Metadata GLTF2.0 in Cesium 2.7.0

[m.kwiatkowski]

I’m trying to migrate my buldings with Metadata to UE5.4 and Cesium 2.7.0, but Property tabel in Shader gets strange numbers.

All works fine in Cesium 2.0. I tested it here:

glTF2.0 in UE5.2, metadata "EXT_structural_metadata", "EXT_mesh_features"

Now trying to find a working example in UE with EXT_mesh_gpu_instancing. Just wanted to give a headsup that EXT_mesh_gpu_instancing is not currently supported in Cesium for Unreal. There was a Github PR to add support, but it has not had any updates in years, and we don’t have a time estimate for when we will properly address it. Apologies for the inconvenience.

Test model have 3 Box 0,1,2:

ID	Cesium#Height	elemntID
0	10	0
1	30	1
2	50	2

estimate#Height is Flot32
elemttID is Int32

The metadata is 100% good, because I can list it using linetrace:

Here is print with Log:

Attribute Table works fine:

unfortunately my metadata cesium#height and elementID give strange values in Shader.

My queastion is:

1. How to correctly transfer values ​​from metadata to the shader in Cesium 2.7.0?
2. Is this a bug or maybe I need to set something in the new cesium?

[Kevin_Ring]

If I’m reading your material graph correctly, it’s setting the Base Color to “red” when the Feature ID is zero, and to “black” otherwise. And that is what I see in the Result screenshot as well (assuming the smallest pillar has a feature ID of zero). Can you elaborate on what problem you’re seeing?

[m.kwiatkowski]

the problem is with the metadata, but only in shader.

My Test example.
baza_L12X2263Y1642_building.zip (546.8 KB)

I created buildings with metadata in LAT: 54,336922 LNG: 18,939122.
Metadata Name:

“ETC#estimatedHeight” - float 32 , “ETC#typeBuldings” - uint8, “ETC#material”- uint8, “ETC#IDtexture”- uint8

this metadata are connected to the attribute table (Feature ID).
In my case Feature ID even are walls. Feature ID odd are roof. All roofs have ETC#estimatedHeight = 0.

When I try to highlight all meshes whose height is 0 (all flat roofs), I get nothing:

But when I try highlight all roof from Feature ID (all roof are odd), all works fine:

But in ETC#estimatedHeight are random number. Look this example:

some roofs are red even though all roofs have the same value of 0.

When I use linetrace, all metadata are correct. When I hit in roof my log:

This metadata works fine in Cesium 1.31 and 2.0.

[Kevin_Ring]

Can you please share how you’ve configured the metadata component on the tileset?

[m.kwiatkowski]

How I add this metadata in Ceisum 2.7

1. Add CesiumFeaturesMetadata to Tileset:
   
   
2. Refresh model:
   
3. Click Auto Fill:
   
4. Check Property Tables:
   
   
5. Generate Material:
   

Probable problem is here, becouse it is new:

In Cesium 1.31 looks diffrent:

[Kevin_Ring]

I’m using your tileset, and trying to reproduce the problem you’re seeing. I set up my material layer like this:

And I get a view like this:

Which I think is behaving correctly. The roofs all have an estimated height of 0.0, so they’re red, while the walls have various values greater than 0.2 so they’re black.

I didn’t change any of the metadata component values from their defaults after the Auto Fill. The estimated height property looks like this:

If that all seems right so far, but it isn’t working for you, maybe it’s worth checking out how you set up your material. Mine looks like this:

It’s very important that the top material layer be named exactly FeaturesMetadata. I don’t think that would cause the seemingly random values that you’re seeing, but it’s worth checking.

[m.kwiatkowski]

THX ! Here is problem:

I use Metadata, in new version is FeaturesMetadata!

Now all works fine! Thx again