#+title: Section 03 - Lesson 09, 10 | Export annotation, Moving the Paddle
#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../../_share/media/css/godot.css" />

* Links
- [[../../toc.org][TOC - Godot Notes]]
- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45070473?start=15#announcements][S03:L18.09 - Export annotation]]
- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45070475#announcements][S03:L20:10 - Moving the Paddle]]

* Notes

** Export Annotation

annotation allows you to add property to the inspector on a node

*** format
#+BEGIN_SRC godot
@export var VARIABLE_NAME: TYPE = VALUE
#+END_SRC

this allows you to reference the property directly within the script attached to the node

** Setting up an Input System
*** add inputs
- Menu->Project->Project Settings-> [Input Map]
- click on "show built-in actions"
  #+ATTR_HTML: :width 600px
  [[file:../../../_share/media/albert/img/S03_L10_EX01.png]]

- create an action
  - type in the name of the action in Add New Action
  - click +Add

  #+ATTR_HTML: :width 600px
  [[file:../../../_share/media/albert/img/S03_L10_EX02.png]]

- assign a key
  - select the action
  - click the '+' button to the right
  - type or select the appropriate key

  #+ATTR_HTML: :width 300px
  [[file:../../../_share/media/albert/img/S03_L10_EX03.png]]

*** detecting the input
- we use these:
  - Input.is_action_just_pressed
  - Input.is_action_just_released
  - Input.is_action_pressed

- just_pressed detects only the initial press of the button.  a lot of times you hit the button and the computer will detect it multiple times.
- so make sure you DO NOT use just_pressed, use action_pressed!

** get axis
instead of using if statements, you can use Input.get_axis

this takes two actions, and determines if they are both pressed at the same time, or if only 1 is pressed

Input.get_axis("left", "right")  will return a value of -1, 0, 1