Basic Bat enemy AI

ActionRPG-HeartBeast/Effects/EnemyDeathEffect.tscn

@@ -47,12 +47,12 @@ region = Rect2( 288, 0, 32, 32 )
 animations = [ {
 "frames": [ SubResource( 1 ), SubResource( 2 ), SubResource( 3 ), SubResource( 4 ), SubResource( 5 ), SubResource( 6 ), SubResource( 7 ), SubResource( 8 ), SubResource( 9 ), SubResource( 10 ) ],
 "loop": true,
-"name": "Animation",
+"name": "Animate",
 "speed": 15.0
 } ]
 
 [node name="EnemyDeathEffect" type="AnimatedSprite"]
 frames = SubResource( 11 )
-animation = "Animation"
+animation = "Animate"
 offset = Vector2( 0, -8 )
 script = ExtResource( 1 )

ActionRPG-HeartBeast/Effects/HitEffect.tscn

@@ -0,0 +1,26 @@
+[gd_scene load_steps=6 format=2]
+
+[ext_resource path="res://Effects/Effect.gd" type="Script" id=1]
+[ext_resource path="res://Effects/HitEffect.png" type="Texture" id=2]
+
+[sub_resource type="AtlasTexture" id=1]
+atlas = ExtResource( 2 )
+region = Rect2( 0, 0, 24, 24 )
+
+[sub_resource type="AtlasTexture" id=2]
+atlas = ExtResource( 2 )
+region = Rect2( 24, 0, 24, 24 )
+
+[sub_resource type="SpriteFrames" id=3]
+animations = [ {
+"frames": [ SubResource( 1 ), SubResource( 2 ) ],
+"loop": true,
+"name": "Animate",
+"speed": 10.0
+} ]
+
+[node name="HitEffect" type="AnimatedSprite"]
+frames = SubResource( 3 )
+animation = "Animate"
+offset = Vector2( 0, -8 )
+script = ExtResource( 1 )

ActionRPG-HeartBeast/Enemies/Bat.gd

@@ -2,14 +2,52 @@ extends KinematicBody2D
 
 const EnemyDeathEffect = preload("res://Effects/EnemyDeathEffect.tscn")
 
-var knockback = Vector2.ZERO
+export var ACCELERATION = 300
+export var MAX_SPEED = 50
+export var FRICTION = 200
 
+enum {
+	IDLE,
+	WANDER,
+	CHASE
+}
+
+var knockback = Vector2.ZERO
+var velocity = Vector2.ZERO
+
+var state = IDLE
+
+onready var sprite = $AnimatedSprite
 onready var stats = $Stats
+onready var playerDetectionZone = $PlayerDetectionZone
 
 func _physics_process(delta):
 	knockback = knockback.move_toward(Vector2.ZERO, 200 * delta)
 	knockback = move_and_slide(knockback)
 	
+	match state:
+		IDLE:
+			velocity = velocity.move_toward(Vector2.ZERO, FRICTION * delta)
+			seek_player()
+			
+		WANDER:
+			pass
+			
+		CHASE:
+			var player = playerDetectionZone.player
+			if player != null:
+				var direction = (player.global_position - global_position).normalized()
+				velocity = velocity.move_toward(direction * MAX_SPEED, ACCELERATION * delta)
+			else:
+				state = IDLE
+			sprite.flip_h = velocity.x < 0
+			
+	velocity = move_and_slide(velocity)
+		
+func seek_player():
+	if playerDetectionZone.can_see_player():
+		state = CHASE
+
 func _on_Hurtbox_area_entered(area):
 	stats.health -= area.damage
 	knockback = area.knockback_vector * 120

ActionRPG-HeartBeast/Enemies/Bat.tscn

@@ -1,10 +1,11 @@
-[gd_scene load_steps=14 format=2]
+[gd_scene load_steps=16 format=2]
 
