初始化

src/gltf2glb/removeExtensionsRequired.js

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+'use strict';
+const Cesium = require('cesium');
+
+const defined = Cesium.defined;
+
+module.exports = removeExtensionsRequired;
+
+/**
+ * Removes an extension from gltf.extensionsRequired if it is present.
+ *
+ * @param {Object} gltf A javascript object containing a glTF asset.
+ * @param {String} extension The extension to remove.
+ *
+ * @private
+ */
+function removeExtensionsRequired(gltf, extension) {
+    const extensionsRequired = gltf.extensionsRequired;
+    if (defined(extensionsRequired)) {
+        const index = extensionsRequired.indexOf(extension);
+        if (index >= 0) {
+            extensionsRequired.splice(index, 1);
+        }
+        if (extensionsRequired.length === 0) {
+            delete gltf.extensionsRequired;
+        }
+    }
+}