MultipleViewports

Description¶

This example creates a window with 4 viewports. Updating the camera position in one viewport will also update the position in the other viewports.

See MultipleRenderWindows for an example using multiple windows.

Other languages

See (Cxx), (Python), (Java)

Question

If you have a question about this example, please use the VTK Discourse Forum

Code¶

MultipleViewports.py

#!/usr/bin/env python3

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


def main():
    colors = vtkNamedColors()

    # One render window, multiple viewports.
    rw = vtkRenderWindow(size=(600, 600), window_name='MultipleViewPorts')
    iren = vtkRenderWindowInteractor()
    iren.render_window = rw

    # Define viewport ranges.
    xmins = [0, .5, 0, .5]
    xmaxs = [0.5, 1, 0.5, 1]
    ymins = [0, 0, .5, .5]
    ymaxs = [0.5, 0.5, 1, 1]

    # Have some fun with colors.
    ren_bkg = ['AliceBlue', 'GhostWhite', 'WhiteSmoke', 'Seashell']
    actor_color = ['Bisque', 'RosyBrown', 'Goldenrod', 'Chocolate']

    sources = get_sources()
    camera = None
    for i in range(4):

        # Create a mapper and actor
        mapper = vtkPolyDataMapper()
        mapper.SetInputConnection(sources[i].GetOutputPort())
        actor = vtkActor()
        actor.GetProperty().SetColor(colors.GetColor3d(actor_color[i]))
        actor.SetMapper(mapper)

        ren = vtkRenderer(viewport=(xmins[i], ymins[i], xmaxs[i], ymaxs[i]), background=colors.GetColor3d(ren_bkg[i]))
        rw.AddRenderer(ren)

        ren.AddActor(actor)

        # Share the camera between viewports.
        if i == 0:
            camera = ren.active_camera
            camera.Azimuth(30)
            camera.Elevation(30)
        else:
            ren.active_camera = camera

        ren.ResetCamera()

    rw.Render()
    iren.Start()


def get_sources():
    sources = list()

    # Create a sphere
    sphere = vtkSphereSource(center=(0.0, 0.0, 0.0))
    sources.append(sphere)
    cone = vtkConeSource(center=(0.0, 0.0, 0.0), direction=(0, 1, 0))
    sources.append(cone)
    cube = vtkCubeSource(center=(0.0, 0.0, 0.0))
    sources.append(cube)
    cylinder = vtkCylinderSource(center=(0.0, 0.0, 0.0))
    sources.append(cylinder)

    return sources


if __name__ == '__main__':
    main()