line = f.readline()
if line.split()[0] == 'ZONE':
lineNid = line.find('N=')
lineN = line[lineNid : lineNid+line[lineNid:].find(',') ].split('=')[1]
numberOfNodes = int(lineN)
lineEid = line.find('E=')
lineE = line[lineEid : lineEid+line[lineEid:].find(',') ].split('=')[1]
numberOfElements = int(lineE)
elementType = 'TRIANGLE'
if line.find('ET=') != -1:
if 'TRIANGLE' in line:
elementType = 'TRIANGLE'
elif 'QUADRILATERAL' in line:
elementType = 'QUADRILATERAL'
self.PrintLog("Reading " + str(numberOfNodes)+" nodes.")
points = vtk.vtkPoints()
cells = vtk.vtkCellArray()
points.SetNumberOfPoints(numberOfNodes)
self.Surface = vtk.vtkPolyData()
self.Surface.SetPoints(points)
self.Surface.SetPolys(cells)
for arrayName in arrayNames:
array = vtk.vtkDoubleArray()
array.SetName(arrayName)
array.SetNumberOfTuples(numberOfNodes)
self.Surface.GetPointData().AddArray(array)
self.Surface.Update()
data = f.read().split()
dataCounter = 0
for i in range(numberOfNodes):
point = [float(data[dataCounter]),float(data[dataCounter+1]),float(data[dataCounter+2])]
dataCounter += 3
points.SetPoint(i,point)
for j in range(len(arrayNames)):
self.Surface.GetPointData().GetArray(arrayNames[j]).SetComponent(i,0,float(data[dataCounter]))
dataCounter += 1
self.PrintLog("Reading " + str(numberOfElements)+" elements.")
cellIds = vtk.vtkIdList()
for i in range(numberOfElements):
cellIds.Initialize()
cellIds.InsertNextId(int(data[dataCounter])-1)
dataCounter += 1
cellIds.InsertNextId(int(data[dataCounter])-1)
dataCounter += 1
cellIds.InsertNextId(int(data[dataCounter])-1)
dataCounter += 1
if elementType == "QUADRILATERAL":
cellIds.InsertNextId(int(data[dataCounter])-1)
dataCounter += 1
cells.InsertNextCell(cellIds)
def testStartingWithTwoCells():
points = vtk.vtkPoints()
points.InsertNextPoint((0., 0., 0.))
points.InsertNextPoint((2., 0., 0.))
points.InsertNextPoint((2., 1., 0.))
points.InsertNextPoint((0., 1., 0.))
pdata = vtk.vtkPolyData()
pdata.SetPoints(points)
pdata.Allocate(2, 1)
ptIds = vtk.vtkIdList()
ptIds.SetNumberOfIds(3)
ptIds.SetId(0, 0)
ptIds.SetId(1, 1)
ptIds.SetId(2, 2)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
ptIds.SetId(0, 2)
ptIds.SetId(1, 3)
ptIds.SetId(2, 0)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
rs = CoarsenSurface(pdata)
rs.coarsen(min_cell_area=1.e-5)
assert(rs.getVtkPolyData().GetNumberOfPolys() == 2)
def testSingleTriangle():
"Single triangle"
h = 0.1
# create set of points
points = vtk.vtkPoints()
points.SetNumberOfPoints(3)
points.SetPoint(0, [1., -1.*h/3., -1.*h/3.])
points.SetPoint(1, [1., 2.*h/3., -1.*h/3.])
points.SetPoint(2, [1., -1.*h/3., 2.*h/3.])
# create vtkPolyData object
pdata = vtk.vtkPolyData()
pdata.SetPoints(points)
ptIds = vtk.vtkIdList()
ptIds.SetNumberOfIds(3)
ptIds.SetId(0, 0)
ptIds.SetId(1, 1)
ptIds.SetId(2, 2)
pdata.Allocate(1, 1)
pdata.InsertNextCell(vtk.VTK_POLYGON, ptIds)
for order in range(1, 6):
lslm = PoissonSolver(pdata, max_edge_length=1000.)
