Let shopkeepers roam safely around their shops

tests/generated_world_runtime_validation.gd

@@ -12,6 +12,9 @@ const GeneratedLakePool: FishPool = preload(
 const GeneratedRiverPool: FishPool = preload(
 	"res://fish/pools/generated_river_pool.tres"
 )
+const FishingSurfaceResolverType = preload(
+	"res://fishing/fishing_surface_resolver.gd"
+)
 const Gatherables: GatherableCatalog = preload(
 	"res://gathering/catalog/gatherable_catalog.tres"
 )
@@ -415,13 +418,51 @@ func _validate_generated_region(
 
 	var shop := region.get_node("Interactables/FishingShopWorld") as Node3D
 	var storage := region.get_node("Interactables/PlayerStorageBox") as Node3D
+	var decor_shop := region.get_node(
+		"Interactables/DecorShopWorld"
+	) as Node3D
+	var rv_upgrade_shop := region.get_node(
+		"Interactables/RVUpgradeShopWorld"
+	) as Node3D
 	assert(shop != null and shop.has_node("Shopkeeper"))
 	assert(storage != null and storage.has_node("InteractionArea"))
+	assert(decor_shop != null and decor_shop.has_node("Shopkeeper"))
+	assert(rv_upgrade_shop != null and rv_upgrade_shop.has_node("Shopkeeper"))
+	for shop_root: Node3D in [shop, decor_shop, rv_upgrade_shop]:
+		var interaction := shop_root.get_node(
+			"InteractionArea"
+		) as FishingShopInteraction
+		var interaction_shape := shop_root.get_node(
+			"InteractionArea/InteractionShape"
+		) as CollisionShape3D
+		var sphere := interaction_shape.shape as SphereShape3D
+		assert(sphere != null and is_equal_approx(sphere.radius, 1.5))
+		assert(interaction != null)
+		assert(interaction.roaming_radius >= 2.75)
+		assert(interaction.minimum_route_distance >= 1.25)
+		assert(is_equal_approx(interaction.local_interaction_reach, 1.5))
+		assert(
+			is_equal_approx(
+				interaction.get_authority_interaction_radius(),
+				interaction.roaming_radius + interaction.local_interaction_reach,
+			)
+		)
 	var spawn_chunk_center := generator.chunk_position(center)
 	var shop_offset := shop.position - spawn_chunk_center
 	var storage_offset := storage.position - spawn_chunk_center
 	assert(absf(shop_offset.x) < 5.0 and absf(shop_offset.z) < 5.0)
 	assert(absf(storage_offset.x) < 5.0 and absf(storage_offset.z) < 5.0)
+	for pair: Array in [
+		[shop, decor_shop],
+		[shop, rv_upgrade_shop],
+		[decor_shop, rv_upgrade_shop],
+	]:
+		var first_shop := pair[0] as Node3D
+		var second_shop := pair[1] as Node3D
+		assert(
+			first_shop.position.distance_to(second_shop.position)
+			>= GeneratedWorldRegion.SHOPKEEPER_MINIMUM_SEPARATION - 0.001
+		)
 	assert(region.get_fishing_shop() != null)
 	assert(region.get_player_storage() != null)
 	assert(region.get_player_spawn_transform().origin.y > 0.0)
@@ -468,6 +509,8 @@ func _validate_generated_region(
 		== 20 + river_placement_count
 	)
 	var river_body_count := 0
+	var surface_resolver := FishingSurfaceResolverType.new()
+	var space_state := region.get_world_3d().direct_space_state
 	for child: Node in fresh_root.get_children():
 		var fresh := child as WaterBodyAuthoring
 		assert(fresh != null)
@@ -527,7 +570,44 @@ func _validate_generated_region(
 		else:
 			assert(&"pond" in fresh.location_tags)
 			assert(fresh.fish_pool == GeneratedPondPool)
+		# Generated fresh water shares the ocean's visible plane. Confirm that
+		# every habitat collider wins at runtime rather than merely checking the
+		# resource assigned to an otherwise-unused body.
+		var probe_position := fresh.global_position
+		if fresh.surface_polygon.size() >= 3:
+			var probe_indices := Geometry2D.triangulate_polygon(
+				fresh.surface_polygon,
+			)
+			assert(probe_indices.size() >= 3)
+			var probe_local := Vector2.ZERO
+			for probe_offset: int in 3:
+				probe_local += fresh.surface_polygon[
+					probe_indices[probe_offset]
+				]
+			probe_local /= 3.0
+			probe_position = fresh.to_global(Vector3(
+				probe_local.x,
+				0.0,
+				probe_local.y,
+			))
+		var selected_region: FishableWaterRegion = surface_resolver.call(
+			"_find_highest_water_region",
+			space_state,
+			probe_position,
+			probe_position.y + 100.0,
+			probe_position.y - 100.0,
+		)
+		assert(selected_region == fresh.get_node("FishingRegion"))
+		assert(selected_region.fish_pool == fresh.fish_pool)
 	assert(river_body_count == river_placement_count)
+	var resolved_ocean := surface_resolver.resolve_surface(
+		space_state,
+		Vector3(1000.0, GeneratedWorldRegion.WATER_HEIGHT, 1000.0),
+		GeneratedWorldRegion.WATER_HEIGHT + 2.0,
+	)
+	assert(resolved_ocean.is_fishable())
+	assert(resolved_ocean.water_region == ocean.get_node("FishingRegion"))
+	assert(resolved_ocean.water_region.water_type == WaterType.Type.SALT_WATER)
 
 	_validate_authored_chunk_surfaces(region, generator)
 	_validate_projected_terrain_materials(

tests/world_layout_validation.gd

@@ -100,6 +100,7 @@ func _validate_world_switching() -> void:
 	assert(world.get_fishing_shop() != null)
 	assert(world.get_player_storage() != null)
 	assert(not world.get_fishable_water_regions().is_empty())
+	_validate_starter_shopkeeper_roaming(world)
 	var starter_safe_points := world.get_safe_respawn_points()
 	assert(not starter_safe_points.is_empty())
 	var authored_safe_point: SafeRespawnPoint = starter_safe_points.back()
@@ -117,6 +118,44 @@ func _validate_world_switching() -> void:
 	await process_frame
 
