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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | 1655x 1655x 1354x 301x 301x 301x 24x 277x 45x 277x | import defined from "../Core/defined.js";
import hasExtension from "./hasExtension.js";
/**
* Check if a content has metadata, either defined in its metadata field (3D Tiles 1.1)
* or in the <code>3DTILES_metadata</code> extension. If so, look up the group with the
* corresponding ID.
*
* @function
*
* @param {Cesium3DTileset} tileset The tileset to query for group metadata
* @param {object} contentHeader the JSON header for a {@link Cesium3DTileContent}
* @return {GroupMetadata} the group metadata, or <code>undefined</code> if not found
* @private
* @experimental This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
*/
function findGroupMetadata(tileset, contentHeader) {
const metadataExtension = tileset.metadataExtension;
if (!defined(metadataExtension)) {
return undefined;
}
const groups = metadataExtension.groups;
const group = hasExtension(contentHeader, "3DTILES_metadata")
? contentHeader.extensions["3DTILES_metadata"].group
: contentHeader.group;
if (typeof group === "number") {
return groups[group];
}
const index = metadataExtension.groupIds.findIndex(function (id) {
return id === group;
});
return index >= 0 ? groups[index] : undefined;
}
export default findGroupMetadata;
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