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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtkmeshviewer2.py,v $
## Language: Python
## Date: $Date: 2006/05/26 12:35:13 $
## Version: $Revision: 1.9 $
## Copyright (c) Luca Antiga, David Steinman. All rights reserved.
## See LICENCE file for details.
## This software is distributed WITHOUT ANY WARRANTY; without even
## the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
## PURPOSE. See the above copyright notices for more information.
## Note: this class was contributed by
## Tangui Morvan
## Kalkulo AS
## Simula Research Laboratory
## This class is a slightly modified version of vmtkmeshviewer
## which allows for per-cell array visualization, mesh clipping
## and thresholding based on array values.
import vtk
import sys
import vmtkrenderer
import pypes
vmtkmeshviewer2 = 'vmtkMeshViewer2'
class vmtkMeshViewer2(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Mesh = None
self.vmtkRenderer = None
self.OwnRenderer = 0
self.Display = 1
self.Opacity = 1.0
self.ArrayName = ''
self.ScalarRange = [0.0, 0.0]
self.Legend = 0
self.Grayscale = 0
self.FlatInterpolation = 0
self.DisplayCellData = 0
self.Color = [-1.0, -1.0, -1.0]
self.Threshold = float('-Inf')
self.ThresholdUpper = True
self.DoThreshold = False
self.ThresholdedMesh = None
self.InitialMesh = None
self.PlaneWidget = None
self.InteractiveClip = False
self.ClipExtract = False
self.InsideOut = False
self.ObserverId = -1
self.Actor = None
self.ScalarBarActor = None
self.SetScriptName('vmtkmeshviewer')
self.SetScriptDoc('display a mesh')
self.SetInputMembers([
['Mesh','i','vtkUnstructuredGrid',1,'','the input mesh','vmtkmeshreader'],
['vmtkRenderer','renderer','vmtkRenderer',1,'','external renderer'],
['Display','display','bool',1,'','toggle rendering'],
['Opacity','opacity','float',1,'(0.0,1.0)','object opacity in the scene'],
['ArrayName','array','str',1,'','name of the array where the scalars to be displayed are stored'],
['ScalarRange','scalarrange','float',2,'','range of the scalar map'],
['Legend','legend','bool',1,'','toggle scalar bar'],
['Grayscale','grayscale','bool',1,'','toggle color or grayscale'],
['FlatInterpolation','flat','bool',1,'','toggle flat or shaded surface display'],
['DisplayCellData','celldata','bool',1,'','toggle display of point or cell data'],
['Color','color','float',3,'','RGB color of the object in the scene'],
['Threshold','threshold','float',1,'','threshold to apply to the array when pressing t'],
])
self.SetOutputMembers([
['Mesh','o','vtkUnstructuredGrid',1,'','the output mesh','vmtkmeshwriter']
])
def ClipMesh(self):
meshClipFilter = vtk.vtkClipDataSet()
meshClipFilter.SetInput(self.Mesh)
meshClipFilter.SetInsideOut(self.InsideOut)
clipPlane = vtk.vtkPlane()
self.PlaneWidget.GetPlane(clipPlane)
meshClipFilter.SetClipFunction(clipPlane)
meshClipFilter.Update()
return meshClipFilter.GetOutput()
def ExtractMesh(self):
meshExtractFilter = vtk.vtkExtractGeometry()
meshExtractFilter.SetInput(self.Mesh)
meshExtractFilter.SetExtractInside(self.InsideOut)
clipPlane = vtk.vtkPlane()
self.PlaneWidget.GetPlane(clipPlane)
meshExtractFilter.SetImplicitFunction(clipPlane)
meshExtractFilter.Update()
return meshExtractFilter.GetOutput()
def ThresholdMesh(self):
thresholder = vtk.vtkThreshold()
thresholder.SetInput(self.InitialMesh)
if (self.ThresholdUpper):
thresholder.ThresholdByUpper(self.Threshold)
else:
thresholder.ThresholdByLower(self.Threshold)
thresholder.SetInputArrayToProcess(0,0,0,1,self.ArrayName)
thresholder.Update()
self.Mesh = thresholder.GetOutput()
def PlaneCallback(self,widget,event_string):
if self.ClipExtract:
self.Actor.GetMapper().SetInput(self.ExtractMesh())
else:
self.Actor.GetMapper().SetInput(self.ClipMesh())
def InteractCallback(self,obj):
if self.BoxWidget.GetEnabled() == 1:
self.BoxWidget.SetEnabled(0)
else:
self.BoxWidget.SetEnabled(1)
def ClipCallback(self,obj):
if self.Mesh != None:
self.ClipExtract = False
if self.PlaneWidget.GetEnabled():
self.Actor.GetMapper().SetInput(self.ClipMesh())
else:
self.Actor.GetMapper().SetInput(self.Mesh)
self.vmtkRenderer.RenderWindow.Render()
def ExtractCallback(self,obj):
if self.Mesh:
self.ClipExtract = True
if self.PlaneWidget.GetEnabled():
self.Actor.GetMapper().SetInput(self.ExtractMesh())
else:
self.Actor.GetMapper().SetInput(self.Mesh)
self.vmtkRenderer.RenderWindow.Render()
def NCallback(self,obj):
if self.Actor.GetMapper() != None:
self.InteractiveClip = not self.InteractiveClip
if self.InteractiveClip:
self.ObserverId = self.PlaneWidget.AddObserver("InteractionEvent",self.PlaneCallback)
self.PlaneWidget.On()
self.PlaneWidget.InvokeEvent('InteractionEvent')
elif self.ObserverId != -1:
self.PlaneWidget.RemoveObserver(self.ObserverId)
self.ObserverId = -1
self.PlaneWidget.Off()
self.Actor.GetMapper().SetInput(self.Mesh)
self.vmtkRenderer.RenderWindow.Render()
def DCallback(self,obj):
if self.PlaneWidget.GetEnabled():
self.InsideOut = not self.InsideOut
self.PlaneWidget.InvokeEvent('InteractionEvent')
self.vmtkRenderer.RenderWindow.Render()
def TCallback(self,obj):
if self.Mesh and self.ArrayName != '':
#has the mesh been clipped?