 
+func _validate_starter_shopkeeper_roaming(world: TestWorld) -> void:
+	var starter_region := world.get_node(
+		"Regions/StarterIslandRegion"
+	) as StarterIslandRegion
+	assert(starter_region != null)
+	for interaction: FishingShopInteraction in [
+		starter_region.get_fishing_shop(),
+		starter_region.get_decor_shop(),
+		starter_region.get_rv_upgrade_shop(),
+	]:
+		assert(interaction != null)
+		# Presentation patrols are inactive on a dedicated/headless world until a
+		# local player is bound, so they cannot spend physics-query budget there.
+		assert(
+			not interaction.is_processing()
+			and not interaction.is_physics_processing()
+		)
+		var visual := interaction.get_node("../Shopkeeper") as Node3D
+		var visual_transform := visual.transform
+		var fixed_area_transform := interaction.global_transform
+		var route_found := false
+		for _attempt_cycle: int in 4:
+			interaction.call("_choose_roaming_destination")
+			if interaction.is_roaming_walking():
+				route_found = true
+				break
+		assert(route_found)
+		assert(not (interaction.get("_roaming_route") as Array).is_empty())
+		for _movement_slice: int in 24:
+			interaction.call("_advance_roaming_walk", 0.05)
+			if visual.position.distance_to(visual_transform.origin) > 0.01:
+				break
+		assert(visual.position.distance_to(visual_transform.origin) > 0.01)
+		assert(interaction.global_transform.is_equal_approx(fixed_area_transform))
+		visual.transform = visual_transform
+		interaction.call("_schedule_idle")
+
+
 func _validate_world_boundary_clearance(world: TestWorld) -> void:
 	var active_region := world.get("_active_region") as WorldRegion
 	assert(active_region != null)

world/fishing_shop_interaction.gd

@@ -6,27 +6,82 @@ signal local_player_range_changed(in_range: bool)
 const DIALOGUE_TEXT: String = (
 	"Listen, you may suck at fishing but I've got some things that might help."
 )
+const TERRAIN_COLLISION_MASK: int = 1
+const WATER_COLLISION_MASK: int = 4 | 8
+const SHOPKEEPER_INTERACTION_GROUP: StringName = &"shopkeeper_interactions"
+const ROAMING_ORIGIN_META: StringName = &"shopkeeper_roaming_origin"
 
 @export_node_path("Node3D") var look_character_path: NodePath = ^"../Shopkeeper"
+@export_category("Shopkeeper Roaming")
+@export var roaming_enabled: bool = true
+@export_range(0.1, 5.0, 0.05, "suffix:m") var roaming_radius: float = 2.8
+@export_range(0.1, 4.0, 0.05, "suffix:m") var minimum_route_distance: float = 1.5
+@export_range(0.1, 5.0, 0.05, "suffix:m") var maximum_route_distance: float = 2.35
+@export_range(0.1, 2.0, 0.05, "suffix:m/s") var roaming_speed: float = 0.55
+@export_range(0.1, 10.0, 0.1, "suffix:s") var minimum_idle_seconds: float = 2.0
+@export_range(0.1, 15.0, 0.1, "suffix:s") var maximum_idle_seconds: float = 5.0
+@export_range(90.0, 1080.0, 15.0, "degrees/s") var turn_speed_degrees: float = 600.0
+@export_category("Shopkeeper Route Safety")
+@export_range(0.1, 1.0, 0.05, "suffix:m") var route_sample_spacing: float = 0.45
+@export_range(0.0, 1.0, 0.01) var minimum_ground_up_dot: float = 0.78
+@export_range(0.05, 1.0, 0.05, "suffix:m") var maximum_step_height: float = 0.3
+@export_range(0.1, 2.0, 0.05, "suffix:m") var maximum_route_height_change: float = 0.55
+@export_range(0.1, 2.0, 0.05, "suffix:m") var other_shopkeeper_clearance: float = 1.2
+@export_range(0.1, 2.0, 0.05, "suffix:m") var local_player_clearance: float = 0.85
+@export_category("Shopkeeper Interaction")
+@export_range(0.5, 3.0, 0.05, "suffix:m") var local_interaction_reach: float = 1.5
+@export_range(0.5, 5.0, 0.05, "suffix:m") var interaction_height_tolerance: float = 1.25
 
 var _local_player: Player
 var _local_player_in_range: bool = false
 var _look_character: WorldCharacterDisplay
+var _shopkeeper_root: Node3D
+var _roaming_origin: Vector3
+var _roaming_destination: Vector3
+var _roaming_initialized: bool = false
+var _roaming_walking: bool = false
+var _roaming_route: Array[Vector3] = []
+var _roaming_route_index: int = 0
+var _idle_seconds_remaining: float = 0.0
+var _engaged: bool = false
+var _roaming_rng := RandomNumberGenerator.new()
+var _roaming_heading := Vector2.ZERO
+var _yielding_to_priority_key: String = ""
+var _separation_retry_seconds: float = 0.0
 
 
 func _ready() -> void:
 	_look_character = get_node_or_null(
 		look_character_path
 	) as WorldCharacterDisplay
+	# Only the presentation roams. The authoritative interaction Area3D stays at
+	# its authored location so host/client purchase validation never depends on
+	# unsynchronised ambient motion.
+	_shopkeeper_root = _look_character
+	_roaming_rng.seed = hash(get_path())
+	var initial_heading_angle := _roaming_rng.randf_range(0.0, TAU)
+	_roaming_heading = Vector2(
+		cos(initial_heading_angle),
+		sin(initial_heading_angle),
+	)
+	_initialize_roaming_origin()
+	add_to_group(SHOPKEEPER_INTERACTION_GROUP)
 	body_entered.connect(_on_body_entered)
 	body_exited.connect(_on_body_exited)
+	set_process(false)
+	set_physics_process(false)
 
