76 lines
1.9 KiB
Org Mode
76 lines
1.9 KiB
Org Mode
#+title: Section 03 - Lesson 30 | Section Review
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#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../../_share/media/css/godot.css" />
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* Links
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- [[../../toc.org][TOC - Godot Notes]]
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- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45070537#overview][S03:L42.30 - Section Review]]
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* Notes
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** paddle scene
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*** node composition
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- root: Area2D
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- Sprite2D
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- CollisionShape2D
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*** script view: paddle.gd
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- extends Area2D
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**** use *@export* to create speed variable
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- can be modified in Inspector
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- give default value
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**** override _process function
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- check if =Input.is_action_pressed=
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- is 'left'
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- is 'right'
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- move paddle
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- get the Node2D.position property
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- multiply speed by delta and add or subtract it from position.x
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- delta is number of seconds that elapsed since the previous frame
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** gem scene
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*** node composition
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- root: Area2D
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- Sprite2D
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- CollisionShape2D
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*** script view: gem.gd
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- extends Area2D
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**** set class name
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- =class_name Gem=
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- this allows us to instantiate Gem objects in scripts
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**** set a signal property
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- =signal on_gem_off_screen=
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- allows us to attach listeners who will be notified when we emit a signal
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**** set export property
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- =@export var speed=
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- lets us set the speed in the Inspector
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*** modify _process
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**** determine if the gem has gone out of bounds
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- this is going to be the edge of the viewport
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- check position property against the viewport rect property
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#+begin_src gdscript
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if position.y > get_viewport_rect().size.y
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#+end_src
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**** if gem went out of bounds
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***** emit signal
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#+begin_src gdscript
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on_gem_off_screen.emit()
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#+end_src
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***** stop the gem and remove it from the node tree
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- stop going through the process function
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- delete node at the end of the current frame
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#+begin_src gdscript
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set_process(false)
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queue_free()
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#+end_src
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** Game scene
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