python
import maya.api.OpenMaya as om2
import maya.cmds as mc
def dagObjFromName(name):
sel = om2.MSelectionList()
sel.add(name)
# 如果没有Dagpath会报错
# dag =sel.getDagPath(0)
mobj = sel.getDependNode(0)
return mobj, dag
def locatorToPoint(locator):
pos = mc.xform(locator, q=1, rp=1, ws=1)
return om2.MPoint(pos[0], pos[1], pos[2],1.0)
def createLocatorAtClosestPoint(mySphere, myLocator):
obj,dag = dagObjFromName(mySphere)
meshFn = om2.MFnMesh(dag)
point = locatorToPoint(myLocator)
resultPoint = meshFn.getClosestPoint(point,om2.MSpace.kWorld)[0]
result = mc.spaceLocator()[0]
mc.setAttr(result+'.t', resultPoint[0], resultPoint[1], resultPoint[2])
mySphere = mc.polySphere()[0]
myLocator = mc.spaceLocator()[0]
# now move locator arround and execute
createLocatorAtClosestPoint(mySphere, myLocator)
