How to get rotational axis of revolute joint by API (python)

[Anonymous]

I created a box, cylinder, and as-built joint (revolute). 

I would like to get rotational axis vector of revolute joint(as-built joint).

How can I get this vector by API?

[liujac]

Hi,

The script below demonstrates how to get axis vector from RevoluteJointMotion.

import adsk.core, adsk.fusion, adsk.cam, traceback

def run(context):
    ui = None
    try:
        app = adsk.core.Application.get()
        ui  = app.userInterface
        
        root = app.activeProduct.rootComponent
        joints = root.asBuiltJoints
        joint = joints[0]
        revMotion = adsk.fusion.RevoluteJointMotion.cast(joint.jointMotion)
        axis = revMotion.rotationAxisVector
        ui.messageBox('{}, {}, {}'.format(axis.x, axis.y, axis.z))

    except:
        if ui:
            ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

Thanks,

Jack