This example creates a polygonal model of a cone, and then renders it to the screen. It will rotate the cone 360 degrees and then exit. The basic setup of
source -> mapper -> actor -> renderer -> renderwindow is typical of most VTK programs.
If you have a question about this example, please use the VTK Discourse Forum
#!/usr/bin/env python """ ========================================================================= Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen All rights reserved. See Copyright.txt or http://www.kitware.com/Copyright.htm for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the above copyright notice for more information. =========================================================================*/ """ # First access the VTK module (and any other needed modules) by importing them. import vtk def main(argv): # # Next we create an instance of vtkNamedColors and we will use # this to select colors for the object and background. # colors = vtk.vtkNamedColors() # # Now we create an instance of vtkConeSource and set some of its # properties. The instance of vtkConeSource "cone" is part of a # visualization pipeline (it is a source process object) it produces data # (output type is vtkPolyData) which other filters may process. # cone = vtk.vtkConeSource() cone.SetHeight(3.0) cone.SetRadius(1.0) cone.SetResolution(10) # # In this example we terminate the pipeline with a mapper process object. # (Intermediate filters such as vtkShrinkPolyData could be inserted in # between the source and the mapper.) We create an instance of # vtkPolyDataMapper to map the polygonal data into graphics primitives. We # connect the output of the cone source to the input of this mapper. # coneMapper = vtk.vtkPolyDataMapper() coneMapper.SetInputConnection(cone.GetOutputPort()) # # Create an actor to represent the cone. The actor orchestrates rendering # of the mapper's graphics primitives. An actor also refers to properties # via a vtkProperty instance, and includes an internal transformation # matrix. We set this actor's mapper to be coneMapper which we created # above. # coneActor = vtk.vtkActor() coneActor.SetMapper(coneMapper) coneActor.GetProperty().SetColor(colors.GetColor3d('MistyRose')) # # Create the Renderer and assign actors to it. A renderer is like a # viewport. It is part or all of a window on the screen and it is # responsible for drawing the actors it has. We also set the background # color here. # ren1 = vtk.vtkRenderer() ren1.AddActor(coneActor) ren1.SetBackground(colors.GetColor3d('MidnightBlue')) # Finally we create the render window which will show up on the screen. # We put our renderer into the render window using AddRenderer. We also # set the size to be 300 pixels by 300. # renWin = vtk.vtkRenderWindow() renWin.AddRenderer(ren1) renWin.SetSize(300, 300) renWin.SetWindowName('Tutorial_Step1') # # Now we loop over 360 degrees and render the cone each time. # for i in range(0, 360): # Render the image renWin.Render() # Rotate the active camera by one degree. ren1.GetActiveCamera().Azimuth(1) if __name__ == '__main__': import sys main(sys.argv)