39 lines
1.3 KiB
GDScript
39 lines
1.3 KiB
GDScript
## Cradle — rocks with a pendulum rotation when tapped.
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class_name Cradle extends Node2D
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enum State { IDLE, ROCKING }
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const ROCK_ANGLE: float = 15.0
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const ROCK_DURATION: float = 0.5
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const BUTTON_HALF_SIZE: float = 80.0
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var _state: State = State.IDLE
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func _input(event: InputEvent) -> void:
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if _state != State.IDLE:
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return
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var screen_pos: Vector2
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if event is InputEventScreenTouch and event.pressed:
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screen_pos = event.position
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elif event is InputEventMouseButton and event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
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screen_pos = event.position
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else:
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return
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var canvas_transform: Transform2D = get_viewport().get_canvas_transform()
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var world_pos: Vector2 = canvas_transform.affine_inverse() * screen_pos
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var local_pos: Vector2 = to_local(world_pos)
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if abs(local_pos.x) <= BUTTON_HALF_SIZE and abs(local_pos.y) <= BUTTON_HALF_SIZE:
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_start_rocking()
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func _start_rocking() -> void:
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_state = State.ROCKING
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var tween: Tween = create_tween()
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tween.set_ease(Tween.EASE_IN_OUT)
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tween.set_trans(Tween.TRANS_SINE)
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tween.tween_property(self, "rotation_degrees", ROCK_ANGLE, ROCK_DURATION)
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tween.tween_property(self, "rotation_degrees", -ROCK_ANGLE, ROCK_DURATION)
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tween.tween_property(self, "rotation_degrees", 0.0, ROCK_DURATION * 0.5)
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tween.finished.connect(func() -> void: _state = State.IDLE)
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