Axes

VTKExamples/Python/GeometricObjects/Axes


Description

This example shows how to position an AxesActor in 3D. Notice that position and orientation of the AxesActor is done with a user transform.

Code

Axes.py

#!/usr/bin/env python

import vtk


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

    # create a Sphere
    sphereSource = vtk.vtkSphereSource()
    sphereSource.SetCenter(0.0, 0.0, 0.0)
    sphereSource.SetRadius(0.5)

    # create a mapper
    sphereMapper = vtk.vtkPolyDataMapper()
    sphereMapper.SetInputConnection(sphereSource.GetOutputPort())

    # create an actor
    sphereActor = vtk.vtkActor()
    sphereActor.SetMapper(sphereMapper)

    # a renderer and render window
    renderer = vtk.vtkRenderer()
    renderWindow = vtk.vtkRenderWindow()
    renderWindow.SetWindowName("Axes")
    renderWindow.AddRenderer(renderer)

    # an interactor
    renderWindowInteractor = vtk.vtkRenderWindowInteractor()
    renderWindowInteractor.SetRenderWindow(renderWindow)

    # add the actors to the scene
    renderer.AddActor(sphereActor)
    renderer.SetBackground(colors.GetColor3d("SlateGray"))

    transform = vtk.vtkTransform()
    transform.Translate(1.0, 0.0, 0.0)

    axes = vtk.vtkAxesActor()
    #  The axes are positioned with a user transform
    axes.SetUserTransform(transform)

    # properties of the axes labels can be set as follows
    # this sets the x axis label to red
    # axes.GetXAxisCaptionActor2D().GetCaptionTextProperty().SetColor(colors.GetColor3d("Red"));

    # the actual text of the axis label can be changed:
    # axes->SetXAxisLabelText("test");

    renderer.AddActor(axes)

    renderer.GetActiveCamera().Azimuth(50)
    renderer.GetActiveCamera().Elevation(-30)

    renderer.ResetCamera()
    renderWindow.Render()

    # begin mouse interaction
    renderWindowInteractor.Start()


if __name__ == "__main__":
    main()