snap selected houdini nodes to cursor position

hou_nodes_to_cursor.py

# move all selected network items to cursor position
# currently breaking when backdrop containers are selected along with their children nodes (double transform)

net_editor = hou.ui.paneTabOfType(hou.paneTabType.NetworkEditor)

# get avg pos of selection
items = hou.selectedItems()
avg = hou.Vector2()

for i in items:
    avg += i.position()
avg /= len(items)

# apply offset
offset = net_editor.cursorPosition() - avg
for i in items:
    i.move(offset)