print('order = ', order)
print('g matrix: ', lslm.getGreenMatrix())
def createCurtain( self, **args ):
trajectory_points = self.getTrajectoryPoints( **args )
extent = self.input().GetExtent()
spacing = self.input().GetSpacing()
nStrips = extent[5] - extent[4]
zmax = spacing[2] * nStrips
z_inc = zmax / nStrips
polydata = vtk.vtkPolyData()
stripArray = vtk.vtkCellArray()
stripData = [ vtk.vtkIdList() for ix in range(nStrips) ]
points = vtk.vtkPoints()
for iPt in range( trajectory_points.GetNumberOfPoints() ):
pt_coords = trajectory_points.GetPoint( iPt )
z = 0.0
for iLevel in range( nStrips ):
vtkId = points.InsertNextPoint( pt_coords[0], pt_coords[1], z )
sd = stripData[ iLevel ]
sd.InsertNextId( vtkId )
sd.InsertNextId( vtkId+1 )
z = z + z_inc
points.InsertNextPoint( pt_coords[0], pt_coords[1], z )
for strip in stripData:
stripArray.InsertNextCell(strip)
polydata.SetPoints( points )
polydata.SetStrips( stripArray )
return polydata
def __init__(self):
vmtkSeedSelector.__init__(self)
self.PickedSeedIds = vtk.vtkIdList()
self.PickedSeeds = vtk.vtkPolyData()
self.vmtkRenderer = None
self.OwnRenderer = 0
self.Script = None
def __init__(self, pdata, max_edge_length, order=5):
"""
Constructor
@param pdata instance of vtkPolyData
@param max_edge_length maximum edge length, used to turn
polygons into triangles
"""
# triangulate
rs = RefineSurface(pdata)
rs.refine(max_edge_length=max_edge_length)
self.pdata = rs.getVtkPolyData()
# store the point indices for each cell
self.ptIdList = []
ptIds = vtk.vtkIdList()
polys = self.pdata.GetPolys()
polys.InitTraversal()
for i in range(polys.GetNumberOfCells()):
polys.GetNextCell(ptIds)
assert(ptIds.GetNumberOfIds() == 3)
self.ptIdList.append([ptIds.GetId(0),
ptIds.GetId(1),
ptIds.GetId(2)])
self.points = self.pdata.GetPoints()
self.polys = self.pdata.GetPolys()
self.numTriangles = self.polys.GetNumberOfCells()
# order of the integration, method dependent
self.order = order
# set in the derived classes
self.responseName = 'NO-SET'
self.sourceName = 'NOT-SET'
def setSourceFromExpression(self, expression):
"""
Set the source from expression
@param expression expression of x, y, and z
"""
from math import sqrt, pi, sin, cos, tan, log, exp
n = self.pdata.GetNumberOfPolys()
sourceData = vtk.vtkDoubleArray()
sourceData.SetNumberOfComponents(1)
sourceData.SetNumberOfTuples(n)
sourceData.SetName(self.sourceName)
midPoint = numpy.zeros((3,), numpy.float64)
ptIds = vtk.vtkIdList()
cells = self.pdata.GetPolys()
cells.InitTraversal()
for i in range(n):
cell = cells.GetNextCell(ptIds)
npts = ptIds.GetNumberOfIds()
midPoint *= 0 # reset
for j in range(npts):
midPoint += self.points.GetPoint(ptIds.GetId(j))
midPoint /= float(npts)
x, y, z = midPoint
v = eval(expression)
sourceData.SetTuple(i, [v])
self.pdata.GetCellData().AddArray(sourceData)
def extrude (pts, z, h):
cell = vtk.vtkIdList()
vtk_pts = vtk.vtkPoints()
vtk_pts.SetDataTypeToDouble()
[ (vtk_pts.InsertNextPoint(pt[0], pt[1], z), cell.InsertNextId(i)) for i, pt in enumerate(pts) ]
pd = vtk.vtkPolyData()
pd.Allocate(1, 1)
pd.SetPoints(vtk_pts)
pd.InsertNextCell(vtk.VTK_POLYGON, cell)
prod = vtk.vtkTrivialProducer()
prod.SetOutput(pd)
extr = vtk.vtkLinearExtrusionFilter()
extr.SetInputConnection(prod.GetOutputPort())
extr.SetVector(0, 0, h)
pn = vtk.vtkPolyDataNormals()
pn.SetInputConnection(extr.GetOutputPort())
pn.AutoOrientNormalsOn()
return pn
def convertFiducialHierarchyToVtkIdList(hierarchyNode,volumeNode):
outputIds = vtk.vtkIdList()
if not hierarchyNode or not volumeNode:
return outputIds
if isinstance(hierarchyNode,slicer.vtkMRMLMarkupsFiducialNode) and isinstance(volumeNode,slicer.vtkMRMLScalarVolumeNode):
image = volumeNode.GetImageData()
# now we have the children which are fiducialNodes - let's loop!
for n in range(hierarchyNode.GetNumberOfFiducials()):
currentCoordinatesRAS = [0,0,0]
# grab the current coordinates
hierarchyNode.GetNthFiducialPosition(n,currentCoordinatesRAS)
# convert the RAS to IJK
currentCoordinatesIJK = LevelSetSegmentationWidget.ConvertRAStoIJK(volumeNode,currentCoordinatesRAS)
# strip the last element since we need a 3based tupel
currentCoordinatesIJKlist = (int(currentCoordinatesIJK[0]),int(currentCoordinatesIJK[1]),int(currentCoordinatesIJK[2]))
outputIds.InsertNextId(int(image.ComputePointId(currentCoordinatesIJKlist)))
# IdList was created, return it even if it might be empty
return outputIds
def cpnonzerocolor(data):
CellIdList = vtk.vtkIdList()
CellIdList.Reset()
colors = data.GetCellData().GetScalars()
count = 0
# Get indices from nonzero colored cells
for i in range(data.GetNumberOfCells()):
if ( colors.GetTuple(i) != (0.0, 0.0, 0.0, 0.0) ):
CellIdList.InsertId(count, i)
count = count + 1
# print "Number Of cell:\t",i
# print "Number of cell added:\t",count
else:
pass
# Extract cells with nonzero color from data
extractor = vtk.vtkExtractCells()
extractor.SetInputData(data)
extractor.SetCellList(CellIdList)
extractor.Modified()
extractor.Update()
print "Number of nodes in clipped subvolume:\t",extractor.GetOutput().GetNumberOfPoints()
print "Number of egdes in clipped subvolume:\t",extractor.GetOutput().GetNumberOfCells()
# rearrange the id's of the cells and points - consecutive increasing ids
print "...extracted zerocolor cells."
return extractor.GetOutput()
def add_point_data_array(inpd, data, array_name):
"""Make a vtk point data array from input data array and add to inpd.
