RotationAroundLine

VTKEx/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.

Other languages

See (Cxx), (Java)

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

Code

RotationAroundLine.py

import vtk


def main():
    colors = vtk.vtkNamedColors()

    # 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()
    coneMapper1.SetInputConnection(source.GetOutputPort())

    # another mapper for the rotated cone
    coneMapper2 = vtk.vtkPolyDataMapper()
    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(colors.GetColor3d('Red'))
    # color rotated cone blue
    actor2.GetProperty().SetColor(colors.GetColor3d('Blue'))

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

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


if __name__ == '__main__':
    main()