Hi,
I declared a vtkActor and set it to one colour. I pass a vtkBooleanOperationPolyDataFilter to the vtkPolyDataMapper and then to the vtkActor. When the vtkActor is rendered, it is not the colour I specified. Instead, it is blue and progressively transitions to red. How do I make it one colour?
Thanks. Any help would be greatly appreciated.
Set ScalarVisibilityOff on your mapper.
Thanks so much! One more question, when I try to render a vtkBooleanOperatonPolyDataFilter using vtkMapper and vtkActor, the render fails and I am given this error:
Segmentation fault (core dumped)
Do you know what this means and how to fix it? Thanks!
It’s hard to tell without seeing the code. Can you supply an example that illustrates the problem?
I have problems with lines 218 and 219. RemoveAllInputs() did not remove the data in port 0 and 1 of vtkBooleanOperationPolyDataFilter. It only removed data in port 0. So I tried to remove data for each port using RemoveAllInputConnections(portNumber) for port 0 and 1. This does the job. I get 0 inputs for both ports. The purpose of the code is to merge multiple volumes created by vtkDelaunay and display them. I get this error:
ERROR: In /work/standalone-x64-build/VTK-source/Filters/General/vtkOBBTree.cxx, line 1058
vtkOBBTree (0x801dfa0): Can’t build OBB tree - no data available!
I don’t know what is wrong and how to fix it. Thanks so much by the way!
code.txt (4.4 KB)
Please post your code and a CMakelist file.
171 orderedContourDict = OrderedDict(sorted(self.reslicers[self.contourOrientation].contours.items()))
172 contourList = []
173 for slice, contour in orderedContourDict.items():
174 contourList.append(contour)
175
176 numberOfContours = len(orderedContourDict)
177 volumePolyDataList = []
178 for i in range(0, numberOfContours - 1):
179 appendPolyData = vtkAppendPolyData()
180 appendPolyData.AddInputData(contourList[i].GetContourRepresentation().GetContourRepresentationAsPolyData())
181 appendPolyData.AddInputData(contourList[i + 1].GetContourRepresentation().GetContourRepresentationAsPolyData())
182 appendPolyData.Update()
183 delaunay = vtkDelaunay3D()
184 delaunay.SetInputData(appendPolyData.GetOutput())
185 surfaceFilter = vtkDataSetSurfaceFilter()
186 surfaceFilter.SetInputConnection(0, delaunay.GetOutputPort())
187 surfaceFilter.Update()
188 polyData = surfaceFilter.GetOutput()
189 volumePolyDataList.append(polyData)
190
191 if len(volumePolyDataList) == 1:
192 delaunay = vtkDelaunay3D()
193 delaunay.SetInputData(volumePolyDataList[0])
194 delaunayMapper = vtkDataSetMapper()
195 delaunayMapper.SetInputConnection(delaunay.GetOutputPort())
196 self.actor.SetMapper(delaunayMapper)
197 self.planes.GetRenderWindow().Render()
198 else:
199 booleanOperation = vtkBooleanOperationPolyDataFilter()
200 booleanOperation1 = vtkBooleanOperationPolyDataFilter()
201 booleanOperation.SetOperationToUnion()
202 booleanOperation1.SetOperationToUnion()
203
204 for i in range(0, len(volumePolyDataList)):
205 if i == 0:
206 booleanOperation.AddInputData(0, volumePolyDataList[i])
207 #booleanOperation.Update()
208 elif i == 1:
209 booleanOperation.AddInputData(1, volumePolyDataList[i])
210 #booleanOperation.Update()
211 elif i == 2:
212 booleanOperation1.AddInputData(0, booleanOperation.GetOutput())
213 booleanOperation1.AddInputData(1, volumePolyDataList[i])
214 #booleanOperation1.Update()
215 else:
216 boolCopy = booleanOperation1.GetOutput()
217 # booleanOperation1.RemoveAllInputs()
218 booleanOperation1.RemoveAllInputConnections(0)
219 booleanOperation1.RemoveAllInputConnections(1)
220 # booleanOperation1.Update()
221 print(booleanOperation.GetNumberOfInputConnections(0), booleanOperation.GetNumberOfInputConnections(1), booleanOpera tion1.GetNumberOfInputConnections(0), booleanOperation1.GetNumberOfInputConnections(1))
222 booleanOperation1.AddInputData(0, boolCopy)
223 booleanOperation1.AddInputData(1, volumePolyDataList[i])
224 #booleanOperation1.Update()
225
226 print(booleanOperation.GetNumberOfInputConnections(0), booleanOperation.GetNumberOfInputConnections(1), booleanOperation1.Ge tNumberOfInputConnections(0), booleanOperation1.GetNumberOfInputConnections(1))
227
228 # print(booleanOperation.GetNumberOfInputConnections(0), booleanOperation.GetNumberOfInputConnections(1), booleanOperatio n1.GetNumberOfInputConnections(0), booleanOperation1.GetNumberOfInputConnections(1))
229
230 mapper = vtkPolyDataMapper()
231 if len(volumePolyDataList) == 2:
232 mapper.SetInputConnection(booleanOperation.GetOutputPort())
233 else:
234 mapper.SetInputConnection(booleanOperation1.GetOutputPort())
235 mapper.ScalarVisibilityOff()
236 self.actor.SetMapper(mapper)
237 self.planes.GetRenderWindow().Render()
238
239 self.reslicers[self.contourOrientation].stopContouring()
240 self.contouring = False
241 self.orientationBox.setEnabled(True)
242 self.startContouringButton.setEnabled(True)
243 self.generateVolumeButton.setEnabled(False)
244 self.cancelContouringButton.setEnabled(False)
245 self.applyButton.setEnabled(True)