Add existing to tracked

node_modules/@cesium/engine/Source/Scene/GltfPipeline/getComponentReader.js

@@ -0,0 +1,147 @@
+import ComponentDatatype from "../../Core/ComponentDatatype.js";
+
+/**
+ * Returns a function to read and convert data from a DataView into an array.
+ *
+ * @param {number} componentType Type to convert the data to.
+ * @returns {ComponentReader} Function that reads and converts data.
+ *
+ * @private
+ */
+function getComponentReader(componentType) {
+  switch (componentType) {
+    case ComponentDatatype.BYTE:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getInt8(
+            byteOffset + i * componentTypeByteLength,
+          );
+        }
+      };
+    case ComponentDatatype.UNSIGNED_BYTE:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getUint8(
+            byteOffset + i * componentTypeByteLength,
+          );
+        }
+      };
+    case ComponentDatatype.SHORT:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getInt16(
+            byteOffset + i * componentTypeByteLength,
+            true,
+          );
+        }
+      };
+    case ComponentDatatype.UNSIGNED_SHORT:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getUint16(
+            byteOffset + i * componentTypeByteLength,
+            true,
+          );
+        }
+      };
+    case ComponentDatatype.INT:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getInt32(
+            byteOffset + i * componentTypeByteLength,
+            true,
+          );
+        }
+      };
+    case ComponentDatatype.UNSIGNED_INT:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getUint32(
+            byteOffset + i * componentTypeByteLength,
+            true,
+          );
+        }
+      };
+    case ComponentDatatype.FLOAT:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getFloat32(
+            byteOffset + i * componentTypeByteLength,
+            true,
+          );
+        }
+      };
+    case ComponentDatatype.DOUBLE:
+      return function (
+        dataView,
+        byteOffset,
+        numberOfComponents,
+        componentTypeByteLength,
+        result,
+      ) {
+        for (let i = 0; i < numberOfComponents; ++i) {
+          result[i] = dataView.getFloat64(
+            byteOffset + i * componentTypeByteLength,
+            true,
+          );
+        }
+      };
+  }
+}
+
+/**
+ * A callback function that logs messages.
+ * @callback ComponentReader
+ *
+ * @param {DataView} dataView The data view to read from.
+ * @param {number} byteOffset The byte offset applied when reading from the data view.
+ * @param {number} numberOfComponents The number of components to read.
+ * @param {number} componentTypeByteLength The byte length of each component.
+ * @param {number} result An array storing the components that are read.
+ *
+ * @private
+ */
+
+export default getComponentReader;