import AttributeCompression from "../Core/AttributeCompression.js";
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import Cartesian3 from "../Core/Cartesian3.js";
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import Cartographic from "../Core/Cartographic.js";
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import Ellipsoid from "../Core/Ellipsoid.js";
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import CesiumMath from "../Core/Math.js";
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import Rectangle from "../Core/Rectangle.js";
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import createTaskProcessorWorker from "./createTaskProcessorWorker.js";
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var maxShort = 32767;
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var scratchBVCartographic = new Cartographic();
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var scratchEncodedPosition = new Cartesian3();
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var scratchRectangle = new Rectangle();
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var scratchEllipsoid = new Ellipsoid();
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var scratchMinMaxHeights = {
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min: undefined,
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max: undefined,
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};
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function unpackBuffer(packedBuffer) {
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packedBuffer = new Float64Array(packedBuffer);
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var offset = 0;
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scratchMinMaxHeights.min = packedBuffer[offset++];
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scratchMinMaxHeights.max = packedBuffer[offset++];
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Rectangle.unpack(packedBuffer, offset, scratchRectangle);
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offset += Rectangle.packedLength;
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Ellipsoid.unpack(packedBuffer, offset, scratchEllipsoid);
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}
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function createVectorTilePoints(parameters, transferableObjects) {
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var positions = new Uint16Array(parameters.positions);
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unpackBuffer(parameters.packedBuffer);
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var rectangle = scratchRectangle;
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var ellipsoid = scratchEllipsoid;
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var minimumHeight = scratchMinMaxHeights.min;
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var maximumHeight = scratchMinMaxHeights.max;
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var positionsLength = positions.length / 3;
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var uBuffer = positions.subarray(0, positionsLength);
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var vBuffer = positions.subarray(positionsLength, 2 * positionsLength);
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var heightBuffer = positions.subarray(
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2 * positionsLength,
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3 * positionsLength
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);
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AttributeCompression.zigZagDeltaDecode(uBuffer, vBuffer, heightBuffer);
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var decoded = new Float64Array(positions.length);
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for (var i = 0; i < positionsLength; ++i) {
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var u = uBuffer[i];
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var v = vBuffer[i];
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var h = heightBuffer[i];
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var lon = CesiumMath.lerp(rectangle.west, rectangle.east, u / maxShort);
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var lat = CesiumMath.lerp(rectangle.south, rectangle.north, v / maxShort);
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var alt = CesiumMath.lerp(minimumHeight, maximumHeight, h / maxShort);
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var cartographic = Cartographic.fromRadians(
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lon,
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lat,
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alt,
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scratchBVCartographic
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);
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var decodedPosition = ellipsoid.cartographicToCartesian(
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cartographic,
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scratchEncodedPosition
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);
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Cartesian3.pack(decodedPosition, decoded, i * 3);
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}
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transferableObjects.push(decoded.buffer);
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return {
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positions: decoded.buffer,
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};
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}
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export default createTaskProcessorWorker(createVectorTilePoints);
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