Input data must have dimensions of the number of lines in the
input polydata. The output array will be added to the polydata and
will be point data, so the per-line values will be duplicated to
become per-point values (each point on the line) for visualization.
"""
ptids = vtk.vtkIdList()
inpd.GetLines().InitTraversal()
outarray = vtk.vtkFloatArray()
outarray.SetName(array_name)
for lidx in range(0, inpd.GetNumberOfLines()):
inpd.GetLines().GetNextCell(ptids)
for pidx in range(0, ptids.GetNumberOfIds()):
outarray.InsertNextTuple1(data[lidx])
inpd.GetPointData().AddArray(outarray)
def getCellValue(vtkSGrid2D, newPoint2D, cellID, valarray):
pcoords = [0.0, 0.0, 0.0]
weights = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
clspoint = [0., 0., 0.]
tmpid = vtk.mutable(0)
vtkid2 = vtk.mutable(0)
vtkcell2D = vtk.vtkQuad()
vtkcell2D = vtkSGrid2D.GetCell(cellID)
tmpres = vtkcell2D.EvaluatePosition(newPoint2D, clspoint, tmpid, pcoords,
vtkid2, weights)
# print(newPoint2D, clspoint, tmpid, pcoords, vtkid2, weights)
idlist1 = vtk.vtkIdList()
numpts = vtkcell2D.GetNumberOfPoints()
idlist1 = vtkcell2D.GetPointIds()
tmpVal = 0.0
for x in range(0, numpts):
tmpVal = tmpVal + weights[x] * valarray.GetTuple(idlist1.GetId(x))[0]
return tmpVal
def measure_line_lengths(inpd):
ptids = vtk.vtkIdList()
points = inpd.GetPoints()
output_lengths = numpy.zeros(inpd.GetNumberOfLines())
# loop over lines
inpd.GetLines().InitTraversal()
print("<filter.py> Input number of points: ",\
points.GetNumberOfPoints(),\
"lines:", inpd.GetNumberOfLines())
# loop over all lines
for lidx in range(0, inpd.GetNumberOfLines()):
# progress
#if verbose:
# if lidx % 1 == 0:
# print "<filter.py> Line:", lidx, "/", inpd.GetNumberOfLines()
inpd.GetLines().GetNextCell(ptids)
output_lengths[lidx] = ptids.GetNumberOfIds()
return (output_lengths)
def read_vtk(self, datadir='data', file_name='spines.vtk'):
"""
Read the spines from a vtk file.
call signature:
read_vtk(datadir='data', file_name='spines.vtk')
Arguments:
*datadir*:
Target data directory.
*file_name*:
Target file name.
"""
import numpy as np
import os as os
try:
import vtk as vtk
except:
print("Warning: no vtk library found.")
reader = vtk.vtkPolyDataReader()
reader.SetFileName(os.path.join(datadir, file_name))
reader.Update()
output = reader.GetOutput()
# Read the spines.
points = output.GetPoints()
cells = output.GetLines()
id_list = vtk.vtkIdList()
self.spines = []
offset = 0
for cell_idx in range(cells.GetNumberOfCells()):
cells.GetNextCell(id_list)
n_points = id_list.GetNumberOfIds()
point_array = np.zeros((n_points, 3))
for point_idx in range(n_points):
point_array[point_idx] = points.GetPoint(point_idx + offset)
offset += n_points
self.spines.append(point_array)
self.spines = np.array(self.spines)
def getCellIDsAtXY(self, x, y):
bounds = self._grid.GetBounds()
p1 = [x, y, bounds[-1]]
p2 = [x, y, bounds[-2]]
cell_ids = vtk.vtkIdList()
self._cell_finder.FindCellsAlongLine(p1, p2, 1, cell_ids)
def linepoints(y):
return np.array(p1)[np.newaxis, :] + y[:, np.newaxis] * (
np.array(p2)[np.newaxis, :] - np.array(p1)[np.newaxis, :])
search = 1
yi = np.array([0, .5, 1])
points = (linepoints(yi))
ids = []
i = 0
for point in points:
iD = (self.getCellId(point[0], point[1], point[2]))
if (iD not in ids) and (iD != -1):
ids.append(iD)
while (search):
new_yi = (yi[:-1] + yi[1:]) / 2.
points = linepoints(new_yi)
for point in points:
iD = (self.getCellId(point[0], point[1], point[2]))
if (iD not in ids) and (iD != -1):
ids.append(iD)
i += 1
dist = np.abs((points[:-1] - points[1:]))[0, 2]
if len(ids) == 3:
search = 0
elif dist < 1e-3:
search = 0
if len(ids) < 1:
raise ValueError("It seems like some trees are located " +
"outside the ogs bulk mesh!" +
" Please check for consistency.")
elif i == 1e4:
search = 0
raise ValueError("Search algorithm failed! Please improve" +
" algorithm!")