 
 func setup_local_player(player: Player) -> void:
 	_local_player = player
 	if _look_character != null:
 		_look_character.set_head_look_target(player)
-	_refresh_overlaps()
+	_initialize_roaming_origin()
+	_schedule_idle()
+	# Local eligibility follows the moving presentation even when roaming is
+	# disabled at runtime, so the authored Area3D is never treated as its proxy.
+	set_physics_process(true)
+	_refresh_local_player_proximity()
 
 
 func is_local_player_in_range() -> bool:
@@ -34,45 +89,807 @@ func is_local_player_in_range() -> bool:
 
 
 func is_avatar_in_range(avatar: Player) -> bool:
+	if avatar == null or not is_instance_valid(avatar):
+		return false
+	var offset := avatar.global_position - _get_roaming_origin_global()
+	var vertical_distance := absf(offset.y)
+	offset.y = 0.0
+	# Ambient presentation motion is intentionally local-only. The host cannot
+	# trust an unsynchronised visual position, so purchase authorization uses a
+	# conservative envelope around the fixed authored origin. The Area3D itself
+	# remains fixed and is never enlarged or moved by the patrol.
 	return (
-		avatar != null
-		and is_instance_valid(avatar)
-		and avatar in get_overlapping_bodies()
+		offset.length()
+		<= get_authority_interaction_radius()
+		and vertical_distance <= interaction_height_tolerance
 	)
 
 
+func get_authority_interaction_radius() -> float:
+	return roaming_radius + local_interaction_reach
+
+
 func get_dialogue_text(_home_tier: int = -1) -> String:
 	return DIALOGUE_TEXT
 
 
 func get_prompt_anchor_position() -> Vector3:
 	if _look_character != null:
-		return _look_character.get_head_anchor_position()
+		# Keep the world prompt tied to the stable character root. Bone-driven
+		# anchors bob during walking and make a compact interaction glyph jitter.
+		return _look_character.global_position + Vector3.UP * 2.05
 	return global_position + Vector3.UP * 1.25
 
