【笔记】【Maya工具】Python For Maya（Cmds）（二）Object Renamer & Create Gear

一、Object Renamer

1
2
from maya import cmds
print(cmds.ls())

返回了场景里面所有物体名称组成一个列表，包括一些隐藏物体和对象

1
2
3
4
5
6
7
selection = cmds.ls(selection = True)
if len(selection)==0:
    selection = cmds.ls(dag=True,long=True)
selection.sort(key = len,reverse)
#名称越长越是子物体
#这个排序是为了让遍历列表的时候，子物体先进行改变，再改变父物体。如果先改变父物体，那么子物体会受到同样的影响。
print(selection)

image-20220628234233927

这里处理返回完整path name是为了放置不同层级物体同名的情况

image-20220628234344658

image-20220628234428788

Dag参数使得列表返回所有dag对象的物体（大纲中的仅显示Dag对象物体）

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
for obj in selection:
	shortName = obj.split('|')[-1]#取dagpath最后一个，就是物体名字了
    #print(cmds.objectType(obj))#transform我们已经知道它为什么是transform了，实际上在maya大纲中可以右键选择shape可见
    children = cmds.listRelatives(obj,children = True, fullPath = True) or []#None则直接返回成空列表，因为这个东西很烦，没有东西返回None，不是空列表类型
    if (len(children) == 1):
        child = children[0]
        objType = cmds.objectType(child)
    else:
        objType = cmds.objectType(obj)
    if objType == "mesh":
        suffix = "geo"
    elif objType == "joint":
        suffix = "jnt"
    elif objType == "camera":
        continue
    else:
        suffix = "grp"
    newName = shortName + "_" + suffix
    
    cmds.rename(obj, newName)

使用函数

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
from maya import cmds
SUFFIXES = {
    "mesh":"geo",
	"joint":"jnt",
	"camera": None,
    "ambientLight":"lgt"
}
DEFAULT_SUFFIX = "grp"
def rename(selection = False):
    """
    This function will rename any objects to have the correct suffix
    Args:
        selection: Whether or not we use the current selections
   	
    Returns:
        A list of all the objects we operated on
        
    """

    objects = cmds.ls(selection = selection,dag = True, long = True)
    
	if selection and not objects:
        raise RuntimeError("You dont have anything selected")
        
        
    objects.sort(key = len, reverse = True)
    for obj in objects:
        shortName = obj.split('|')[-1]#取dagpath最后一个，就是物体名字了
        #print(cmds.objectType(obj))#transform我们已经知道它为什么是transform了，实际上在maya大纲中可以右键选择shape可见
        children = cmds.listRelatives(obj,children = True, fullPath = True) or []#None则直接返回成空列表，因为这个东西很烦，没有东西返回None，不是空列表类型
        print(children)
        if (len(children) == 1):
            child = children[0]
            objType = cmds.objectType(child)
        else:
            objType = cmds.objectType(obj)

		suffix = SUFFIXES.get(objType, DEFUALT_SUFFIXES)
        if not suffix:
            continue
        if obj.endswith('_'+suffix):
            continue
        newName = "{}_{}".format(shortName,suffix)

        cmds.rename(obj, newName)
        index = objects.index(obj)
        objects[index] = obj.replace(shortName,newName)
    return objects

在外面改变脚本后，maya不会直接识别到，需要使用reload方法

1
2
import someModule
reload(someModule)

二、Create Gear

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
from maya import cmds

def createGear(teeth = 10, length = 0.3):
    # Teeth are every alternate face, so spans x 2
    print("Creating Gear", teeth,length)
    spans = teeth * 2
    
    transform,constructor = cmds.polyPipe(subdivisionsAxis = spans)
    sideFaces = range(spans*2,spans*3,2)
    #因为pipe侧面是从spans*2开始计数的，0-spans是顶面
    cmds.select(clear = True)
    
    for face in sideFaces:
        cmds.select('{}.f[{}]'.format(transform, face), add = True)#添加到选择集，而不是重新选择
    extrude = cmds.polyExtrudeFacet(localTranslateZ = length)[0]
    return transform, constructor, extrude

def changeTeeth(constructor,extrude,teeth = 10, length = 0.3):
    spans = teeth * 2
    cmds.polyPipe(constructor, edit = True, subdivisionsAxis = spans)
    
    sideFaces = range(spans*2,spans*3,2)
    faceNames = []
    
    for face in sideFaces:
        faceName = 'f[{}]'.format(face)
        faceNames.append(faceName)
        
    cmds.setAttr('{}.inputComponents'.format(extrude),len(faceNames),*faceNames,type = "componentList")
    cmds.polyExtrudeFacet(extrude, edit = True, ltz = length)

    
changeTeeth(constructor,extrude,teeth = 40)

2.1使用类

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
from maya import cmds
class Gear(object):
    def __init__(self):
        self.transofrm = None
        self.extrude = None
        self.constructor = None
    def creatGear(self, teeth = 10, length = 0.3):
        spans = teeth * 2

        self.transform, self.constructor = cmds.polyPipe(subdivisionsAxis = spans)
        sideFaces = range(spans*2,spans*3,2)
        cmds.select(clear = True)

        for face in sideFaces:
            cmds.select('{}.f[{}]'.format(self.transform, face), add = True)#添加到选择集，
        self.extrude = cmds.polyExtrudeFacet(localTranslateZ = length)[0]

    def changeTeeth(self,teeth = 10, length = 0.3):
        spans = teeth * 2
        cmds.polyPipe(self.constructor, edit = True, subdivisionsAxis = spans)

        sideFaces = range(spans*2,spans*3,2)
        faceNames = []

        for face in sideFaces:
            faceName = 'f[{}]'.format(face)
            faceNames.append(faceName)

        cmds.setAttr('{}.inputComponents'.format(self.extrude),len(faceNames),*faceNames,type = "componentList")
        cmds.polyExtrudeFacet(self.extrude, edit = True, ltz = length)