yi = np.concatenate((yi, new_yi))
yi.sort()
return ids
def per_vertex_occlusion_accurate(mesh):
from menpo3d.vtkutils import trimesh_to_vtk
import vtk
tol = mesh.mean_edge_length() / 1000
min_, max_ = mesh.bounds()
z_min = min_[-1] - 10
z_max = max_[-1] + 10
ray_start = mesh.points.copy()
ray_end = mesh.points.copy()
points = mesh.points
ray_start[:, 2] = z_min
ray_end[:, 2] = z_max
vtk_mesh = trimesh_to_vtk(mesh)
obbTree = vtk.vtkOBBTree()
obbTree.SetDataSet(vtk_mesh)
obbTree.BuildLocator()
vtk_points = vtk.vtkPoints()
vtk_cellIds = vtk.vtkIdList()
bad_val = tuple(ray_start[0])
first_intersects = []
for start, end, point in zip(ray_start, ray_end, points):
start = tuple(start)
end = tuple(end)
obbTree.IntersectWithLine(start, end, vtk_points, vtk_cellIds)
data = vtk_points.GetData()
break
for start, end, point in zip(ray_start, ray_end, points):
start = tuple(start)
end = tuple(end)
#obbTree.IntersectWithLine(start, end, vtk_points, vtk_cellIds)
data = vtk_points.GetData()
if data.GetNumberOfTuples() > 0:
first_intersects.append(data.GetTuple3(0))
else:
first_intersects.append(bad_val)
visible = np.linalg.norm(points - np.array(first_intersects), axis=1) < tol
return visible
def writeExodusIIGrid(path, points, cellNodes, case):
"""
Methods writes the points and the cells in the Exodus II file format
Args:
path (string): The path where to write the Exodus II mesh
points (list): The coordinates of the nodes of the grid
cellNodes (list): The indices of the points to define the mesh
case (int) The type of the vtk cells
1 = VTK_LINE
2 = VTK_TRIANGLE
3 = VTK_QUAD
4 = VTK_TETRA
"""
mesh = vtkUnstructuredGrid()
vtk_points = vtkPoints()
for point in points:
vtk_points.InsertNextPoint(float(point[0]), float(point[1]),
float(point[2]))
mesh.SetPoints(vtk_points)
for cellNodes in cellNodes:
pts = vtkIdList()
num_local_nodes = len(cellNodes)
pts.SetNumberOfIds(num_local_nodes)
for k, node_index in enumerate(cellNodes):
pts.InsertId(k, int(node_index) - 1)
if case == '1':
mesh.InsertNextCell(VTK_LINE, pts)
if case == '2':
mesh.InsertNextCell(VTK_TRIANGLE, pts)
if case == '3':
mesh.InsertNextCell(VTK_QUAD, pts)
if case == '4':
mesh.InsertNextCell(VTK_TETRA, pts)
writer = vtkExodusIIWriter()
writer.WriteAllTimeStepsOn()
writer.WriteOutBlockIdArrayOn()
writer.WriteOutGlobalNodeIdArrayOn()
writer.WriteOutGlobalElementIdArrayOn()
writer.SetFileName(path)
setInput(mesh, writer)
writer.Write()
def mapPointDataToCellData(ugrid_data,
ugrid_mesh,
field_name,
cell_length_ratio_for_radius=0.5,
verbose=True):
if (verbose): print '*** mapPointDataToCellData ***'
nb_cells = ugrid_mesh.GetNumberOfCells()
filter_cell_centers = vtk.vtkCellCenters()
if (vtk.vtkVersion.GetVTKMajorVersion() >= 6):
filter_cell_centers.SetInputData(ugrid_mesh)
else:
filter_cell_centers.SetInput(ugrid_mesh)
filter_cell_centers.Update()
pdata_mesh_cell_centers = filter_cell_centers.GetOutput()
point_locator = vtk.vtkPointLocator()
point_locator.SetDataSet(ugrid_data)
point_locator.Update()
nb_components = ugrid_data.GetPointData().GetArray(field_name).GetNumberOfComponents()
farray_tensors = createFloatArray(field_name,
nb_components,
nb_cells)
points_within_radius = vtk.vtkIdList()
for num_cell in range(nb_cells):
l = (ugrid_mesh.GetCell(num_cell).GetLength2())**(0.5)
point_locator.FindPointsWithinRadius(l*cell_length_ratio_for_radius,
pdata_mesh_cell_centers.GetPoint(num_cell),
points_within_radius)
#points_in_cell = findPointsInCell(ugrid_data.GetPoints(), ugrid_mesh.GetCell(num_cell))
if (points_within_radius.GetNumberOfIds()):
tensor = sum([numpy.array(ugrid_data.GetPointData().GetArray(field_name).GetTuple(points_within_radius.GetId(num_id))) for num_id in range(points_within_radius.GetNumberOfIds())])/points_within_radius.GetNumberOfIds()
else:
tensor = [0]*nb_components
farray_tensors.InsertTuple(num_cell, tensor)
ugrid_mesh.GetCellData().AddArray(farray_tensors)
def split4(_=False):
r = vtk.vtkSTLReader()
r.SetFileName('Schuerze4.stl')
r.Update()
bnds = Bnds(*r.GetOutput().GetBounds())
y = bnds.y1 / 2
pts = [[bnds.x1 - 1, y, bnds.z1 - 1], [bnds.x2 + 1, y, bnds.z1 - 1],
[bnds.x2 + 1, y, bnds.z2 + 1], [bnds.x1 - 1, y, bnds.z2 + 1]]
if _:
pts.reverse()
cell = vtk.vtkIdList()
vtk_pts = vtk.vtkPoints()
vtk_pts.SetDataTypeToDouble()
[(vtk_pts.InsertNextPoint(pt), cell.InsertNextId(i))
for i, pt in enumerate(pts)]
pd = vtk.vtkPolyData()
pd.Allocate(1, 1)