 
-func _refresh_overlaps() -> void:
-	var is_overlapping: bool = (
-		_local_player != null
-		and is_instance_valid(_local_player)
-		and _local_player in get_overlapping_bodies()
+func set_engaged(engaged: bool) -> void:
+	if _engaged == engaged:
+		return
+	_engaged = engaged
+	_roaming_walking = false
+	_roaming_route.clear()
+	_roaming_route_index = 0
+	_yielding_to_priority_key = ""
+	_separation_retry_seconds = 0.0
+	if _look_character != null:
+		_look_character.set_locomotion_walking(false)
+		_look_character.set_head_look_active(
+			engaged or _local_player_in_range
+		)
+	if not engaged:
+		_schedule_idle()
+
+
+func is_engaged() -> bool:
+	return _engaged
+
+
+func get_shopkeeper_position() -> Vector3:
+	if _look_character != null and is_instance_valid(_look_character):
+		return _look_character.global_position
+	return global_position
+
+
+func _physics_process(delta: float) -> void:
+	_process(delta)
+
+
+# Kept as a separate update entry point so focused runtime validations can
+# advance deterministic slices without waiting on the SceneTree clock.
+func _process(delta: float) -> void:
+	_refresh_local_player_proximity()
+	if _shopkeeper_root == null or not is_instance_valid(_shopkeeper_root):
+		return
+	if _engaged:
+		_face_local_player(delta)
+		return
+	if not roaming_enabled:
+		_set_roaming_walking(false)
+		return
+	if not _roaming_initialized:
+		_initialize_roaming_origin()
+	if _separation_retry_seconds > 0.0:
+		_separation_retry_seconds = maxf(
+			_separation_retry_seconds - delta,
+			0.0,
+		)
+		return
+	if _separate_from_overlapping_shopkeeper(delta):
+		return
+	if _roaming_walking:
+		_advance_roaming_walk(delta)
+		return
+	_idle_seconds_remaining -= delta
+	if _idle_seconds_remaining <= 0.0:
+		_choose_roaming_destination()
+
+
+func get_local_player_distance_squared() -> float:
+	if _local_player == null or not is_instance_valid(_local_player):
+		return INF
+	var character_position: Vector3 = global_position
+	if _look_character != null and is_instance_valid(_look_character):
+		# Use the character root rather than the animated head/prompt anchor so
+		# nearest-shop handoffs stay stable while the NPC idles or looks around.
+		character_position = _look_character.global_position
+	var offset: Vector3 = _local_player.global_position - character_position
+	# Shop selection is about which character the player is standing beside.
+	# A small terrain-height difference must not let a farther NPC win.
+	offset.y = 0.0
+	return offset.length_squared()
+
+
+func _initialize_roaming_origin() -> void:
+	if _shopkeeper_root == null or not is_instance_valid(_shopkeeper_root):
+		return
+	if _roaming_initialized:
+		return
+	# The origin is local to the shop root, so it is safe to capture at _ready()
+	# and survives later generated-world root placement.
+	# Never recapture after a patrol has started: setup can run again when active
+	# world bindings refresh, and turning the current waypoint into a new origin
+	# would let the safety envelope drift indefinitely.
+	if _shopkeeper_root.has_meta(ROAMING_ORIGIN_META):
+		_roaming_origin = _shopkeeper_root.get_meta(
+			ROAMING_ORIGIN_META,
+			_shopkeeper_root.position,
+		) as Vector3
+	else:
+		_roaming_origin = _shopkeeper_root.position
+		_shopkeeper_root.set_meta(ROAMING_ORIGIN_META, _roaming_origin)
+	_roaming_destination = _roaming_origin
+	_roaming_initialized = true
+
+
+func _get_roaming_origin_global() -> Vector3:
+	if (
+		_shopkeeper_root != null
+		and is_instance_valid(_shopkeeper_root)
+		and _shopkeeper_root.get_parent_node_3d() != null
+	):
+		var local_origin := (
+			_roaming_origin
+			if _roaming_initialized
+			else _shopkeeper_root.position
+		)
+		return _shopkeeper_root.get_parent_node_3d().to_global(local_origin)
+	# Area3D is authored one metre above the character's feet.
+	return global_position - Vector3.UP
+
+
+func _schedule_idle() -> void:
+	_set_roaming_walking(false)
+	_roaming_route.clear()
+	_roaming_route_index = 0
+	_yielding_to_priority_key = ""
+	_idle_seconds_remaining = _roaming_rng.randf_range(
+		minf(minimum_idle_seconds, maximum_idle_seconds),
+		maxf(minimum_idle_seconds, maximum_idle_seconds),
+	)
+
+
+func _schedule_route_retry() -> void:
+	_set_roaming_walking(false)
+	_roaming_route.clear()
+	_roaming_route_index = 0
+	_idle_seconds_remaining = _roaming_rng.randf_range(0.35, 0.8)
+
+
+func _choose_roaming_destination() -> void:
+	if _shopkeeper_root == null or not is_instance_valid(_shopkeeper_root):
+		return
+	var current := _shopkeeper_root.position
+	var current_2d := Vector2(current.x, current.z)
+	var origin_2d := Vector2(_roaming_origin.x, _roaming_origin.z)
+	var origin_offset := current_2d - origin_2d
+	var safe_radius := maxf(roaming_radius, 0.1)
+	var requested_minimum := minf(
+		minimum_route_distance,
+		safe_radius * 0.8,
+	)
+	var requested_maximum := maxf(
+		requested_minimum,
+		minf(maximum_route_distance, safe_radius * 1.25),
+	)
+	var base_heading := _roaming_heading.normalized()
+	if base_heading.is_zero_approx():
+		var fallback_angle := _roaming_rng.randf_range(0.0, TAU)
+		base_heading = Vector2(cos(fallback_angle), sin(fallback_angle))
+	# This is a correlated random walk: most legs continue in roughly the same
+	# direction from the NPC's CURRENT position. Only near the safety boundary
+	# does it gradually steer back inward. The authored origin is a fence, not a
+	# behavioral target, so the result reads as exploring instead of orbiting.
+	var boundary_ratio := clampf(origin_offset.length() / safe_radius, 0.0, 1.0)
+	if boundary_ratio > 0.68 and not origin_offset.is_zero_approx():
+		var inward := -origin_offset.normalized()
+		var inward_weight := remap(boundary_ratio, 0.68, 1.0, 0.15, 0.82)
+		base_heading = base_heading.lerp(inward, inward_weight).normalized()
+	# Route selection is intentionally capped: even a completely blocked patch
+	# cannot turn an ambient idle transition into a large one-frame query spike.
+	for attempt: int in 4:
+		var turn_limit := deg_to_rad(38.0 + minf(float(attempt), 8.0) * 6.0)
+		var candidate_heading := base_heading.rotated(
+			_roaming_rng.randf_range(-turn_limit, turn_limit)
+		).normalized()
