issue in web game

[donjwan88]

Thank you for contributing to Armory!

Description
I have programmed a car game on PC and web but I was surprised that it works very well on PC but not very well on the web.

To Reproduce
Steps to reproduce the behavior.

Expected behavior
disappear material does not work
The sound works strangely in the main menu ( I used Node play sound )
save and load system does not work

System
Blender: 2.93.5
Armory: 2022.3.0
OS:
Graphics card: 1050

you can check my game here

web : https://yinv9db4fjvimpu2zwvyfw.on.drv.tw/www.car%20scape/
pc : https://drive.google.com/file/d/1w0qjXLzqFwRfJHoyaFkVGstuxuXdkmk9/view

[MoritzBrueckner]

Hi,

if possible can you please give some more information about the individual issues?

disappear material does not work

Can you please elaborate what "does not work" means and where it happens?

The sound works strangely in the main menu

Can you please share a screenshot of how the sound is triggered in the logic nodes? It sounds as if it is restarted as long as you hover over the buttons.

I also noticed that there is an audio related exeption when starting the level:

I'm not sure yet what causes it. If this exeption also happens on Krom it would be great if you could share it.

save and load system does not work

Which nodes are you using for that? The Write JSON node for example is only implemented on Krom currently, but using Write Storage should work.

[donjwan88]

disappear material does not work
Can you please elaborate what "does not work" means and where it happens?

sorry it is my mistake I mean visibility node dose not work but I think It dose not work because read and wright storage

Can you please share a screenshot of how the sound is triggered in the logic nodes? It sounds as if it is restarted as long as you hover over the buttons.

Which nodes are you using for that? The [Write JSON](https://github.com/armory3d/armory/wiki/reference_basic#write-json) node for example is only implemented on Krom currently, but using [Write Storage](https://github.com/armory3d/armory/wiki/reference_basic#write-storage) should work.

I am using read and Write storage

[MoritzBrueckner]

So the problem with the sound is indeed that the OnCanvasElement node output is activated on each frame that the mouse is over the element. The problem with the way Zui works (it's an immediate mode UI) is that it is not straightforward to find out if an element is hovered for the first time in a row, at least I don't know a good solution. If the element ID input would be static (no input socket, just a text field), we could implement this very easily in the node, but when it can potentially change every frame it gets tricky.

So I guess the best would be to check this manually, something like this could work (untested!):

It's probably best to use a node group here to be able to reuse the nodes for different buttons.

---

Can you also please share a screenshot of how you are using the read/write storage nodes? They work for me on html5. What does not work with them? Is it the read or the write? The NaN (not a number) when loading the values for the first time when no storage file exists (that's probably because you haven't set a default value and null is returned)?

[donjwan88]

didnt work

Can you also please share a screenshot of how you are using the read/write storage nodes? They work for me on html5. What does not work with them? Is it the read or the write? The NaN (not a number) when loading the values for the first time when no storage file exists (that's probably because you haven't set a default value and null is returned)?

[MoritzBrueckner]

didnt work

And what exactly didn't work? Sorry, but to be able to help you you need to provide more information.

The screenshots look totally fine to me (fine as in "bug free"), but they probably don't do what you want. I still don't know what you want to do (still no more information than "it doesn't work"), but it looks to me as if you never actually read the value from the storage into a variable, and you also get NaN values because you don't provide a default value in the Read Storage nodes that is used in case that the storage file doesn't yet exist (no saved progress yet).

I converted the issue into a discussion because it doesn't seem like a bug report. It may be converted back later if it turns out there actually is a bug.

[donjwan88]

thank you
I mean the sound did not work after you performed the steps that you explained in the nodes network . The same problem still occurs, the sound is repeated when the mouse is placed on the buttons

As for the web, so far, it still does not show any value in read storage, even after confirming that the engine should set an automatic value if it does not find any value in read storage.

[MoritzBrueckner]

Thanks :) You're right, apparently the Value Changed node doesn't do what I thought it would do. So I have a new tested solution now where it is manually checked whether the value has changed. Unfortunately the Output To Boolean node has a not-so-nice quirk so there is an additional Retain Value node needed, which had a bug that is now fixed if you update the SDK. Sorry that everything is so complicated :)

Here is the new working solution:

The boolean variable in the left box always holds the hover state of the last frame.
CanvasHover.zip

I will see if I can think of a way to add started/down/released states to the On Canvas Element node when hover is selected, but as I said it might not be that straightforward because the element input can theoretically change at any time.

---

As for the storage nodes, I still can't reproduce any issues with the storage system itself (using Firefox). Maybe you have already stored invalid data (e.g. NaN) in the browser's local storage which is read if you start the game? You can inspect and clear the local storage for a given URL but how you do that depends on the used browser. Otherwise it might help to once overwrite it with a value at init to fix your setup. After that the above should work and is Null should never run it's output unless you start the game for the first time without having saved anything.

Currently there is a bit of a weird behaviour for the read storage node. If there is no saved file, null is outputted, but if there is a save file but only the key ("gold storage" in your case) can't be found, the default value is returned. Do you think it is better if in both cases the default value would be used?