Maya 2020 offsetParentMatrix shelf commands

maya_opm_shelf.py

# create opm connection (select leader then follower)
# > opm
import pulse.nodes
wm = pulse.nodes.getWorldMatrix(pm.selected()[1])
pm.selected()[0].wm >> pm.selected()[1].opm
pm.selected()[1].inheritsTransform.set(False)
pulse.nodes.setWorldMatrix(pm.selected()[1], wm)

# break opm connection
# x opm
import pulse.nodes
for s in pm.selected():
	wm = pulse.nodes.getWorldMatrix(s)
	s.opm.disconnect()
	s.opm.set(pm.dt.Matrix())
	s.inheritsTransform.set(True)
	pulse.nodes.setWorldMatrix(s, wm)

# freeze anim control
for s in pm.selected():
    localMtx = s.m.get()
    offsetMtx = s.opm.get()
    newOffsetMtx = localMtx * offsetMtx
    s.opm.set(newOffsetMtx)
    s.setMatrix(pm.dt.Matrix())

# unfreeze anim control
for s in pm.selected():
    localMtx = s.m.get()
    offsetMtx = s.opm.get()
    newLocalMtx = localMtx * offsetMtx
    s.setMatrix(newLocalMtx)
    s.opm.set(pm.dt.Matrix())