+		var route_distance := _roaming_rng.randf_range(
+			requested_minimum,
+			requested_maximum,
+		)
+		var candidate_2d := current_2d + candidate_heading * route_distance
+		var candidate_from_origin := candidate_2d - origin_2d
+		if candidate_from_origin.length() > safe_radius:
+			continue
+		var candidate := Vector3(candidate_2d.x, current.y, candidate_2d.y)
+		var safe_destination := _resolve_safe_route_destination(candidate)
+		if safe_destination.is_empty():
+			continue
+		_roaming_destination = safe_destination["position"] as Vector3
+		_roaming_route.clear()
+		for waypoint: Vector3 in safe_destination.get("waypoints", []):
+			_roaming_route.append(waypoint)
+		_roaming_route_index = 0
+		_yielding_to_priority_key = ""
+		var accepted_offset := _roaming_destination - current
+		_roaming_heading = Vector2(
+			accepted_offset.x,
+			accepted_offset.z,
+		).normalized()
+		_set_roaming_walking(true)
+		return
+	# Staying put is preferable to walking through a tree, over a cliff, or into
+	# water. Spread retries across frames so a boxed-in NPC cannot spend hundreds
+	# of physics queries in one idle transition on a low-end device.
+	_schedule_route_retry()
+
+
+func _resolve_safe_route_destination(candidate: Vector3) -> Dictionary:
+	if (
+		_shopkeeper_root == null
+		or not is_instance_valid(_shopkeeper_root)
+		or not is_inside_tree()
+	):
+		return {}
+	var parent := _shopkeeper_root.get_parent_node_3d()
+	if parent == null or get_world_3d() == null:
+		return {}
+	var current_world := _shopkeeper_root.global_position
+	var candidate_world := parent.to_global(candidate)
+	var horizontal_route := candidate_world - current_world
+	horizontal_route.y = 0.0
+	var route_length := horizontal_route.length()
+	if route_length < maxf(minimum_route_distance, 0.05):
+		return {}
+	if _route_conflicts_with_reserved_corridors(current_world, candidate_world):
+		return {}
+	var sample_count := maxi(
+		2,
+		ceili(route_length / maxf(route_sample_spacing, 0.1)),
+	)
+	var first_ground := _probe_walkable_ground(current_world, current_world.y)
+	if first_ground.is_empty():
+		return {}
+	var first_position := first_ground["position"] as Vector3
+	var previous_position := first_position
+	var waypoints: Array[Vector3] = []
+	for sample_index: int in range(1, sample_count + 1):
+		var progress := float(sample_index) / float(sample_count)
+		var sample_horizontal := current_world.lerp(candidate_world, progress)
+		sample_horizontal.y = previous_position.y
+		var ground := _probe_walkable_ground(
+			sample_horizontal,
+			previous_position.y,
+		)
+		if ground.is_empty():
+			return {}
+		var ground_position := ground["position"] as Vector3
+		if (
+			absf(ground_position.y - previous_position.y)
+			> maximum_step_height
+			or absf(ground_position.y - first_position.y)
+			> maximum_route_height_change
+			or _segment_has_obstacle(previous_position, ground_position)
+			or _is_too_close_to_other_shopkeeper(ground_position)
+		):
+			return {}
+		previous_position = ground_position
+		waypoints.append(parent.to_local(ground_position))
+	return {
+		"position": parent.to_local(previous_position),
+		"waypoints": waypoints,
+	}
+
+
+func _probe_walkable_ground(
+	world_position: Vector3,
+	reference_height: float,
+) -> Dictionary:
+	var space_state := get_world_3d().direct_space_state
+	var ray_start := Vector3(
+		world_position.x,
+		reference_height + 1.75,
+		world_position.z,
+	)
+	var ray_end := Vector3(
+		world_position.x,
+		reference_height - 2.5,
+		world_position.z,
+	)
+	var query := PhysicsRayQueryParameters3D.create(
+		ray_start,
+		ray_end,
+		TERRAIN_COLLISION_MASK,
+	)
+	query.collide_with_areas = false
+	query.collide_with_bodies = true
+	var result := space_state.intersect_ray(query)
+	if result.is_empty():
+		return {}
+	var normal := result.get("normal", Vector3.ZERO) as Vector3
+	if normal.dot(Vector3.UP) < minimum_ground_up_dot:
+		return {}
+	var ground_position := result.get("position", world_position) as Vector3
+	if _is_water_position(ground_position + Vector3.UP * 0.15):
+		return {}
+	return {
+		"position": ground_position,
+		"normal": normal,
+	}
+
+
+func _segment_has_obstacle(from_ground: Vector3, to_ground: Vector3) -> bool:
+	var route := to_ground - from_ground
+	var horizontal := Vector3(route.x, 0.0, route.z)
+	if horizontal.length_squared() <= 0.000001:
+		return false
+	var side := Vector3.UP.cross(horizontal.normalized()) * 0.22
+	var space_state := get_world_3d().direct_space_state
+	for side_offset: Vector3 in [-side, Vector3.ZERO, side]:
+		var query := PhysicsRayQueryParameters3D.create(
+			from_ground + side_offset + Vector3.UP * 0.55,
+			to_ground + side_offset + Vector3.UP * 0.55,
+			TERRAIN_COLLISION_MASK,
+		)
+		query.collide_with_areas = false
+		query.collide_with_bodies = true
+		if not space_state.intersect_ray(query).is_empty():
+			return true
+	return false
+
+
+func _is_water_position(world_position: Vector3) -> bool:
+	var query := PhysicsPointQueryParameters3D.new()
+	query.position = world_position
+	query.collision_mask = WATER_COLLISION_MASK
+	query.collide_with_areas = true
+	query.collide_with_bodies = false
+	return not get_world_3d().direct_space_state.intersect_point(
+		query,
+		8,
+	).is_empty()
+
+
+func _is_too_close_to_other_shopkeeper(world_position: Vector3) -> bool:
+	if other_shopkeeper_clearance <= 0.0:
+		return false
+	var minimum_distance_squared := other_shopkeeper_clearance * other_shopkeeper_clearance
+	for node: Node in get_tree().get_nodes_in_group(
+		SHOPKEEPER_INTERACTION_GROUP
+	):
+		var other := node as FishingShopInteraction
+		if other == null or other == self or not is_instance_valid(other):
+			continue
+		var offset := other.get_shopkeeper_position() - world_position
+		offset.y = 0.0
+		if offset.length_squared() < minimum_distance_squared:
+			return true
+	return false
+
+
+func _route_conflicts_with_reserved_corridors(
+	from_world: Vector3,
+	to_world: Vector3,
+) -> bool:
+	var from_2d := Vector2(from_world.x, from_world.z)
+	var to_2d := Vector2(to_world.x, to_world.z)
+	var npc_clearance_squared := (
+		other_shopkeeper_clearance * other_shopkeeper_clearance
+	)
