ft: predator mostly done

evolve-die-repeat/molecular/predator/hammerhead_predator.gd

@@ -1,14 +1,18 @@
 extends AbstractPredator2D
 
-# TODO: attacking logic + behaviour
-# TODO: movement is buged (seems to not move/teleport somewhat
+# FIXME: (general) tracking across wrapping boundary
 # TODO: mirroring (thought, extracct that to general function/resource?
 
-@onready var sprite = $AnimatedSprite2D
-@onready var fsm = $StateMachine
-
-@export var speed = 0.8
+var can_attack: bool = true
 var desired_rotation: float = self.rotation
+@onready var sprite = $AnimatedSprite2D
+@onready var fsm: StateMachine = $StateMachine
+@onready var attack_cooldown_timer: Timer = $AttackCooldownTimer
+
+@export var damage: int = 15
+@export var attack_range = 20
+@export var sight_range = 200
+@export var speed = 0.8
 
 func _ready() -> void:
 	health = maxHealth
@@ -24,7 +28,7 @@ func _process(delta: float) -> void:
 func _physics_process(delta: float) -> void:
 	pass
 
-# FIXME: (also goes for prey) this is framerate dependent
+# FIXME: (also goes for prey) this is framerate dependent UNLESS called from a _physics function.
 func move(motion: Vector3, mod: float = 1.0) -> void:
 	move_and_collide(Vector2(motion.x, motion.y).normalized() * self.speed * mod)  # Moves along the given vector
 	self.desired_rotation = atan2(motion.y, motion.x)	
@@ -32,7 +36,45 @@ func move(motion: Vector3, mod: float = 1.0) -> void:
 	# Apply boundary to new position
 	position = GameManager.get_boundaried_position(position)
 
+func try_attack(target: Node) -> void:
+	if not can_attack:
+		return
+	attack(target)
+	
+func attack(target: Node) -> void:
+	can_attack = false
+	var hit_hittable = false
+	if target.is_in_group("prey") or target.is_in_group("player"):
+		if target.has_method("handle_damage"):
+			target.handle_damage(damage, self)
+			hit_hittable = true
+	elif target.is_in_group("resources"):
+		# TODO: resource handling logic
+		pass
+	if hit_hittable:
+		attack_cooldown_timer.start()
+	
+	
+func handle_damage(dmg: int, src: Node) -> void:
+	health = max(0, health-dmg)
+	if health == 0:
+		die()
+	if health < maxHealth/2:
+		become_injured()
+		fsm.transition_to_next_state(fsm.States.FLEEING, {"threat": src})
+	elif health < maxHealth:
+		become_injured()
+		fsm.transition_to_next_state(fsm.States.HUNTING, {"target": src})
+	
+func die() -> void:
+	super.die()
+
+func become_injured() -> void:
+	sprite.play("Hurt")
 
 func _on_sight_body_entered(body: Node2D) -> void:
-	if body.is_in_group("prey") or (health < maxHealth and body.is_in_group("player")):
+	if fsm.map(fsm.state) != fsm.States.HUNTING and body.is_in_group("prey") or (health < maxHealth and body.is_in_group("player")):
 		fsm.transition_to_next_state(fsm.States.HUNTING, {"target": body})
+
+func _on_attack_cooldown_timer_timeout() -> void:
+	can_attack = true

