make turning platforms be one-way only when player is inside of them already

objects/environment/turniwood/turning_platform.gd

@@ -2,6 +2,7 @@ extends Node2D
 onready var anims = $AnimationPlayer
 onready var flip_timer = $FlipTimer
 onready var delay_timer = $DelayTimer
+onready var collision_shape = $StaticBody2D/CollisionShape2D
 export var time:float = 60
 export var delay = 0.0
 export(int, "Wood", "Yellow") var color
@@ -28,3 +29,14 @@ func _on_FlipTimer_timeout():
 func _on_DelayTimer_timeout():
 	anims.play("idle")
 	flip_timer.start(time_ms)
+
+
+func _on_DetectPlayer_area_entered(area):
+	if area.is_in_group("player"):
+		Debug.print("player in")
+		collision_shape.set_deferred("one_way_collision", true)
+
+func _on_DetectPlayer_area_exited(area):
+	if area.is_in_group("player"):
+		Debug.print("player out")
+		collision_shape.set_deferred("one_way_collision", false)

objects/environment/turniwood/turning_platform.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=6 format=2]
+[gd_scene load_steps=7 format=2]
 
 [ext_resource path="res://objects/environment/turniwood/turning_platform.gd" type="Script" id=1]
 [ext_resource path="res://graphics/turniwood/turning_platform_yellow.png" type="Texture" id=2]
@@ -6,6 +6,9 @@
 [sub_resource type="RectangleShape2D" id=1]
 extents = Vector2( 4, 1 )
 
+[sub_resource type="RectangleShape2D" id=4]
+extents = Vector2( 3.5, 0.5 )
+
 [sub_resource type="Animation" id=2]
 resource_name = "idle"
 loop = true
@@ -115,7 +118,16 @@ collision_layer = 4
 [node name="CollisionShape2D" type="CollisionShape2D" parent="StaticBody2D"]
 position = Vector2( 4, 4 )
 shape = SubResource( 1 )
-one_way_collision = true
+one_way_collision_margin = 0.0
+
+[node name="DetectPlayer" type="Area2D" parent="."]
+collision_layer = 0
+collision_mask = 2
+monitorable = false
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="DetectPlayer"]
+position = Vector2( 4, 4 )
+shape = SubResource( 4 )
 
 [node name="AnimationPlayer" type="AnimationPlayer" parent="."]
 anims/idle = SubResource( 2 )
@@ -126,6 +138,8 @@ anims/turn = SubResource( 3 )
 [node name="DelayTimer" type="Timer" parent="."]
 one_shot = true
 
+[connection signal="area_entered" from="DetectPlayer" to="." method="_on_DetectPlayer_area_entered"]
+[connection signal="area_exited" from="DetectPlayer" to="." method="_on_DetectPlayer_area_exited"]
 [connection signal="animation_finished" from="AnimationPlayer" to="." method="_on_AnimationPlayer_animation_finished"]
 [connection signal="timeout" from="FlipTimer" to="." method="_on_FlipTimer_timeout"]
 [connection signal="timeout" from="DelayTimer" to="." method="_on_DelayTimer_timeout"]