40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
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;
|