godot-docs/tutorials/navigation/navigation_different_actor_locomotion.rst

.. _doc_navigation_different_actor_locomotion:

Support different actor locomotion
==================================

.. image:: img/nav_actor_locomotion.png

To support different actor locomotion like crouching and crawling, a similar 
map setup as supporting :ref:`doc_navigation_different_actor_types` is required.

Bake different navigation meshes with an appropriate height for crouched 
or crawling actors so they can find paths through those narrow sections in your game world.

When an actor changes locomotion state, e.g. stands up, starts 
crouching or crawling, query the appropriate map for a path.

If the avoidance behavior should also change with the locomotion e.g. only avoid while standing or only avoid 
other agents in the same locomotion state, switch the actors's avoidance agent to another avoidance map with each locomotion change.

.. tabs::
 .. code-tab:: gdscript GDScript
    
    func update_path():
        
        if actor_standing:
            path = NavigationServer3D.map_get_path(standing_navigation_map_rid, start_position, target_position, true)
        elif actor_crouching:
            path = NavigationServer3D.map_get_path(crouched_navigation_map_rid, start_position, target_position, true)
        elif actor_crawling:
            path = NavigationServer3D.map_get_path(crawling_navigation_map_rid, start_position, target_position, true)
    
    func change_agent_avoidance_state():
        
        if actor_standing:
            NavigationServer3D.agent_set_map(avoidance_agent_rid, standing_navigation_map_rid)
        elif actor_crouching:
            NavigationServer3D.agent_set_map(avoidance_agent_rid, crouched_navigation_map_rid)
        elif actor_crawling:
            NavigationServer3D.agent_set_map(avoidance_agent_rid, crawling_navigation_map_rid)

.. note::

    While a path query can be execute immediately for multiple maps, the avoidance agent map switch will only take effect after the next server synchronization.