zbw_rig.py 文件源码

def closest_pt_on_mesh_position(point, mesh, *args):
    """rtrns position of closest pt
        #--------------------
        #inputs and outputs for "closestPointOnMesh":

        #inputs:
        #"mesh"->"inputMesh" (mesh node of transform)
        #"clusPos"->"inPosition"
        #"worldMatrix"(transform of point)->"inputMatrix"

        #outputs:
        #"position"->surfacepoint in space
        #"u"->parameter u
        #"v"->parameter v
        #"normal"->normal vector
        #"closestFaceIndex"->index of closest face
        #"closestVertexIndex"->index of closet vertex
        #---------------------
    """
    if isinstance(point, basestring):
        if isType(point, "transform"):
            # cmds.select(point, r=True)
            ptPos = cmds.xform(point, ws=True, q=True, rp=True)
            name = point
        else:
            cmds.warning("zbw_rig.closest_pt_on_mesh_position: the string you gave me isn't a transform")
            return()
    elif isinstance(point, (list, tuple)):
        if len(point)==3:
            ptPos = point
            name = mesh
        else:
            cmds.warning("zbw_rig.closest_pt_on_mesh_position: there are not the right number of indices in the "
                         "iterable you gave me. Need 3, you gave {0}".format(len(point)))
    else:
        cmds.warning("zbw_rig.closest_pt_on_mesh_position: You didn't give me a name of transform or position(array["
                     "3])")
        return()

    cpomNode = cmds.shadingNode("closestPointOnMesh", asUtility=True, n="{0}_CPOM".format(name))
    cmds.connectAttr("{0}.outMesh".format(mesh), "{0}.inMesh".format(cpomNode))
    cmds.setAttr("{0}.inPosition".format(cpomNode), ptPos[0], ptPos[1], ptPos[2])
    cmds.connectAttr("{0}.worldMatrix".format(mesh), "{0}.inputMatrix".format(cpomNode))

    cpomPos = cmds.getAttr("{0}.position".format(cpomNode))[0]
    cmds.delete(cpomNode)

    return (cpomPos)