 [ext_resource path="res://Enemies/Bat.png" type="Texture" id=1]
 [ext_resource path="res://Shadows/SmallShadow.png" type="Texture" id=2]
 [ext_resource path="res://Overlap/Hurtbox.tscn" type="PackedScene" id=3]
 [ext_resource path="res://Enemies/Bat.gd" type="Script" id=4]
 [ext_resource path="res://Stats.tscn" type="PackedScene" id=5]
+[ext_resource path="res://Enemies/PlayerDetectionZone.tscn" type="PackedScene" id=6]
 
 [sub_resource type="AtlasTexture" id=1]
 atlas = ExtResource( 1 )
@@ -41,6 +42,9 @@ radius = 4.12311
 radius = 7.0
 height = 6.0
 
+[sub_resource type="CircleShape2D" id=9]
+radius = 61.0328
+
 [node name="Bat" type="KinematicBody2D"]
 collision_layer = 16
 script = ExtResource( 4 )
@@ -48,7 +52,7 @@ script = ExtResource( 4 )
 [node name="AnimatedSprite" type="AnimatedSprite" parent="."]
 frames = SubResource( 6 )
 animation = "Fly"
-frame = 4
+frame = 1
 playing = true
 offset = Vector2( 0, -12 )
 
@@ -68,7 +72,14 @@ shape = SubResource( 8 )
 [node name="Stats" parent="." instance=ExtResource( 5 )]
 max_health = 2
 
+[node name="PlayerDetectionZone" parent="." instance=ExtResource( 6 )]
+
+[node name="CollisionShape2D" parent="PlayerDetectionZone" index="0"]
+modulate = Color( 1, 1, 1, 0.258824 )
+shape = SubResource( 9 )
+
 [connection signal="area_entered" from="Hurtbox" to="." method="_on_Hurtbox_area_entered"]
 [connection signal="no_health" from="Stats" to="." method="_on_Stats_no_health"]
 
 [editable path="Hurtbox"]
+[editable path="PlayerDetectionZone"]

ActionRPG-HeartBeast/Enemies/PlayerDetectionZone.gd

@@ -0,0 +1,13 @@
+extends Area2D
+
+var player = null
+
+# Called when the node enters the scene tree for the first time.
+func can_see_player():
+	return player != null
+
+func _on_PlayerDetectionZone_body_entered(body):
+	player = body
+
+func _on_PlayerDetectionZone_body_exited(body):
+	player = null

ActionRPG-HeartBeast/Enemies/PlayerDetectionZone.tscn

@@ -0,0 +1,13 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://Enemies/PlayerDetectionZone.gd" type="Script" id=1]
+
+[node name="PlayerDetectionZone" type="Area2D"]
+collision_layer = 0
+collision_mask = 2
+script = ExtResource( 1 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+
+[connection signal="body_entered" from="." to="." method="_on_PlayerDetectionZone_body_entered"]
+[connection signal="body_exited" from="." to="." method="_on_PlayerDetectionZone_body_exited"]

ActionRPG-HeartBeast/Overlap/Hurtbox.gd

@@ -0,0 +1,22 @@
+extends Area2D
+
+export(bool) var show_hit = true
+
+const HitEffect = preload("res://Effects/HitEffect.tscn")
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+#func _process(delta):
+#	pass
+
+
+func _on_Hurtbox_area_entered(area):
+	if show_hit:
+		var effect = HitEffect.instance()
+		var main = get_tree().current_scene
+		main.add_child(effect)
+		effect.global_position = global_position

ActionRPG-HeartBeast/Overlap/Hurtbox.tscn

@@ -1,7 +1,12 @@
-[gd_scene format=2]
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://Overlap/Hurtbox.gd" type="Script" id=1]
 
 [node name="Hurtbox" type="Area2D"]
 collision_layer = 0
 collision_mask = 0
+script = ExtResource( 1 )
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+
+[connection signal="area_entered" from="." to="." method="_on_Hurtbox_area_entered"]

ActionRPG-HeartBeast/World/Grass.tscn

@@ -17,6 +17,7 @@ offset = Vector2( -8, -8 )
 
 [node name="Hurtbox" parent="." instance=ExtResource( 3 )]
 collision_layer = 8
+show_hit = false
 
 [node name="CollisionShape2D" parent="Hurtbox" index="0"]
 position = Vector2( 8, 8 )