evolve-die-repeat/molecular/predator/hammerhead_predator.tscn

@@ -2,9 +2,12 @@
 
 [ext_resource type="Script" uid="uid://d07cjelbqbiug" path="res://molecular/predator/hammerhead_predator.gd" id="1_xp037"]
 [ext_resource type="Texture2D" uid="uid://ch5rddsumyyhm" path="res://molecular/assets/predator/predator-healthy.png" id="2_34kwa"]
+[ext_resource type="Texture2D" uid="uid://30uwkdbnuu3h" path="res://molecular/assets/predator/hammerheadRibozyme-hunting.png" id="3_0ts4d"]
 [ext_resource type="Script" uid="uid://cygrmt03sx0k1" path="res://molecular/predator/state_machine.gd" id="3_xp037"]
 [ext_resource type="Script" uid="uid://xbiqj7ubmj7d" path="res://molecular/prey/state_idle.gd" id="4_8a23j"]
+[ext_resource type="Texture2D" uid="uid://jyuf4lgjo64" path="res://molecular/assets/predator/hammerheadRibozyme-hurt.png" id="4_shhro"]
 [ext_resource type="Script" uid="uid://ubcu8fdfxxj1" path="res://molecular/prey/state_random_movement.gd" id="5_6rsu5"]
+[ext_resource type="Script" uid="uid://bc7apl71t0q04" path="res://molecular/predator/state_hunting.gd" id="8_7qt2q"]
 
 [sub_resource type="AtlasTexture" id="AtlasTexture_8a23j"]
 atlas = ExtResource("2_34kwa")
@@ -18,6 +21,30 @@ region = Rect2(64, 0, 64, 64)
 atlas = ExtResource("2_34kwa")
 region = Rect2(128, 0, 64, 64)
 
+[sub_resource type="AtlasTexture" id="AtlasTexture_nu6jw"]
+atlas = ExtResource("3_0ts4d")
+region = Rect2(0, 0, 64, 64)
+
+[sub_resource type="AtlasTexture" id="AtlasTexture_8inuv"]
+atlas = ExtResource("3_0ts4d")
+region = Rect2(64, 0, 64, 64)
+
+[sub_resource type="AtlasTexture" id="AtlasTexture_orf3n"]
+atlas = ExtResource("3_0ts4d")
+region = Rect2(128, 0, 64, 64)
+
+[sub_resource type="AtlasTexture" id="AtlasTexture_vkkje"]
+atlas = ExtResource("4_shhro")
+region = Rect2(0, 0, 64, 64)
+
+[sub_resource type="AtlasTexture" id="AtlasTexture_jfmyn"]
+atlas = ExtResource("4_shhro")
+region = Rect2(64, 0, 64, 64)
+
+[sub_resource type="AtlasTexture" id="AtlasTexture_f26lq"]
+atlas = ExtResource("4_shhro")
+region = Rect2(128, 0, 64, 64)
+
 [sub_resource type="SpriteFrames" id="SpriteFrames_shhro"]
 animations = [{
 "frames": [{
@@ -33,6 +60,34 @@ animations = [{
 "loop": true,
 "name": &"Healthy",
 "speed": 5.0
+}, {
+"frames": [{
+"duration": 1.0,
+"texture": SubResource("AtlasTexture_nu6jw")
+}, {
+"duration": 1.0,
+"texture": SubResource("AtlasTexture_8inuv")
+}, {
+"duration": 1.0,
+"texture": SubResource("AtlasTexture_orf3n")
+}],
+"loop": true,
+"name": &"Hunting",
+"speed": 5.0
+}, {
+"frames": [{
+"duration": 1.0,
+"texture": SubResource("AtlasTexture_vkkje")
+}, {
+"duration": 1.0,
+"texture": SubResource("AtlasTexture_jfmyn")
+}, {
+"duration": 1.0,
+"texture": SubResource("AtlasTexture_f26lq")
+}],
+"loop": true,
+"name": &"Hurt",
+"speed": 5.0
 }]
 
 [node name="HammerheadPredator" type="CharacterBody2D" unique_id=678504815 groups=["predator"]]
@@ -45,18 +100,20 @@ maxHealth = 50
 metadata/_custom_type_script = "uid://dgfimmq53whll"
 
 [node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="." unique_id=410999609]
+rotation = 4.712389
 sprite_frames = SubResource("SpriteFrames_shhro")
-animation = &"Healthy"
+animation = &"Hunting"
 
 [node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="." unique_id=1596156928]
 light_mask = 4
 visibility_layer = 4
 position = Vector2(0.11167908, 1.1167793)
+rotation = -1.5707964
 polygon = PackedVector2Array(-22.184862, -27.994831, 23.481365, -27.21198, 13.82622, 25.891317, -6.005971, 25.891317)
 
