Mayavi的 - 設置圖像的[X，Y，Z]程度編程

Question

我已經一些組成，我想在特定呈現幾個2D圖像[X，Y，Z]數據位置相對於使用彼此mayavi2 (v4.3.0)。

From the documentation看來，我應該只可以用mlab.imshow()做到這一點。不幸的是，當我打電話imshow指定extent參數（AttributeError: 'ImageActor' object has no attribute 'actor'）Mayavi的拋出異常。

我還試圖通過修改im.mlab_source.x,y,z...直接設置x，y和z的數據。古怪，而這正確地更改x和y的程度，它什麼都不做，即使im.mlab_source.z清楚地改變z位置。

這裏有一個可運行的例子：

import numpy as np 
from scipy.misc import lena 
from 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__': 

    # this works 
    normal_imshow() 

    # # this fails (AttributeError) 
    # set_extent() 

    # weirdly, this seems to work for the x and y axes, but does not change 
    # the z-postion even though data.z does change 
    set_xyz() 

Answer 1

好吧，事實證明這是一個Mayavi的known bug。但是，可以在創建對象之後更改對象的方向，位置和比例：

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