Cannot show Volume on Plotter in qtwindow
See original GitHub issueI am following the code given in the examples but i could not get the volume view in qtwindow. I get a blank screen when i try to show Volume derived from ndarray but works fine on predefined shapes.
import sys
from PyQt5 import Qt
import numpy as np
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
from vtkplotter import Plotter, Volume, Cube, Sphere
class MainWindow(Qt.QMainWindow):
def __init__(self, parent=None):
Qt.QMainWindow.__init__(self, parent)
self.frame = Qt.QFrame()
self.vl = Qt.QVBoxLayout()
self.vtkWidget = QVTKRenderWindowInteractor(self.frame)
self.vl.addWidget(self.vtkWidget)
vp = Plotter(qtWidget=self.vtkWidget, bg='black')
c = Cube(side=30)
s = Sphere(r=15)
X, Y, Z = np.mgrid[:30, :30, :30]
scalar_field = ((X-15)**2 + (Y-15)**2 + (Z-15)**2)/225
vol = Volume(scalar_field)
vol.alpha([0, 0, 0.4, 0.9, 0.9])
# vp.show(c)
# vp.show(s)
vp.show(vol)
self.frame.setLayout(self.vl)
self.setCentralWidget(self.frame)
self.show() # <--- show the Qt Window
def onClose(self):
print("Disable the interactor before closing to prevent it from trying to act on a already deleted items")
self.vtkWidget.close()
if __name__ == "__main__":
app = Qt.QApplication(sys.argv)
window = MainWindow()
app.aboutToQuit.connect(window.onClose) # <-- connect the onClose event
app.exec_()
The same Volume can be rendered without Plotter
import numpy as np
from vtkplotter import Volume
def main():
X, Y, Z = np.mgrid[:30, :30, :30]
scalar_field = ((X-15)**2 + (Y-15)**2 + (Z-15)**2)/225
vol = Volume(scalar_field)
vol.alpha([0, 0, 0.4, 0.9, 0.9])
vol.show(bg="black")
if __name__ == '__main__':
main()
Issue Analytics
- State:
- Created 4 years ago
- Comments:8 (4 by maintainers)
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Thanks @pasha009 ! I will add a comment in the example.
This workaround is functioning for me. But no idea why. Just added
before any vtk imports