building destruction particles

buildings/building_behavior.gd

@@ -1,6 +1,41 @@
 extends Node
 
+@export var shatter_scenes: Array[PackedScene]
+var shatter_scene: PackedScene
+
 func _ready() -> void:
 	var idx := randi_range(0, %Shaker.get_child_count() - 1)
 	for child in %Shaker.get_children():
 		child.visible = child.get_index() == idx
+	shatter_scene = shatter_scenes[idx]
+
+func _on_building_destroyed_from(global_pos: Vector3) -> void:
+	var shatter = shatter_scene.instantiate()
+	shatter.show()
+	%Shatters.add_child(shatter)
+
+	var meshes: Array[MeshInstance3D]
+
+	var rbs := shatter.get_child(1).get_children()
+	for rb: RigidBody3D in rbs:
+		if randf() > .35: 
+			rb.queue_free()
+		else:
+			var dir := global_pos.direction_to(rb.global_position)
+			rb.apply_impulse(dir * 10)
+			rb.collision_layer = 0
+
+			meshes.push_back(rb.get_child(1))
+
+	var t := shatter.create_tween()
+	var first := true
+	t.tween_interval(2.)
+
+	for mesh in meshes:
+		print("mesh = ", mesh)
+		var t2 = t
+		if not first: t2 = t.parallel()
+		t2.tween_property(mesh, "transparency", 1., 0.5)
+		first = false
+
+	t.finished.connect(shatter.queue_free)