ft: nucleotide prey FSM

evolve-die-repeat/molecular/prey/nucleotide_prey.gd

@@ -0,0 +1,152 @@
+extends AbstractPrey2D
+
+@onready var sprite = get_node("AnimatedSprite2D")
+@onready var fsm = $StateMachine
+
+# Mirroed sprites for periodic boundary
+var mirrorSprite1: Node2D
+var mirrorSprite2: Node2D
+var mirrorSprite3: Node2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	health = maxHealth
+	sprite.play("Healthy")
+	
+	mirrorSprite1 = sprite.duplicate()
+	mirrorSprite2 = sprite.duplicate()
+	mirrorSprite3 = sprite.duplicate()
+
+	add_child(mirrorSprite1)
+	add_child(mirrorSprite2)
+	add_child(mirrorSprite3)
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	# Boundary mirroring
+	_handle_wrapping()
+
+func _physics_process(delta: float) -> void:
+	#self.move(Vector3(randfn(0, 1), randfn(0, 1), 0))
+	# TODO: state transition logic (bot controller code)
+	pass
+
+func move(motion: Vector3) -> void:
+	move_and_collide(Vector2(motion.x, motion.y))  # Moves along the given vector
+	
+	# Apply boundary to new position
+	position = GameManager.get_boundaried_position(position)
+
+func handle_damage(dmg: int, src: Node) -> void:
+	health = max(0, health-dmg)
+	if health == 0:
+		die()
+	if health < maxHealth:
+		become_injured()
+	fsm.transition_to_next_state(fsm.States.FLEEING, {"threat": src})
+	
+func die() -> void:
+	sprite.play("Dying")
+	super.die()
+
+func become_injured() -> void:
+	sprite.play("Injured")
+	mirrorSprite1.play("Injured")
+	mirrorSprite2.play("Injured")
+	mirrorSprite3.play("Injured")
+
+# Mirroring table:
+# |---|---|---|---|
+# | 4 | 3 | 4 | 3 |
+# |---|===|===|---|
+# | 1 ǁ 2 | 1 ǁ 2 |
+# |---ǁ---|---ǁ---|
+# | 4 ǁ 3 | 4 ǁ 3 |
+# |---|===|===|---|
+# | 1 | 2 | 1 | 2 |
+# |---|---|---|---|
+# If less than viewport size away from an edge, mirror over that edge (for seamless boundary)
+# NOTE: For this to look correctly the camera size should be smaller than half the screen port (in
+# 		any one dimension. Ideally, the difference between camera size and half the screen port is 
+# 		at least the size of the prey sprite)
+func _handle_wrapping():
+	mirrorSprite1.visible = false
+	mirrorSprite2.visible = false
+	mirrorSprite3.visible = false
+	
+	# TODO: Assume viewport size << screen size and only draw according to GameManager.viewport_size
+	# Find corresponding section of the screen
+	if position.x < GameManager.screen_size.x/2 and position.y < GameManager.screen_size.y/2:
+		# 2
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Right
+		#mirrorSprite1.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite1.position = Vector2(GameManager.screen_size.x, 0)
+		# Diag
+		#mirrorSprite2.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite3.position = Vector2(GameManager.screen_size.x, GameManager.screen_size.y)
+		# Bottom
+		#mirrorSprite3.position = Vector2(sprite.position.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(0, GameManager.screen_size.y)
+
+		
+	elif position.x < GameManager.screen_size.x/2:
+		# 3
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Top
+		#mirrorSprite1.position = Vector2(sprite.position.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite1.position = Vector2(0, - GameManager.screen_size.y)
+		# Diag
+		#mirrorSprite2.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(GameManager.screen_size.x, - GameManager.screen_size.y)
+		# Right
+		#mirrorSprite3.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite3.position = Vector2(GameManager.screen_size.x, 0)
+		
+		
+	elif position.y < GameManager.screen_size.y/2:
+		# 1
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Left 
+		#mirrorSprite1.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite1.position = Vector2(- GameManager.screen_size.x, 0)
+		# Bottom
+		#mirrorSprite2.position = Vector2(sprite.position.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(0, GameManager.screen_size.y)
+		# Diag
+		#mirrorSprite3.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite3.position = Vector2(- GameManager.screen_size.x, GameManager.screen_size.y)
+
+
+	else:
+		# 4
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Left
+		#mirrorSprite1.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite1.position = Vector2(- GameManager.screen_size.x, 0)
+		# Diag
+		#mirrorSprite2.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(- GameManager.screen_size.x, - GameManager.screen_size.y)
+		# Top
+		#mirrorSprite3.position = Vector2(sprite.position.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite3.position = Vector2(0,  - GameManager.screen_size.y)
+
+	
+
+
+func _on_timer_timeout() -> void:
+	pass # Replace with function body.

