Add existing to tracked

node_modules/@cesium/engine/Source/Scene/Model/MappedPositions.js

@@ -0,0 +1,84 @@
+import Check from "../../Core/Check.js";
+
+/**
+ * A collection of cartographic positions (and their bounding rectangle) that
+ * have been computed from cartesian positions, for a specific ellipsoid.
+ *
+ * This is used in the <code>ModelPrimitiveImagery</code> class, and stores
+ * the positions of the primitive, mapped to an ellipsoid that was used
+ * on one of the imagery layers. This avoids recomputing the transform
+ * of the primitive POSITION attribute values into ECEF, and the subsequent
+ * conversion of these positions into cartographic positions.
+ *
+ * @private
+ */
+class MappedPositions {
+  /**
+   * Creates a new instance
+   *
+   * @param {Iterable<Cartographic>} cartographicPositions The positions
+   * @param {number} numPositions The number of positions
+   * @param {Rectangle} cartographicBoundingRectangle The bounding
+   * rectangle of the positions
+   * @param {Ellipsoid} ellipsoid The ellipsoid
+   */
+  constructor(
+    cartographicPositions,
+    numPositions,
+    cartographicBoundingRectangle,
+    ellipsoid,
+  ) {
+    //>>includeStart('debug', pragmas.debug);
+    Check.defined("cartographicPositions", cartographicPositions);
+    Check.typeOf.number.greaterThanOrEquals("numPositions", numPositions, 0);
+    Check.defined(
+      "cartographicBoundingRectangle",
+      cartographicBoundingRectangle,
+    );
+    Check.defined("ellipsoid", ellipsoid);
+    //>>includeEnd('debug');
+
+    this._cartographicPositions = cartographicPositions;
+    this._numPositions = numPositions;
+    this._cartographicBoundingRectangle = cartographicBoundingRectangle;
+    this._ellipsoid = ellipsoid;
+  }
+
+  /**
+   * Returns the cartographic positions
+   *
+   * @returns {Iterable<Cartographic>} The positions
+   */
+  get cartographicPositions() {
+    return this._cartographicPositions;
+  }
+
+  /**
+   * Returns the number of positions
+   *
+   * @returns {number} The number of positions
+   */
+  get numPositions() {
+    return this._numPositions;
+  }
+
+  /**
+   * Returns the cartographic bounding rectangle
+   *
+   * @returns {Rectangle} The rectangle
+   */
+  get cartographicBoundingRectangle() {
+    return this._cartographicBoundingRectangle;
+  }
+
+  /**
+   * Returns the ellipsoid for which these positions have been created
+   *
+   * @returns {Ellipsoid} The ellipsoid
+   */
+  get ellipsoid() {
+    return this._ellipsoid;
+  }
+}
+
+export default MappedPositions;