added some bucket features and two modes

scenes/model.tscn

@@ -3,7 +3,11 @@
 [ext_resource type="Script" uid="uid://g0yk17km82bv" path="res://scripts/model.gd" id="1_bctr2"]
 [ext_resource type="Script" uid="uid://b51w6528jl7ns" path="res://scripts/droplet.gd" id="2_rka1o"]
 
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_qxwdg"]
+bounce = 0.25
+
 [sub_resource type="CircleShape2D" id="CircleShape2D_jsxgm"]
+radius = 2.236068
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_jsxgm"]
 size = Vector2(142, 20)
@@ -12,7 +16,8 @@ size = Vector2(142, 20)
 script = ExtResource("1_bctr2")
 
 [node name="droplet" type="RigidBody2D" parent="." unique_id=1124928337]
-position = Vector2(100, 100)
+position = Vector2(27, 96)
+physics_material_override = SubResource("PhysicsMaterial_qxwdg")
 script = ExtResource("2_rka1o")
 metadata/_edit_group_ = true
 
@@ -54,7 +59,7 @@ shape = SubResource("RectangleShape2D_jsxgm")
 debug_color = Color(0.5959702, 0.54461277, 0.08352526, 0.41960785)
 
 [node name="bucket" type="Node2D" parent="." unique_id=431072106]
-position = Vector2(-98, 102)
+position = Vector2(276, -261)
 metadata/_edit_group_ = true
 
 [node name="platform4" type="StaticBody2D" parent="bucket" unique_id=1216137882]
@@ -86,3 +91,49 @@ metadata/_edit_group_ = true
 position = Vector2(-0.8749161, 0.48425293)
 shape = SubResource("RectangleShape2D_jsxgm")
 debug_color = Color(0.5959702, 0.54461277, 0.08352526, 0.41960785)
+
+[node name="big_bucket" type="Node2D" parent="." unique_id=1340688088]
+position = Vector2(-115, 91)
+metadata/_edit_group_ = true
+
+[node name="platform4" type="StaticBody2D" parent="big_bucket" unique_id=1712494835]
+position = Vector2(450.99997, 440)
+rotation = 1.5717075
+metadata/_edit_group_ = true
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="big_bucket/platform4" unique_id=1527990798]
+position = Vector2(-0.8749161, 0.48425293)
+shape = SubResource("RectangleShape2D_jsxgm")
+debug_color = Color(0.5959702, 0.54461277, 0.08352526, 0.41960785)
+
+[node name="platform5" type="StaticBody2D" parent="big_bucket" unique_id=1995856626]
+position = Vector2(512, 498.99997)
+rotation = 0.0012022424
+metadata/_edit_group_ = true
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="big_bucket/platform5" unique_id=1305563426]
+position = Vector2(-0.8749161, 0.48425293)
+shape = SubResource("RectangleShape2D_jsxgm")
+debug_color = Color(0.5959702, 0.54461277, 0.08352526, 0.41960785)
+
+[node name="platform7" type="StaticBody2D" parent="big_bucket" unique_id=146253526]
+position = Vector2(650, 498.99997)
+rotation = 0.00064454623
+metadata/_edit_group_ = true
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="big_bucket/platform7" unique_id=1359956789]
+position = Vector2(-0.8749161, 0.48425293)
+shape = SubResource("RectangleShape2D_jsxgm")
+debug_color = Color(0.5959702, 0.54461277, 0.08352526, 0.41960785)
+
+[node name="platform6" type="StaticBody2D" parent="big_bucket" unique_id=749418854]
+position = Vector2(710.00006, 437.00003)
+rotation = -1.5774848
+metadata/_edit_group_ = true
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="big_bucket/platform6" unique_id=1171236966]
+position = Vector2(-0.8749161, 0.48425293)
+shape = SubResource("RectangleShape2D_jsxgm")
+debug_color = Color(0.5959702, 0.54461277, 0.08352526, 0.41960785)
+
+[connection signal="body_entered" from="droplet" to="droplet" method="_on_body_entered"]

scripts/droplet.gd

@@ -1,7 +1,49 @@
 class_name Droplet extends RigidBody2D
 
-func _ready():
+# bounce mode seems to settle with a consistent surface, but is erratic
-	pass # Replace with function body.
+# stick mode seems to make sand castles, but is very calm
+enum Mode { BOUNCE, STICK }
+const mode: Mode = Mode.BOUNCE
 
-func _process(delta):
+func _ready():
+	var mat = PhysicsMaterial.new()
+	mat.bounce = .1 if mode == Mode.BOUNCE else 0
+	mat.friction = 0.0
+	physics_material_override = mat
+	
+	# setup body entered signal, seems to also matter for STICK mode
+	contact_monitor = true
+	max_contacts_reported = 10
+	body_entered.connect(_on_body_entered)
+
+func _physics_process(delta):
 	pass
+	
+func _integrate_forces(state):
+	if mode == Mode.STICK:
+		var v = state.linear_velocity
+		var contacts = state.get_contact_count()
+		for i in range(contacts):
+			var body = state.get_contact_collider_object(i)
+			var normal = state.get_contact_local_normal(i)
+			var self_damp = .9
+			var other_damp = 1 - self_damp
+			v = v.bounce(normal) * self_damp
+			state.linear_velocity = v # self bounce
+			if body is RigidBody2D: # other body
+				body.apply_central_impulse(normal * v.length() * (other_damp/contacts))
+
+func _on_body_entered(body):
+	if mode == Mode.BOUNCE:
+		# trying to elicit stronger response from rigidBody that was struck
+		# ends up being kind of erratic
+		# at damp_factor .75: settles laterally, but erratic past half-full
+		# at damp_factor of .5, it's pretty calm, but then can't overfill (expected?)
+		var vel = get_linear_velocity()
+		const damp_factor = 0.7
+		var normal = (body.global_position - global_position).normalized()
+		# reflect velocity across collision direction
+		var bounced = vel.bounce(normal) # reflection
+		set_linear_velocity(bounced * damp_factor)
+		if body is RigidBody2D:
+			body.apply_central_impulse(-bounced * damp_factor)

scripts/model.gd

@@ -1,15 +1,19 @@
 class_name Model extends Node2D
 
-const PERIOD: int = 300
+const PERIOD: int = 20 # smaller makes droplets faster
 var CURRENT_TIME: int = 0
+var last_droplet: int = 0
 
 func _ready():
 	pass # Replace with function body.
 
 func _process(delta: float):
 	CURRENT_TIME += delta * 100 	
-	if CURRENT_TIME % 100 == 0:
+	if CURRENT_TIME - last_droplet > PERIOD:
-		print("Current time: ", str(CURRENT_TIME))
+		last_droplet = CURRENT_TIME
+		# print("new droplet at time: ", str(CURRENT_TIME))
 		var droplet = preload("res://scenes/droplet.tscn").instantiate()
-		droplet.global_position = Vector2(100, 100)
+		var shape = droplet.get_node("CollisionShape2D")
+		shape.shape.radius = 5
+		droplet.global_position = Vector2(450, 100)		
 		add_child(droplet)