First working spring implementation

The behaviour of the spring is
erratic still.
The main problem is:
Blobby being slowed down,
disproportionally much when touching the spring surface.

A communication between the contraption and Blobbys physics needs to happen.
He has to slow down according to the, motion of the spring plattform,
and not go to 0 because hes touching some ground.

The other thing is that it should be always possible to jump.
Currently the platform can move down faster than blobby and cause
him to hover, which makes jumping
unavailable.

src/Actors/Blobby/Blobby.gd

@@ -20,13 +20,13 @@ onready var camera = $Camera2D
 
 # TODO This is the worst thing since... you know
 # When the Enemy stomp AREA enters the enemy collision area -> stomp
-func _on_Skin_area_entered(area: Area2D) -> void:
+func _on_BlobbySkin_area_entered(area: Area2D) -> void:
 	if area.name == "StompDetector":
 		velocity = calculate_stomp_velocity(velocity, stomp_feedback)
 
 
 # When the Enemy collision BODY enters the enemy collision area -> die
-func _on_Skin_body_entered(body: Node) -> void:
+func _on_BlobbySkin_body_entered(body: Node) -> void:
 	if body.name == "EnemyBody":
 		die()
 

src/Actors/Blobby/Blobby.tscn

@@ -39,11 +39,11 @@ script = ExtResource( 2 )
 
 [node name="ShiftTween" type="Tween" parent="Camera2D"]
 
-[node name="Skin" type="Area2D" parent="."]
+[node name="BlobbySkin" type="Area2D" parent="."]
 collision_mask = 126
 
-[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="Skin"]
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="BlobbySkin"]
-scale = Vector2( 1.03, 1.03 )
+scale = Vector2( 1.04, 1.04 )
 polygon = PoolVector2Array( -6.7, -3.311, -2.676, -7.3, 3.939, -7.3, 8, -1.863, 8, 4.912, 4.944, 8.5, -1.03623, 8.5, -4.213, 8.5, -6.7, 6.089 )
 
 [node name="PlayerStateMachine" type="Node" parent="."]
@@ -74,13 +74,13 @@ valign = 1
 position = Vector2( 3.86988, 6.34765 )
 
 [node name="Left_Wallcast1" type="RayCast2D" parent="WallRaycasts/LeftWallRaycast"]
-position = Vector2( -10.706, -8.03844 )
+position = Vector2( -10.5748, -8.60978 )
 enabled = true
 cast_to = Vector2( -2, 0 )
 collision_mask = 9
 
 [node name="Left_Wallcast2" type="RayCast2D" parent="WallRaycasts/LeftWallRaycast"]
-position = Vector2( -10.706, -1.9261 )
+position = Vector2( -10.5888, -1.27766 )
 enabled = true
 cast_to = Vector2( -2, 0 )
 collision_mask = 9
@@ -88,17 +88,17 @@ collision_mask = 9
 [node name="RightWallRaycast" type="Node2D" parent="WallRaycasts"]
 
 [node name="Right_Wallcast1" type="RayCast2D" parent="WallRaycasts/RightWallRaycast"]
-position = Vector2( 7.97737, -0.838908 )
+position = Vector2( 8.00081, -0.776408 )
 enabled = true
 cast_to = Vector2( 2, 0 )
 collision_mask = 9
 
 [node name="Right_Wallcast2" type="RayCast2D" parent="WallRaycasts/RightWallRaycast"]
-position = Vector2( 8.0633, 3.84536 )
+position = Vector2( 8.01643, 3.91567 )
 enabled = true
 cast_to = Vector2( 2, 0 )
 collision_mask = 9
 
-[connection signal="area_entered" from="Skin" to="." method="_on_Skin_area_entered"]
+[connection signal="area_entered" from="BlobbySkin" to="." method="_on_BlobbySkin_area_entered"]
-[connection signal="body_entered" from="Skin" to="." method="_on_Skin_body_entered"]
+[connection signal="body_entered" from="BlobbySkin" to="." method="_on_BlobbySkin_body_entered"]
 [connection signal="timeout" from="PlayerStateMachine/JumpBufferTimer" to="." method="_on_JumpBufferTimer_timeout"]

src/Actors/Enemy/Enemy.gd

@@ -8,6 +8,7 @@ func _ready() -> void:
 	velocity.x = -30
 
 
+# TODO Unify areas of kinematic bodies to skin
 func _on_StompDetector_body_entered(body: Node) -> void:
 	if body.global_position.y > get_node("StompDetector").global_position.y:
 		return

src/Contraptions/Platform/Spring.gd

@@ -6,10 +6,11 @@ const PhysicsConst = preload("res://src/Utilities/Physic/PhysicsConst.gd")
 # var a: int = 2
 # var b: Strin = "text"
 var mass = 1
-var spring_k = -200
+var spring_k = -500
 var start_y = 0
 var y_velocity = 0
-var friction = 0.9
+var friction = 0.91
+var stored_incoming_velocity = 0
 
