93 lines
3.8 KiB
JavaScript
93 lines
3.8 KiB
JavaScript
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/**
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* Cesium - https://github.com/CesiumGS/cesium
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*
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* Copyright 2011-2020 Cesium Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Columbus View (Pat. Pend.)
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*
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* Portions licensed separately.
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* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
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*/
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define(['./when-c2e8ef35', './Check-c4f3a3fc', './Math-a06249ed', './Cartesian2-a4e73c05', './AttributeCompression-6b12d004', './createTaskProcessorWorker'], function (when, Check, _Math, Cartesian2, AttributeCompression, createTaskProcessorWorker) { 'use strict';
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var maxShort = 32767;
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var scratchBVCartographic = new Cartesian2.Cartographic();
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var scratchEncodedPosition = new Cartesian2.Cartesian3();
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var scratchRectangle = new Cartesian2.Rectangle();
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var scratchEllipsoid = new Cartesian2.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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Cartesian2.Rectangle.unpack(packedBuffer, offset, scratchRectangle);
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offset += Cartesian2.Rectangle.packedLength;
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Cartesian2.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(2 * positionsLength, 3 * positionsLength);
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AttributeCompression.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 = _Math.CesiumMath.lerp(rectangle.west, rectangle.east, u / maxShort);
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var lat = _Math.CesiumMath.lerp(rectangle.south, rectangle.north, v / maxShort);
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var alt = _Math.CesiumMath.lerp(minimumHeight, maximumHeight, h / maxShort);
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var cartographic = Cartesian2.Cartographic.fromRadians(lon, lat, alt, scratchBVCartographic);
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var decodedPosition = ellipsoid.cartographicToCartesian(cartographic, scratchEncodedPosition);
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Cartesian2.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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var createVectorTilePoints$1 = createTaskProcessorWorker(createVectorTilePoints);
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return createVectorTilePoints$1;
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});
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//# sourceMappingURL=createVectorTilePoints.js.map
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