✨ Adds a minimalist AI for NPCs

nodes/npc/npc.gd

@@ -0,0 +1,35 @@
+extends CharacterBody2D
+
+class_name Npc
+
+const SPEED = 100
+const MINIMUM_STATE_DURATION = 3
+
+const STATES = ['panic']
+
+var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")
+var direction = 0
+
+func _ready():
+	pick_new_direction()
+	$fsm.set_states(STATES)
+
+func panic_state(delta):
+	if is_on_wall():
+		direction *= -1
+
+	var should_update = (
+		$fsm.state_duration >= MINIMUM_STATE_DURATION
+		&& ceil($fsm.state_duration) % 2 == (randi() %2)
+		)
+
+	if should_update:
+		pick_new_direction()
+		$fsm.state_duration = 0
+
+	velocity.x = direction
+	velocity.y += gravity * delta
+	move_and_slide()
+
+func pick_new_direction():
+	direction = [1,-1][randi_range(0,1)] * SPEED

nodes/npc/npc.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bm258xfujps7e"
+path="res://.godot/imported/npc.png-6ab5db0d3e525d0fae0b471428195d99.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://nodes/npc/npc.png"
+dest_files=["res://.godot/imported/npc.png-6ab5db0d3e525d0fae0b471428195d99.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

nodes/npc/npc.tscn

@@ -0,0 +1,24 @@
+[gd_scene load_steps=5 format=3 uid="uid://dvx48q5ecyxjs"]
+
+[ext_resource type="Script" path="res://nodes/npc/npc.gd" id="1_38jh5"]
+[ext_resource type="Texture2D" uid="uid://bm258xfujps7e" path="res://nodes/npc/npc.png" id="1_hgsqd"]
+[ext_resource type="Script" path="res://scripts/ia/fsm.gd" id="3_vhp64"]
+
+[sub_resource type="CapsuleShape2D" id="CapsuleShape2D_f223n"]
+radius = 4.0
+height = 14.0
+
+[node name="npc" type="CharacterBody2D"]
+script = ExtResource("1_38jh5")
+
+[node name="shape" type="CollisionShape2D" parent="."]
+rotation = 1.5708
+shape = SubResource("CapsuleShape2D_f223n")
+
+[node name="sprite" type="Sprite2D" parent="."]
+scale = Vector2(0.5, 0.5)
+texture = ExtResource("1_hgsqd")
+
+[node name="fsm" type="Node2D" parent="." node_paths=PackedStringArray("root")]
+script = ExtResource("3_vhp64")
+root = NodePath("..")

nodes/player/player.gd

@@ -16,7 +16,7 @@ const STATES= [
 
 var use_gravity = {
 	"climb": false,
-	"die": false,
+	"die": true,
 	"idle": true,
 	"jump": true,
 	"spawn": true,
@@ -30,7 +30,7 @@ func _ready():
 	$fsm.set_states(STATES)
 	add_to_group("player")
 
-func _enter_spawn():
+func on_enter_spawn_state():
 	$fsm.set_next_state("idle")
 
 func on_enter_idle_state():
@@ -59,7 +59,6 @@ func walk_state(_delta):
 	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
 		$fsm.set_next_state("jump")
 
-	# detect collision with wall or ceiling to enter climb state
 	if is_on_wall() or (Input.is_action_pressed('ui_up') && is_on_ceiling()):
 		velocity.y = 0
 		$fsm.set_next_state("climb")

nodes/player/player.tscn

@@ -24,4 +24,4 @@ shape = SubResource("CapsuleShape2D_w17ly")
 metadata/_edit_group_ = true
 
 [node name="camera" type="Camera2D" parent="."]
-zoom = Vector2(4, 4)
+zoom = Vector2(5, 5)

project.godot

@@ -10,7 +10,7 @@ config_version=5
 
 [application]
 
-config/name="LD54"
+config/name="Ant Underwater Odyssey"
 run/main_scene="res://scenes/main_menu.tscn"
 config/features=PackedStringArray("4.1", "GL Compatibility")
 config/icon="res://icon.svg"

scenes/poc.tscn

@@ -1,9 +1,10 @@
-[gd_scene load_steps=16 format=3 uid="uid://ce8ov6npvl27w"]
+[gd_scene load_steps=17 format=3 uid="uid://ce8ov6npvl27w"]
 
 [ext_resource type="Texture2D" uid="uid://cfq8pma4bpgq" path="res://assets/tilesets/cave_tileset.png" id="1_vofrt"]
 [ext_resource type="PackedScene" uid="uid://c5rmt3jeffjx7" path="res://nodes/player/player.tscn" id="2_gxv3v"]
 [ext_resource type="Texture2D" uid="uid://ccqiabs4p3ryl" path="res://assets/placeholders/map.png" id="3_aeud1"]
 [ext_resource type="Script" path="res://scripts/gameplay/rising_level.gd" id="4_ts3u4"]
+[ext_resource type="PackedScene" uid="uid://dvx48q5ecyxjs" path="res://nodes/npc/npc.tscn" id="5_0u2ly"]
 
 [sub_resource type="NavigationPolygon" id="NavigationPolygon_3t6yd"]
 vertices = PackedVector2Array(0, -16, 16, -16, 16, 16, 0, 16)
@@ -240,8 +241,28 @@ position = Vector2(1136, 1968)
 position = Vector2(1736, 3056)
 monitorable = false
 script = ExtResource("4_ts3u4")
-RISING_SPEED = 0
+RISING_SPEED = 5
 
 [node name="shape" type="CollisionShape2D" parent="water_level"]
 position = Vector2(2.08165e-12, 2.08165e-12)
 shape = SubResource("RectangleShape2D_qoxeb")
+
+[node name="npcs" type="Node2D" parent="."]
+
+[node name="npc" parent="npcs" instance=ExtResource("5_0u2ly")]
+position = Vector2(1320, 1976)
+
+[node name="npc2" parent="npcs" instance=ExtResource("5_0u2ly")]
+position = Vector2(1360, 1976)
+
+[node name="npc3" parent="npcs" instance=ExtResource("5_0u2ly")]
+position = Vector2(1432, 1992)
+
+[node name="npc4" parent="npcs" instance=ExtResource("5_0u2ly")]
+position = Vector2(1496, 1992)
+
+[node name="npc5" parent="npcs" instance=ExtResource("5_0u2ly")]
+position = Vector2(1552, 1992)
+
+[node name="npc6" parent="npcs" instance=ExtResource("5_0u2ly")]
+position = Vector2(1256, 1968)

scripts/ia/fsm.gd

@@ -8,17 +8,20 @@ var states = ['idle']
 var current_state = null
 var previous_state = null
 var next_state = null
+var state_duration = 0
 
 func set_states(new_states):
 	self.states = new_states
 
 func _ready():
+	pass
+
+func _physics_process(delta):
 	if current_state == null:
 		next_state = states[0]
+		_transition()
+		return
 
-	_transition()
-
-func _physics_process(delta):
 	if "before_state" in root:
 		root.call("before_state", delta)
 
@@ -43,6 +46,7 @@ func _transition():
 			if on_exit_state_method in root:
 				root.call(on_exit_state_method)
 
+		state_duration = 0
 		var on_enter_state_method =  "on_enter_" + current_state + "_state"
 		if on_enter_state_method in root:
 			root.call(on_enter_state_method)