extends SceneTree

var player
var saved_collision

func _initialize() -> void:
    _build_scene()


func _iteration(delta: float) -> bool:
    match Engine.get_physics_frames():
        0:
            # Move and save collision info.
            var collision = player.move_and_collide(Vector3.DOWN)
            saved_collision = collision
            print("[Frame 0] Saved collision: ", saved_collision)

        1:
            # Generate another collision info.
            var collision = player.move_and_collide(Vector3.DOWN)
            print("[Frame 1] Collision: ", collision)

        2:
            print("[Frame 2] Deleting player...")
            player.queue_free()
            player = null

        3:
            print("[Frame 3] Trying to access freed shape...")
            print(saved_collision.get_local_shape())
            quit()
    
    return false


func _build_scene() -> void:
    # A sphere on the top of a box.
    _build_player()
    _build_floor()


func _build_player() -> void:
    var shape = SphereShape.new()

    var body = KinematicBody.new()
    body.position = Vector3(0, shape.radius, 0)

    var collision = CollisionShape.new()
    collision.shape = shape
    body.add_child(collision)

    root.add_child(body)
    player = body


func _build_floor() -> void:
    var shape = BoxShape.new()

    var body = StaticBody.new()
    body.position = Vector3(0, -shape.extents.y, 0)

    var collision = CollisionShape.new()
    collision.shape = shape
    body.add_child(collision)

    root.add_child(body)

extends SceneTree

var player
var saved_collision

func _initialize() -> void:
    _build_scene()


func _iteration(delta: float) -> bool:
    match Engine.get_physics_frames():
        0:
            # Move and save collision info.
            player.move_and_slide_with_snap(Vector3(1, -1, 0) * delta, Vector3.DOWN)
            var collision = player.get_slide_collision(0)
            saved_collision = collision
            print("[Frame 0] Saved collision: ", saved_collision)

        1:
            # Generate another collision info.
            player.move_and_slide_with_snap(Vector3(1, -1, 0) * delta, Vector3.DOWN)
            var collision = player.get_slide_collision(0)
            print("[Frame 1] Collision: ", collision)

        2:
            print("[Frame 2] Deleting player...")
            player.queue_free()
            player = null

        3:
            print("[Frame 3] Trying to access freed shape...")
            print(saved_collision.get_local_shape())
            quit()

    return false


func _build_scene() -> void:
    # A sphere on the top of a box.
    _build_player()
    _build_floor()


func _build_player() -> void:
    var shape = SphereShape.new()

    var body = KinematicBody.new()
    body.position = Vector3(0, shape.radius, 0)

    var collision = CollisionShape.new()
    collision.shape = shape
    body.add_child(collision)

    root.add_child(body)
    player = body


func _build_floor() -> void:
    var shape = BoxShape.new()

    var body = StaticBody.new()
    body.position = Vector3(0, -shape.extents.y, 0)

    var collision = CollisionShape.new()
    collision.shape = shape
    body.add_child(collision)

    root.add_child(body)