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 Color from "../Core/Color.js";
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import defined from "../Core/defined.js";
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import Ellipsoid from "../Core/Ellipsoid.js";
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import IndexDatatype from "../Core/IndexDatatype.js";
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import CesiumMath from "../Core/Math.js";
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import OrientedBoundingBox from "../Core/OrientedBoundingBox.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 scratchCenter = new Cartesian3();
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var scratchEllipsoid = new Ellipsoid();
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var scratchRectangle = new Rectangle();
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var scratchScalars = {
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min: undefined,
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max: undefined,
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indexBytesPerElement: undefined,
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};
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function unpackBuffer(buffer) {
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var packedBuffer = new Float64Array(buffer);
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var offset = 0;
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scratchScalars.indexBytesPerElement = packedBuffer[offset++];
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scratchScalars.min = packedBuffer[offset++];
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scratchScalars.max = packedBuffer[offset++];
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Cartesian3.unpack(packedBuffer, offset, scratchCenter);
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offset += Cartesian3.packedLength;
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Ellipsoid.unpack(packedBuffer, offset, scratchEllipsoid);
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offset += Ellipsoid.packedLength;
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Rectangle.unpack(packedBuffer, offset, scratchRectangle);
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}
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function packedBatchedIndicesLength(batchedIndices) {
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var length = batchedIndices.length;
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var count = 0;
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for (var i = 0; i < length; ++i) {
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count += Color.packedLength + 3 + batchedIndices[i].batchIds.length;
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}
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return count;
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}
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function packBuffer(indexDatatype, boundingVolumes, batchedIndices) {
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var numBVs = boundingVolumes.length;
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var length =
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1 +
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1 +
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numBVs * OrientedBoundingBox.packedLength +
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1 +
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packedBatchedIndicesLength(batchedIndices);
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var packedBuffer = new Float64Array(length);
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var offset = 0;
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packedBuffer[offset++] = indexDatatype;
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packedBuffer[offset++] = numBVs;
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for (var i = 0; i < numBVs; ++i) {
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OrientedBoundingBox.pack(boundingVolumes[i], packedBuffer, offset);
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offset += OrientedBoundingBox.packedLength;
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}
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var indicesLength = batchedIndices.length;
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packedBuffer[offset++] = indicesLength;
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for (var j = 0; j < indicesLength; ++j) {
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var batchedIndex = batchedIndices[j];
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Color.pack(batchedIndex.color, packedBuffer, offset);
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offset += Color.packedLength;
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packedBuffer[offset++] = batchedIndex.offset;
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packedBuffer[offset++] = batchedIndex.count;
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var batchIds = batchedIndex.batchIds;
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var batchIdsLength = batchIds.length;
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packedBuffer[offset++] = batchIdsLength;
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for (var k = 0; k < batchIdsLength; ++k) {
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packedBuffer[offset++] = batchIds[k];
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}
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}
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return packedBuffer;
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}
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var maxShort = 32767;
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var scratchEncodedPosition = new Cartesian3();
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var scratchNormal = new Cartesian3();
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var scratchScaledNormal = new Cartesian3();
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var scratchMinHeightPosition = new Cartesian3();
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var scratchMaxHeightPosition = new Cartesian3();
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var scratchBVCartographic = new Cartographic();
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var scratchBVRectangle = new Rectangle();
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function createVectorTilePolygons(parameters, transferableObjects) {
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unpackBuffer(parameters.packedBuffer);
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var indices;
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var indexBytesPerElement = scratchScalars.indexBytesPerElement;
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if (indexBytesPerElement === 2) {
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indices = new Uint16Array(parameters.indices);
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} else {
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indices = new Uint32Array(parameters.indices);
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}
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var positions = new Uint16Array(parameters.positions);
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var counts = new Uint32Array(parameters.counts);
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var indexCounts = new Uint32Array(parameters.indexCounts);
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var batchIds = new Uint32Array(parameters.batchIds);
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var batchTableColors = new Uint32Array(parameters.batchTableColors);
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var boundingVolumes = new Array(counts.length);
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var center = scratchCenter;
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var ellipsoid = scratchEllipsoid;
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var rectangle = scratchRectangle;
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var minHeight = scratchScalars.min;
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var maxHeight = scratchScalars.max;
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var minimumHeights = parameters.minimumHeights;
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var maximumHeights = parameters.maximumHeights;
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if (defined(minimumHeights) && defined(maximumHeights)) {
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minimumHeights = new Float32Array(minimumHeights);
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maximumHeights = new Float32Array(maximumHeights);
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}
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var i;
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var j;
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var rgba;
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var positionsLength = positions.length / 2;
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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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AttributeCompression.zigZagDeltaDecode(uBuffer, vBuffer);
