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# SingleSplat

VTKEx/Python/VisualizationAlgorithms/SingleSplat

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### Code

SingleSplat.py

    #!/usr/bin/env python

    """
    """

    import vtk

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

        aren = vtk.vtkRenderer()
        renWin = vtk.vtkRenderWindow()
        renWin.AddRenderer(aren)
        iren = vtk.vtkRenderWindowInteractor()
        iren.SetRenderWindow(renWin)

        # Create single splat point
        pts = vtk.vtkPoints()
        verts = vtk.vtkCellArray()
        norms = vtk.vtkDoubleArray()
        scalars = vtk.vtkDoubleArray()

        x = [0.0] * 3
        pts.InsertNextPoint(x)
        norms.SetNumberOfTuples(1)
        norms.SetNumberOfComponents(3)
        n = [0] * 3
        n[0] = 0.707
        n[1] = 0.707
        n[2] = 0.0
        norms.InsertTuple(0, n)
        scalars.SetNumberOfTuples(1)
        scalars.SetNumberOfComponents(1)
        scalars.InsertTuple1(0, 1.0)

        verts.InsertNextCell(1)
        verts.InsertCellPoint(0)

        pData = vtk.vtkPolyData()
        pData.SetPoints(pts)
        pData.SetVerts(verts)
        pData.GetPointData().SetNormals(norms)
        pData.GetPointData().SetScalars(scalars)

        # Splat point and generate isosurface.
        splat = vtk.vtkGaussianSplatter()
        splat.SetInputData(pData)
        splat.SetModelBounds(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0)
        splat.SetSampleDimensions(75, 75, 75)
        splat.SetRadius(0.5)
        splat.SetEccentricity(5.0)
        splat.SetExponentFactor(-3.25)
        contour = vtk.vtkContourFilter()
        contour.SetInputConnection(splat.GetOutputPort())
        contour.SetValue(0, 0.9)
        splatMapper = vtk.vtkPolyDataMapper()
        splatMapper.SetInputConnection(contour.GetOutputPort())
        splatActor = vtk.vtkActor()
        splatActor.SetMapper(splatMapper)

        # Create outline.
        outline = vtk.vtkOutlineFilter()
        outline.SetInputConnection(splat.GetOutputPort())
        outlineMapper = vtk.vtkPolyDataMapper()
        outlineMapper.SetInputConnection(outline.GetOutputPort())
        outlineActor = vtk.vtkActor()
        outlineActor.SetMapper(outlineMapper)
        outlineActor.GetProperty().SetColor(colors.GetColor3d("Brown"))

        # Create cone to indicate direction.
        cone = vtk.vtkConeSource()
        cone.SetResolution(24)
        coneMapper = vtk.vtkPolyDataMapper()
        coneMapper.SetInputConnection(cone.GetOutputPort())
        coneActor = vtk.vtkActor()
        coneActor.SetMapper(coneMapper)
        coneActor.SetScale(0.75, 0.75, 0.75)
        coneActor.RotateZ(45.0)
        coneActor.AddPosition(0.50, 0.50, 0.0)
        coneActor.GetProperty().SetColor(colors.GetColor3d("DeepPink"))
        #
        # Rendering stuff.
        #
        aren.SetBackground(colors.GetColor3d("Beige"))
        aren.AddActor(splatActor)
        aren.AddActor(outlineActor)
        aren.AddActor(coneActor)

        renWin.SetSize(640, 480)
        renWin.Render()

        # Interact with the data.
        iren.Start()

    if __name__ == '__main__':
        main()