ALINE Label3D not visible on Android

ALINE
#1

When using Label3D in the unity editor, all is working as expected. But as soon as I make a build for android using Vulkan graphics API, the 3d label isn’t displayed. I didn’t see any errors or other issues with the rendering.

Lines and other primitive shapes work as expected.

I also noticed that the Label3D is not burst compatible (inside of an ISystem) even when used with a FixedString.

Any Advice would be appreciated.

#2

Hi

Do you see any errors when clicking on the shader assets in Unity?

It should be supported. Make sure you pass the FixedString using ref.

#3

Thank you Aron for answering so promptly (as always :smiling_face:)

The error during complication I get is the following:

.\Library\PackageCache\com.unity.collections@2.1.0-pre.6\Unity.Collections\FixedStringAppendMethods.cs(417,17): Burst error BC1016: The managed function `System.String.get_Length(System.String* this)` is not supported

This bubbles up from the ALINE drawing code.

Now if this is a burst bug or not I’m not sure.

Any idea why the rendering on android seems not to work only for the text labels (all other primitives work)

Code I used to draw:

var text = new FixedString512Bytes("Frank");

drawing.Label3D(position + math.up() * 0.3f, transform.WorldRotation,
                        ref text, 0.2f, LabelAlignment.Center,
                        Color.black);
#4

After further testing, Label3D works as expected.

For some reason, unity had a build artifact, and after deleting the build folder and building again from scratch all is working.

So the only issue is with the burst compiler.

#5

Hi

Great that it works now!

When creating fixed strings in burst you need to use the following syntax:

FixedString512Bytes = "Frank";

to allow the burst compiler to allocate it without using a managed string.

#6

:man_facepalming: thank you @aron_granberg. Indeed how could I overlook that?

Now all is working fully bursted!

I just wish we could use DrawingManager.GetBuilder(true); also fully bursted :wink:, but that isn’t supported correct?

#7

Great!

No, that is not supported, I’m afraid. Due to Unity limitations, I cannot guarantee that this would be thread-safe.

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