friction and sand pit

objects/sand_pit.gd

@@ -0,0 +1,30 @@
+extends CSGPolygon3D
+
+
+@export var friction: float
+
+@export_group("Node References")
+@export var collision_polygon: CollisionPolygon3D
+
+
+var _players: Array[Player] = []
+
+
+func _ready() -> void:
+	collision_polygon.polygon = polygon
+	collision_polygon.depth = depth
+
+
+func _physics_process(delta: float) -> void:
+	for player in _players:
+		player.velocity = lerp(player.velocity, Vector3.ZERO, friction * delta)
+
+
+func _on_body_entered(body: Node3D) -> void:
+	if body is Player:
+		_players.append(body)
+
+
+func _on_body_exited(body: Node3D) -> void:
+	if body is Player:
+		_players.erase(body)