SingleSplat
vtk-examples/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, 640)
renWin.SetWindowName('SingleSplat')
renWin.Render()
# Interact with the data.
iren.Start()
if __name__ == '__main__':
main()