Grunkbeast spawning & alert response logic

project.godot

@@ -85,6 +85,8 @@ MetalMaterial="This surface is made of metal."
 PlasticMaterial="This surface is made of plastic."
 MeetSpookSource="meet-spook event sources"
 LurkPoint="Point which a lurking beast may wander to."
+BeastSpawnPoint="Spawn point for a grunkbeast"
+GrunkBeast="GrunkBeast instances."
 
 [importer_defaults]
 

src/util/scene_tools.gd

@@ -1,6 +1,8 @@
 class_name SceneTools extends Object
 ## Tools for specialized operations in a scene
 
+const RAY_MASK := 0b00100101
+
 
 ## Get the Node3D in the given group which is spatially closest to the target node.
 ##
@@ -15,3 +17,39 @@ static func closest_in_group(target: Node3D, group_name: String) -> Node3D:
 				min_dist_sq = dist_sq
 				closest = n
 	return closest
+
+
+## Does the player have an unobstructed line-of-sight to the given point?
+static func player_can_see(target: Vector3) -> bool:
+	if not is_instance_valid(Player.instance):
+		return false
+
+	var camera := Player.instance.get_viewport().get_camera_3d()
+
+	if not camera.is_position_in_frustum(target):
+		return false
+
+	var query := PhysicsRayQueryParameters3D.create(camera.global_position, target, RAY_MASK)
+	# TODO may need to add an "exceptions" parameter for the source's body
+	var raycast := Player.instance.get_world_3d().direct_space_state.intersect_ray(query)
+	# If raycast is empty, view is unoccluded and player has line-of-sight!
+	return not raycast
+
+
+## Get a random Node3D from the given group which is not currently visible to the player
+##
+## Returns null is there is no such node, either because the group is empty
+## or the player can see every node in the group.
+static func pick_unseen_from_group(group_name: String) -> Node3D:
+	if not is_instance_valid(Player.instance):
+		return null
+
+	var nodes: Array[Node] = Player.instance.get_tree().get_nodes_in_group(group_name)
+	while nodes:
+		var candidate: Node = nodes.pick_random()
+		nodes.erase(candidate)
+		var target := candidate as Node3D
+		if target and not SceneTools.player_can_see(target.global_position):
+			return target
+
+	return null

src/world/grunk_beast/behaviors/actions/set_player_priority_target.gd

@@ -0,0 +1,16 @@
+@tool
+class_name SetPlayerPriorityTarget extends ActionLeaf
+## Set the player as a pursuit target if the grunk alert level is above a priority threshold.
+
+## Blackboard key to set.
+@export var blackboard_key := "pursuit_target"
+
+## Set the player as target only if the grunk alert level is greater than or equal to this.
+@export var alert_threshold := 3
+
+
+func tick(_actor: Node, blackboard: Blackboard) -> int:
+	if Game.manager.alert_level >= alert_threshold and is_instance_valid(Player.instance):
+		blackboard.set_value(blackboard_key, Player.instance)
+		return SUCCESS
+	return FAILURE

src/world/grunk_beast/behaviors/actions/set_player_priority_target.gd.uid

@@ -0,0 +1 @@
+uid://c5cikaa68tsto

src/world/grunk_beast/grunk_beast.gd

@@ -8,6 +8,10 @@ const STALKING_SOUND_LIMIT := 20.0
 #region Exported Properties
 @export var base_speed := 60.0
 @export var pursuit_speed := 180.0
+
+@export var debug_destroy: bool:
+	set(value):
+		queue_free()
 #endregion
 
 #region Member Variables

src/world/grunk_beast/grunk_beast.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=41 format=3 uid="uid://ehf5sg3ahvbf"]
+[gd_scene load_steps=42 format=3 uid="uid://ehf5sg3ahvbf"]
 
