# ReadSLC

VTKExamples/Python/IO/ReadSLC

The following example demonstrates how to read a .slc file using vtkSLCReader. Author: Pavan Kumar B N Organization: Virtual Environments Lab, Chung-Ang University, Seoul, South Korea. Email Id: pavanbn8@gmail.com

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See (Cxx)

### Code

ReadSLC.py

    #!/usr/bin/env python

    import vtk

    def main():
        InputFilename = get_program_parameters()

        colors = vtk.vtkNamedColors()

        # vtkSLCReader to read.
        reader = vtk.vtkSLCReader()
        reader.SetFileName(InputFilename)
        reader.Update()

        # Create a mapper.
        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(reader.GetOutputPort())

        # Implementing Marching Cubes Algorithm to create the surface using vtkContourFilter object.
        contourFilter = vtk.vtkContourFilter()
        contourFilter.SetInputConnection(reader.GetOutputPort())
        contourFilter.SetValue(0, 72.0)

        outliner = vtk.vtkOutlineFilter()
        outliner.SetInputConnection(reader.GetOutputPort())
        outliner.Update()

        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(contourFilter.GetOutputPort())
        mapper.SetScalarVisibility(0)

        actor = vtk.vtkActor()
        actor.SetMapper(mapper)

        # Create a rendering window and renderer.
        renderer = vtk.vtkRenderer()
        renderWindow = vtk.vtkRenderWindow()
        renderWindow.AddRenderer(renderer)
        renderWindow.SetSize(500, 500)

        # Create a renderwindowinteractor.
        renderWindowInteractor = vtk.vtkRenderWindowInteractor()
        renderWindowInteractor.SetRenderWindow(renderWindow)

        # Assign actor to the renderer.
        renderer.AddActor(actor)
        renderer.SetBackground(colors.GetColor3d("lemon_chiffon"))

        # Pick a good view
        renderer.GetActiveCamera().SetPosition(-382.606608, -3.308563, 223.475751)
        renderer.GetActiveCamera().SetFocalPoint(77.311562, 72.821162, 100.000000)
        renderer.GetActiveCamera().SetViewUp(0.235483, 0.137775, 0.962063)
        renderer.GetActiveCamera().SetDistance(482.25171)
        renderer.GetActiveCamera().SetClippingRange(27.933848, 677.669341)
        renderWindow.Render()

        # Enable user interface interactor.
        renderWindowInteractor.Initialize()
        renderWindow.Render()
        renderWindowInteractor.Start()

    def get_program_parameters():
        import argparse
        description = 'The following example demonstrates how to read a .slc file using vtkSLCReader and how to render it with VTK.'
        epilogue = ''''''
        parser = argparse.ArgumentParser(description=description, epilog=epilogue,
                                         formatter_class=argparse.RawDescriptionHelpFormatter)
        parser.add_argument('filename1', help='vw_knee.slc.')
        args = parser.parse_args()
        return args.filename1

    if __name__ == '__main__':
        main()