def camera(ren, pos=None, focal=None, viewup=None, verbose=True):
""" Change the active camera
Parameters
----------
ren : vtkRenderer
pos : tuple
(x, y, z) position of the camera
focal : tuple
(x, y, z) focal point
viewup : tuple
(x, y, z) viewup vector
verbose : bool
show information about the camera
Returns
-------
vtkCamera
"""
msg = "This function is deprecated."
msg += "Please use the window.Renderer class to get/set the active camera."
warn(DeprecationWarning(msg))
cam = ren.GetActiveCamera()
if verbose:
print('Camera Position (%.2f,%.2f,%.2f)' % cam.GetPosition())
print('Camera Focal Point (%.2f,%.2f,%.2f)' % cam.GetFocalPoint())
print('Camera View Up (%.2f,%.2f,%.2f)' % cam.GetViewUp())
if pos is not None:
cam = ren.GetActiveCamera().SetPosition(*pos)
if focal is not None:
ren.GetActiveCamera().SetFocalPoint(*focal)
if viewup is not None:
ren.GetActiveCamera().SetViewUp(*viewup)
cam = ren.GetActiveCamera()
if pos is not None or focal is not None or viewup is not None:
if verbose:
print('-------------------------------------')
print('Camera New Position (%.2f,%.2f,%.2f)' % cam.GetPosition())
print('Camera New Focal Point (%.2f,%.2f,%.2f)' %
cam.GetFocalPoint())
print('Camera New View Up (%.2f,%.2f,%.2f)' % cam.GetViewUp())
return cam
def label(ren,
text='Origin',
pos=(0, 0, 0),
scale=(0.2, 0.2, 0.2),
color=(1, 1, 1)):
''' Create a label actor.
This actor will always face the camera
Parameters
----------
ren : vtkRenderer() object
Renderer as returned by ``ren()``.
text : str
Text for the label.
pos : (3,) array_like, optional
Left down position of the label.
scale : (3,) array_like
Changes the size of the label.
color : (3,) array_like
Label color as ``(r,g,b)`` tuple.
Returns
-------
l : vtkActor object
Label.
Examples
--------
>>> from dipy.viz import fvtk
>>> r=fvtk.ren()
>>> l=fvtk.label(r)
>>> fvtk.add(r,l)
>>> #fvtk.show(r)
'''
atext = vtk.vtkVectorText()
atext.SetText(text)
textm = vtk.vtkPolyDataMapper()
if major_version <= 5:
textm.SetInput(atext.GetOutput())
else:
textm.SetInputData(atext.GetOutput())
texta = vtk.vtkFollower()
texta.SetMapper(textm)
texta.SetScale(scale)
texta.GetProperty().SetColor(color)
texta.SetPosition(pos)
ren.AddActor(texta)
texta.SetCamera(ren.GetActiveCamera())
return texta