 [ext_resource type="Script" uid="uid://gwwmqwixqqr5" path="res://src/world/grunk_beast/grunk_beast.gd" id="2_qqnhb"]
 [ext_resource type="Shader" uid="uid://ckxc0ngd37rtk" path="res://src/shaders/gunk.gdshader" id="4_0gxpq"]
@@ -19,6 +19,7 @@
 [ext_resource type="Script" uid="uid://dcojdhvj8qcw0" path="res://addons/beehave/nodes/composites/sequence_reactive.gd" id="12_xde72"]
 [ext_resource type="Script" uid="uid://b34l3v4sr8rmq" path="res://src/world/grunk_beast/behaviors/actions/set_target_from_area.gd" id="13_x8l6r"]
 [ext_resource type="Script" uid="uid://om57w2acvgb7" path="res://src/world/grunk_beast/behaviors/actions/travel_to_destination.gd" id="14_4y64f"]
+[ext_resource type="Script" uid="uid://c5cikaa68tsto" path="res://src/world/grunk_beast/behaviors/actions/set_player_priority_target.gd" id="14_csisu"]
 [ext_resource type="Script" uid="uid://bkdwuqv4tudka" path="res://src/world/grunk_beast/behaviors/actions/pursue_target.gd" id="14_x8l6r"]
 [ext_resource type="Script" uid="uid://demv7xh27ouvr" path="res://src/world/grunk_beast/behaviors/actions/blackboard_erase_safe.gd" id="15_4b27i"]
 [ext_resource type="Script" uid="uid://dwfdg523bk776" path="res://addons/beehave/nodes/decorators/failer.gd" id="15_oons1"]
@@ -102,7 +103,7 @@ radius = 3.0
 [sub_resource type="SphereShape3D" id="SphereShape3D_lak6w"]
 radius = 10.0
 
-[node name="GrunkBeast" type="CharacterBody3D"]
+[node name="GrunkBeast" type="CharacterBody3D" groups=["GrunkBeast"]]
 collision_layer = 36
 script = ExtResource("2_qqnhb")
 
@@ -124,6 +125,7 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.5, 0)
 [node name="NavAgent" type="NavigationAgent3D" parent="Navigation"]
 unique_name_in_owner = true
 path_postprocessing = 1
+avoidance_enabled = true
 debug_enabled = true
 
 [node name="NavProbe" type="NavigationAgent3D" parent="Navigation"]
@@ -213,6 +215,10 @@ metadata/_custom_type_script = "uid://dcojdhvj8qcw0"
 script = ExtResource("12_dkcdj")
 metadata/_custom_type_script = "uid://8hn4kne15ac5"
 
+[node name="SetPlayerPriorityTarget" type="Node" parent="GrunkBeastBehavior/StateSelector/PursuitSequence/TargetSelector"]
+script = ExtResource("14_csisu")
+metadata/_custom_type_script = "uid://c5cikaa68tsto"
+
 [node name="TargetInPursuitRange" type="Node" parent="GrunkBeastBehavior/StateSelector/PursuitSequence/TargetSelector" node_paths=PackedStringArray("area")]
 script = ExtResource("9_xuag8")
 blackboard_key = "pursuit_target"

src/world/meet_spook/meet_spook_mob.gd

@@ -3,7 +3,6 @@ class_name MeetSpookMob extends Node3D
 
 enum State { WAITING, FREEZE, MOVING }
 
-const RAY_MASK := 0b00100101
 const BASE_SPEED := 4.0
 
 @export var source: MeetSpook
@@ -41,15 +40,8 @@ func _physics_process(delta: float) -> void:
 	match state:
 		State.WAITING:
 			# Not yet seen by the player
-			if camera.is_position_in_frustum(global_position):
+			if SceneTools.player_can_see(global_position):
-				var query := PhysicsRayQueryParameters3D.create(
+				activate()
-					camera.global_position, global_position, RAY_MASK
-				)
-				# TODO exceptions should include this mob's collision body
-				var raycast := get_world_3d().direct_space_state.intersect_ray(query)
-				if not raycast:
-					# Player has line-of-sight!
-					activate()
 		State.FREEZE:
 			# Just stand there for a sec
 			pass

src/world/spook_manager/spook_manager.gd

@@ -1,6 +1,10 @@
 class_name SpookManager extends Resource
 ## A strategy for handling horror elements through the level.
 