+	for node: Node in get_tree().get_nodes_in_group(
+		SHOPKEEPER_INTERACTION_GROUP
+	):
+		var other := node as FishingShopInteraction
+		if other == null or other == self or not is_instance_valid(other):
+			continue
+		var other_from_world := other.get_shopkeeper_position()
+		var other_to_world := other.get_roaming_destination_global()
+		var other_from := Vector2(other_from_world.x, other_from_world.z)
+		var other_to := Vector2(other_to_world.x, other_to_world.z)
+		if not other.is_roaming_walking():
+			other_to = other_from
+		if (
+			_segment_distance_squared(from_2d, to_2d, other_from, other_to)
+			< npc_clearance_squared
+		):
+			return true
+	if _local_player != null and is_instance_valid(_local_player):
+		var player_position := Vector2(
+			_local_player.global_position.x,
+			_local_player.global_position.z,
+		)
+		if (
+			_point_segment_distance_squared(player_position, from_2d, to_2d)
+			< local_player_clearance * local_player_clearance
+		):
+			return true
+	return false
+
+
+func _segment_distance_squared(
+	first_start: Vector2,
+	first_end: Vector2,
+	second_start: Vector2,
+	second_end: Vector2,
+) -> float:
+	if Geometry2D.segment_intersects_segment(
+		first_start,
+		first_end,
+		second_start,
+		second_end,
+	) != null:
+		return 0.0
+	return minf(
+		minf(
+			_point_segment_distance_squared(
+				first_start,
+				second_start,
+				second_end,
+			),
+			_point_segment_distance_squared(
+				first_end,
+				second_start,
+				second_end,
+			),
+		),
+		minf(
+			_point_segment_distance_squared(
+				second_start,
+				first_start,
+				first_end,
+			),
+			_point_segment_distance_squared(
+				second_end,
+				first_start,
+				first_end,
+			),
+		),
+	)
+
+
+func _point_segment_distance_squared(
+	point: Vector2,
+	segment_start: Vector2,
+	segment_end: Vector2,
+) -> float:
+	var segment := segment_end - segment_start
+	var segment_length_squared := segment.length_squared()
+	if segment_length_squared <= 0.000001:
+		return point.distance_squared_to(segment_start)
+	var progress := clampf(
+		(point - segment_start).dot(segment) / segment_length_squared,
+		0.0,
+		1.0,
+	)
+	return point.distance_squared_to(segment_start + segment * progress)
+
+
+func get_roaming_destination_global() -> Vector3:
+	if (
+		_shopkeeper_root != null
+		and is_instance_valid(_shopkeeper_root)
+		and _shopkeeper_root.get_parent_node_3d() != null
+	):
+		return _shopkeeper_root.get_parent_node_3d().to_global(
+			_roaming_destination
+		)
+	return get_shopkeeper_position()
+
+
+func is_roaming_walking() -> bool:
+	return _roaming_walking
+
+
+func _advance_roaming_walk(delta: float) -> void:
+	if _separate_from_overlapping_shopkeeper(delta):
+		return
+	if _roaming_route_index >= _roaming_route.size():
+		_schedule_route_retry()
+		return
+	var route_target := _roaming_route[_roaming_route_index]
+	var offset := route_target - _shopkeeper_root.position
+	if offset.length_squared() <= 0.0025:
+		_shopkeeper_root.position = route_target
+		_roaming_route_index += 1
+		if _roaming_route_index >= _roaming_route.size():
+			_shopkeeper_root.position = _roaming_destination
+			_schedule_idle()
+		return
+	var horizontal_offset := offset
+	horizontal_offset.y = 0.0
+	if horizontal_offset.length_squared() <= 0.000001:
+		_shopkeeper_root.position = _shopkeeper_root.position.move_toward(
+			route_target,
+			roaming_speed * delta,
+		)
+		return
+	if _should_yield_for_live_traffic(route_target, delta):
+		return
+	_turn_root_toward(
+		_shopkeeper_root.get_parent_node_3d().to_global(route_target),
+		delta,
+	)
+	var local_forward := _shopkeeper_root.basis.z.normalized()
+	var travel_direction := horizontal_offset.normalized()
+	var facing_alignment := local_forward.dot(travel_direction)
+	# Turn in place briefly rather than skating sideways while the body catches
+	# up to a newly selected patrol leg.
+	if facing_alignment < cos(deg_to_rad(10.0)):
+		if _look_character != null:
+			_look_character.set_locomotion_walking(false)
+		return
+	if _look_character != null:
+		_look_character.set_locomotion_walking(true)
+	_shopkeeper_root.position = _shopkeeper_root.position.move_toward(
+		route_target,
+		roaming_speed * delta,
+	)
+
+
+func _separate_from_overlapping_shopkeeper(delta: float) -> bool:
+	var current_world := get_shopkeeper_position()
+	var nearest: FishingShopInteraction
+	var nearest_offset := Vector3.ZERO
+	var nearest_distance_squared := INF
+	var clearance_squared := (
+		other_shopkeeper_clearance * other_shopkeeper_clearance
+	)
+	for node: Node in get_tree().get_nodes_in_group(
+		SHOPKEEPER_INTERACTION_GROUP
+	):
+		var other := node as FishingShopInteraction
+		if other == null or other == self or not is_instance_valid(other):
+			continue
+		var offset := current_world - other.get_shopkeeper_position()
+		offset.y = 0.0
+		var distance_squared := offset.length_squared()
+		if (
+			distance_squared < clearance_squared
+			and distance_squared < nearest_distance_squared
+		):
+			nearest = other
+			nearest_offset = offset
+			nearest_distance_squared = distance_squared
+	if nearest == null:
+		return false
+	var away := nearest_offset.normalized()
+	if away.is_zero_approx():
+		# Exact overlaps use opposite deterministic axes, so both characters move
+		# apart instead of choosing the same random escape direction.
+		away = (
+			Vector3.RIGHT
+			if _traffic_priority_key() < nearest._traffic_priority_key()
+			else Vector3.LEFT
+		)
+	var turn_sign := (
+		1.0
+		if _traffic_priority_key() < nearest._traffic_priority_key()
+		else -1.0
+	)
+	var inward := _get_roaming_origin_global() - current_world
+	inward.y = 0.0
+	var escape_directions: Array[Vector3] = [
+		away,
+		away.rotated(Vector3.UP, turn_sign * PI * 0.25),
+		away.rotated(Vector3.UP, turn_sign * PI * 0.5),
+	]
+	if not inward.is_zero_approx():
+		escape_directions.append(inward.normalized())
+		escape_directions.append(
+			inward.normalized().rotated(
+				Vector3.UP,
+				turn_sign * PI * 0.25,
+			)
+		)
+	for escape_direction: Vector3 in escape_directions:
+		if _try_live_separation_step(escape_direction, delta):
+			_separation_retry_seconds = 0.0
+			return true
+	# If terrain or props block every deterministic escape, avoid repeating the
