Cone3

VTKExamples/Python/Rendering/Cone3


Code

Cone3.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

#
# This example demonstrates how to use multiple renderers within a
# render window. It is a variation of the Cone1.py example. Please
# refer to that example for additional documentation.
#

import time

import vtk


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

    #
    # Next 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)

    #
    # Create two renderers and assign actors to them. A renderer renders into a
    # viewport within the vtkRenderWindow. 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. In this example we are adding the same actor
    # to two different renderers; it is okay to add different actors to
    # different renderers as well.
    #
    ren1 = vtk.vtkRenderer()
    ren1.AddActor(coneActor)
    ren1.SetBackground(colors.GetColor3d("SlateGray"))
    ren1.SetViewport(0.0, 0.0, 0.5, 1.0)

    ren2 = vtk.vtkRenderer()
    ren2.AddActor(coneActor)
    ren2.SetBackground(colors.GetColor3d("LightSlateGray"))
    ren2.SetViewport(0.5, 0.0, 1.0, 1.0)

    #
    # Finally we create the render window which will show up on the screen.
    # We add our two renderers into the render window using AddRenderer. We also
    # set the size to be 600 pixels by 300.
    #
    renWin = vtk.vtkRenderWindow()
    renWin.AddRenderer(ren1)
    renWin.AddRenderer(ren2)
    renWin.SetSize(600, 300)

    iren = vtk.vtkRenderWindowInteractor()
    iren.SetRenderWindow(renWin)

    #
    # Make one camera view 90 degrees from the other.
    #
    ren1.ResetCamera()
    ren1.GetActiveCamera().Azimuth(90)

    #
    # Now we loop over 60 degrees and render the cone each time.
    #
    for i in range(0, 60):
        time.sleep(0.03)

        renWin.Render()
        ren1.GetActiveCamera().Azimuth(1)
        ren2.GetActiveCamera().Azimuth(1)

    iren.Start()


if __name__ == "__main__":
    main()