Leech Prototype

enemies/ghost.gd

@@ -29,7 +29,7 @@ func _physics_process(delta: float) -> void:
 	current_knockback = current_knockback/pow(1.3, 60*delta)
 
 	if(self.overlaps_body(player)):
-		player.hurt(damage, self.position-player.position)
+		player.hurt(damage, self.global_position-player.global_position)
 
 func _on_death():
 	self.queue_free()

enemies/leech.gd

@@ -0,0 +1,56 @@
+extends Node2D
+@export var broadth = 250
+@export var move_dir = 1
+@export var angular_speed = 0.25
+var angle = 0.0 if move_dir == 1 else PI
+
+@onready var segments : Array[Node] = $Segments.get_children()
+@onready var segment_count = segments.size()
+var paused = false
+var pause_time = 0.1
+
+func _process(delta: float) -> void:
+	if not paused:
+		angle -= TAU * delta * angular_speed * move_dir
+		if(angle > PI or angle < 0):
+			paused = true
+			await get_tree().create_timer(pause_time).timeout
+			paused = false
+			angle = fmod(angle + PI, PI)
+			var y = position.length()
+			var ratio = - move_dir * broadth / (2 * y)
+			var rot_angle = - 2 * asin(ratio)
+			position = position.rotated(rot_angle)
+		
+		
+		for i in range(segment_count):
+			var segment_pos_data = calculate_segment_location_and_rotation(i)
+			segments[i].position = segment_pos_data.position
+			segments[i].rotation = segment_pos_data.rotation
+
+func calculate_segment_location_and_rotation (i) -> Dictionary:
+	var aerial_end_location = Vector2.from_angle(-angle) * broadth
+	var gravicenter = (aerial_end_location + Vector2(0, -broadth) + Vector2.ZERO) / 3
+	var ax = gravicenter.x
+	var ay = gravicenter.y
+	var bx = aerial_end_location.x
+	var by = aerial_end_location.y
+	var cx = 0
+	var cy = 0
+	var d = 2 * (ax * (by - cy) + bx * (cy - ay) + cx * (ay - by))
+	var ux = ((ax * ax + ay * ay) * (by - cy) + (bx * bx + by * by) * (cy - ay) + (cx * cx + cy * cy) * (ay - by)) / d
+	var uy = ((ax * ax + ay * ay) * (cx - bx) + (bx * bx + by * by) * (ax - cx) + (cx * cx + cy * cy) * (bx - ax)) / d
+	var center = Vector2(ux, uy)
+	var radius = center.length()
+	var switch_arc_dir = false
+	if ux < 0:
+		switch_arc_dir = !switch_arc_dir
+	if center.angle() > 1:
+		switch_arc_dir = !switch_arc_dir
+	
+	var angle1 = - PI + center.angle()
+	var angle2 = - PI + (center-aerial_end_location).angle()
+	if(switch_arc_dir):
+		angle1 += TAU
+	return {"position": center + radius * Vector2.from_angle((i * angle1 + (segment_count - 1 - i) * angle2)/(segment_count - 1))
+		, "rotation": (i * angle1 + (segment_count - 1 - i) * angle2)/ (segment_count - 1) + PI/2}

enemies/leech.gd.uid

@@ -0,0 +1 @@
+uid://b70f2ylbb3btt

enemies/leech.tscn

@@ -0,0 +1,30 @@
+[gd_scene load_steps=4 format=3 uid="uid://b62xcg0dd3vct"]
+
+[ext_resource type="Script" uid="uid://b70f2ylbb3btt" path="res://enemies/leech.gd" id="1_6u582"]
+[ext_resource type="PackedScene" uid="uid://cvoicwo2xnf7e" path="res://segment.tscn" id="2_oqch2"]
+[ext_resource type="PackedScene" uid="uid://chs0u61f45nau" path="res://utils/earth_aligner.tscn" id="3_0r7dp"]
+
+[node name="Leech" type="Node2D"]
+script = ExtResource("1_6u582")
+
+[node name="Segments" type="Node2D" parent="."]
+
+[node name="Segment0" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment2" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment3" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment4" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment5" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment6" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment7" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment8" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="Segment9" parent="Segments" instance=ExtResource("2_oqch2")]
+
+[node name="EarthAligner" parent="." instance=ExtResource("3_0r7dp")]

main.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=9 format=3 uid="uid://cxo6bq26huau7"]
+[gd_scene load_steps=10 format=3 uid="uid://cxo6bq26huau7"]
 
 [ext_resource type="PackedScene" uid="uid://cmaovvr15b3qk" path="res://player/player.tscn" id="2_1bvp3"]
 [ext_resource type="Script" uid="uid://vgxh2xdevat7" path="res://world/earth.gd" id="2_lquwl"]
@@ -8,6 +8,7 @@
 [ext_resource type="PackedScene" uid="uid://cjsrtswk4vgf2" path="res://healthbar/healthbar.tscn" id="6_7mycd"]
 [ext_resource type="PackedScene" uid="uid://dpdn2php3ydsv" path="res://death_screen/death_screen.tscn" id="7_5vw27"]
 [ext_resource type="Script" uid="uid://3k6r3jnko4hg" path="res://show_fps.gd" id="8_5vw27"]
+[ext_resource type="PackedScene" uid="uid://b62xcg0dd3vct" path="res://enemies/leech.tscn" id="9_kek77"]
 
 [node name="main" type="Node2D"]
 
@@ -57,6 +58,9 @@ offset_bottom = 23.0
 grow_horizontal = 0
 script = ExtResource("8_5vw27")
 
+[node name="Leech" parent="." instance=ExtResource("9_kek77")]
+position = Vector2(0, -3000)
+
 [connection signal="active_item_changed" from="Player" to="CanvasLayer/ItemUI" method="_on_player_active_item_changed"]
 [connection signal="health_changed" from="Player" to="CanvasLayer/Healthbar" method="_on_player_health_changed"]
 [connection signal="max_hp_changed" from="Player" to="CanvasLayer/Healthbar" method="_on_player_max_hp_changed"]

segment.gd

@@ -0,0 +1,8 @@
+extends Area2D
+@onready var player = get_tree().get_root().get_node_or_null("main/Player")
+var damage = 1
+
+func _physics_process(_delta: float) -> void:
+	if (player != null and overlaps_body(player)):
+		player.hurt(damage, self.global_position-player.global_position)
+	

segment.gd.uid

@@ -0,0 +1 @@
+uid://b3q5khoqnnicx

segment.tscn

@@ -0,0 +1,20 @@
+[gd_scene load_steps=4 format=3 uid="uid://cvoicwo2xnf7e"]
+
+[ext_resource type="Script" uid="uid://b3q5khoqnnicx" path="res://segment.gd" id="1_o43lr"]
+[ext_resource type="Texture2D" uid="uid://cy70quh6k3s1j" path="res://icon.svg" id="2_sa5vt"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_fgt1l"]
+
+[node name="Segment" type="Area2D"]
+collision_layer = 0
+collision_mask = 4
+script = ExtResource("1_o43lr")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+modulate = Color(0.309804, 0.113725, 0, 1)
+scale = Vector2(0.315, 0.16)
+texture = ExtResource("2_sa5vt")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+scale = Vector2(2, 1)
+shape = SubResource("RectangleShape2D_fgt1l")