pd.SetPoints(vtk_pts)
pd.InsertNextCell(vtk.VTK_POLYGON, cell)
prod = vtk.vtkTrivialProducer()
prod.SetOutput(pd)
bf = vtkboolPython.vtkPolyDataBooleanFilter()
bf.SetInputConnection(r.GetOutputPort())
bf.SetInputConnection(1, prod.GetOutputPort())
bf.SetOperModeToDifference()
clean = vtk.vtkCleanPolyData()
clean.SetInputConnection(bf.GetOutputPort())
pn = vtk.vtkPolyDataNormals()
pn.SetInputConnection(clean.GetOutputPort())
pn.AutoOrientNormalsOn()
return pn
def vtkGetLineComponents(surf):
"""vtkds must be polydata describing lines
returns list of index arrays, point coordinates"""
assert isinstance(surf, vtk.vtkPolyData)
components = []
num_points = surf.GetNumberOfPoints()
mask = np.zeros(num_points, dtype=np.int)
component_num = 0
for main_p in xrange(num_points):
if mask[main_p] <> 0: continue
l = []
last_p = -1
p = main_p
component_num += 1
#while mask[p] == 0:
while True:
l.append(p)
if mask[p] <> 0:
break
mask[p] = component_num
pts = []
r = vtk.vtkIdList()
surf.GetPointCells(p, r)
#print "at %i discovered: " % p,
for ci in range(r.GetNumberOfIds()):
c = surf.GetCell(r.GetId(ci))
for i in vtkIterCellPointIds(c):
#print "%i(%s)" % (i, ci),
if not (i == p or i == last_p):
pts.append(i)
#for ci, c in [ (r.GetId(i), surf.GetCell(r.GetId(i))) for i in range(r.GetNumberOfIds()) ]:
#for i in tuple(c.GetPointId(j) for j in range(2)):
#print ""
if not pts:
break
last_p = p
p = pts[0]
if l:
components.append(l)
#print mask
#pprint.pprint(components)
points = np.asarray([surf.GetPoint(j)[:2] for j in xrange(num_points)])
components = [np.asarray(c, dtype=np.int) for c in components]
return components, points
def add_graphics_edges(self, poly_data, color):
pt1 = [0,0,0]
pt2 = [0,0,0]
points = poly_data.GetPoints();
"""
for i in range(points.GetNumberOfPoints()-1):
points.GetPoint(i,pt1)
points.GetPoint(i+1,pt2)
self.add_cyl(pt1, pt2)
"""
poly_data.GetLines().InitTraversal()
idList = vtk.vtkIdList()
while poly_data.GetLines().GetNextCell(idList):
#print(">> Line has " + str(idList.GetNumberOfIds()) + " points." )
node1 = idList.GetId(0)
node2 = idList.GetId(1)
points.GetPoint(node1,pt1)
points.GetPoint(node2,pt2)
self.add_cyl(pt1, pt2)
def compute_descriptor(self, obb, normal, center_disc, radius):
points = []
distances = []
points_disc = self.points_on_disc(normal, center_disc, radius)
for p in points_disc:
point_other_side = -normal * const_values.FLAGS.T + p
point_another_size = normal * const_values.FLAGS.T + p
intersected_points, intersected_cells = vtk.vtkPoints(
), vtk.vtkIdList()
obb.SetTolerance(const_values.FLAGS.tolerance_of_obb)
obb.IntersectWithLine(point_other_side, point_another_size,
intersected_points, intersected_cells)
intersect = []
if intersected_points.GetNumberOfPoints() > 1:
min_distance = np.inf
for i in range(intersected_points.GetNumberOfPoints()):
if np.linalg.norm(p - self.points_to_array(
intersected_points.GetPoint(i))) < min_distance:
min_distance = np.linalg.norm(p - self.points_to_array(
intersected_points.GetPoint(i)))
intersect = self.points_to_array(
intersected_points.GetPoint(i))
vec = p - intersect
vec = vec / np.linalg.norm(vec)
if vec.dot(normal) < 0:
distances.append(-np.linalg.norm(p - intersect))
else:
distances.append(np.linalg.norm(p - intersect))
elif intersected_points.GetNumberOfPoints() == 0:
intersect = p
distances.append(0.0)
else:
intersect = [
intersected_points.GetPoint(0)[x] for x in range(3)
]
distances.append(np.linalg.norm(p - intersect))
intersect = np.array(intersect)
points.append(intersect)
points_mesh = np.array(points)
distances = np.array(distances)
return points_mesh, points_disc, distances
def findNuclearLocalMaximas(mesh, data, nuclear_data, Threshold):
numPts = mesh.GetNumberOfPoints()
localMaxPtList = vtk.vtkIdList()
for ptID in xrange(0, numPts):
pt_list = getConnectedVerticesNotIncludingSeed(mesh, ptID)
seed_data_value = getValue(mesh, ptID, data)
max_found = 1
nuclear_found = 1
for i in xrange(0, pt_list.GetNumberOfIds()):
data_value = getValue(mesh, pt_list.GetId(i), data)
nuclear_value = getValue(mesh, pt_list.GetId(i), nuclear_data)
if (data_value >= seed_data_value):
max_found = 0
if (nuclear_value < Threshold):
nuclear_found = 0
if max_found == 1 and nuclear_found == 1:
localMaxPtList.InsertUniqueId(ptID)
return localMaxPtList
def convertToVTK(self, scalarArray, scalarType):
""" Convert fibers in array form to VTK polydata.
