Какво съм направил:
Създайте приложение с PyQt5 и VTK, добавям 2 VTK рендиране в 2 QTWidget.
Във всеки рендер на VTK чета .stl файл и го показвам.
Добавям функция screen_shot, тя може да изобрази VTK екранна снимка и да запази тези снимки.
Добавям лента с менюта, мога да щракна върху лента с менюта и VTK рендиране на екранна снимка.
Какво искам да направя:
Искам да изпълня screen_shot след зареждане на VTK рендиране, записвам го в def __init__. Но по този начин получавам само снимка 100 * 30 (всъщност 900 * 900). Когато щракна върху менюто, ще получа снимка 900 * 900.
Може би моето описание отвъд разбирането, това е моят код:
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
QtWidgets.QMainWindow.__init__(self, parent)
self.workspace = ""
self.data_path = ""
self.data_index = 0
self.bkcolor = (1.0, 1.0, 1.0)
self.frame = QtWidgets.QFrame()
self.setWindowTitle("PythonVTKViewer")
# self.frame.setLayout(self.box)
self.stl_interactor = QtWidgets.QHBoxLayout()
self.init_menubar()
self.showMaximized()
self.load_Interactor()
self.shot_screen()
def init_menubar(self):
# init a menubar
menubar = self.menuBar()
fileMenu = menubar.addMenu('&Function')
self.screen_shot_button = QtWidgets.QAction('ScreenShot', self)
self.screen_shot_button.setShortcut('Ctrl+S')
self.screen_shot_button.setStatusTip('ScreenShot')
self.screen_shot_button.triggered.connect(self.shot_screen)
fileMenu.addAction(self.screen_shot_button)
def load_Interactor(self):
# Create two render windows
self.vtkWidget_left = QVTKRenderWindowInteractor(self.frame)
self.vtkWidget_right = QVTKRenderWindowInteractor(self.frame)
self.stl_interactor.addWidget(self.vtkWidget_left)
self.stl_interactor.addWidget(self.vtkWidget_right)
# Left renderer and right renderer
self.ren_left = vtk.vtkRenderer()
self.vtkWidget_left.GetRenderWindow().AddRenderer(self.ren_left)
self.renWinLeft = self.vtkWidget_left.GetRenderWindow()
self.iren_left = self.renWinLeft.GetInteractor()
self.ren_right = vtk.vtkRenderer()
self.vtkWidget_right.GetRenderWindow().AddRenderer(self.ren_right)
self.iren_right = self.vtkWidget_right.GetRenderWindow().GetInteractor()
# read stl file
upper_path = os.path.join(self.workspace, "stl/scanner/start/UpperTeeth.stl")
lower_path = os.path.join(self.workspace, "stl/scanner/start/LowerTeeth.stl")
self.init_stl("./temp/upperteeth.stl")
self.init_stl("./temp/lowerteeth.stl")
self.frame.setLayout(self.stl_interactor)
self.setCentralWidget(self.frame)
self.ren_left.SetBackground(self.bkcolor[0], self.bkcolor[1], self.bkcolor[2])
self.ren_right.SetBackground(self.bkcolor[0], self.bkcolor[1], self.bkcolor[2])
# adjust camera
self.init_camera()
self.iren_left.Initialize()
self.iren_right.Initialize()
def init_stl(self, file):
# reader = Reader.read_data(file)
reader = vtk.vtkSTLReader()
if "upper" in file or "Upper" in file:
reader.SetFileName(file)
reader.Update()
self.mapper_left = vtk.vtkPolyDataMapper()
self.mapper_left.SetInputConnection(reader.GetOutputPort())
self.actor_left = vtk.vtkActor()
self.actor_left.SetMapper(self.mapper_left)
self.ren_left.AddActor(self.actor_left)
else:
reader.SetFileName(file)
reader.Update()
self.mapper_right = vtk.vtkPolyDataMapper()
self.mapper_right.SetInputConnection(reader.GetOutputPort())
self.actor_right = vtk.vtkActor()
self.actor_right.SetMapper(self.mapper_right)
self.ren_right.AddActor(self.actor_right)
def init_camera(self):
self.ren_left.GetActiveCamera().SetFocalPoint(0, 0, 0)
self.ren_left.GetActiveCamera().SetPosition(0, 0, -150)
self.ren_left.GetActiveCamera().Roll(90)
self.ren_left.GetActiveCamera().ParallelProjectionOn()
self.ren_left.GetActiveCamera().SetParallelScale(40)
self.ren_right.GetActiveCamera().SetFocalPoint(0, 0, 0)
self.ren_right.GetActiveCamera().SetPosition(0, 0, 150)
self.ren_right.GetActiveCamera().Roll(270)
self.ren_right.GetActiveCamera().ParallelProjectionOn()
self.ren_right.GetActiveCamera().SetParallelScale(40)
def shot_screen(self):
if os.path.exists("./temp/input/upper.png"): os.remove("./temp/input/upper.png")
elif os.path.exists("./temp/input/lower.png"): os.remove("./temp/input/lower.png")
filter = vtk.vtkRenderLargeImage()
filter.SetMagnification(1)
filter.SetInput(self.ren_left)
writer = vtk.vtkPNGWriter()
writer.SetFileName("./temp/input/upper.png")
writer.SetInputConnection(filter.GetOutputPort())
writer.Write()
filter = vtk.vtkRenderLargeImage()
filter.SetMagnification(1)
filter.SetInput(self.ren_right)
writer = vtk.vtkPNGWriter()
writer.SetFileName("./temp/input/lower.png")
writer.SetInputConnection(filter.GetOutputPort())
writer.Write()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
window = MainWindow()
sys.exit(app.exec_())
Как да направя екранна снимка в def __init__? Трябва ли да изпълня тази функция?