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# InteractorStyleTrackballActor

VTKEx/Python/Visualization/InteractorStyleTrackballActor

### Description

Move, rotate, and scale an object in 3D.

Question

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### Code

InteractorStyleTrackballActor.py

    import vtk

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

        # create a rendering window and renderer
        ren = vtk.vtkRenderer()
        renWin = vtk.vtkRenderWindow()
        renWin.AddRenderer(ren)

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

        style = vtk.vtkInteractorStyleTrackballActor()
        iren.SetInteractorStyle(style)

        # create source
        sphereSource = vtk.vtkSphereSource()

        # mapper
        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(sphereSource.GetOutputPort())

        # actor
        actor = vtk.vtkActor()
        actor.SetMapper(mapper)
        actor.GetProperty().SetColor(colors.GetColor3d('Chartreuse'))

        # assign actor to the renderer
        ren.AddActor(actor)
        ren.SetBackground(colors.GetColor3d('PaleGoldenrod'))

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

    if __name__ == '__main__':
        main()