+	# same raycast set every physics frame. Another NPC can still move clear while
+	# this one pauses, then normal route planning resumes after the short cooldown.
+	_separation_retry_seconds = 0.25
+	return true
+
+
+func _try_live_separation_step(world_direction: Vector3, delta: float) -> bool:
+	var parent := _shopkeeper_root.get_parent_node_3d()
+	if parent == null:
+		return false
+	var direction := world_direction
+	direction.y = 0.0
+	direction = direction.normalized()
+	if direction.is_zero_approx():
+		return false
+	var current_world := _shopkeeper_root.global_position
+	var candidate_world := (
+		current_world + direction * roaming_speed * maxf(delta, 0.001)
+	)
+	var origin_offset := candidate_world - _get_roaming_origin_global()
+	origin_offset.y = 0.0
+	if origin_offset.length() > roaming_radius:
+		return false
+	var ground := _probe_walkable_ground(candidate_world, current_world.y)
+	if ground.is_empty():
+		return false
+	var ground_position := ground["position"] as Vector3
+	if (
+		absf(ground_position.y - current_world.y) > maximum_step_height
+		or _segment_has_obstacle(current_world, ground_position)
+	):
+		return false
+	_roaming_route.clear()
+	_roaming_route_index = 0
+	_roaming_destination = parent.to_local(
+		ground_position + direction * other_shopkeeper_clearance
+	)
+	_roaming_walking = true
+	_yielding_to_priority_key = ""
+	_turn_root_toward(ground_position + direction, delta)
+	var local_direction := parent.global_basis.inverse() * direction
+	local_direction.y = 0.0
+	local_direction = local_direction.normalized()
+	if (
+		_shopkeeper_root.basis.z.normalized().dot(local_direction)
+		< cos(deg_to_rad(12.0))
+	):
+		if _look_character != null:
+			_look_character.set_locomotion_walking(false)
+		return true
+	if _look_character != null:
+		_look_character.set_locomotion_walking(true)
+	_shopkeeper_root.global_position = ground_position
+	return true
+
+
+func _should_yield_for_live_traffic(
+	local_target: Vector3,
+	delta: float,
+) -> bool:
+	var current_world := get_shopkeeper_position()
+	var target_world := _shopkeeper_root.get_parent_node_3d().to_global(
+		local_target
+	)
+	var proposed_world := current_world.move_toward(
+		target_world,
+		roaming_speed * maxf(delta, 0.001),
+	)
+	var current_2d := Vector2(current_world.x, current_world.z)
+	var proposed_2d := Vector2(proposed_world.x, proposed_world.z)
+	var clearance_squared := (
+		other_shopkeeper_clearance * other_shopkeeper_clearance
+	)
+	for node: Node in get_tree().get_nodes_in_group(
+		SHOPKEEPER_INTERACTION_GROUP
+	):
+		var other := node as FishingShopInteraction
+		if other == null or other == self or not is_instance_valid(other):
+			continue
+		if other._yielding_to_priority_key == _traffic_priority_key():
+			continue
+		var other_current_world := other.get_shopkeeper_position()
+		var other_target_world := other.get_next_roaming_target_global()
+		var other_current := Vector2(
+			other_current_world.x,
+			other_current_world.z,
+		)
+		var other_target := Vector2(
+			other_target_world.x,
+			other_target_world.z,
+		)
+		if not other.is_roaming_walking():
+			other_target = other_current
+		if (
+			_segment_distance_squared(
+				current_2d,
+				proposed_2d,
+				other_current,
+				other_target,
+			) >= clearance_squared
+		):
+			continue
+		if (
+			other.is_roaming_walking()
+			and _traffic_priority_key() < other._traffic_priority_key()
+		):
+			continue
+		_yielding_to_priority_key = other._traffic_priority_key()
+		_schedule_route_retry()
+		return true
+	if _local_player != null and is_instance_valid(_local_player):
+		var player_2d := Vector2(
+			_local_player.global_position.x,
+			_local_player.global_position.z,
+		)
+		if (
+			_point_segment_distance_squared(
+				player_2d,
+				current_2d,
+				proposed_2d,
+			) < local_player_clearance * local_player_clearance
+		):
+			_yielding_to_priority_key = ""
+			_schedule_route_retry()
+			return true
+	return false
+
+
+func get_next_roaming_target_global() -> Vector3:
+	if (
+		_shopkeeper_root != null
+		and is_instance_valid(_shopkeeper_root)
+		and _shopkeeper_root.get_parent_node_3d() != null
+		and _roaming_route_index < _roaming_route.size()
+	):
+		return _shopkeeper_root.get_parent_node_3d().to_global(
+			_roaming_route[_roaming_route_index]
+		)
+	return get_roaming_destination_global()
+
+
+func _traffic_priority_key() -> String:
+	return str(get_path())
+
+
+func _set_roaming_walking(walking: bool) -> void:
+	if _roaming_walking == walking:
+		return
+	_roaming_walking = walking
+	if _look_character != null:
+		# A new patrol leg starts with a short idle turn-in-place. Translation
+		# switches to walking once the body is within ten degrees of its route.
+		_look_character.set_locomotion_walking(false)
+
+
+func _face_local_player(delta: float) -> void:
+	if _local_player == null or not is_instance_valid(_local_player):
+		return
+	var target := _local_player.global_position
+	if _shopkeeper_root != null and is_instance_valid(_shopkeeper_root):
+		target.y = _shopkeeper_root.global_position.y
+		_turn_root_toward(target, delta)
+
+
+func _turn_root_toward(world_target: Vector3, delta: float) -> void:
+	if _shopkeeper_root == null or not is_instance_valid(_shopkeeper_root):
+		return
+	var local_target := _shopkeeper_root.get_parent_node_3d().to_local(
+		world_target
+	)
+	var direction := local_target - _shopkeeper_root.position
+	direction.y = 0.0
+	if direction.length_squared() <= 0.000001:
+		return
+	# The imported standalone character faces local +Z (unlike Player's
+	# additional 180-degree rig wrapper).
+	var target_yaw := atan2(direction.x, direction.z)
+	_shopkeeper_root.rotation.y = rotate_toward(
+		_shopkeeper_root.rotation.y,
+		target_yaw,
+		deg_to_rad(turn_speed_degrees) * delta,
+	)
+
+
+func _refresh_local_player_proximity() -> void:
+	if _local_player == null or not is_instance_valid(_local_player):
+		_set_local_player_in_range(false)
+		return
+	var offset := _local_player.global_position - get_shopkeeper_position()
+	_set_local_player_in_range(
+		offset.length() <= local_interaction_reach
 	)
-	_set_local_player_in_range(is_overlapping)
 