evolve-die-repeat/molecular/prey/nucleotide_prey.gd.uid

@@ -0,0 +1 @@
+uid://bgossk6xo31gi

evolve-die-repeat/molecular/prey/nucleotide_prey.tscn

@@ -0,0 +1,85 @@
+[gd_scene load_steps=14 format=3 uid="uid://c3iw2v3x6ngrb"]
+
+[ext_resource type="PackedScene" uid="uid://bvsdg1v3ksixy" path="res://shared/npc/prey2D.tscn" id="1_qvulj"]
+[ext_resource type="Script" uid="uid://bgossk6xo31gi" path="res://molecular/prey/nucleotide_prey.gd" id="2_0227s"]
+[ext_resource type="Texture2D" uid="uid://bhcb5g7g7um8" path="res://molecular/assets/prey/prey-dying-frame0.png" id="2_lkj7f"]
+[ext_resource type="Texture2D" uid="uid://bxn11avw7dykl" path="res://molecular/assets/prey/prey-dying-frame1.png" id="3_svqyr"]
+[ext_resource type="Texture2D" uid="uid://ctkehsavw6ghx" path="res://molecular/assets/prey/prey-healthy-frame0.png" id="4_ee1gb"]
+[ext_resource type="Texture2D" uid="uid://uy28y3mkk6nt" path="res://molecular/assets/prey/prey-healthy-frame1.png" id="5_ae5nf"]
+[ext_resource type="Texture2D" uid="uid://btnyajci8ptb2" path="res://molecular/assets/prey/prey-injured-frame0.png" id="6_0f87h"]
+[ext_resource type="Texture2D" uid="uid://bqll8ge4cr2uf" path="res://molecular/assets/prey/prey-injured-frame1.png" id="7_w7inl"]
+[ext_resource type="Script" uid="uid://0vwv2nt16gpv" path="res://molecular/prey/nucleotide_prey_state_machine.gd" id="9_xxtgy"]
+[ext_resource type="Script" uid="uid://ubcu8fdfxxj1" path="res://molecular/prey/nucleotide_prey_random_movement.gd" id="10_rgguv"]
+[ext_resource type="Script" uid="uid://xbiqj7ubmj7d" path="res://molecular/prey/nucleotide_prey_idle.gd" id="12_ubfhk"]
+[ext_resource type="Script" uid="uid://dlw7inlh6asvu" path="res://molecular/prey/nucleotide_prey_fleeing.gd" id="12_xxtgy"]
+
+[sub_resource type="SpriteFrames" id="SpriteFrames_66x8p"]
+animations = [{
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("2_lkj7f")
+}, {
+"duration": 20.0,
+"texture": ExtResource("3_svqyr")
+}],
+"loop": true,
+"name": &"Dying",
+"speed": 1.0
+}, {
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("4_ee1gb")
+}, {
+"duration": 20.0,
+"texture": ExtResource("5_ae5nf")
+}],
+"loop": true,
+"name": &"Healthy",
+"speed": 1.0
+}, {
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("6_0f87h")
+}, {
+"duration": 20.0,
+"texture": ExtResource("7_w7inl")
+}],
+"loop": true,
+"name": &"Injured",
+"speed": 1.0
+}]
+
+[node name="NucleotidePrey" groups=["prey"] instance=ExtResource("1_qvulj")]
+collision_layer = 2
+motion_mode = 1
+script = ExtResource("2_0227s")
+maxHealth = 20
+
+[node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="." index="0"]
+scale = Vector2(0.1, 0.1)
+sprite_frames = SubResource("SpriteFrames_66x8p")
+animation = &"Injured"
+
+[node name="StateMachine" type="Node" parent="." index="2" node_paths=PackedStringArray("initial_state")]
+script = ExtResource("9_xxtgy")
+initial_state = NodePath("Idle")
+metadata/_custom_type_script = "uid://ck7k8ht54snsy"
+
+[node name="RandomMovement" type="Node" parent="StateMachine" index="0"]
+script = ExtResource("10_rgguv")
+
+[node name="Timer" type="Timer" parent="StateMachine/RandomMovement" index="0"]
+one_shot = true
+
+[node name="Fleeing" type="Node" parent="StateMachine" index="1"]
+script = ExtResource("12_xxtgy")
+
+[node name="Idle" type="Node" parent="StateMachine" index="2"]
+script = ExtResource("12_ubfhk")
+metadata/_custom_type_script = "uid://co2xp7gauamql"
+
+[node name="Timer" type="Timer" parent="StateMachine/Idle" index="0"]
+one_shot = true
+
+[connection signal="timeout" from="StateMachine/RandomMovement/Timer" to="StateMachine/RandomMovement" method="_on_timer_timeout"]
+[connection signal="timeout" from="StateMachine/Idle/Timer" to="StateMachine/Idle" method="_on_timer_timeout"]