 
 # Called when the node enters the scene tree for the first time.
@@ -22,7 +23,6 @@ func _physics_process(delta: float) -> void:
 	var spring_force = spring_k * (self.position.y - self.start_y)
 	var weight_force = PhysicsConst.gravity * mass
 	var result_force = weight_force + spring_force
-
 	y_velocity += PhysicsFunc.convert_force_to_velocity(
 		result_force, mass, delta
 	)
@@ -30,14 +30,36 @@ func _physics_process(delta: float) -> void:
 	y_velocity *= friction
 
 	self.position.y += y_velocity * delta
+	if !_if_do_bounce():
+		_store_incoming_velocity()
 
 
-func _on_Area2D_area_entered(area: Area2D) -> void:
+# TODO this works against the physics process
+func _store_incoming_velocity():
+	var areas: Array = $EnteringVelocityDetector.get_overlapping_areas()
+	for i in range(0, areas.size()):
+		if areas[i].name == "BlobbySkin":
+			print_debug(stored_incoming_velocity)
+			if areas[i].get_parent().velocity.y != 0:
+				stored_incoming_velocity = areas[i].get_parent().velocity.y
+
+
+func _if_do_bounce() -> bool:
+	var areas: Array = $SpringSkin.get_overlapping_areas()
+	for i in range(0, areas.size()):
+		if areas[i].name == "BlobbySkin":
+			_Kinematic_Body_on_Spring(areas[i])
+			return true
+	return false
+
+
+func _Kinematic_Body_on_Spring(area: Area2D) -> void:
 	var area_parent = area.get_parent()
-	var a_velocity = area_parent.velocity.y
+	var a_velocity = stored_incoming_velocity
 	var a_mass = area_parent.mass
 	var b_velocity = y_velocity
 	var b_mass = mass
 	y_velocity += PhysicsFunc.complete_unelastic_shock(
 		a_velocity, b_velocity, a_mass, b_mass
 	)
+	stored_incoming_velocity = area_parent.velocity.y

src/Contraptions/Platform/Spring.tscn

@@ -1,38 +1,42 @@
-[gd_scene load_steps=5 format=2]
+[gd_scene load_steps=6 format=2]
 
 [ext_resource path="res://src/Contraptions/Platform/Spring.gd" type="Script" id=1]
 [ext_resource path="res://assets/environment/blocks/Basic stone block.png" type="Texture" id=2]
 
-[sub_resource type="RectangleShape2D" id=1]
-extents = Vector2( 11.913, 1.58343 )
-
 [sub_resource type="RectangleShape2D" id=2]
-extents = Vector2( 11.8988, 1.56963 )
+extents = Vector2( 11.4526, 1.7975 )
+
+[sub_resource type="RectangleShape2D" id=1]
+extents = Vector2( 11.9386, 1.57982 )
+
+[sub_resource type="RectangleShape2D" id=3]
+extents = Vector2( 11.4, 1.42384 )
 
 [node name="Spring" type="Node2D"]
 script = ExtResource( 1 )
 
-[node name="StaticBody2D" type="StaticBody2D" parent="."]
+[node name="Sprite" type="Sprite" parent="."]
-collision_layer = 32
-collision_mask = 41
-
-[node name="Sprite" type="Sprite" parent="StaticBody2D"]
-position = Vector2( -11.9516, -1.58488 )
 scale = Vector2( 1.48986, 0.197785 )
 texture = ExtResource( 2 )
-centered = false
 
-[node name="SpringBody" type="CollisionShape2D" parent="StaticBody2D"]
+[node name="SpringSkin" type="Area2D" parent="."]
-position = Vector2( -0.0323062, -0.0131137 )
-shape = SubResource( 1 )
-
-[node name="Spring" type="Area2D" parent="StaticBody2D"]
-position = Vector2( -0.0323062, -0.0131137 )
 collision_layer = 32
 collision_mask = 3
 
-[node name="CollisionShape2D" type="CollisionShape2D" parent="StaticBody2D/Spring"]
+[node name="CollisionShape2D" type="CollisionShape2D" parent="SpringSkin"]
-position = Vector2( 0.0323062, 0.0137925 )
 shape = SubResource( 2 )
 
-[connection signal="area_entered" from="StaticBody2D/Spring" to="." method="_on_Area2D_area_entered"]
+[node name="SpringBody" type="KinematicBody2D" parent="."]
+collision_layer = 32
+collision_mask = 41
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="SpringBody"]
+shape = SubResource( 1 )
+
+[node name="EnteringVelocityDetector" type="Area2D" parent="."]
+position = Vector2( 0, -3.99571 )
+collision_layer = 32
+collision_mask = 41
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="EnteringVelocityDetector"]
+shape = SubResource( 3 )

src/Levels/Plattforms Level.tscn

@@ -64,3 +64,5 @@ position = Vector2( 206.918, 601.665 )
 
 [node name="Blobby" parent="." instance=ExtResource( 1 )]
 position = Vector2( 50.7867, 604.063 )
+
+[editable path="Spring"]