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#!/usr/bin/env python
from vtkmodules.vtkCommonCore import (
vtkMath,
vtkPoints,
)
from vtkmodules.vtkCommonDataModel import (
vtkCellArray,
vtkPolyData,
)
from vtkmodules.vtkCommonComputationalGeometry import vtkCardinalSpline
from vtkmodules.vtkFiltersCore import (
vtkGlyph3D,
vtkTubeFilter,
)
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.vtkRenderingCore import (
vtkActor,
vtkPolyDataMapper,
vtkRenderWindow,
vtkRenderWindowInteractor,
vtkRenderer,
)
import vtkmodules.vtkInteractionStyle
import vtkmodules.vtkRenderingFreeType
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
# Now create the RenderWindow, Renderer and Interactor
#
ren1 = vtkRenderer()
renWin = vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
math = vtkMath()
numberOfInputPoints = 30
aSplineX = vtkCardinalSpline()
aSplineY = vtkCardinalSpline()
aSplineZ = vtkCardinalSpline()
# generate random points
inputPoints = vtkPoints()
i = 0
while i < numberOfInputPoints:
x = math.Random(0, 1)
y = math.Random(0, 1)
z = math.Random(0, 1)
aSplineX.AddPoint(i, x)
aSplineY.AddPoint(i, y)
aSplineZ.AddPoint(i, z)
inputPoints.InsertPoint(i, x, y, z)
i += 1
inputData = vtkPolyData()
inputData.SetPoints(inputPoints)
balls = vtkSphereSource()
balls.SetRadius(.01)
balls.SetPhiResolution(10)
balls.SetThetaResolution(10)
glyphPoints = vtkGlyph3D()
glyphPoints.SetInputData(inputData)
glyphPoints.SetSourceConnection(balls.GetOutputPort())
glyphMapper = vtkPolyDataMapper()
glyphMapper.SetInputConnection(glyphPoints.GetOutputPort())
glyph = vtkActor()
glyph.SetMapper(glyphMapper)
glyph.GetProperty().SetDiffuseColor(1, 0.4, 0.4)
glyph.GetProperty().SetSpecular(.3)
glyph.GetProperty().SetSpecularPower(30)
ren1.AddActor(glyph)
# create a polyline
points = vtkPoints()
profileData = vtkPolyData()
numberOfOutputPoints = 400
offset = 1.0
def fit ():
points.Reset()
i = 0
while i < numberOfOutputPoints:
t = (numberOfInputPoints - offset) / (numberOfOutputPoints - 1) * i
points.InsertPoint(i, aSplineX.Evaluate(t), aSplineY.Evaluate(t), aSplineZ.Evaluate(t))
i += 1
profileData.Modified()
fit()
lines = vtkCellArray()
lines.InsertNextCell(numberOfOutputPoints)
i = 0
while i < numberOfOutputPoints:
lines.InsertCellPoint(i)
i += 1
profileData.SetPoints(points)
profileData.SetLines(lines)
profileTubes = vtkTubeFilter()
profileTubes.SetNumberOfSides(8)
profileTubes.SetInputData(profileData)
profileTubes.SetRadius(.005)
profileMapper = vtkPolyDataMapper()
profileMapper.SetInputConnection(profileTubes.GetOutputPort())
profile = vtkActor()
profile.SetMapper(profileMapper)
profile.GetProperty().SetDiffuseColor(1, 1, 0.6)
profile.GetProperty().SetSpecular(.3)
profile.GetProperty().SetSpecularPower(30)
ren1.AddActor(profile)
ren1.ResetCamera()
ren1.GetActiveCamera().Dolly(1.5)
ren1.ResetCameraClippingRange()
renWin.SetSize(400, 400)
# render the image
#
iren.Initialize()
def opened (aSplineX, aSplineY, aSplineZ):
offset = 1.0
aSplineX.ClosedOff()
aSplineY.ClosedOff()
aSplineZ.ClosedOff()
fit()
renWin.Render()
def varyLeft (aSplineX, aSplineY, aSplineZ):
left = -1
while left <= 1:
aSplineX.SetLeftValue(left)
aSplineY.SetLeftValue(left)
aSplineZ.SetLeftValue(left)
fit()
renWin.Render()
left += 0.05
def varyRight (aSplineX, aSplineY, aSplineZ):
right = -1
while right <= 1:
aSplineX.SetRightValue(right)
aSplineY.SetRightValue(right)
aSplineZ.SetRightValue(right)
fit()
renWin.Render()
right += 0.05
def constraint (value, aSplineX, aSplineY, aSplineZ):
aSplineX.SetLeftConstraint(value)
aSplineY.SetLeftConstraint(value)
aSplineZ.SetLeftConstraint(value)
aSplineX.SetRightConstraint(value)
aSplineY.SetRightConstraint(value)
aSplineZ.SetRightConstraint(value)
def closed (aSplineX, aSplineY, aSplineZ):
offset = 0.0
aSplineX.ClosedOn()
aSplineY.ClosedOn()
aSplineZ.ClosedOn()
fit()
renWin.Render()
#iren.Start()
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