first commit

Main.gd

@@ -0,0 +1,38 @@
+extends Node2D
+
+const Droplet := preload("res://Droplet.tscn")
+
+var rain_density := 0.0 # drops/s
+
+func _ready() -> void:
+    _change_rain()
+
+func _physics_process(dt: float) -> void:
+    for _i in range(max(0, int(roundf(rain_density * dt + .5 - randf())))):
+        _spawn_droplet()
+
+func _change_rain() -> void:
+    var n1 := randfn(0.0, 1.0)
+    var n2 := randfn(0.0, 1.0)
+    var target_density := clampf(10.0 * n1 * n1, 2.0, 150.0) - 2.0
+    create_tween().set_process_mode(Tween.TWEEN_PROCESS_PHYSICS) \
+        .tween_property(self, "rain_density", target_density, .5 + 5.0 * randf()) \
+        .set_ease(Tween.EASE_IN_OUT) \
+        .set_trans(Tween.TRANS_QUAD) \
+        .set_delay(10.0 + minf(4.0 * n2 * n2, 30.0)) \
+        .finished.connect(_change_rain)
+    
+func _spawn_droplet() -> void:
+    var d := Droplet.instantiate()
+    d.scale = Vector2(0.75 + 0.5 * randf(), 0.75 + 0.5 * randf())
+    d.position = Vector2(100.0 + 1350.0 * randf(), -(50.0 + 400.0 * randf()))
+    d.linear_velocity = Vector2(-300.0 * (0.75 + 0.5 * randf()), 1250.0 * (0.75 + 0.5 * randf()))
+    d.z_index = 1
+    if randf() < .5:
+        d.collision_mask = 0
+        if randf() < .5:
+            d.z_index = 0
+    add_child(d)
+
+func _on_area_2d_body_entered(body: Node2D) -> void:
+    body.apply_central_impulse(Vector2(0.5, -0.5) * 5000)