 
 func _on_body_entered(body: Node3D) -> void:
 	if body == _local_player:
-		_set_local_player_in_range(true)
+		_refresh_local_player_proximity()
 
 
 func _on_body_exited(body: Node3D) -> void:
 	if body == _local_player:
-		_set_local_player_in_range(false)
+		_refresh_local_player_proximity()
 
 
 func _set_local_player_in_range(in_range: bool) -> void:
 	if _look_character != null:
-		_look_character.set_head_look_active(in_range)
+		_look_character.set_head_look_active(in_range or _engaged)
 	if _local_player_in_range == in_range:
 		return
 	_local_player_in_range = in_range

world/generation/generated_world_region.gd

@@ -62,6 +62,7 @@ const WATER_RECOVERY_MAXIMUM_INSET := 1.5
 const WATER_RECOVERY_SEARCH_EXPANSIONS: Array[float] = [1.5, 4.0, 12.0]
 const HOME_GROUND_HEIGHT_TOLERANCE := 0.5
 const HOME_ELEVATION_HEIGHT_TOLERANCE := 0.6
+const SHOPKEEPER_MINIMUM_SEPARATION := 3.7
 const PROP_SURFACE_SAMPLE_DIRECTIONS: Array[Vector2] = [
 	Vector2(1.0, 0.0),
 	Vector2(0.70710678, 0.70710678),
@@ -706,13 +707,15 @@ func _assign_biomes(
 func _place_spawn_amenities(center: Vector3) -> void:
 	_player_spawn.position = center + Vector3(0.0, 0.18, 2.2)
 	_safe_spawn.position = _player_spawn.position
-	_shop_root.position = center + Vector3(2.35, 0.0, -1.35)
+	# Keep each shopkeeper in a distinct approach lane. Their compact prompt
+	# areas retain only a narrow seam overlap for a continuous handoff.
+	_shop_root.position = center + Vector3(3.0, 0.0, -2.0)
 	_shop_root.rotation.y = PI
-	_storage_root.position = center + Vector3(-2.4, 0.0, 1.2)
+	_storage_root.position = center + Vector3(-0.5, 0.0, 3.2)
 	_storage_root.rotation.y = PI * 0.5
-	_decor_shop_root.position = center + Vector3(-2.4, 0.0, 1.2)
+	_decor_shop_root.position = center + Vector3(-3.0, 0.0, 1.7)
 	_decor_shop_root.rotation.y = PI * 0.5
-	_rv_upgrade_shop_root.position = center + Vector3(-2.35, 0.0, -1.35)
+	_rv_upgrade_shop_root.position = center + Vector3(-3.0, 0.0, -2.0)
 	_rv_upgrade_shop_root.rotation.y = PI
 
 

world/interactables/decor_shop_world.tscn

@@ -6,7 +6,7 @@
 
 [sub_resource type="SphereShape3D" id="InteractionShape"]
 resource_local_to_scene = true
-radius = 2.1
+radius = 1.5
 
 [node name="DecorShopWorld" type="Node3D"]
 
@@ -26,7 +26,7 @@ autoplay = "idle"
 
 [node name="InteractionArea" type="Area3D" parent="."]
 unique_name_in_owner = true
-position = Vector3(0, 1, -0.3)
+position = Vector3(0, 1, 0)
 collision_layer = 0
 collision_mask = 2
 script = ExtResource("1_shop")

world/interactables/fishing_shop_world.tscn

@@ -6,7 +6,7 @@
 
 [sub_resource type="SphereShape3D" id="InteractionShape"]
 resource_local_to_scene = true
-radius = 2.1
+radius = 1.5
 
 [node name="FishingShopWorld" type="Node3D"]
 
@@ -26,7 +26,7 @@ autoplay = "idle"
 
 [node name="InteractionArea" type="Area3D" parent="."]
 unique_name_in_owner = true
-position = Vector3(0, 1, -0.3)
+position = Vector3(0, 1, 0)
 collision_layer = 0
 collision_mask = 2
 script = ExtResource("1_shop")

world/interactables/rv_upgrade_shop_world.tscn

@@ -6,7 +6,7 @@
 
 [sub_resource type="SphereShape3D" id="InteractionShape"]
 resource_local_to_scene = true
-radius = 2.1
+radius = 1.5
 
 [node name="RVUpgradeShopWorld" type="Node3D"]
 
@@ -26,7 +26,7 @@ autoplay = "idle"
 
 [node name="InteractionArea" type="Area3D" parent="."]
 unique_name_in_owner = true
-position = Vector3(0, 1, -0.3)
+position = Vector3(0, 1, 0)
 collision_layer = 0
 collision_mask = 2
 script = ExtResource("1_shop")

world/regions/starter_island_region.tscn

@@ -292,7 +292,7 @@ transform = Transform3D(-0.9976046, 0, -0.06917416, 0, 1, 0, 0.06917416, 0, -0.9
 position = Vector3(-3.25, 3.42, 11.25)
 
 [node name="DecorShopWorld" parent="Interactables" instance=ExtResource("25_decor_shop")]
-position = Vector3(-3.25, 3.42, 11.25)
+position = Vector3(-3.15, 3.42, 11.25)
 rotation = Vector3(0, 1.5707964, 0)
 
 [node name="RVUpgradeShopWorld" parent="Interactables" instance=ExtResource("26_rv_upgrade")]

world/world_character_display.gd

@@ -50,6 +50,8 @@ var _skeleton: Skeleton3D
 var _look_target: Node3D
 var _look_target_proxy: Node3D
 var _head_look_requested: bool = false
+var _animation_player: AnimationPlayer
+var _locomotion_walking: bool = false
 
 
 func _ready() -> void:
@@ -62,7 +64,9 @@ func _ready() -> void:
 	appearance["nose"] = nose_id
 	appearance["mouth"] = mouth_id
 	PlayerVisualPresenterType.apply_appearance(self, appearance)
+	_animation_player = find_child("AnimationPlayer", true, false) as AnimationPlayer
 	_prepare_head_look()
+	_apply_locomotion_animation()
 
 
 func _process(delta: float) -> void:
@@ -93,6 +97,28 @@ func set_head_look_active(active: bool) -> void:
 	_head_look_requested = active
 
 
+func set_locomotion_walking(walking: bool) -> void:
+	if _locomotion_walking == walking:
+		return
+	_locomotion_walking = walking
+	_apply_locomotion_animation()
+
+
+func is_locomotion_walking() -> bool:
+	return _locomotion_walking
+
+
+func _apply_locomotion_animation() -> void:
+	if _animation_player == null:
+		return
+	var requested: StringName = &"walking" if _locomotion_walking else &"idle"
+	if (
+		_animation_player.has_animation(requested)
+		and _animation_player.current_animation != requested
+	):
+		_animation_player.play(requested, 0.18)
+
+
 func get_head_anchor_position() -> Vector3:
 	if _skeleton == null:
 		return global_position + Vector3.UP * 1.8