#+title: Section 05 - Lesson 07 | Plane Jump Movement
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* Links
- [[../../toc.org][TOC - Godot Notes]]
- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/49010965#overview][S05:L07 - video]]

* Notes
** making the plane jump
- input action
- jump const / variable
- ONLY at the initial touch of jump, adjust the jump velocity

** add jump
- create const variable to represent JUMP-POWER
- add an action input
  - Project->Project Settings-> Input Map
  - in the "add new action" textbar enter the action name (jump)
  - hit the +Add button to the right of the "add new action" field


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    file:../../_share/media/img/albert/section-05/lesson-07/ex01.png

- add event to action
  - hit the + to the right of the action name

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    file:../../_share/media/img/albert/section-05/lesson-07/ex02.png

  - an event configuration dialog pops up, you can hit the keypress or choose whatever input will activate the action

** add code to check for the input
- in ~_physics_process~
- check for ~Input.is_action_just_pressed("name of action")~
- and set ~velocity.y = JUMP_POWER~
  - physics engine will take care of the velocity changing due to gravity and distance

#+begin_src gdscript
func _physics_process(delta: float) -> void:
	velocity.y += _gravity * delta

	if Input.is_action_just_pressed("jump") == true:
		velocity.y = JUMP_POWER

	# note we call move and slide over here to get the physics engine
	# to make it's calculations
	move_and_slide()
#+end_src