evolve-die-repeat/molecular/prey/nucleotide_prey_fleeing.gd

@@ -0,0 +1,22 @@
+extends State
+
+var threat: Node2D
+var threshold: float = 100
+
+func enter(previous_state_path: String, data := {}) -> void:
+	if data.has("threat"):
+		threat = data["threat"]
+	else:
+		# default behaviour; do nothing
+		threat = owner
+
+func physics_update(_delta: float) -> void:
+	if owner.position.distance_to(threat.position) > threshold:
+		finished.emit(owner.fsm.States.IDLE, {}) 
+		return
+	owner.move(flee_from(threat.position))
+
+func flee_from(pos: Vector2) -> Vector3:
+	var diff = threat.position - owner.position
+	diff = diff.normalized() * -1
+	return Vector3(diff.x, diff.y ,0)	

evolve-die-repeat/molecular/prey/nucleotide_prey_fleeing.gd.uid

@@ -0,0 +1 @@
+uid://dlw7inlh6asvu

evolve-die-repeat/molecular/prey/nucleotide_prey_idle.gd

@@ -0,0 +1,19 @@
+extends State
+
+@onready var timer = $Timer
+
+
+func enter(previous_state_path: String, data := {}) -> void:
+	timer.start((float)(randi() % 5)/5)
+
+func physics_update(_delta: float) -> void:
+	owner.move(Vector3(randfn(0, 1), randfn(0, 1), 0))
+
+func _on_timer_timeout() -> void:
+	if (randi() % 4 != 0):
+		finished.emit(owner.fsm.States.RANDOMMOVEMENT, {})
+	else:
+		finished.emit(owner.fsm.States.IDLE, {})
+
+func exit() -> void:
+	timer.stop()

evolve-die-repeat/molecular/prey/nucleotide_prey_idle.gd.uid

@@ -0,0 +1 @@
+uid://xbiqj7ubmj7d

evolve-die-repeat/molecular/prey/nucleotide_prey_random_movement.gd

@@ -0,0 +1,20 @@
+extends State
+
+@onready var timer = $Timer
+var dir: Vector3 = Vector3(0,0,0);
+
+func enter(previous_state_path: String, data := {}) -> void:
+	timer.start((float)(randi() % 10)/20)
+	dir = calc_dir(randi() % 360)
+
+func physics_update(_delta: float) -> void:
+	owner.move(dir)
+
+func calc_dir(angle: float) -> Vector3:
+	return Vector3(cos(angle), sin(angle), 0)	
+	
+func _on_timer_timeout() -> void:
+	finished.emit(owner.fsm.States.IDLE, {})
+
+func exit() -> void:
+	timer.stop()

evolve-die-repeat/molecular/prey/nucleotide_prey_random_movement.gd.uid

@@ -0,0 +1 @@
+uid://ubcu8fdfxxj1

evolve-die-repeat/molecular/prey/nucleotide_prey_state_machine.gd

@@ -0,0 +1,17 @@
+extends StateMachine
+
+enum States {IDLE, RANDOMMOVEMENT, FEEDING, FLEEING}
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	super()
+	await owner.ready
+
+
+func transition_to_next_state(target: int, data: Dictionary = {}) -> void:
+	match target:
+		States.IDLE: _transition_to_next_state("Idle", data)
+		States.RANDOMMOVEMENT: _transition_to_next_state("RandomMovement", data)
+		States.FEEDING: _transition_to_next_state("Feeding", data)
+		States.FLEEING: _transition_to_next_state("Fleeing", data)
+		_: push_error("Trying to transition to unknown state {target}")

evolve-die-repeat/molecular/prey/nucleotide_prey_state_machine.gd.uid

@@ -0,0 +1 @@
+uid://0vwv2nt16gpv