PROSAGA码农传奇-模型可视化-在PyQt中，VTK渲染无法正常工作

<div class =“post-text”itemprop =“text”>
  <P>
    正如我在评论中所写，我无法在MacOS 10.11.6上重现VTK 8.1的问题。如果您运行的是旧版本，请考虑升级。
  </p>
  <P>
    下面是另一个例子
     <code>
      QVTKRenderWindowInteractor
    </code>
     小部件嵌入在
     <code>
      QMainWindow
    </code>
    。问题是否仍然存在？
  </p>
  <P>
    如果是，请比较输出
     <code>
      print(self.ren)
    </code>
     我附在下面。我会报告这个
    <a href="https://gitlab.kitware.com/vtk/vtk/issues" rel="nofollow noreferrer">
      vtk问题跟踪器
    </A>
    。
  </p>
   <pre>
    <code>
      #!/usr/bin/env python
import sys
import vtk
from PyQt5 import QtWidgets
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
from vtk.util.colors import tomato

class MainWindow(QtWidgets.QMainWindow):

def __init__(self, parent = None):
        super(MainWindow, self,).__init__(parent)

self.frame = QtWidgets.QFrame()
        self.vl = QtWidgets.QVBoxLayout()
        self.vtkWidget = QVTKRenderWindowInteractor(self.frame)
        self.vl.addWidget(self.vtkWidget)
        self.ren = vtk.vtkRenderer()
        self.ren.SetBackground(0.5,0.5,0.5)
        self.vtkWidget.GetRenderWindow().AddRenderer(self.ren)
        self.iren = self.vtkWidget.GetRenderWindow().GetInteractor()

source = vtk.vtkConeSource()
        source.SetResolution(8)
        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(source.GetOutputPort())
        actor = vtk.vtkActor()
        actor.SetMapper(mapper)
        actor.GetProperty().SetColor(tomato)
        actor.RotateX(30.0)
        actor.RotateY(-45.0)

self.ren.AddActor(actor)
        self.ren.SetBackground(0.1, 0.2, 0.4)
        self.ren.ResetCamera()
        self.ren.GetActiveCamera().Zoom(1.5)
        self.frame.setLayout(self.vl)
        self.setCentralWidget(self.frame)

# Print the renderer.
        print(self.ren)

self.show()
        self.iren.Initialize()

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = MainWindow()
    sys.exit(app.exec_())

</code>
  </pre>
  <P>
    控制台输出：
  </p>
   <pre>
    <code>
      vtkOpenGLRenderer (0x7ff4c3d8a5f0)
  Debug: Off
  Modified Time: 1159
  Reference Count: 2
  Registered Events: (none)
  Aspect: (1, 1)
  PixelAspect: (1, 1)
  Background: (0.1, 0.2, 0.4)
  Background2: (0.2, 0.2, 0.2)
  BackgroundAlpha: 0
  GradientBackground: Off
  Viewport: (0, 0, 1, 1)
  Displaypoint: (0, 0, 0)
  Viewpoint: (0, 0, 0)
  Worldpoint: (0, 0, 0, 0)
  Pick Position X1 Y1: -1 -1
  Pick Position X2 Y2: -1 -1
  IsPicking boolean: 0
  Props:
    Debug: Off
    Modified Time: 923
    Reference Count: 1
    Registered Events: (none)
    Number Of Items: 1
  PickResultProps:
  nullptr
  Near Clipping Plane Tolerance: 0.001
  ClippingRangeExpansion: 0.5
  Ambient: (1, 1, 1)
  Backing Store: Off
  Display Point: (0, 0, 0)
  Lights:
    Debug: Off
    Modified Time: 806
    Reference Count: 1
    Registered Events: (none)
    Number Of Items: 0
  Light Follow Camera: On
  View Point: (0, 0, 0)
  Two Sided Lighting: On
  Automatic Light Creation: On
  Layer = 0
  PreserveDepthBuffer: Off
  PreserveColorBuffer: Off
  Interactive = On
  Allocated Render Time: 10000
  Last Time To Render (Seconds): -1
  TimeFactor: 1
  Erase: On
  Draw: On
  UseDepthPeeling: Off
  OcclusionRation: 0
  MaximumNumberOfPeels: 4
  LastRenderingUsedDepthPeeling: Off
  Delegate:null
  Selector: 0x0
  TexturedBackground: Off
  BackgroundTexture:null
  Pass:null
  PickedId0
  NumPicked0
  PickedZ 0

</code>
  </pre>
</DIV>