isClipped = (self.Actor.GetMapper().GetInput() != self.Mesh)
self.DoThreshold = not self.DoThreshold
if self.DoThreshold:
self.ThresholdMesh()
else:
self.Mesh = self.InitialMesh
#Redo the clipping if the mesh was clipped
if isClipped:
if self.ClipExtract:
self.Actor.GetMapper().SetInput(self.ExtractMesh())
else:
self.Actor.GetMapper().SetInput(self.ClipMesh())
else:
self.Actor.GetMapper().SetInput(self.Mesh)
self.vmtkRenderer.RenderWindow.Render()
def UndoCallback(self,obj):
self.ThresholdUpper = not self.ThresholdUpper
if self.DoThreshold:
isClipped = (self.Actor.GetMapper().GetInput() != self.Mesh)
self.ThresholdMesh()
if isClipped:
if self.ClipExtract:
self.Actor.GetMapper().SetInput(self.ExtractMesh())
else:
self.Actor.GetMapper().SetInput(self.ClipMesh())
else:
self.Actor.GetMapper().SetInput(self.Mesh)
self.vmtkRenderer.RenderWindow.Render()
def BuildView(self):
if not self.vmtkRenderer:
self.vmtkRenderer = vmtkrenderer.vmtkRenderer()
self.vmtkRenderer.Initialize()
self.OwnRenderer = 1
if self.Actor != None:
self.vmtkRenderer.Renderer.RemoveActor(self.Actor)
if self.ScalarBarActor != None:
self.vmtkRenderer.Renderer.RemoveActor(self.ScalarBarActor)
if self.Mesh != None:
self.InitialMesh = self.Mesh
self.DisplayMesh = self.Mesh
mapper = vtk.vtkDataSetMapper()
mapper.SetInput(self.DisplayMesh)
array = None
if (self.ArrayName != ''):
if self.DisplayCellData == 0:
self.Mesh.GetPointData().SetActiveScalars(self.ArrayName)
array = self.Mesh.GetPointData().GetScalars()
else:
self.Mesh.GetCellData().SetActiveScalars(self.ArrayName)
array = self.Mesh.GetCellData().GetScalars()
mapper.SetScalarModeToUseCellData()
if (array != None):
if (self.ScalarRange[1] > self.ScalarRange[0]):
mapper.SetScalarRange(self.ScalarRange)
else:
mapper.SetScalarRange(array.GetRange(0))
if (self.Grayscale == 1):
lut = vtk.vtkLookupTable()
lut.SetValueRange(0.0,1.0)
lut.SetSaturationRange(0.0,0.0)
mapper.SetLookupTable(lut)
self.Actor = vtk.vtkActor()
self.Actor.SetMapper(mapper)
if (self.Color[0] >= 0.0):
self.Actor.GetProperty().SetColor(self.Color)
if (self.FlatInterpolation == 1):
self.Actor.GetProperty().SetInterpolationToFlat()
self.Actor.GetProperty().SetOpacity(self.Opacity)
self.vmtkRenderer.Renderer.AddActor(self.Actor)
if (self.Legend == 1) & (self.Actor != None):
self.ScalarBarActor = vtk.vtkScalarBarActor()
self.ScalarBarActor.SetLookupTable(self.Actor.GetMapper().GetLookupTable())
self.ScalarBarActor.GetLabelTextProperty().ItalicOff()
self.ScalarBarActor.GetLabelTextProperty().BoldOff()
self.ScalarBarActor.GetLabelTextProperty().ShadowOff()
## self.ScalarBarActor.GetLabelTextProperty().SetColor(0.0,0.0,0.0)
self.ScalarBarActor.SetLabelFormat('%.2f')
self.vmtkRenderer.Renderer.AddActor(self.ScalarBarActor)
#self.vmtkRenderer.RenderWindowInteractor.AddObserver("KeyPressEvent", self.KeyPressed)
self.vmtkRenderer.AddKeyBinding('i','Interact.',self.InteractCallback)
self.vmtkRenderer.AddKeyBinding('c','Clip.',self.ClipCallback)
self.vmtkRenderer.AddKeyBinding('e','Extract.',self.ExtractCallback)
self.vmtkRenderer.AddKeyBinding('n','Show clipped area.',self.NCallback)
self.vmtkRenderer.AddKeyBinding('d','Switch clipped/unclipped area.',self.DCallback)
self.vmtkRenderer.AddKeyBinding('t','Redo.',self.TCallback)
self.vmtkRenderer.AddKeyBinding('u','Undo.',self.UndoCallback)
self.PlaneWidget = vtk.vtkImplicitPlaneWidget()
self.PlaneWidget.SetInteractor(self.vmtkRenderer.RenderWindowInteractor)
self.PlaneWidget.SetPlaceFactor(1.25)
self.PlaneWidget.DrawPlaneOff()
self.PlaneWidget.SetProp3D(self.Actor)
self.PlaneWidget.PlaceWidget()
#Work around bug/strange behaviour in vtk
self.PlaneWidget.SetOrigin(self.Actor.GetCenter())
if (self.Display == 1):
self.vmtkRenderer.Render()
self.Mesh = self.InitialMesh
if self.OwnRenderer:
self.vmtkRenderer.Deallocate()
def Execute(self):
if (self.Mesh == None) & (self.Display == 1):
self.PrintError('Error: no Mesh.')
self.BuildView()
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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