Question

我已经从vtk文件中看到了一些箭头，现在我试图通过使用VTK包来可视化python中的流线。我可以得到箭头而不是streamLines。代码;

# File:        wind.py
from vtk import *

reader = vtkStructuredPointsReader()
reader.SetFileName("wind.vtk")
reader.Update()

cubeOutline = vtkOutlineFilter()
cubeOutline.SetInputConnection(reader.GetOutputPort())
cubeMapper = vtkPolyDataMapper()
cubeMapper.SetInputConnection(cubeOutline.GetOutputPort())

cubeActor = vtkActor()
cubeActor.SetMapper(cubeMapper)
cubeActor.GetProperty().SetColor(1.0,1.0,1.0)

arrow = vtkArrowSource()
arrow.SetTipRadius(0.2)
arrow.SetShaftRadius(0.075)

arrowGlyph = vtkGlyph3D()
arrowGlyph.SetInputConnection(reader.GetOutputPort())
arrowGlyph.SetSource(arrow.GetOutput())
arrowGlyph.SetScaleFactor(0.05)

arrowMapper = vtkPolyDataMapper()
arrowMapper.SetInputConnection(arrowGlyph.GetOutputPort())

arrowActor = vtkActor()
arrowActor.SetMapper(arrowMapper)

points = vtkPointSource()
points.SetRadius(3.0)
points.SetNumberOfPoints(20)

streamers = vtkStreamLine()
streamers.SetInputConnection(reader.GetOutputPort())
streamers.SetSource(points.GetOutput())
streamers.SpeedScalarsOn()
streamers.SetMaximumPropagationTime(100)
streamers.SetIntegrationStepLength(0.2)
streamers.SetTerminalSpeed(0.1)

streamMapper = vtkPolyDataMapper()
streamMapper.SetInputConnection(streamers.GetOutputPort())
streamMapper.SetScalarRange(reader.GetOutput().GetScalarRange())

streamActor = vtkActor()
streamActor.SetMapper(streamMapper)

ren = vtkRenderer()
ren.SetBackground(.2, .2, .2)

renWin = vtkRenderWindow()
renWin.SetSize(800, 600)
renWin.AddRenderer( ren )

iren = vtkRenderWindowInteractor()
iren.SetRenderWindow( renWin )

ren.AddActor(cubeActor)
ren.AddActor(arrowActor)
ren.AddActor(streamActor)

renWin.Render()
iren.Initialize()
iren.Start()

我看不出我错过了什么。

Answer 1

我几乎没有可视化流线型的经验，我的经验是vtkteem（vtkSeedTracts）。

我假设你指定的点被用作形成流线的种子。如果是这种情况，您是否也应该为这些点指定位置？我不知道你的数据是什么样的，但我觉得流线是不可见的，因为没有正确指定种子点。

希望有所帮助！

VTL中的streamLines

1 个答案: