I guess the error come from the fact that PaddleHorizontal don't extends KinematicBody2D directly but there is a lot of logic that will be in common between the 2 types of Paddle. the one method that is different and should be override Public abstract class Paddle : KinematicBody2D PaddleInstance.Position = paddlePosition KinematicBody2D paddleInstance = (KinematicBody2D)_paddleScene.Instance() Private void AddPaddle(Vector2 paddlePosition)
Var script = GD.Load("res://src/scenes/entities/paddle/PaddleHorizontal.cs") _paddleScene = GD.Load("res://src/scenes/entities/paddle/Paddle.tscn") " Script inherits from native type 'KinematicBody2D', so it can't be instanced in object of type: 'PackedScene' " So I made one parent abstract class "Paddle" that contains the common logic, and two derived classes that extends Paddle "PaddleHorizontal" and "PaddleVertical" where the movements are different (one go up and down, the other go left and right).Īt the beginning, I want to create my paddles and attach correct script to each of them but I got this error But my paddles can be either horizontal either vertical. So, I want to share it for every Godot & GDScript enthusiasms and colleagues.I have a scene that is a Paddle (like the one in PONG game). It use simple syntax like that “Vector2(0, 0)”.įor me, I got many benefits from this categorization. It will then called _init() defined inside the class. Q: Why Vector2 and Node have different creation syntax?Ī: Because Node is a class. Q: Why bool, int, or float don’t have any methods to be called?Ī: Because they are primitive data types. For example:Ī: Because it is built-in data type not the class data type.
The benefit from categorization is to see clearer picture when using GDScript. To check whether it is a user-defined class, obj.get_script() might be used. For example, obj.get_class() always returns a native class name even if the object is a user-defined class. This categorization is useful because in some circumstances these two categories act differently. User-Defined class : classes created by users with the GDScript. Native class : classes created with C++ and mostly created by the Godot Framework/Library.Ģ. The Class data type can be further divided into:ġ. But it is not quite like a class because it does not have inheritance and not use “new()” to create an instance. Why this category could be called class-like. For example, writing “Vector2(0,0).length()” is allowed. Non-Primitive (or Class-Like) : contains some methods. There is no any methods for these data types.Ģ. Written “5.some_method()” is not allowed. This category consists of 4 data types: null, bool, int and float. Primitive : contains no method to be called. It is categorized based on “Methods Containing”.Īnother way to categorize the built-in data type is whether they contain methods or not.ġ. For example, Vector2 contains x and y as floating points. This category consists of 5 data types: null, bool, int, float, and String.Ģ. Atomic : contains no further data element. The built-in data type can be further divided into:ġ.
So, the first step is to categorize the data types into two groups : Other data type such as String, Vector2, int, float, etc. The first criteria of the categorization is Inheritance. How could we divided these types into categories based on usages. The categorization (highlighted) was added by this article’s author.įrom the Godot source code, the Variant class defines 27 type codes:Ġ for null, 1 for bool, 2 for int, …, 26 for PoolColorArray. The Type enum defined in the Variant class. The referenced information was based on Godot 3.0.6 stable version and GDScript 3.0 Document. So, in this article, I want to share what I have done. I have categorized each GDScript data types and found it is useful for understanding many behaviors. I’m currently learning the Godot Game Engine and GDScript programming by myself.
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