Convert Transform4f matrix to Numpy matrix or Python list

[HeyLongHoang]

Hi all, I am currently having difficulty converting Transform4 matrix to Numpy array or general Python list. I tried:
np.array(mi.traverse(sensor)['to_world']). However, this gives back a matrix of shape () and doesn't allow indexing. Do you know how to fix this? Thank you!

[HeyLongHoang]

I found the solution. You need to call M.matrix and then wrap it as Numpy array.

[njroussel]

Indeed, the Transform class is a convenience wrapper to handle transformations of points, and normals differently. The raw underyling matrix is what you most likely want here, and you can access it with my_transform.matrix.