CornerAnnotation

#!/usr/bin/env python3

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.vtkRenderingAnnotation import vtkCornerAnnotation
from vtkmodules.vtkRenderingCore import (
    vtkActor,
    vtkPolyDataMapper,
    vtkRenderer,
    vtkRenderWindow,
    vtkRenderWindowInteractor
)


def main():
    colors = vtkNamedColors()

    sphere_source = vtkSphereSource()

    mapper = vtkPolyDataMapper()
    sphere_source >> mapper

    actor = vtkActor(mapper=mapper)
    actor.property.color = colors.GetColor3d('MistyRose')

    # Visualize
    renderer = vtkRenderer(background=colors.GetColor3d('DarkSlateGray'))
    render_window = vtkRenderWindow(window_name='CornerAnnotation')
    render_window.AddRenderer(renderer)

    render_window_interactor = vtkRenderWindowInteractor()
    render_window_interactor.render_window = render_window

    renderer.AddActor(actor)

    corner_annotation = vtkCornerAnnotation(linear_font_scale_factor=2, nonlinear_font_scale_factor=1,
                                            maximum_font_size=20)
    corner_annotation.SetText(0, 'lower left')
    corner_annotation.SetText(1, 'lower right')
    corner_annotation.SetText(2, 'upper left')
    corner_annotation.SetText(3, 'upper right')
    corner_annotation.GetTextProperty().color = colors.GetColor3d('Gold')

    renderer.AddViewProp(corner_annotation)

    render_window.Render()
    render_window_interactor.Start()


if __name__ == '__main__':
    main()