load_vdb

class VdbLoader(plugin.HoudiniLoader):
    """Load VDB"""

    product_types = {"vdbcache"}
    label = "Load VDB"
    representations = {"vdb"}
    order = -10
    icon = "code-fork"
    color = "orange"

    def load(self, context, name=None, namespace=None, data=None):
        # Get the root node
        obj = hou.node("/obj")

        # Define node name
        namespace = namespace if namespace else context["folder"]["name"]
        node_name = "{}_{}".format(namespace, name) if namespace else name

        # Create a new geo node
        container = obj.createNode("geo", node_name=node_name)

        # Remove the file node, it only loads static meshes
        # Houdini 17 has removed the file node from the geo node
        file_node = container.node("file1")
        if file_node:
            file_node.destroy()

        # Explicitly create a file node
        file_node = container.createNode("file", node_name=node_name)
        path = self.filepath_from_context(context)
        file_node.setParms(
            {"file": self.format_path(path, context["representation"])})

        # Set display on last node
        file_node.setDisplayFlag(True)

        nodes = [container, file_node]
        self[:] = nodes

        return pipeline.containerise(
            node_name,
            namespace,
            nodes,
            context,
            self.__class__.__name__,
            suffix="",
        )

    @staticmethod
    def format_path(path, representation):
        """Format file path correctly for single vdb or vdb sequence."""
        # The path is either a single file or sequence in a folder.
        is_sequence = bool(representation["context"].get("frame"))
        if is_sequence:
            folder, filename = os.path.split(path)
            filename = re.sub(r"(.*)\.(\d+)\.vdb$", "\\1.$F4.vdb", filename)
            path = os.path.join(folder, filename)

        path = os.path.normpath(path)
        path = path.replace("\\", "/")
        return path

    def update(self, container, context):
        repre_entity = context["representation"]
        node = container["node"]
        try:
            file_node = next(
                n for n in node.children() if n.type().name() == "file"
            )
        except StopIteration:
            self.log.error("Could not find node of type `alembic`")
            return

        # Update the file path
        file_path = self.filepath_from_context(context)
        file_path = self.format_path(file_path, repre_entity)

        file_node.setParms({"file": file_path})

        # Update attribute
        node.setParms({"representation": repre_entity["id"]})

    def remove(self, container):
        node = container["node"]
        node.destroy()

    def switch(self, container, context):
        self.update(container, context)