+const SPAWN_GROUP := "BeastSpawnPoint"
+
+@export var grunkbeast_scene: PackedScene
+
 var debug_set_alert_level: int:
 	set = _on_alert_raised
 
@@ -10,6 +14,35 @@ func _init() -> void:
 	Game.manager.alert_cleared.connect(_on_alert_cleared)
 
 
+func _spawn_beast_at_point(spawn_point: Node3D) -> void:
+	print_debug("Spawning active beast at ", spawn_point.global_position)
+	var beast: GrunkBeast = grunkbeast_scene.instantiate()
+	spawn_point.add_child(beast)
+
+
+## Spawn a beast somewhere the player isn't looking.
+func spawn_beast() -> void:
+	var spawn_point := SceneTools.pick_unseen_from_group(SPAWN_GROUP)
+	if not spawn_point:
+		print_debug("Couldn't find a hidden spawn point... Picking one at random.")
+		var nodes := Game.manager.get_tree().get_nodes_in_group(SPAWN_GROUP)
+		if not nodes:
+			print_debug("Oh that's why. There aren't any spawn points. Complain to a developer.")
+			return
+		spawn_point = nodes.pick_random() as Node3D
+
+	_spawn_beast_at_point(spawn_point)
+
+
+## Spawn beasts at _every_ spawn point the player can't see.
+func spawn_many_beasts() -> void:
+	var nodes := Game.manager.get_tree().get_nodes_in_group(SPAWN_GROUP)
+	for node: Node in nodes:
+		var target := node as Node3D
+		if is_instance_valid(target) and not SceneTools.player_can_see(target.global_position):
+			_spawn_beast_at_point(target)
+
+
 func _on_alert_raised(new_level: int) -> void:
 	match new_level:
 		0:
@@ -27,15 +60,16 @@ func _on_alert_raised(new_level: int) -> void:
 		2:
 			# LEVEL 2: AGGRESSIVE
 			# Beast pursues player on sight.
-			pass  # TODO
+			spawn_beast()
 		3:
 			# LEVEL 3: PREDATORY
 			# Beast pursues player relentlessly.
-			pass  # TODO
+			# The logic for this behavior change is handled directly in the GrunkBeast AI.
+			pass
 		4:
 			# LEVEL 4: SWARMING
 			# Many beasts spawn, overwhelming the player.
-			pass  # TODO
+			spawn_many_beasts()
 		5:
 			# LEVEL 5: FUN
 			# Just kill that fool!

src/world/world.tscn

@@ -1,12 +1,14 @@
-[gd_scene load_steps=6 format=3 uid="uid://884jqafhtrv0"]
+[gd_scene load_steps=7 format=3 uid="uid://884jqafhtrv0"]
 
 [ext_resource type="Script" uid="uid://cgqmhtemibxc5" path="res://src/world/world.gd" id="1_1k4gi"]
 [ext_resource type="PackedScene" uid="uid://byvjsvavbg5xe" path="res://src/ui/menus/pause_menu/pause_menu.tscn" id="2_6fy3g"]
+[ext_resource type="PackedScene" uid="uid://ehf5sg3ahvbf" path="res://src/world/grunk_beast/grunk_beast.tscn" id="2_43c6p"]
 [ext_resource type="Script" uid="uid://bsn026pxqwkbc" path="res://src/world/spook_manager/spook_manager.gd" id="2_bsf3i"]
 [ext_resource type="PackedScene" uid="uid://bov4ok76woyc" path="res://levels/ghost_ship/ghost_ship.tscn" id="2_jte2u"]
 
 [sub_resource type="Resource" id="Resource_43c6p"]
 script = ExtResource("2_bsf3i")
+grunkbeast_scene = ExtResource("2_43c6p")
 metadata/_custom_type_script = "uid://bsn026pxqwkbc"
 
 [node name="World" type="Node"]

vault/TODO.md

@@ -28,7 +28,7 @@
 	- [x] Model
 	- [x] Animation
 	- [ ] Controller
-	- [ ] Nav/logic?
+	- [x] Nav/logic?
 - [ ] [[level.canvas|level]]
 	- [x] level planning
 	- [ ] [[player ship]]