zbw_rig.py 文件源码

def alignToUV(targetObj="none", sourceObj="none", sourceU=0.0, sourceV=0.0, mainAxis="+z", secAxis="+x", UorV="v"):
    """
    inputs should be 1. targetObj 2. sourceObj 3. sourceU 4. sourceV 5. mainAxis(lowerCase, + or -, i.e."-x" 8. secAxis (lowcase, + or -) 7, UorV ("u" or "v" for the direction along surface for the sec axis)
"""

    axisDict = {"+x":(1,0,0), "+y":(0,1,0), "+z":(0,0,1), "-x":(-1,0,0), "-y":(0,-1,0), "-z":(0,0,-1)}

    #Does this create a new node? no To create a node, use the flag "ch=True". That creates a pointOnSurface node
    pos = cmds.pointOnSurface(sourceObj, u=sourceU, v=sourceV, position=True)
    posVec = om.MVector(pos[0], pos[1], pos[2])
    cmds.xform(targetObj, ws=True, t=pos)

    #get normal, tanU and tanV at selected UV position on source surface
    tanV = cmds.pointOnSurface(sourceObj, u=sourceU, v=sourceV, tv=True)
    tanU = cmds.pointOnSurface(sourceObj, u=sourceU, v=sourceV, tu=True)
    norm = cmds.pointOnSurface(sourceObj, u=sourceU, v=sourceV, nn=True)

    #decide where up axis is on normal constraint, u or v tangent
    if UorV == "v":
        wup = tanV
    elif UorV == "u":
        wup = tanU

    #create normal constraint
    nc = cmds.normalConstraint(sourceObj, targetObj, aimVector=axisDict[mainAxis], upVector=axisDict[secAxis], worldUpVector=(wup))
    cmds.delete(nc) #delete constraint