INPUT:
scalarArray - Variable containing scalar information pertaining
to VTK polydata
scalarType - Type of quantitative scalar (ie. FA, T1) to be
included with the poyldata
OUTPUT:
outVTK - Tractography polydata in VTK form
"""
outVTK = vtk.vtkPolyData()
outPts = vtk.vtkPoints()
outFibers = vtk.vtkCellArray()
outScalars = vtk.vtkFloatArray()
outFibers.InitTraversal()
# Get fiber information to convert to VTK form
for fidx in range(0, self.no_of_fibers):
ptIds = vtk.vtkIdList()
for pidx in range(0, self.pts_per_fiber):
idx = outPts.InsertNextPoint(self.fiberArray_x[fidx, pidx],
self.fiberArray_y[fidx, pidx],
self.fiberArray_z[fidx, pidx])
ptIds.InsertNextId(idx)
outScalars.InsertNextValue\
(float(scalarArray.fiberTree_scalar[fidx][pidx][scalarType]))
outFibers.InsertNextCell(ptIds)
# Group data into VTK format
outVTK.SetLines(outFibers)
outVTK.SetPoints(outPts)
outVTK.GetPointData().SetScalars(outScalars)
return outVTK
def main():
origin = [0.0, 0.0, 0.0]
p0 = [1.0, 0.0, 0.0]
p1 = [0.0, 1.0, 0.0]
p2 = [0.0, 1.0, 2.0]
p3 = [1.0, 2.0, 3.0]
# Create a vtkPoints object and store the points in it.
points = vtk.vtkPoints()
points.InsertNextPoint(origin)
points.InsertNextPoint(p0)
points.InsertNextPoint(p1)
points.InsertNextPoint(p2)
points.InsertNextPoint(p3)
# Create a cell array to store the lines in and add the lines to it.
lines = vtk.vtkCellArray()
# Create four lines.
for i in range(4):
line = vtk.vtkLine()
line.GetPointIds().SetId(0, i)
line.GetPointIds().SetId(1, i + 1)
lines.InsertNextCell(line)
# Create a polydata to store everything in.
linesPolyData = vtk.vtkPolyData()
# Add the points to the dataset.
linesPolyData.SetPoints(points)
# Add the lines to the dataset.
linesPolyData.SetLines(lines)
print("There are {0} lines.".format(linesPolyData.GetNumberOfLines()))
linesPolyData.GetLines().InitTraversal()
idList = vtk.vtkIdList()
while(linesPolyData.GetLines().GetNextCell(idList)):
print("Line has {0} points".format(idList.GetNumberOfIds()))
for pointId in range(idList.GetNumberOfIds() - 1):
print("{0} {1}".format(idList.GetId(pointId), idList.GetId(pointId + 1)))
def triangulate(pd):
"""
Generates a triangle mesh for a spherical point cloud. It is assumed that
'pd' is an object of dsa.PolyData type.
"""
# Project on a sphere
sphereXyz = alg.norm(pd.Points) * np.linalg.norm(pd.Points, axis=1).mean()
sphereXyz = np.around(sphereXyz, decimals=2)
sphereArr = dsa.numpyTovtkDataArray(sphereXyz, name='SpherePts')
pts = v.vtkPoints()
pts.SetData(sphereArr)
sphere = v.vtkPolyData()
sphere.SetPoints(pts)
# Store the original point ids
idf = v.vtkIdFilter()
idf.SetIdsArrayName('PointIds')
idf.PointIdsOn()
idf.SetInputData(sphere)
# Delaunay3D to make a convex hull
d3d = v.vtkDelaunay3D()
d3d.SetInputConnection(idf.GetOutputPort())
# Extract the surface
surf = v.vtkDataSetSurfaceFilter()
surf.SetInputConnection(d3d.GetOutputPort())
surf.Update()
# Now make a new cell array mapping to the old ids
polyCells = v.vtkCellArray()
sphereCells = surf.GetOutput().GetPolys()
sphereCells.InitTraversal()
origIds = surf.GetOutput().GetPointData().GetArray('PointIds')
ptIds = v.vtkIdList()
while (sphereCells.GetNextCell(ptIds)):
polyCells.InsertNextCell(3)
polyCells.InsertCellPoint(int(origIds.GetTuple1(ptIds.GetId(0))))
polyCells.InsertCellPoint(int(origIds.GetTuple1(ptIds.GetId(1))))
polyCells.InsertCellPoint(int(origIds.GetTuple1(ptIds.GetId(2))))
return polyCells
def generateMeshPolyData(points):
pts = v.vtkPoints()
for p in points:
pts.InsertNextPoint(p)
pd = v.vtkPolyData()
pd.SetPoints(pts)
# Create a IdFilter to preserve original point ids
idf = v.vtkIdFilter()
idf.SetIdsArrayName('origIds')
idf.PointIdsOn()
