Force re-run System in the same frame

Is it possible? Do you know any hacks to achieve that?
I need to run UICanvasSystem while my system is working, to update actual canvas size and then immediately continue my code.

 

You mean you want to return to the Update function at some point in code and then loop through again without returning a second time? Could you show an example of what exactly you want to achieve?

 

I guess you could divide your system into two systems. Then you can run your first system (which contains first half of your code) then run the UICanvasSystem, and then run your second system (which contains the second half of your code). This would require you to store the data used in the first system however, if you have any, to be used in the second system.

 

Pakor, yes, you're right.

I have System A that doing two things:

1) It determines current aspect ratio of the screen and aspect ratio of Canvas. If we have screenAspectRatio > canvasAspectRatio, it sets
canvas.matchWidthOrHeight to 1, otherwise it sets canvas.matchWidthOrHeight to 0.
So, I want to achieve the behavior of Canvas like it works in Unity3d.

2) Second, it fills the empty space between screen and Canvas content with some sprite. Unfortunately, I can't get an actual size of Canvas on this step, because it should be recalculated after the previous step applied.

So, I want to run first step, then run UICanvasSystem (to update Canvas real size), then run second step.

Currently, I use a workaround to achive such behavior:

1) I do step 1.
2) I do step 2 but I assume the size of image is half of Canvas (it's a value that enough to fill entire space almost in all cases).
3) I wait for next frame.
4) I do step 2 for the updated size of Canvas

Also, I have added

Code (JavaScript):

1. @ut.executeAfter(ut.Shared.UserCodeEnd)
2. @ut.executeBefore(ut.Shared.PlatformRenderingFence)

to my system, but I'm not sure there is a sense.

Zionisias, I agree, it may be a good decision. But how can I run UICanvasSystem from my code?
I try to call it from current scheduler:

Code (JavaScript):

1. this.scheduler.schedule(ut.UILayout.UICanvasSystem);

but it looks like it's not working. I get the following assertion while executing such code:

Code (JavaScript):

1. Uncaught abort("Assertion failed: !item.system, at: C:/Users/Abdul/Documents/tiny/Runtime/modules/core/src/Scheduler.cpp,51,"). Build with -s ASSERTIONS=1 for more info.

Sorry for my awful english.

 

Scheduling systems is done by Unity Tiny itself, but you can indeed use executeAfter and executeBefore. For the solution I proposed, you should add the executeBefore to your first system:

Code (CSharp):

1. @ut.executeBefore(ut.UILayout.UICanvasSystem)
2. export class ExampleSystem extends ut.ComponentSystem {

And the executeAfter to your second system:

Code (CSharp):

1. @ut.executeAfter(ut.UILayout.UICanvasSystem)
2. export class ExampleSystem2 extends ut.ComponentSystem {

I can not 100% guarantee that this will work, but in theory it should.

You could check the bottom part of the main.js file in your browser console under "sources", where all systems are scheduled. Search for your systems, and check if UICanvasSystem is scheduled in between the two.

 

Thank you very much, Zionisias.
It works perfect.

Also, special thanks for clue about order of systems in generated file. Now, some things become clear for me.