def getAverageNodeDirectionVector(nodes, axis = mayaMathUtil.Axis()):
averageDir = om.MVector()
for node in nodes:
orientation = mayaMathUtil.eulerToDirectionVector(getObjectWorldOrientation(node), axis)
averageDir.x += orientation[0]
averageDir.y += orientation[1]
averageDir.z += orientation[2]
averageDir.normalize()
#force a direction vector if one isn't found
if(averageDir.x == 0 and averageDir.y == 0 and averageDir.z == 0):
averageDir.x = 1
return averageDir
def coplanarizeJoints(chainEnd,
chainRoot,
plane,
forwardAxis=mayaMathUtil.Axis(axis=0),
rotationAxis=mayaMathUtil.Axis(axis=2)):
if (chainRoot is None or chainEnd is None or plane is None):
return
currJoint = chainEnd
lastJoint = None
while currJoint:
currChildren = mayaUtil.getObjectChildren(currJoint)
#unparent all children so this joint can move safely without affecting children
if (currChildren is not None):
for child in currChildren:
cmds.parent(child, world=True)
oldPos = mayaUtil.getJointWorldPosition(currJoint)
oldOrient = mayaUtil.getObjectWorldOrientation(currJoint)
#cmds.makeIdentity(currJoint, apply=True, translate=True, rotate=True, scale=True, jointOrient=True)
#project the joint to the plane
newPos = mayaMathUtil.closestPointOnPlane(plane=plane, point=oldPos)
cmds.xform(currJoint,
absolute=True,
worldSpace=True,
translation=[newPos.x, newPos.y, newPos.z])
#now orient the joint
#don't orient if this is the last child in the chain and it has children of its own
if (lastJoint is not None
or (lastJoint is None and currChildren is None)):
deleteAimTarget = False
aimTarget = lastJoint
#if no lastJoint, this is the last child in the joint chain so project its previous aim direction to a point on the plane and aim it in that direction to keep it approximately the same
#there's probably a more mathematically correct way to do this but whatever...
if (lastJoint is None):
deleteAimTarget = True
aimLocation = mayaMathUtil.closestPointOnPlane(
plane=plane,
point=oldPos + mayaMathUtil.eulerToDirectionVector(
oldOrient, forwardAxis) * 10)
aimTarget = cmds.spaceLocator()
cmds.xform(
aimTarget,
worldSpace=True,
absolute=True,
translation=[aimLocation.x, aimLocation.y, aimLocation.z])
aimVector = mayaMathUtil.forwardVector(forwardAxis)
turnVector = mayaMathUtil.forwardVector(rotationAxis)
#not sure how else to do this easily, the idea is taken from Comet Joint Orient
tempAimConstraint = cmds.aimConstraint(
aimTarget,
currJoint,
weight=1,
aimVector=[aimVector.x, aimVector.y, aimVector.z],
upVector=[turnVector.x, turnVector.y, turnVector.z],
worldUpVector=[
plane.normal().x,
plane.normal().y,
plane.normal().z
],
worldUpType="vector")
cmds.delete(tempAimConstraint)
#delete the temporary locator we created if lastJoint was None
if (deleteAimTarget):
cmds.delete(aimTarget)
cmds.joint(currJoint, edit=True, zeroScaleOrient=True)
if (currChildren is not None):
for child in currChildren:
cmds.parent(child, currJoint)
cmds.makeIdentity(child, apply=True, jointOrient=False)
if (currJoint == chainRoot):
return
lastJoint = currJoint
currJoint = mayaUtil.getObjectParent(currJoint)
return
def coplanarizeJoints(chainEnd, chainRoot, plane, forwardAxis = mayaMathUtil.Axis(axis=0), rotationAxis = mayaMathUtil.Axis(axis=2)):
if(chainRoot is None or chainEnd is None or plane is None):
return
currJoint = chainEnd
lastJoint = None
while currJoint:
currChildren = mayaUtil.getObjectChildren(currJoint)
#unparent all children so this joint can move safely without affecting children
if(currChildren is not None):
for child in currChildren:
cmds.parent(child, world=True)
oldPos = mayaUtil.getJointWorldPosition(currJoint)
oldOrient = mayaUtil.getObjectWorldOrientation(currJoint)
#cmds.makeIdentity(currJoint, apply=True, translate=True, rotate=True, scale=True, jointOrient=True)
#project the joint to the plane
newPos = mayaMathUtil.closestPointOnPlane(plane=plane, point=oldPos)
cmds.xform(currJoint, absolute=True, worldSpace=True, translation=[newPos.x, newPos.y, newPos.z])
#now orient the joint
#don't orient if this is the last child in the chain and it has children of its own
if(lastJoint is not None or (lastJoint is None and currChildren is None)):
deleteAimTarget = False
aimTarget = lastJoint
#if no lastJoint, this is the last child in the joint chain so project its previous aim direction to a point on the plane and aim it in that direction to keep it approximately the same
#there's probably a more mathematically correct way to do this but whatever...
if(lastJoint is None):
deleteAimTarget = True
aimLocation = mayaMathUtil.closestPointOnPlane(plane=plane, point=oldPos + mayaMathUtil.eulerToDirectionVector(oldOrient, forwardAxis) * 10)
aimTarget = cmds.spaceLocator()
cmds.xform(aimTarget, worldSpace=True, absolute=True, translation=[aimLocation.x, aimLocation.y, aimLocation.z])
aimVector = mayaMathUtil.forwardVector(forwardAxis)
turnVector = mayaMathUtil.forwardVector(rotationAxis)
#not sure how else to do this easily, the idea is taken from Comet Joint Orient
tempAimConstraint = cmds.aimConstraint(aimTarget, currJoint, weight=1, aimVector=[aimVector.x, aimVector.y, aimVector.z], upVector=[turnVector.x, turnVector.y, turnVector.z], worldUpVector=[plane.normal().x, plane.normal().y, plane.normal().z], worldUpType="vector")
cmds.delete(tempAimConstraint)
#delete the temporary locator we created if lastJoint was None
if(deleteAimTarget):
cmds.delete(aimTarget)
cmds.joint(currJoint, edit=True, zeroScaleOrient=True)
if(currChildren is not None):
for child in currChildren:
cmds.parent(child, currJoint)
cmds.makeIdentity(child, apply=True, jointOrient=False)
if(currJoint == chainRoot):
return
lastJoint = currJoint
currJoint = mayaUtil.getObjectParent(currJoint)
return