Add existing to tracked

node_modules/@cesium/engine/Source/Scene/getBinaryAccessor.js

@@ -0,0 +1,56 @@
+import Cartesian2 from "../Core/Cartesian2.js";
+import Cartesian3 from "../Core/Cartesian3.js";
+import Cartesian4 from "../Core/Cartesian4.js";
+import ComponentDatatype from "../Core/ComponentDatatype.js";
+import Matrix2 from "../Core/Matrix2.js";
+import Matrix3 from "../Core/Matrix3.js";
+import Matrix4 from "../Core/Matrix4.js";
+
+const ComponentsPerAttribute = {
+  SCALAR: 1,
+  VEC2: 2,
+  VEC3: 3,
+  VEC4: 4,
+  MAT2: 4,
+  MAT3: 9,
+  MAT4: 16,
+};
+
+const ClassPerType = {
+  SCALAR: undefined,
+  VEC2: Cartesian2,
+  VEC3: Cartesian3,
+  VEC4: Cartesian4,
+  MAT2: Matrix2,
+  MAT3: Matrix3,
+  MAT4: Matrix4,
+};
+
+/**
+ * @private
+ */
+function getBinaryAccessor(accessor) {
+  const componentType = accessor.componentType;
+  let componentDatatype;
+  if (typeof componentType === "string") {
+    componentDatatype = ComponentDatatype.fromName(componentType);
+  } else {
+    componentDatatype = componentType;
+  }
+
+  const componentsPerAttribute = ComponentsPerAttribute[accessor.type];
+  const classType = ClassPerType[accessor.type];
+  return {
+    componentsPerAttribute: componentsPerAttribute,
+    classType: classType,
+    createArrayBufferView: function (buffer, byteOffset, length) {
+      return ComponentDatatype.createArrayBufferView(
+        componentDatatype,
+        buffer,
+        byteOffset,
+        componentsPerAttribute * length,
+      );
+    },
+  };
+}
+export default getBinaryAccessor;