 [node name="StateMachine" type="Node" parent="." unique_id=1857729810 node_paths=PackedStringArray("initial_state")]
 script = ExtResource("3_xp037")
-initial_state = NodePath("Idle")
+initial_state = NodePath("RandomMovement")
 metadata/_custom_type_script = "uid://ck7k8ht54snsy"
 
 [node name="Idle" type="Node" parent="StateMachine" unique_id=265876039]
@@ -73,6 +130,10 @@ metadata/_custom_type_script = "uid://co2xp7gauamql"
 [node name="Timer" type="Timer" parent="StateMachine/RandomMovement" unique_id=447822526]
 one_shot = true
 
+[node name="Hunting" type="Node" parent="StateMachine" unique_id=1569866955]
+script = ExtResource("8_7qt2q")
+metadata/_custom_type_script = "uid://co2xp7gauamql"
+
 [node name="Sight" type="Area2D" parent="." unique_id=1608385873]
 collision_layer = 0
 collision_mask = 7
@@ -80,6 +141,15 @@ collision_mask = 7
 [node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="Sight" unique_id=1707240701]
 light_mask = 4
 visibility_layer = 4
+position = Vector2(-1.0900421, 1.6350927)
+rotation = -1.5707964
 polygon = PackedVector2Array(-27.769547, -29.426758, 31.88504, -29.184647, 12.700996, 28.7294, 56.058624, 148.93633, 22.979004, 163.77974, -19.854843, 161.65926, -53.782654, 143.84715, -8.333115, 30.157196)
 
+[node name="AttackCooldownTimer" type="Timer" parent="." unique_id=435253442]
+wait_time = 0.5
+one_shot = true
+
+[connection signal="timeout" from="StateMachine/Idle/Timer" to="StateMachine/Idle" method="_on_timer_timeout"]
+[connection signal="timeout" from="StateMachine/RandomMovement/Timer" to="StateMachine/RandomMovement" method="_on_timer_timeout"]
 [connection signal="body_entered" from="Sight" to="." method="_on_sight_body_entered"]
+[connection signal="timeout" from="AttackCooldownTimer" to="." method="_on_attack_cooldown_timer_timeout"]

evolve-die-repeat/molecular/predator/state_hunting.gd

@@ -0,0 +1,26 @@
+extends State
+
+var target: Node2D
+
+func enter(previous_state_path: String, data := {}) -> void:
+	if data.has("target"):
+		target = data["target"]
+		owner.sprite.play("Hunting")
+	else:
+		# default behaviour; do nothing
+		finished.emit(owner.fsm.States.IDLE, {})
+
+func physics_update(_delta: float) -> void:
+	if target == owner or target == null or owner.position.distance_to(target.position) > owner.sight_range:
+		finished.emit(owner.fsm.States.IDLE, {}) 
+		return
+	
+	# alternatively, we could use a collision shape and inbuilt signals, but im not sure if that works better (mixing signals and custom fsm stuff i mean
+	if owner.position.distance_to(target.position) > owner.attack_range:
+		owner.move(move_towards(target.position))
+	else:
+		owner.attack(target)
+
+func move_towards(pos: Vector2) -> Vector3:
+	var diff = target.position - owner.position
+	return Vector3(diff.x, diff.y ,0)	

evolve-die-repeat/molecular/predator/state_hunting.gd.uid

@@ -0,0 +1 @@
+uid://bc7apl71t0q04

evolve-die-repeat/molecular/predator/state_machine.gd

@@ -16,3 +16,13 @@ func transition_to_next_state(target: int, data: Dictionary = {}) -> void:
 		States.FLEEING: _transition_to_next_state("Fleeing", data)
 		States.HUNTING: _transition_to_next_state("Hunting", data)
 		_: push_error("Trying to transition to unknown state {target}")
+		
+func map(state: Node) -> States:
+	match state.name:
+		"Idle": return States.IDLE
+		"RandomMovement": return States.RANDOMMOVEMENT
+		"Feeding": return States.FEEDING
+		"Fleeing": return States.FLEEING
+		"Hunting": return States.HUNTING
+		_: push_error("Unknown state {state.name}")
+	return map(self.initial_state)