sierpinski triangle 2d maya plug-in(with python API 2.0)

qqwe

因为python API 2.0可用的类很少,OpenMayaMpx模块里的类被整合到OpenMaya里面了,这个模块不再存在,里面的一些方法也被丢弃了,所以使用python API 2.0来写插件和1.0是有区别的,我这里就以sierpinski triangle 2d为例来看看怎么使用python API 2.0来写插件.
首先,我们的插件是一个命令插件,就是创建一mel命令,命令只有一个-times(-t)参数可使用,接受的数据类型是int,和一个以上的三角形节点,使用方法
sierpinskiTriangle -t 5 objects;
或是
from maya import cmds
cmds.sierpinskiTriangle(objects, t=5)
sierpinskiTriangleCmd.py
import sys
import maya.api.OpenMaya as om
from maya import cmds
def maya_useNewAPI():
pass
class STCmd(om.MPxCommand):
cmdName = "sierpinskiTriangle"
timeFlag = "-t"
timeLongFlag = "-times"
def __init__(self):
super(STCmd, self).__init__()
def doIt(self, args):
times = 1
timeFlagIndex = args.flagIndex(STCmd.timeFlag, STCmd.timeLongFlag)
if timeFlagIndex != om.MArgList.kInvalidArgIndex:
times = args.asInt(timeFlagIndex+1)
argData = om.MArgDatabase(self.syntax(), args)
objList = argData.getObjectList()
if objList.isEmpty():
self.displayError("No objects pass to the command or nothing is selected.")
for i in range(objList.length()):
objPath = objList.getDagPath(i)
if objPath.apiType() == om.MFn.kMesh:
obj = objPath
else:
obj = objPath.child(0)
if obj.apiType() != om.MFn.kMesh:
continue
meshFn = om.MFnMesh(obj)
if meshFn.numEdges == 3:
name = meshFn.name()
for j in range(times):
for k in range(meshFn.numPolygons):
cmds.select("%s.f[%d]" % (name, k), r=1)
edges = cmds.polyInfo(fe=1)[0].split()[-3:]
meshFn.syncObject()
meshFn.split(((meshFn.kOnEdge, int(edges[2]), 0.5), (meshFn.kOnEdge, int(edges[1]), 0.5), (meshFn.kOnEdge, int(edges[0]), 0.5), (meshFn.kOnEdge, int(edges[2]), 0.5)))
meshFn.deleteFace(meshFn.numPolygons - 1)
meshFn.updateSurface()
cmds.select(cl=1)
def cmdCreator():
return STCmd()
def syntaxCreator():
syntax = om.MSyntax()
syntax.addFlag(STCmd.timeFlag, STCmd.timeLongFlag, syntax.kUnsigned)
syntax.setObjectType(syntax.kSelectionList)
syntax.useSelectionAsDefault(True)
return syntax
def initializePlugin(mobject):
mplugin = om.MFnPlugin(mobject, "mack stone", "0.1")
try:
mplugin.registerCommand(STCmd.cmdName, cmdCreator, syntaxCreator)
except:
sys.stderr.write("Failed to register command: %s\n" % STCmd.cmdName)
raise
def uninitializePlugin(mobject):
mplugin = om.MFnPlugin(mobject)
try:
mplugin.deregisterCommand(STCmd.cmdName)
except:
sys.stderr.write("Failed to unregister command: %s\n" % STCmd.cmdName)
raise
要让maya知道你的插件是使用python API 2.0来写,必须要定义这个函数,不知道以后会不会有所改变
def maya_useNewAPI():
pass
然后其它的基本一样,因为OpenMayaMpx模块被丢弃了,所以你只需要返回你命令类的实例就行了
def cmdCreator():
return STCmd()