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var decodedPositions = new Float64Array(positionsLength * 3);
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for (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 x = CesiumMath.lerp(rectangle.west, rectangle.east, u / maxShort);
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var y = CesiumMath.lerp(rectangle.south, rectangle.north, v / maxShort);
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var cart = Cartographic.fromRadians(x, y, 0.0, scratchBVCartographic);
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var decodedPosition = ellipsoid.cartographicToCartesian(
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cart,
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scratchEncodedPosition
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);
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Cartesian3.pack(decodedPosition, decodedPositions, i * 3);
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}
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var countsLength = counts.length;
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var offsets = new Array(countsLength);
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var indexOffsets = new Array(countsLength);
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var currentOffset = 0;
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var currentIndexOffset = 0;
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for (i = 0; i < countsLength; ++i) {
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offsets[i] = currentOffset;
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indexOffsets[i] = currentIndexOffset;
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currentOffset += counts[i];
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currentIndexOffset += indexCounts[i];
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}
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var batchedPositions = new Float32Array(positionsLength * 3 * 2);
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var batchedIds = new Uint16Array(positionsLength * 2);
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var batchedIndexOffsets = new Uint32Array(indexOffsets.length);
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var batchedIndexCounts = new Uint32Array(indexCounts.length);
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var batchedIndices = [];
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var colorToBuffers = {};
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for (i = 0; i < countsLength; ++i) {
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rgba = batchTableColors[i];
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if (!defined(colorToBuffers[rgba])) {
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colorToBuffers[rgba] = {
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positionLength: counts[i],
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indexLength: indexCounts[i],
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offset: 0,
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indexOffset: 0,
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batchIds: [i],
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};
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} else {
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colorToBuffers[rgba].positionLength += counts[i];
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colorToBuffers[rgba].indexLength += indexCounts[i];
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colorToBuffers[rgba].batchIds.push(i);
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}
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}
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// get the offsets and counts for the positions and indices of each primitive
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var buffer;
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var byColorPositionOffset = 0;
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var byColorIndexOffset = 0;
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for (rgba in colorToBuffers) {
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if (colorToBuffers.hasOwnProperty(rgba)) {
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buffer = colorToBuffers[rgba];
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buffer.offset = byColorPositionOffset;
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buffer.indexOffset = byColorIndexOffset;
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var positionLength = buffer.positionLength * 2;
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var indexLength = buffer.indexLength * 2 + buffer.positionLength * 6;
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byColorPositionOffset += positionLength;
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byColorIndexOffset += indexLength;
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buffer.indexLength = indexLength;
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}
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}
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var batchedDrawCalls = [];
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for (rgba in colorToBuffers) {
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if (colorToBuffers.hasOwnProperty(rgba)) {
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buffer = colorToBuffers[rgba];
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batchedDrawCalls.push({
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color: Color.fromRgba(parseInt(rgba)),
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offset: buffer.indexOffset,
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count: buffer.indexLength,
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batchIds: buffer.batchIds,
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});
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}
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}
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for (i = 0; i < countsLength; ++i) {
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rgba = batchTableColors[i];
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buffer = colorToBuffers[rgba];
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var positionOffset = buffer.offset;
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var positionIndex = positionOffset * 3;
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var batchIdIndex = positionOffset;
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var polygonOffset = offsets[i];
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var polygonCount = counts[i];
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var batchId = batchIds[i];
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var polygonMinimumHeight = minHeight;
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var polygonMaximumHeight = maxHeight;
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if (defined(minimumHeights) && defined(maximumHeights)) {
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polygonMinimumHeight = minimumHeights[i];
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polygonMaximumHeight = maximumHeights[i];
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}
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var minLat = Number.POSITIVE_INFINITY;
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var maxLat = Number.NEGATIVE_INFINITY;
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var minLon = Number.POSITIVE_INFINITY;
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var maxLon = Number.NEGATIVE_INFINITY;
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for (j = 0; j < polygonCount; ++j) {
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var position = Cartesian3.unpack(
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decodedPositions,
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polygonOffset * 3 + j * 3,
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scratchEncodedPosition
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);
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ellipsoid.scaleToGeodeticSurface(position, position);
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var carto = ellipsoid.cartesianToCartographic(
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position,
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scratchBVCartographic
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);
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var lat = carto.latitude;
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var lon = carto.longitude;
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minLat = Math.min(lat, minLat);
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maxLat = Math.max(lat, maxLat);
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minLon = Math.min(lon, minLon);
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maxLon = Math.max(lon, maxLon);
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var normal = ellipsoid.geodeticSurfaceNormal(position, scratchNormal);
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var scaledNormal = Cartesian3.multiplyByScalar(
