<?xml version="1.0" encoding="UTF-8" ?>
<class name="NavigationPolygonInstance" inherits="Node2D" version="4.2">
	<brief_description>
		A region of the 2D navigation map.
	</brief_description>
	<description>
		A region of the navigation map. It tells the [Navigation2DServer] what can be navigated and what cannot, based on its [NavigationPolygon] resource.
		By default this node will register to the default [World2D] navigation map. If this node is a child of a [Navigation2D] node it will register to the navigation map of the navigation node.
		Two regions can be connected to each other if they share a similar edge. You can set the minimum distance between two vertices required to connect two edges by using [method Navigation2DServer.map_set_edge_connection_margin].
		[b]Note:[/b] Overlapping two regions' polygons is not enough for connecting two regions. They must share a similar edge.
		The pathfinding cost of entering this region from another region can be controlled with the [member enter_cost] value.
		[b]Note[/b]: This value is not added to the path cost when the start position is already inside this region.
		The pathfinding cost of traveling distances inside this region can be controlled with the [member travel_cost] multiplier.
	</description>
	<tutorials>
		<link title="Using NavigationRegions">$DOCS_URL/tutorials/navigation/navigation_using_navigationregions.md</link>
	</tutorials>
	<methods>
		<method name="bake_navigation_polygon">
			<return type="void" />
			<argument index="0" name="on_thread" type="bool" />
			<description>
				Bakes the [NavigationPolygon]. If [param on_thread] is set to [code]true[/code] (default), the baking is done on a separate thread.
			</description>
		</method>
		<method name="get_avoidance_layer_value" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="layer_number" type="int" />
			<description>
				Returns whether or not the specified layer of the [member avoidance_layers] bitmask is enabled, given a [param layer_number] between 1 and 32.
			</description>
		</method>
		<method name="get_navigation_layer_value" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="layer_number" type="int" />
			<description>
				Returns whether or not the specified layer of the [member navigation_layers] bitmask is enabled, given a [code]layer_number[/code] between 1 and 32.
			</description>
		</method>
		<method name="get_navigation_map" qualifiers="const">
			<return type="RID" />
			<description>
				Returns the current navigation map [RID] use by this region.
			</description>
		</method>
		<method name="get_region_rid" qualifiers="const">
			<return type="RID" />
			<description>
				Returns the [RID] of this region on the [Navigation2DServer]. Combined with [method Navigation2DServer.map_get_closest_point_owner] can be used to identify the [NavigationPolygonInstance] closest to a point on the merged navigation map.
			</description>
		</method>
		<method name="set_avoidance_layer_value">
			<return type="void" />
			<argument index="0" name="layer_number" type="int" />
			<argument index="1" name="value" type="bool" />
			<description>
				Based on [param value], enables or disables the specified layer in the [member avoidance_layers] bitmask, given a [param layer_number] between 1 and 32.
			</description>
		</method>
		<method name="set_navigation_layer_value">
			<return type="void" />
			<argument index="0" name="layer_number" type="int" />
			<argument index="1" name="value" type="bool" />
			<description>
				Based on [code]value[/code], enables or disables the specified layer in the [member navigation_layers] bitmask, given a [code]layer_number[/code] between 1 and 32.
			</description>
		</method>
		<method name="set_navigation_map">
			<return type="void" />
			<argument index="0" name="navigation_map" type="RID" />
			<description>
				Sets the [RID] of the navigation map this region should use. By default the region will automatically join the [World2D] default navigation map so this function is only required to override the default map.
			</description>
		</method>
	</methods>
	<members>
		<member name="avoidance_layers" type="int" setter="set_avoidance_layers" getter="get_avoidance_layers" default="1">
			A bitfield determining all avoidance layers for the avoidance constrain.
		</member>
		<member name="constrain_avoidance" type="bool" setter="set_constrain_avoidance" getter="get_constrain_avoidance" default="false">
			If [code]true[/code] constraints avoidance agent's with an avoidance mask bit that matches with a bit of the [member avoidance_layers] to the navigation polygon. Due to each navigation polygon outline creating an obstacle and each polygon edge creating an avoidance line constrain keep the navigation polygon shape as simple as possible for performance.
			[b]Experimental:[/b] This is an experimental feature and should not be used in production as agent's can get stuck on the navigation polygon corners and edges especially at high frame rate.
		</member>
		<member name="enabled" type="bool" setter="set_enabled" getter="is_enabled" default="true">
			Determines if the [NavigationPolygonInstance] is enabled or disabled.
		</member>
		<member name="enter_cost" type="float" setter="set_enter_cost" getter="get_enter_cost" default="0.0">
			When pathfinding enters this regions navigation mesh from another regions navigation mesh the [code]enter_cost[/code] value is added to the path distance for determining the shortest path.
		</member>
		<member name="navigation_layers" type="int" setter="set_navigation_layers" getter="get_navigation_layers" default="1">
			A bitfield determining all navigation map layers the [NavigationPolygon] belongs to. On path requests with [method Navigation2DServer.map_get_path] navigation meshes without matching layers will be ignored and the navigation map will only proximity merge different navigation meshes with matching layers.
		</member>
		<member name="navigation_polygon" type="NavigationPolygon" setter="set_navigation_polygon" getter="get_navigation_polygon">
			The [NavigationPolygon] resource to use.
		</member>
		<member name="travel_cost" type="float" setter="set_travel_cost" getter="get_travel_cost" default="1.0">
			When pathfinding moves inside this regions navigation mesh the traveled distances are multiplied with [code]travel_cost[/code] for determining the shortest path.
		</member>
		<member name="use_edge_connections" type="bool" setter="set_use_edge_connections" getter="get_use_edge_connections" default="true">
			If enabled the navigation region will use edge connections to connect with other navigation regions within proximity of the navigation map edge connection margin.
		</member>
	</members>
	<signals>
		<signal name="bake_finished">
			<description>
				Emitted when a navigation polygon bake operation is completed.
			</description>
		</signal>
		<signal name="navigation_polygon_changed">
			<description>
				Emitted when the used navigation polygon is replaced or changes to the internals of the current navigation polygon are committed.
			</description>
		</signal>
	</signals>
	<constants>
	</constants>
</class>
