import AttributeCompression from "./AttributeCompression.js";
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import Cartesian3 from "./Cartesian3.js";
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import Cartographic from "./Cartographic.js";
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import CesiumMath from "./Math.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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function decodeVectorPolylinePositions(
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positions,
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rectangle,
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minimumHeight,
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maximumHeight,
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ellipsoid
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) {
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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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return decoded;
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}
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export default decodeVectorPolylinePositions;
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