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normal,
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polygonMinimumHeight,
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scratchScaledNormal
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);
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var minHeightPosition = Cartesian3.add(
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position,
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scaledNormal,
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scratchMinHeightPosition
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);
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scaledNormal = Cartesian3.multiplyByScalar(
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normal,
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polygonMaximumHeight,
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scaledNormal
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);
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var maxHeightPosition = Cartesian3.add(
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position,
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scaledNormal,
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scratchMaxHeightPosition
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);
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Cartesian3.subtract(maxHeightPosition, center, maxHeightPosition);
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Cartesian3.subtract(minHeightPosition, center, minHeightPosition);
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Cartesian3.pack(maxHeightPosition, batchedPositions, positionIndex);
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Cartesian3.pack(minHeightPosition, batchedPositions, positionIndex + 3);
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batchedIds[batchIdIndex] = batchId;
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batchedIds[batchIdIndex + 1] = batchId;
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positionIndex += 6;
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batchIdIndex += 2;
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}
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rectangle = scratchBVRectangle;
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rectangle.west = minLon;
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rectangle.east = maxLon;
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rectangle.south = minLat;
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rectangle.north = maxLat;
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boundingVolumes[i] = OrientedBoundingBox.fromRectangle(
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rectangle,
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minHeight,
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maxHeight,
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ellipsoid
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);
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var indicesIndex = buffer.indexOffset;
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var indexOffset = indexOffsets[i];
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var indexCount = indexCounts[i];
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batchedIndexOffsets[i] = indicesIndex;
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for (j = 0; j < indexCount; j += 3) {
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var i0 = indices[indexOffset + j] - polygonOffset;
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var i1 = indices[indexOffset + j + 1] - polygonOffset;
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var i2 = indices[indexOffset + j + 2] - polygonOffset;
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// triangle on the top of the extruded polygon
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batchedIndices[indicesIndex++] = i0 * 2 + positionOffset;
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batchedIndices[indicesIndex++] = i1 * 2 + positionOffset;
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batchedIndices[indicesIndex++] = i2 * 2 + positionOffset;
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// triangle on the bottom of the extruded polygon
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batchedIndices[indicesIndex++] = i2 * 2 + 1 + positionOffset;
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batchedIndices[indicesIndex++] = i1 * 2 + 1 + positionOffset;
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batchedIndices[indicesIndex++] = i0 * 2 + 1 + positionOffset;
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}
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// indices for the walls of the extruded polygon
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for (j = 0; j < polygonCount; ++j) {
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var v0 = j;
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var v1 = (j + 1) % polygonCount;
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batchedIndices[indicesIndex++] = v0 * 2 + 1 + positionOffset;
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batchedIndices[indicesIndex++] = v1 * 2 + positionOffset;
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batchedIndices[indicesIndex++] = v0 * 2 + positionOffset;
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batchedIndices[indicesIndex++] = v0 * 2 + 1 + positionOffset;
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batchedIndices[indicesIndex++] = v1 * 2 + 1 + positionOffset;
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batchedIndices[indicesIndex++] = v1 * 2 + positionOffset;
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}
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buffer.offset += polygonCount * 2;
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buffer.indexOffset = indicesIndex;
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batchedIndexCounts[i] = indicesIndex - batchedIndexOffsets[i];
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}
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batchedIndices = IndexDatatype.createTypedArray(
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batchedPositions.length / 3,
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batchedIndices
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);
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var batchedIndicesLength = batchedDrawCalls.length;
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for (var m = 0; m < batchedIndicesLength; ++m) {
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var tempIds = batchedDrawCalls[m].batchIds;
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var count = 0;
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var tempIdsLength = tempIds.length;
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for (var n = 0; n < tempIdsLength; ++n) {
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count += batchedIndexCounts[tempIds[n]];
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}
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batchedDrawCalls[m].count = count;
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}
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var indexDatatype =
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batchedIndices.BYTES_PER_ELEMENT === 2
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? IndexDatatype.UNSIGNED_SHORT
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: IndexDatatype.UNSIGNED_INT;
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var packedBuffer = packBuffer(
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indexDatatype,
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boundingVolumes,
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batchedDrawCalls
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);
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transferableObjects.push(
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batchedPositions.buffer,
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batchedIndices.buffer,
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batchedIndexOffsets.buffer,
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batchedIndexCounts.buffer,
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batchedIds.buffer,
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packedBuffer.buffer
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);
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return {
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positions: batchedPositions.buffer,
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indices: batchedIndices.buffer,
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indexOffsets: batchedIndexOffsets.buffer,
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indexCounts: batchedIndexCounts.buffer,
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batchIds: batchedIds.buffer,
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packedBuffer: packedBuffer.buffer,
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};
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}
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export default createTaskProcessorWorker(createVectorTilePolygons);
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