Question for camera position

[SCUTykLin]

Hello:
I found a curious problem of the camera position. U set the camer position is (-4, -4, 10):

render-py/render/core.py

Line 325 in e49a986

view_matrix = look_at(Vec3d(-4, -4, 10), Vec3d(0, 0, 0))

But I download the obj and visualize the 3D object:

Camera locates at the positive z axis. So you should render the back view of the object. But the result you show is the front view.