Add a option to drawning

[kopeek]

Describe the project you are working on

I'm was working on a project that used drawning, but I stopped

Describe the problem or limitation you are having in your project

I could use Line2D but I didn't used, I wanted to use draw functions etc. and I wanted to draw something next frame, but It cleared the whole drawning

Describe the feature / enhancement and how it helps to overcome the problem or limitation

I want to Godot have an option, to just draw something without calling queue_redraw(), that's it

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

I can be passe like an argument (If I want to queue_redraw() or not)

If this enhancement will not be used often, can it be worked around with a few lines of script?

In my opinion it can be easly done

Is there a reason why this should be core and not an add-on in the asset library?

This is about improving 2D games

[Calinou]

Moved to discussion, as there is no concrete technical implementation provided.

Can you describe in more detail what this would be used for? Why is calling queue_redraw() a problem, and what issues did you encounter when using the existing custom 2D drawing functions?

[kopeek]

I can't draw something different in different time, without it refreshing and clearing the drawnings, that's a problem that I encounter, It should be an option If I want to refresh or not

[Calinou]

I believe you should be able to draw within a SubViewport whose Clear Mode property is set to Never.

[KoBeWi]

I assume your problem is that _draw() method can only be called after again by using queue_redraw()?
You can workaround this limit by using RenderingServer methods directly, e.g. instead of draw_rect() use canvas_item_add_rect(). You can call it outside _draw(), but keep in mind that redrawing the node (with queue_redraw() or visibility change) will still clear it.

[CarpenterBlue]

Maybe having queue_redraw() without clearing the screen could be handy.
Perhaps queue_overdraw()? Just queue_draw() would likely be confusing.