python - mayavi - setting the [x,y,z] extent of an image programatically -

i have data consists of several 2d images render in specific [x,y,z] positions relative 1 using mayavi2 (v4.3.0).

from documentation seems should able mlab.imshow(). unfortunately, mayavi throws exception when call imshow specifying extent parameter (attributeerror: 'imageactor' object has no attribute 'actor').

i tried setting x,y , z data directly modifying im.mlab_source.x,y,z.... weirdly, whilst correctly changes x , y extents, nothing z-position though im.mlab_source.z changes.

here's runnable example:

import numpy np scipy.misc import lena mayavi import mlab  def normal_imshow(img=lena()):     return mlab.imshow(img,colormap='gray')   def set_extent(img=lena()):     return mlab.imshow(img,extent=[0,100,0,100,50,50],colormap='cool')  def set_xyz(img=lena()):     im = mlab.imshow(img,colormap='hot')         src = im.mlab_source     print 'old z :',src.z     src.x = 100*(src.x - src.x.min())/(src.x.max() - src.x.min())     src.y = 100*(src.y - src.y.min())/(src.x.max() - src.y.min())     src.z[:] = 50     print 'new z :',src.z     return im  if __name__ == '__main__':      # works     normal_imshow()      # # fails (attributeerror)     # set_extent()      # weirdly, seems work x , y axes, not change     # z-postion though data.z change     set_xyz() 

ok, turns out known bug in mayavi. however, possible change orientation, position , scale of imageactor object after has been created:

obj = mlab.imshow(img) obj.actor.orientation = [0, 0, 0]  # required orientation  obj.actor.position = [0, 0, 0]     # required  position  obj.actor.scale = [0, 0, 0]        # required scale