Question

-----更新和解决方案-------

除非

renderwindow.Render（）

在

中调用

UpdateData（）

功能行为仍然不稳定。因此，渲染窗口也需要更新。

我正在尝试在vtk中可视化真正的大图像。为此，我已将它们细分为瓷砖，现在我正在尝试浏览它们，随时调整相机。

目前我已经将WASD键分配给左右上下移动的功能。每当我在我的数据集中上下移动时，视图都会毫无问题地更新，但是每当我左右移动时图像都不会移动。如果我再次上下移动，图像会跳到正确的位置。总之，只有左右不起作用。这让我很困惑，因为我使用了几乎相同的动作功能，附加的是我的示例代码：

# current position is a  list  with x y z coordinates as filenames
#reader
metaImageReader = vtk.vtkMetaImageReader()
metaImageReader.SetFileName(filefolder + "%03d_%03d_%03d"%(currentPosition[0],currentPosition[1], currentPosition[2]) + extension)
metaImageReader.SetDataScalarTypeToUnsignedChar()
#metaImageReader.SetFileDimensionality(3)
metaImageReader.Update()

#create renderwindow
renWin = vtk.vtkRenderWindow()
renWin.SetSize(600,300)



#create renderer1
renderer_2d = vtk.vtkRenderer()
renderer_2d.SetViewport(0,0,0.5,1)
renderer_2d.SetBackground(1.0,1.0,1.0)
renWin.AddRenderer(renderer_2d)

#create renderer2
renderer_3d = vtk.vtkRenderer()
renderer_3d.SetViewport(0.5,0,1,1)
renderer_3d.SetBackground(0.0,0.0,0.0)
renWin.AddRenderer(renderer_3d)


mapper = vtk.vtkImageSliceMapper()
mapper.SetInput(metaImageReader.GetOutput())
mapper.Update()

actor = vtk.vtkImageSlice()
actor.SetMapper(mapper)
actor.Update()




renderer_2d.AddActor(actor)


def updateData():
    global metaImageReader, actor, mapper, currentPosition, filefolder, extension, viewer, origin
    metaImageReader.SetFileName(filefolder + "%03d_%03d_%03d"%(currentPosition[0],currentPosition[1], currentPosition[2]) + extension)
    metaImageReader.Update()
    mapper.Update()
    actor.Update()


def keypress(obj,event):

    key = obj.GetKeySym()
    print key
    if key == "w":
        print "w"
        moveUp()
    elif key == "s":
        print "s"
        moveDown()
    elif key == "d":
        print "d"
        moveRight()
    elif key == "a":
        print "a"
        moveLeft()


def moveUp():
    global currentPosition
    x,y,z = currentPosition
    y = y-1
    currentPosition = x,y,z
    updateData()

def moveDown():
    global currentPosition
    x,y,z = currentPosition
    y = y+1
    currentPosition = x,y,z
    updateData()

def moveRight():

    global currentPosition
    x,y,z = currentPosition
    x = x+1
    currentPosition = x,y,z
    updateData()

def moveLeft():

    global currentPosition
    x,y,z = currentPosition
    x = x-1
    currentPosition = x,y,z
    updateData()

#create interactor
iren = vtk.vtkRenderWindowInteractor()
iren.AddObserver("KeyPressEvent", keypress)
iren.SetRenderWindow(renWin)

#visualization pipeline
# Source -> Reader -> Filter -> Mapper -> Actor
iren.Start()
renWin.Render()

Answer 1

除非

renderwindow.Render（）

在

中调用

的UpdateData（）

功能行为仍然不稳定。因此，渲染窗口也需要更新。

VTK：在特定情况下，renderwindow中的更新图像失败

1 个答案: