75 lines
2.8 KiB
Org Mode
75 lines
2.8 KiB
Org Mode
#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../../../../../../_share/media/css/org-mode.css" />
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#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../../_share/media/css/godot.css" />
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#+title: Section 03 - Lesson 11, 12 | Signals, Custom Signals
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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/45070477#announcements][S03:L22.11 - Signals]]
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- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45070479#announcements][S03:L23.12 - Custom Signals]]
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* Notes
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** Signals
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- messaging system
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- way of communicating between nodes
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*** connect basics
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- means of connecting
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- ide
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- code
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- the node giving the signal has a list of everyone that connected
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*** connecting via ide
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1. select Node panel on leftside, and then select the approrpiate signal
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-
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#+ATTR_HTML: :width 600px
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[[file:../../../_share/media/albert/img/section03/S03_L11_EX01.png]]
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2. double click the selected filter
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- options available:
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- from signal
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- connect to script
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- receiver method
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- you can also click on "Pick" next to receiver method so that you can choose a different method that already exists
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3. click connect and the boilerplate code will appear in the script you had selected in the signal creation pane above in (2)
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- if you look at the node pane on the right and scroll to the signal, you'll see a green indicator showing that you have connected that signal (to something)
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-
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#+ATTR_HTML: :width 300px
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[[file:../../../_share/media/albert/img/section03/S03_L11_EX02.png]]
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- similarly, you can see a green icon by the function in the code editor
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-
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#+ATTR_HTML: :width 600px
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[[file:../../../_share/media/albert/img/section03/S03_L11_EX03.png]]
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** Custom Signals
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*** declare the signal
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to create a signal, use the following format:
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#+BEGIN_SRC godot
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signal name_of_signal
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#+END_SRC
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*** activate the signal
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#+BEGIN_SRC godot
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name_of_signal.emit()
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#+END_SRC
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*** register to signal
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- go to the scene you want to attach the signal to
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- pick the node
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- the signal should be available under Inspector->Node->Signals
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- connect the signal, and give the function a name you want, this will be your receiver function
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- if you want to attach another node to the same receiver function, use "pick" when connecting the signal
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-
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#+ATTR_HTML: :width 700px
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[[file:../../../_share/media/albert/img/section03/S03_L12_EX01.png]]
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- if you have more than one node connected to a receiver function you can see which are connected by clicking on the green icon next to the receiver function
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-
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#+ATTR_HTML: :width 600px
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[[file:../../../_share/media/albert/img/section03/S03_L12_EX02.png]]
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