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), (Java)

Question

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

Code¶

MultipleViewports.py

#!/usr/bin/env python

# 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()
    iren = vtkRenderWindowInteractor()
    iren.SetRenderWindow(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()
    for i in range(4):
        ren = vtkRenderer()
        rw.AddRenderer(ren)
        ren.SetViewport(xmins[i], ymins[i], xmaxs[i], ymaxs[i])

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

        # 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.AddActor(actor)
        ren.SetBackground(colors.GetColor3d(ren_bkg[i]))

        ren.ResetCamera()

    rw.Render()
    rw.SetWindowName('MultipleViewPorts')
    rw.SetSize(600, 600)
    iren.Start()


def get_sources():
    sources = list()

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

    return sources


if __name__ == '__main__':
    main()