def bakeManualRotateDelta(src, ctrl, presetStr):
'''
When you need to apply motion from a skeleton that is completely different from a skeleton driven
by the rig you're working with (transferring motion from old assets to newer assets for example)
you can manually align the control to the joint and then use this function to generate offset
rotations and bake a post trace cmd.
'''
srcInvMat = Matrix(getAttr('%s.worldInverseMatrix' % src))
ctrlMat = Matrix(getAttr('%s.worldMatrix' % ctrl))
#generate the offset matrix as
mat_o = ctrlMat * srcInvMat
#now figure out the euler rotations for the offset
ro = getAttr('%s.ro' % ctrl)
rotDelta = api.MATRIX_ROTATION_ORDER_CONVERSIONS_TO[ro](mat_o, True)
#now get the positional delta
posDelta = Vector(xform(src, q=True, ws=True, rp=True)) - Vector(
xform(ctrl, q=True, ws=True, rp=True))
posDelta *= -1
ctrlParentInvMat = Matrix(getAttr('%s.parentInverseMatrix' % ctrl))
posDelta = posDelta * ctrlParentInvMat
#construct a list to use for the format str
formatArgs = tuple(rotDelta) + tuple(posDelta)
#build the post trace cmd str
mel.zooSetPostTraceCmd(ctrl, presetStr % formatArgs)
return rotDelta
def bakeRotateDelta(src, ctrl, presetStr):
'''
Bakes a post trace command into the ctrl object such that when ctrl is aligned to src (with post
trace cmds enabled) src and tgt are perfectly aligned.
This is useful because rig controls are rarely aligned to the actual joints they drive, but it
can be useful when you have motion from a tool such as SFM, or generated from motion capture that
needs to be applied back to a rig.
'''
offset = api.getRotateDelta__(src, ctrl)
mel.zooSetPostTraceCmd(ctrl, presetStr % offset)
mel.zooAlign("-src %s -tgt %s -postCmds 1" % (src, ctrl))
return offset
def loadPostTraceSchemeFilepath(presetFile):
'''
re-applies a stored post trace command scheme back to the controls found in the current scene
'''
#first we need to purge all existing post trace commands
clearPostTraceScheme()
if not isinstance(presetFile, Path):
presetFile = Path(presetFile)
if not presetFile.isfile():
raise IOError, "no such preset"
xportDict, postTraceDict = presetFile.unpickle()
for n, postTraceCmd in postTraceDict.iteritems():
n = n.split('.')[0] #strip off the attribute
possibles = ls('*%s' % n, r=True)
if possibles:
nInScene = possibles[0]
mel.zooSetPostTraceCmd(nInScene, postTraceCmd)