idf.SetInputData(pd)
# Create a 2D Delaunay triangulation
d2d = v.vtkDelaunay2D()
d2d.SetInputConnection(idf.GetOutputPort())
# Create mesh quality cell data array to filter out
# boundary triangles
mq = v.vtkMeshQuality()
mq.SetInputConnection(d2d.GetOutputPort())
mq.SetTriangleQualityMeasureToAspectRatio()
mq.SaveCellQualityOn()
mq.Update()
# Generate the polydata with mesh
plateTriPoly = mq.GetOutput()
plateTri = plateTriPoly.GetPolys()
# Map the connectivity to original point ids
newTriangles = v.vtkCellArray()
plateTri.InitTraversal()
triIds = v.vtkIdList()
origIds = plateTriPoly.GetPointData().GetArray('origIds')
aspectRatioArray = plateTriPoly.GetCellData().GetArray('Quality')
triangleIndex = 0
while plateTri.GetNextCell(triIds):
# Keep only the equilateral triangles to get rid of boundary triangles
aspectRatio = aspectRatioArray.GetTuple1(triangleIndex)
triangleIndex += 1
if aspectRatio < 1.5:
newTriangles.InsertNextCell(3)
for i in range(3):
newTriangles.InsertCellPoint(
int(origIds.GetTuple1(triIds.GetId(i))))
pd.SetPolys(newTriangles)
return pd
def meshPointCloud( inputVTKfile, searchRad ):
reader = v.vtkPolyDataReader()
reader.SetFileName( inputVTKfile )
reader.Update()
pd = reader.GetOutput()
N = pd.GetNumberOfPoints()
kdt = v.vtkKdTree()
kdt.BuildLocatorFromPoints( pd.GetPoints() )
polys = v.vtkCellArray()
for i in range( N ):
currPoint = pd.GetPoint(i)
idList = v.vtkIdList()
kdt.FindPointsWithinRadius( searchRad, currPoint, idList )
neighbors = []
for j in range( idList.GetNumberOfIds() ):
currId = idList.GetId(j)
if j != i:
neighbors.append(currId)
def makeConnectivityList(poly):
listOut = []
idf = v.vtkIdFilter()
idf.SetInputData(poly)
idf.SetIdsArrayName('OrigIds')
idf.PointIdsOn()
edgeExt = v.vtkExtractEdges()
edgeExt.SetInputConnection(idf.GetOutputPort())
edgeExt.Update()
edges = edgeExt.GetOutput()
origIds = edges.GetPointData().GetArray('OrigIds')
ids = v.vtkIdList()
cells = edges.GetLines()
cells.InitTraversal()
while cells.GetNextCell(ids):
connectivity = []
for i in range(ids.GetNumberOfIds()):
connectivity.append(int(origIds.GetTuple1(ids.GetId(i))))
listOut.append(connectivity)
return listOut
def extract_points(self, source):
# Travers the cells and add points while keeping their order.
points = source.GetPoints()
cells = source.GetLines()
cells.InitTraversal()
idList = vtk.vtkIdList()
pointIds = []
while cells.GetNextCell(idList):
for i in range(0, idList.GetNumberOfIds()):
pId = idList.GetId(i)
# Only add the point id if the previously added point does not
# have the same id. Avoid p->p duplications which occur for example
# if a poly-line is traversed. However, other types of point
# duplication currently are not avoided: a->b->c->a->d
if len(pointIds) == 0 or pointIds[-1] != pId:
pointIds.append(pId)
result = []
for i in pointIds:
result.append(points.GetPoint(i))
return result
def get_outlet_branches(self):
"""
Get list of branches connected to outlets
"""
# branch ids
br_id = self.get_point_data(self.PointDataFields.BRANCH)
bf_id = self.get_point_data(self.PointDataFields.BIFURCATION)
# global node id
gid = self.get_point_data(self.PointDataFields.NODEID)
# outlet points are only connected to one cell (skip inlet point)
ids = vtkIdList()
outlets = []
for p in range(self.centerline.GetNumberOfPoints()):
self.centerline.GetPointCells(p, ids)
if ids.GetNumberOfIds() == 1 and gid[p] != 0:
assert br_id[p] != -1, 'bifurcation ' + str(bf_id[p]) + ' is connected to an outlet'
outlets += [br_id[p]]
return outlets
def isCellWet(vtkSGrid2D, newPoint2D, cellID, IBC_2D):
pcoords = [0.0,0.0,0.0]
weights = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
clspoint = [0.,0.,0.]
