RotationAroundLine

VTKExamples/Python/PolyData/RotationAroundLine


Description

NOTE: this example shows both the original and the rotated object using different colors. Not exactly equivalent to the C++ example with the same name.

Code

RotationAroundLine.py

import vtk

# create two cones, rotate one of them.

# create a rendering window and renderer
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
WIDTH = 640
HEIGHT = 480
renWin.SetSize(WIDTH, HEIGHT)

# create a renderwindowinteractor
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)

# create cone
source = vtk.vtkConeSource()
source.SetResolution(60)
source.SetCenter(-2, 0, 0)

# create a transform that rotates the cone
transform = vtk.vtkTransform()
transform.RotateWXYZ(45, 0, 1, 0)
transformFilter = vtk.vtkTransformPolyDataFilter()
transformFilter.SetTransform(transform)
transformFilter.SetInputConnection(source.GetOutputPort())
transformFilter.Update()

# mapper for original cone
coneMapper1 = vtk.vtkPolyDataMapper()
if vtk.VTK_MAJOR_VERSION <= 5:
    coneMapper1.SetInput(source.GetOutput())
else:
    coneMapper1.SetInputConnection(source.GetOutputPort())


# another mapper for the rotated cone
coneMapper2 = vtk.vtkPolyDataMapper()
if vtk.VTK_MAJOR_VERSION <= 5:
    coneMapper2.SetInput(transformFilter.GetOutput())
else:
    coneMapper2.SetInputConnection(transformFilter.GetOutputPort())

# actor for original cone
actor1 = vtk.vtkActor()
actor1.SetMapper(coneMapper1)

# actor for rotated cone
actor2 = vtk.vtkActor()
actor2.SetMapper(coneMapper2)


# color the original cone red
actor1.GetProperty().SetColor(1, 0, 0)  # (R,G,B)
# color rotated cone blue
actor2.GetProperty().SetColor(0, 0, 1)  # (R,G,B)

# assign actor to the renderer
ren.AddActor(actor1)
ren.AddActor(actor2)

# enable user interface interactor
iren.Initialize()
renWin.Render()
iren.Start()