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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;
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