tmpid = vtk.mutable(0)
vtkid2 = vtk.mutable(0)
vtkcell2D = vtk.vtkQuad()
vtkcell2D = vtkSGrid2D.GetCell(cellID)
tmpres = vtkcell2D.EvaluatePosition(newPoint2D,clspoint,tmpid,pcoords,vtkid2, weights )
idlist1 = vtk.vtkIdList()
numpts = vtkcell2D.GetNumberOfPoints()
idlist1 = vtkcell2D.GetPointIds()
tmpIBC = 0.0
for x in range(0,numpts):
tmpIBC = tmpIBC + weights[x]*abs(IBC_2D.GetTuple(idlist1.GetId(x))[0])
# print(tmpIBC,abs(IBC_2D.GetTuple(idlist1.GetId(x))[0]))
if tmpIBC >= .9999999:
return True
else:
return False
def vtk_to_mat(polydata, path):
num_points = polydata.GetNumberOfPoints()
sps_acc = sps.coo_matrix((num_points, num_points))
data = []
row_indices = []
column_indices = []
lines = polydata.GetLines()
vtk_data = polydata.GetCellData().GetScalars()
print "np: ", num_points
for idx in range(lines.GetNumberOfCells()):
points = vtk.vtkIdList()
lines.GetCell(idx, points)
if points.GetNumberOfIds() == 2:
row_indices.append(points.GetId(0))
column_indices.append(points.GetId(1))
data.append(vtk_data.GetTuple1(idx))
sps_acc = sps_acc + sps.coo_matrix((data, (row_indices, column_indices)), shape=(num_points, num_points))
savemat(path, {'skeleton': sps_acc})
def drawCells(self, cellIdList, color):
triangles = vtk.vtkCellArray()
pointslist = vtk.vtkIdList()
fullPoints = self.mesh.GetPoints()
partPoints = vtk.vtkPoints()
for i in range(cellIdList.GetNumberOfIds()):
cell = cellIdList.GetId(i)
triangle = self.mesh.GetCell(cell)
triangles.InsertNextCell(triangle)
self.mesh.GetCellPoints(cell, pointslist)
partPoints.InsertPoints(pointslist, pointslist, fullPoints)
trianglePoly = vtk.vtkPolyData()
trianglePoly.SetPoints(partPoints)
trianglePoly.SetPolys(triangles)
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(trianglePoly)
self.addActor(mapper, color)
def search(self, points, radius=None):
"""
Get ids of points in geometry closest to input points
Args:
points: list of points to be searched
radius: optional, search radius
Returns:
Id list
"""
ids = []
for p in points:
if radius is not None:
result = vtk.vtkIdList()
self.locator.FindPointsWithinRadius(radius, p, result)
ids += [
result.GetId(k) for k in range(result.GetNumberOfIds())
]
else:
ids += [self.locator.FindClosestPoint(p)]
return ids
def _rbe2(elem, cell_type, ugrid, nid_dict):
independent = elem.gn
dependent = elem.Gmi
nids = []
for i in range(len(dependent)):
nids.append(nid_dict[independent])
nids.append(nid_dict[dependent[i]])
ids = vtk.vtkIdList()
ids.SetNumberOfIds(len(nids))
for i in range(len(nids)):
ids.SetId(i, nids[i])
ugrid.InsertNextCell(cell_type, ids)
return elem.eid
def PopulateFromVtkData(self, inInputCsData, globalCellIdArray, quadIndex):
self.index = quadIndex
cellPointIds = vtk.vtkIdList()
inInputCsData.GetCellPoints(quadIndex, cellPointIds)
numids = cellPointIds.GetNumberOfIds()
if numids != 4:
myDebugPrint3AndException(
"GetQuadClosestToPointsInBlock2Params: not a quad")
inInputCsData.GetPoint(cellPointIds.GetId(0), self.ptA)
inInputCsData.GetPoint(cellPointIds.GetId(1), self.ptB)
inInputCsData.GetPoint(cellPointIds.GetId(2), self.ptC)
inInputCsData.GetPoint(cellPointIds.GetId(3), self.ptD)
self.ptAverage[0] = (self.ptA[0] + self.ptB[0] + self.ptC[0] +
self.ptD[0]) * 0.25
self.ptAverage[1] = (self.ptA[1] + self.ptB[1] + self.ptC[1] +
self.ptD[1]) * 0.25
self.ptAverage[2] = (self.ptA[2] + self.ptB[2] + self.ptC[2] +
self.ptD[2]) * 0.25
if globalCellIdArray != None:
self.cellId = globalCellIdArray.GetValue(quadIndex)
def cacheState(self):
self.clearCachedState()
self.cachedState = []
#clone nodes
children = vtk.vtkIdList()
shNode = slicer.vtkMRMLSubjectHierarchyNode.GetSubjectHierarchyNode(
slicer.mrmlScene)
shNode.GetItemChildren(
self.folder, children
) # Add a third argument with value True for recursive query
state = []
for i in range(children.GetNumberOfIds()):
child = children.GetId(i)
childNode = shNode.GetItemDataNode(child)
if not self.isNodeCurrent(childNode):
continue
clonedChild = self.cloneNode(childNode)
self.archiveNode(clonedChild)
self.cachedState.append(clonedChild)
def VtkCargaMalla(recordGrid):
kpoints = vtk.vtkPoints()
# Definimos grid
recordGrid.uGrid.SetPoints(kpoints)
setToDraw = recordGrid.xcSet
setToDraw.numerate()
pnts = setToDraw.getPoints
for p in pnts:
kpoints.InsertPoint(p.getIdx, p.getPos.x, p.getPos.y, p.getPos.z)
cellSet = setToDraw.getLines # cells are lines as default.
if (recordGrid.cellType == "faces"):
cellSet = setToDraw.getSurfaces
elif (recordGrid.cellType == "bodies"):
cellSet = setToDraw.getBodies
for c in cellSet:
vertices = xc_base.vector_int_to_py_list(c.getIdxVertices)
vtx = vtk.vtkIdList()
for vIndex in vertices:
vtx.InsertNextId(vIndex)
recordGrid.uGrid.InsertNextCell(c.getVtkCellType, vtx)
def draw_faces(self):
faces = vtkCellArray()
for face in self.data['faces']:
vil = vtkIdList()
for pt in face['vertices']:
vil.InsertNextId(pt)
faces.InsertNextCell(vil)
color = face.get('color', [150, 255, 150])
try:
self.colors.InsertNextTypedTuple(color)
except Exception:
self.colors.InsertNextTupleValue(color)
self.polydata.SetPolys(faces)
self.main.window.Render()
