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# CreateBFont

VTKEx/Python/VisualizationAlgorithms/CreateBFont

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### Code

CreateBFont.py

    #!/usr/bin/env python

    """
    """

    import vtk

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

        fileName = get_program_parameters()

        # Now create the RenderWindow, Renderer and Interactor.
        #
        ren1 = vtk.vtkRenderer()
        renWin = vtk.vtkRenderWindow()
        renWin.AddRenderer(ren1)
        iren = vtk.vtkRenderWindowInteractor()
        iren.SetRenderWindow(renWin)

        imageIn = vtk.vtkPNMReader()
        imageIn.SetFileName(fileName)

        gaussian = vtk.vtkImageGaussianSmooth()
        gaussian.SetStandardDeviations(2, 2)
        gaussian.SetDimensionality(2)
        gaussian.SetRadiusFactors(1, 1)
        gaussian.SetInputConnection(imageIn.GetOutputPort())

        geometry = vtk.vtkImageDataGeometryFilter()
        geometry.SetInputConnection(gaussian.GetOutputPort())

        aClipper = vtk.vtkClipPolyData()
        aClipper.SetInputConnection(geometry.GetOutputPort())
        aClipper.SetValue(127.5)
        aClipper.GenerateClipScalarsOff()
        aClipper.InsideOutOn()
        aClipper.GetOutput().GetPointData().CopyScalarsOff()
        aClipper.Update()

        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(aClipper.GetOutputPort())
        mapper.ScalarVisibilityOff()

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

        ren1.AddActor(letter)
        letter.GetProperty().SetDiffuseColor(colors.GetColor3d("LampBlack"))
        letter.GetProperty().SetRepresentationToWireframe()

        ren1.SetBackground(colors.GetColor3d("WhiteSmoke"))
        ren1.ResetCamera()
        ren1.GetActiveCamera().Dolly(1.2)
        ren1.ResetCameraClippingRange()

        renWin.SetSize(640, 480)

        # Render the image.
        #
        renWin.Render()
        iren.Start()

    def get_program_parameters():
        import argparse
        description = 'A scanned image clipped with a scalar value.'
        epilogue = '''
        A scanned image clipped with a scalar value of 1/2 its maximum intensity
         produces a mixture of quadrilaterals and triangles.
       '''
        parser = argparse.ArgumentParser(description=description, epilog=epilogue,
                                         formatter_class=argparse.RawDescriptionHelpFormatter)
        parser.add_argument('filename', help='B.pgm.')
        args = parser.parse_args()
        return args.filename

    if __name__ == '__main__':
        main()