VCTR Polygon, Point data processing and visualize

Tom_Lee · August 25, 2025, 9:54am

for VCTR (Polygon, Point)

spec document:
https://github.com/CesiumGS/3d-tiles/tree/vctr/TileFormats/VectorData

I uploaded PRs for VCTR Polygon, Point data processing and visualize.

github.com/CesiumGS/cesium-unity

vctr data processing and do mesh extrusion for visualizing

main ← tomlee-dev:supporting-vctr

opened 09:17AM - 25 Aug 25 UTC

tomlee-dev

+414 -2

## Description for VCTR (Polygon, Point) spec document: https://github.co…m/CesiumGS/3d-tiles/tree/vctr/TileFormats/VectorData for polygon mesh extrusion works min height -200m and max height 1000m from geoide 0 height.(hard coded) and for Point. there is no mesh for this just cesium globe anchor, mesh filter with one vertex mesh, and mesh renderer(I thought about this but I don't have best idea about this. adding sphere mesh to render? maybe better idea) for Polyline. I've not finished implementing this yet. I don't have clear time line (FYI) for testing this. use with other PR code. https://github.com/CesiumGS/cesium-native/pull/1228 https://github.com/CesiumGS/cesium-unity/pull/601 ## Issue number or link ## Author checklist - [x] I have submitted a [Contributor License Agreement](https://github.com/CesiumGS/community/tree/main/CLAs) (only needed once). - [x] I have done a full self-review of my code. - [ ] I have updated `CHANGES.md` with a short summary of my change (for user-facing changes). - [ ] I have added or updated unit tests to ensure consistent code coverage as necessary. - [ ] I have updated the documentation as necessary. ## Testing plan for VCTR Polygon testring (URP) http://localhost:8080/Apps/SampleData/Cesium3DTiles/Vector/VectorTilePolygons/tileset.json http://localhost:8080/Apps/SampleData/Cesium3DTiles/Vector/VectorTilePolygonsBatchedChildrenWithBatchTable/tileset.json 1. build this PR with other PR code after that we can get com.cesium.unity-{version number}.tgz in CesiumForUnityBuildProject folder. ( https://github.com/CesiumGS/cesium-native/pull/1228, https://github.com/CesiumGS/cesium-unity/pull/601 ) 2. git clone Cesium Unity Samples repo ( https://github.com/CesiumGS/cesium-unity-samples.git ) 3. unpack built tgz file to cesium-unity-samples\Packages\com.cesium.unity folder (overriding) 4. git clone cesiumjs repo ( https://github.com/CesiumGS/cesium.git ) 5. move Vector folder to Apps/SampleData/Cesium3DTiles folder 6. build ( "npm install" and "npm run build") 7. local run ( "npm start" ) 8. open Cesium Unity Samples repo with Unity Editor and open 02_CesiumMelbourne scene 9. set CesiumGeoreference and Cesium Globe Anchor of DynamicCamera lot, lat, height (0, 0, 3000) 10. change Tileset Source to "FromUrl" and change url for each test by referencing above for Cesium3DTileset component in Melbourne Photogrammetry game object. 11. set material from other PR( https://github.com/CesiumGS/cesium-unity/pull/601 ) to Opaque Material in Cesium3DTileset component in Melbourne Photogrammetry game object. and change rendering setting ( AddRendererFeature and other things follow instruction in other PR page, https://github.com/CesiumGS/cesium-unity/pull/601) <img width="1359" height="991" alt="image" src="https://github.com/user-attachments/assets/fce678f5-c8bc-45c0-bd33-ad8391eec740" /> for VCTR Point testing. http://localhost:8080/Apps/SampleData/Cesium3DTiles/Vector/VectorTilePoints/tileset.json http://localhost:8080/Apps/SampleData/Cesium3DTiles/Vector/VectorTilePointsBatchedChildrenWithBatchTable/tileset.json 1~10 are same of VCTR Polygon testing 11. check to set true of Show Tiles in Heirachy in Cesium3DTileset component in Melbourne Photogrammetry game object. 12. in child objects of Melbourne Photogrammetry game object. replace mesh filter to "Sphere" mesh and change value of scale of game object transform to 100, 100, 100 <img width="1357" height="968" alt="image" src="https://github.com/user-attachments/assets/5a511ed5-ef9c-4664-a5e6-b78db2e84bfb" />

github.com/CesiumGS/cesium-native

Add gltf converting for vctr

main ← tomlee-dev:add-gltf-converting-for-vctr

opened 08:57AM - 22 Aug 25 UTC

tomlee-dev

+2057 -5

for VCTR (Polygon, Point) for polyline, I am not yet done checking(I mean deb…ug). I am pretty sure polyline processing is not working properly and for Point. (has only one vertex, I thoght about this I haven't come up with better idea. I think it would be better to handle it appropriately depending on the engine.) I don't have clear time line for Polyline (FYI) spec document: https://github.com/CesiumGS/3d-tiles/tree/vctr/TileFormats/VectorData

My colleague llcrowe( lLcrowe-dev · GitHub ) worked on this for stencil shadow volume rendering technique in Unity in order to visualize VCTR

it is also uploaded as a PR

github.com/CesiumGS/cesium-unity

StencilShadowVolume.Shader from CesiumJS to Unity

main ← lLcrowe-dev:feature/StencilShadowVolume

opened 09:16AM - 21 Aug 25 UTC

lLcrowe-dev

+131 -0

Ported the stencil shadow volume shader from CesiumJS to Unity (For URP). suppo…rt for stencil shadow volume rendering technique in order to render vector shapes visualize on terrain. (My colleague @TomLeeLive is planning to do PR for VCTR polygon mesh processing, and it would work well together with this functionality.) Instruction. **Follow this Step** //Project Setting 1. In ProjectSetting >> Graphics >> ScriptableRenderPipelineSetting 2. Select SRPSetting >> Rendering >> index0 (UniversalRendererData) 3. AddRendererFeature >> Add 2 more "RenderObjects (Experimental)" A, B 4. Set A B RenderObjects >> Layer Mask >> "Everything" 5. A RenderObjects >> Filters >> LightMode Tags >> Add "Step1" 6. B RenderObjects >> Filters >> LightMode Tags >> Add "Step2" 7. Sort this role A(Step1), B(Step2) //Create Material 1. In Shader "CesiumToUnityStencilShadowVolume" 2. Select And RightMouseClick >> Create >> Material 3. Choose Color // Use case example 1. Return the Scene. And Create cube. 2. Apply the Material(CesiumToUnityStencilShadowVolume) To the cube >> Set Scale (1, 20, 1) 3. Create Other Cube >> Set Scale (100, 1, 100) 5. Select Apply the Material cube >> Overlap the two cube

test scene capture image is here below( with VCTR polygon test data )

I’ve not tested with cesium ion asset tileset (5737) in the example below. I have no idea how to load it in Unity. I expect that it will work well too

Kevin_Ring · August 27, 2025, 1:14am

Thank you both for all your work on these PRs, and for sharing them with the community!

Tom_Lee · August 27, 2025, 1:28am

Thanks! It’s my pleasure.

I’d appreciate it if you could review the PR!

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VCTR Polygon, Point data processing and visualize

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