collect_instances.py 文件源码

def process(self, context):
        from maya import cmds

        for objset in cmds.ls("*.id",
                              long=True,            # Produce full names
                              type="objectSet",     # Only consider objectSets
                              recursive=True,       # Include namespace
                              objectsOnly=True):    # Return objectSet, rather
                                                    # than its members

            is_empty = cmds.sets(objset, query=True) is None
            if is_empty:
                self.log.info("%s skipped, it was empty." % objset)
                continue

            if not cmds.objExists(objset + ".id"):
                continue

            if cmds.getAttr(objset + ".id") not in (
                    "pyblish.avalon.instance",

                    # Backwards compatibility
                    "pyblish.mindbender.instance"):

                continue

            # The developer is responsible for specifying
            # the family of each instance.
            assert cmds.objExists(objset + ".family"), (
                "\"%s\" was missing a family" % objset)

            data = dict()

            # Apply each user defined attribute as data
            for attr in cmds.listAttr(objset, userDefined=True) or list():
                try:
                    value = cmds.getAttr(objset + "." + attr)
                except Exception:
                    # Some attributes cannot be read directly,
                    # such as mesh and color attributes. These
                    # are considered non-essential to this
                    # particular publishing pipeline.
                    value = None

                data[attr] = value

            name = cmds.ls(objset, long=False)[0]  # Use short name
            instance = context.create_instance(data.get("name", name))
            instance[:] = cmds.sets(objset, query=True) or list()
            instance.data.update(data)

            # Produce diagnostic message for any graphical
            # user interface interested in visualising it.
            self.log.info("Found: \"%s\" " % instance.data["name"])