How can I learn how to migrate old GDscript code to new Godot engines?

Question

Hello,

Could you please point me in the right direction to find the resources which will help me migrate old GDscript code to a newer version. (I am new to coding)

Example, I did a tutorial on YouTube to "Make a Space Shooter" and the instructor used Godot 2.x, I wish to convert it to a newer Godot engine and make changes. I could not find much info on the errors I am encountering and wish to learn how to do the migration.

I often find tutorials which are not using the latest Godot version and wish to migrate the code to one of the newer Godot engines.

Some conversions are easy, ie. getpos = getposition but others more cryptic like func findnode(node):
Function signature doesn't match the parent. Parent signature is: 'Node findnode(String, bool=default, bool)'

Reference: Make a Space Shooter Game in Godot
URL: https://www.youtube.com/watch?v=EteQMVK2joI

Also, would using GDNative code like C, C++, C# be a decent workaround?

Thanks for any advice you can give,
GodotUser

Answer 1

For 2.x to 3
I have found this: Migration notes Godot 2 -> Godot 3 (found here)

Basically the the most important change was the way of how to access variables and nodes:

2.x:  get_node("NodeName").get_position()
      get_node("NodeName").set_position(new_position)
3.x:  $NodeName.position

For 3.0 -> 3.1:
See this question for more information:
Is there anything special to know to migrate a project from 3.0 to 3.1?

If you have more time you can look at the release-post. The biggest change for gdscript was of course optional typing.

Hope that gave you some hints,
Jowan-Spooner

Comments

Thanks for the information.

I changed the first findnode to findparent as seen below:

func findparent(node):
return self.mainnode.find_node(node)
pass

• not sure why the author chose to use pass in addition to code in the function, I left it as is. FYI, * these early issues I hit are in the utils.gd provided here.

My change above "appeared" to resolve the issue , then hit another issue:
var mainnode setget , _getmainnode
var viewsize setget , getviewsize
var mousepos setget , getmouse_pos

Still researching it. =D

I just bought the Udemy course "Discovering Godot..." so I can learn more about how gdscript works =D

Answer 2

if you haven't done it yet take a look here:

https://github.com/dploeger/godot-migrationnotes

Regards.
-j