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1.142

ByteDance-Seed/SeedVR1.142Jun 1, 2026by lukemckinstry

AI Summary

CesiumJS 1.142 introduces performance optimizations for large datasets and new visualization capabilities, including support for Mapbox Vector Tiles and CAD-style edge rendering.

Key Highlights

  • `GeoJsonPrimitive` for loading GeoJSON directly into BufferPrimitiveCollections
  • `MVTDataProvider` for loading Mapbox Vector Tiles as 3D Tiles
  • `blendOption` constructor parameter for alpha blending support
  • Experimental support for `EXT_mesh_polygon` and `3DTILES_content_gltf_vector` extensions
  • `EdgeDisplayMode` enum for CAD-style wireframe rendering

New Features

  • Direct GeoJSON loading bypassing entity/DataSource layer
  • Per-feature styling via `Cesium3DTileStyle`
  • Feature picking with metadata
  • Automatic property table encoding via `EXT_structural_metadata`

Full Release Notes

1.142 - 2026-06-01

Highlights include:

- Added `GeoJsonPrimitive` for loading GeoJSON directly into `BufferPrimitiveCollections`, bypassing the entity/DataSource layer for significantly improved performance with large datasets. https://github.com/CesiumGS/cesium/pull/13505
- Added `MVTDataProvider` for loading Mapbox Vector Tiles (MVT) directly into CesiumJS as 3D Tiles. Supports per-feature styling via `Cesium3DTileStyle`, feature picking with metadata (`getProperty`), and automatic property table encoding via `EXT_structural_metadata`. https://github.com/CesiumGS/cesium/pull/13404
- Added `blendOption` constructor parameter to `BufferPointCollection`, `BufferPolylineCollection`, and `BufferPolygonCollection`, supporting `BufferPrimitiveMaterial#color.alpha`. Added support for `BufferPrimitiveMaterial#outlineColor.alpha` to `BufferPointCollection`. https://github.com/CesiumGS/cesium/pull/13384
- Added experimental support for `EXT_mesh_polygon` draft glTF extension and `3DTILES_content_gltf_vector` draft 3D Tiles extension. https://github.com/CesiumGS/cesium/pull/13478
- Added `EdgeDisplayMode` enum and `edgeDisplayMode` property to `Model` and `Cesium3DTileset` for controlling how edges from the https://github.com/KhronosGroup/glTF/pull/2479 glTF extension are rendered. Supports three modes: `SURFACES_ONLY`, `SURFACES_AND_EDGES`, and `EDGES_ONLY` (CAD-style wireframe rendering). https://github.com/CesiumGS/cesium/pull/13192


See the [changelog](https://github.com/CesiumGS/cesium/blob/1.142/CHANGES.md) for the complete list of changes.