3.2 SDK has some invalid function

[PonyPC]

    transform = sl.Transform()
    transform[0,0] = 0
    transform[0,1] = 1
    print(transform.get_rotation_matrix())

transform is always identity matrix no matter how mat is.

    tracking_params = sl.PositionalTrackingParameters(transform)
    transform2 = sl.Transform()
    print(tracking_params.initial_world_transform(transform2))
    print(transform2)

transform2 is always identity matrix no matter how transform is.

Others like get_orientation, get_euler_angles also. Do I have mistake?

[qt-truong]

Hi there,

You are trying to modify a Transform object, which contains rotation and translation data. By default, the rotation will be an identity matrix. If you want to set a custom rotation matrix to your transform object, you should try to do instead :

transform = sl.Transform()

py_rotation = sl.Rotation()   # Identity matrix 3x3
py_rotation[0,0] = 0
py_rotation[0,1] = 1 

transform.set_rotation_matrix(py_rotation)
print(transform.get_rotation_matrix())

It would result in something like :

0.000000 1.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000

You should get the corresponding orientation and euler angles If you try get_orientation() and get_euler_angles() on the newly set transform.

As for transform2, you are also instantiating it by default so it will result in an identity matrix.

Hope it helps !

[PonyPC]

I follow your code, it does print

0.000000 1.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000

But print(transform) is still an identity matrix.

1.000000 0.000000 0.000000 0.000000
0.000000 1.000000 0.000000 0.000000
0.000000 0.000000 1.000000 0.000000
0.000000 0.000000 0.000000 1.000000

If I set

tracking_params = sl.PositionalTrackingParameters(transform)

Is tracking_params initialized by identity matrix or not?