'''Joint Curve Tool'''

import maya.cmds as mc

'''创建圆环，适当旋转其中两个的旋转参数，冻结属性，

将任意两个圆环的shape节点放在另一个圆环下面，

删除那两个圆环的变换节点，重命名，删除历史'''

cv1 = mc.circle(c=(0,0,0),nr=(0,1,0),sw=360,r=1,d=3,ut=1,ch=1)

cv2 = mc.circle(c=(0,0,0),nr=(0,1,0),sw=360,r=1,d=3,ut=1,ch=1)

cv3 = mc.circle(c=(0,0,0),nr=(0,1,0),sw=360,r=1,d=3,ut=1,ch=1)

//  设置旋转通道的值，不知道 rotate 命令怎么设置，就用了 rotate

mc.setAttr(cv2[0]+'.rotateZ',90)

mc.setAttr(cv3[0]+'.rotateX',90)

mc.select(cv2[0],cv3[0],add=1)

mc.makeIdentity(apply=1,t=1,r=1,s=1)

shpcv2 = mc.listRelatives(cv2[0],s=1)

shpcv3 = mc.listRelatives(cv3[0],shapes=1)

mc.parent(shpcv2,cv1[0],r=1,s=1)

mc.parent(shpcv3,cv1[0],r=1,s=1)

mc.delete(cv2[0],cv3[0])

rnm = mc.rename(cv1[0],"jntCrv")

mc.DeleteHistory(rnm)

mc.select(rnm)