LongLine
vtk-examples/Python/GeometricObjects/LongLine
Description¶
Connect several points with a line.
Seealso
Question
If you have a question about this example, please use the VTK Discourse Forum
Code¶
LongLine.py
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import vtk
def main():
# Create five points.
origin = [0.0, 0.0, 0.0]
p0 = [1.0, 0.0, 0.0]
p1 = [0.0, 1.0, 0.0]
p2 = [0.0, 1.0, 2.0]
p3 = [1.0, 2.0, 3.0]
# Create a vtkPoints object and store the points in it
points = vtk.vtkPoints()
points.InsertNextPoint(origin)
points.InsertNextPoint(p0)
points.InsertNextPoint(p1)
points.InsertNextPoint(p2)
points.InsertNextPoint(p3)
# Create a cell array to store the lines in and add the lines to it
lines = vtk.vtkCellArray()
for i in range(0, 3):
line = vtk.vtkLine()
line.GetPointIds().SetId(0, i)
line.GetPointIds().SetId(1, i + 1)
lines.InsertNextCell(line)
# Create a polydata to store everything in
linesPolyData = vtk.vtkPolyData()
# Add the points to the dataset
linesPolyData.SetPoints(points)
# Add the lines to the dataset
linesPolyData.SetLines(lines)
# Setup actor and mapper
colors = vtk.vtkNamedColors()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(linesPolyData)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetLineWidth(4)
actor.GetProperty().SetColor(colors.GetColor3d('Peacock'))
# Setup render window, renderer, and interactor
renderer = vtk.vtkRenderer()
renderWindow = vtk.vtkRenderWindow()
renderWindow.SetWindowName('LongLine')
renderWindow.AddRenderer(renderer)
renderWindowInteractor = vtk.vtkRenderWindowInteractor()
renderWindowInteractor.SetRenderWindow(renderWindow)
renderer.AddActor(actor)
renderer.ResetCamera()
renderer.GetActiveCamera().Azimuth(30)
renderer.GetActiveCamera().Elevation(30)
renderer.ResetCameraClippingRange()
renderer.SetBackground(colors.GetColor3d('Silver'))
renderWindow.Render()
renderWindowInteractor.Start()
if __name__ == '__main__':
main()