如何在python vtk中连接两个单独的设置位置值?

Question

我设置了两个独立的滑块，用于在X方向和Y方向上移动它。为了连接滑块值和位置，我编写了下面的代码

#First STL file
reader = vtk.vtkSTLReader()
reader.SetFileName(filename)
self.transform = vtk.vtkTransform()
self.transform.Scale(1, 1, 1)

self.transformFilter = vtk.vtkTransformPolyDataFilter()
self.transformFilter.SetTransform(self.transform)
self.transformFilter.SetInputConnection(reader.GetOutputPort())
self.transformFilter.Update()
mapper = vtk.vtkPolyDataMapper()
if vtk.VTK_MAJOR_VERSION <= 5:
mapper.SetInput(self.transformFilter.GetOutput())
else:
mapper.SetInputConnection(self.transformFilter.GetOutputPort())

self.actor = vtk.vtkActor()

self.vtkwidget = QVTKRenderWindowInteractor(self.centralwidget)
self.gridLayout.addWidget(self.vtkwidget, 0, 0, 1, 1)
self.ren = vtk.vtkRenderer()
self.vtkwidget.GetRenderWindow().AddRenderer(self.ren)
self.iren = self.vtkwidget.GetRenderWindow().GetInteractor()
self.actor.SetMapper(mapper)
self.ren.AddActor(self.actor)
self.iren.Start()

self.horizontalSlider = QtWidgets.QSlider(self.centralwidget)
self.horizontalSlider.setGeometry(QtCore.QRect(70, 360, 291, 22))
self.horizontalSlider.setMinimum(-100)
self.horizontalSlider.setMaximum(100)
self.horizontalSlider.setProperty("value", 0)
self.horizontalSlider.setSliderPosition(0)
self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal)
self.horizontalSlider.valueChanged.connect(self.handler)

self.horizontalSlider_2 = QtWidgets.QSlider(self.centralwidget)
self.horizontalSlider_2.setGeometry(QtCore.QRect(70, 410, 291, 22))
self.horizontalSlider_2.setMinimum(-100)
self.horizontalSlider_2.setMaximum(100)
self.horizontalSlider_2.setProperty("value", 0)
self.horizontalSlider_2.setSliderPosition(0)
self.horizontalSlider_2.setOrientation(QtCore.Qt.Horizontal)
self.horizontalSlider_2.valueChanged.connect(self.handler2)
def handler(self, value):
self.positionx = value
self.actor.SetPosition(value, 0, 0)
self.iren.GetRenderWindow().Render()
def handler2(self, value2):
self.positiony = value2
self.actor.SetPosition(0, value2, 0)
self.iren.GetRenderWindow().Render()

但是正如你所看到的，当我改变一个方向(例如X)时，之前所有应用的方向(Y或Z)都被删除，并且stl文件开始从开始位置(0,0,0)移动。

是否有办法合并这两个滑块输出一起工作?

或者将两个处理程序合并为一个?

Answer 1

self.actor.SetPosition(value, 0, 0)是你的问题:你显式地将y和z坐标设置为0!

应该使用y和z的当前位置:

pos = self.actor.GetPosition()
self.actor.SetPosition(value, pos[1], pos[2])

第二个处理程序也是如此。