113 lines
3.7 KiB
JavaScript
113 lines
3.7 KiB
JavaScript
/**
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* @license
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* Cesium - https://github.com/CesiumGS/cesium
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* Version 1.117
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*
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* Copyright 2011-2022 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/main/LICENSE.md for full licensing details.
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*/
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import {
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createTaskProcessorWorker_default
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} from "./chunk-IBXGK4WV.js";
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import {
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AttributeCompression_default
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} from "./chunk-PS6AEMBR.js";
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import {
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Rectangle_default
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} from "./chunk-I5TDPPC4.js";
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import "./chunk-TMMOULW3.js";
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import {
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Cartesian3_default,
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Cartographic_default,
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Ellipsoid_default
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} from "./chunk-C5CE4OG6.js";
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import {
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Math_default
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} from "./chunk-4PHPQRSH.js";
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import "./chunk-PEABJLCK.js";
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import "./chunk-WFICTTOE.js";
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import "./chunk-UCPPWV64.js";
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import "./chunk-U4IMCOF5.js";
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import "./chunk-BDUJXBVF.js";
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// packages/engine/Source/Workers/createVectorTilePoints.js
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var maxShort = 32767;
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var scratchBVCartographic = new Cartographic_default();
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var scratchEncodedPosition = new Cartesian3_default();
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var scratchRectangle = new Rectangle_default();
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var scratchEllipsoid = new Ellipsoid_default();
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var scratchMinMaxHeights = {
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min: void 0,
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max: void 0
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};
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function unpackBuffer(packedBuffer) {
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packedBuffer = new Float64Array(packedBuffer);
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let offset = 0;
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scratchMinMaxHeights.min = packedBuffer[offset++];
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scratchMinMaxHeights.max = packedBuffer[offset++];
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Rectangle_default.unpack(packedBuffer, offset, scratchRectangle);
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offset += Rectangle_default.packedLength;
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Ellipsoid_default.unpack(packedBuffer, offset, scratchEllipsoid);
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}
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function createVectorTilePoints(parameters, transferableObjects) {
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const positions = new Uint16Array(parameters.positions);
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unpackBuffer(parameters.packedBuffer);
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const rectangle = scratchRectangle;
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const ellipsoid = scratchEllipsoid;
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const minimumHeight = scratchMinMaxHeights.min;
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const maximumHeight = scratchMinMaxHeights.max;
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const positionsLength = positions.length / 3;
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const uBuffer = positions.subarray(0, positionsLength);
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const vBuffer = positions.subarray(positionsLength, 2 * positionsLength);
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const heightBuffer = positions.subarray(
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2 * positionsLength,
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3 * positionsLength
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);
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AttributeCompression_default.zigZagDeltaDecode(uBuffer, vBuffer, heightBuffer);
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const decoded = new Float64Array(positions.length);
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for (let i = 0; i < positionsLength; ++i) {
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const u = uBuffer[i];
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const v = vBuffer[i];
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const h = heightBuffer[i];
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const lon = Math_default.lerp(rectangle.west, rectangle.east, u / maxShort);
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const lat = Math_default.lerp(rectangle.south, rectangle.north, v / maxShort);
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const alt = Math_default.lerp(minimumHeight, maximumHeight, h / maxShort);
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const cartographic = Cartographic_default.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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const decodedPosition = ellipsoid.cartographicToCartesian(
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cartographic,
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scratchEncodedPosition
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);
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Cartesian3_default.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_default = createTaskProcessorWorker_default(createVectorTilePoints);
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export {
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createVectorTilePoints_default as default
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};
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