Add existing to tracked

2026-08-11 09:53:42 -04:00
parent afe07f3055
commit ffd6e3d73c
8531 changed files with 4396230 additions and 0 deletions
@@ -0,0 +1,131 @@
+import ComponentDatatype from "../Core/ComponentDatatype.js";
+import defined from "../Core/defined.js";
+
+/**
+ * @private
+ */
+function Cesium3DTileFeatureTable(featureTableJson, featureTableBinary) {
+  this.json = featureTableJson;
+  this.buffer = featureTableBinary;
+  this._cachedTypedArrays = {};
+  this.featuresLength = 0;
+}
+
+function getTypedArrayFromBinary(
+  featureTable,
+  semantic,
+  componentType,
+  componentLength,
+  count,
+  byteOffset,
+) {
+  const cachedTypedArrays = featureTable._cachedTypedArrays;
+  let typedArray = cachedTypedArrays[semantic];
+  if (!defined(typedArray)) {
+    typedArray = ComponentDatatype.createArrayBufferView(
+      componentType,
+      featureTable.buffer.buffer,
+      featureTable.buffer.byteOffset + byteOffset,
+      count * componentLength,
+    );
+    cachedTypedArrays[semantic] = typedArray;
+  }
+  return typedArray;
+}
+
+function getTypedArrayFromArray(featureTable, semantic, componentType, array) {
+  const cachedTypedArrays = featureTable._cachedTypedArrays;
+  let typedArray = cachedTypedArrays[semantic];
+  if (!defined(typedArray)) {
+    typedArray = ComponentDatatype.createTypedArray(componentType, array);
+    cachedTypedArrays[semantic] = typedArray;
+  }
+  return typedArray;
+}
+
+Cesium3DTileFeatureTable.prototype.getGlobalProperty = function (
+  semantic,
+  componentType,
+  componentLength,
+) {
+  const jsonValue = this.json[semantic];
+  if (!defined(jsonValue)) {
+    return undefined;
+  }
+
+  if (defined(jsonValue.byteOffset)) {
+    componentType = componentType ?? ComponentDatatype.UNSIGNED_INT;
+    componentLength = componentLength ?? 1;
+    return getTypedArrayFromBinary(
+      this,
+      semantic,
+      componentType,
+      componentLength,
+      1,
+      jsonValue.byteOffset,
+    );
+  }
+
+  return jsonValue;
+};
+
+Cesium3DTileFeatureTable.prototype.hasProperty = function (semantic) {
+  return defined(this.json[semantic]);
+};
+
+Cesium3DTileFeatureTable.prototype.getPropertyArray = function (
+  semantic,
+  componentType,
+  componentLength,
+) {
+  const jsonValue = this.json[semantic];
+  if (!defined(jsonValue)) {
+    return undefined;
+  }
+
+  if (defined(jsonValue.byteOffset)) {
+    if (defined(jsonValue.componentType)) {
+      componentType = ComponentDatatype.fromName(jsonValue.componentType);
+    }
+    return getTypedArrayFromBinary(
+      this,
+      semantic,
+      componentType,
+      componentLength,
+      this.featuresLength,
+      jsonValue.byteOffset,
+    );
+  }
+
+  return getTypedArrayFromArray(this, semantic, componentType, jsonValue);
+};
+
+Cesium3DTileFeatureTable.prototype.getProperty = function (
+  semantic,
+  componentType,
+  componentLength,
+  featureId,
+  result,
+) {
+  const jsonValue = this.json[semantic];
+  if (!defined(jsonValue)) {
+    return undefined;
+  }
+
+  const typedArray = this.getPropertyArray(
+    semantic,
+    componentType,
+    componentLength,
+  );
+
+  if (componentLength === 1) {
+    return typedArray[featureId];
+  }
+
+  for (let i = 0; i < componentLength; ++i) {
+    result[i] = typedArray[componentLength * featureId + i];
+  }
+
+  return result;
+};
+export default Cesium3DTileFeatureTable;