GeoJsonPrimitive

Examples:

// Load GeoJSON
const loader = await Cesium.GeoJsonPrimitive.fromUrl("./data.geojson");
viewer.scene.primitives.add(loader);

// Access GeoJSON features and properties
loader.points;     // BufferPointCollection | undefined
loader.polylines;  // BufferPolylineCollection | undefined
loader.polygons;   // BufferPolygonCollection | undefined
loader.ids;        // source feature IDs
loader.properties; // source feature properties

// Style GeoJSON
const material = new Cesium.BufferPolylineMaterial({
  color: Cesium.Color.RED,
  width: 4,
});

const polyline = new Cesium.BufferPolyline();
const count = primitive.polylines.primitiveCount;
for (let i = 0; i < count; i++) {
  primitive.polylines.get(i, polyline);

  const properties = primitive.getProperties(polyline.featureId);
  if (properties.myCustomProperty === true) {
    polyline.setMaterial(material);
  }
}