261 lines
8.9 KiB
JavaScript
261 lines
8.9 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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IndexDatatype_default
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} from "./chunk-WWP3I7R5.js";
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import {
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Rectangle_default,
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combine_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/Core/decodeVectorPolylinePositions.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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function decodeVectorPolylinePositions(positions, rectangle, minimumHeight, maximumHeight, ellipsoid) {
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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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return decoded;
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}
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var decodeVectorPolylinePositions_default = decodeVectorPolylinePositions;
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// packages/engine/Source/Workers/createVectorTilePolylines.js
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var scratchRectangle = new Rectangle_default();
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var scratchEllipsoid = new Ellipsoid_default();
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var scratchCenter = new Cartesian3_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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offset += Ellipsoid_default.packedLength;
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Cartesian3_default.unpack(packedBuffer, offset, scratchCenter);
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}
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function getPositionOffsets(counts) {
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const countsLength = counts.length;
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const positionOffsets = new Uint32Array(countsLength + 1);
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let offset = 0;
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for (let i = 0; i < countsLength; ++i) {
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positionOffsets[i] = offset;
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offset += counts[i];
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}
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positionOffsets[countsLength] = offset;
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return positionOffsets;
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}
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var scratchP0 = new Cartesian3_default();
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var scratchP1 = new Cartesian3_default();
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var scratchPrev = new Cartesian3_default();
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var scratchCur = new Cartesian3_default();
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var scratchNext = new Cartesian3_default();
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function createVectorTilePolylines(parameters, transferableObjects) {
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const encodedPositions = new Uint16Array(parameters.positions);
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const widths = new Uint16Array(parameters.widths);
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const counts = new Uint32Array(parameters.counts);
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const batchIds = new Uint16Array(parameters.batchIds);
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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 center = scratchCenter;
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const minimumHeight = scratchMinMaxHeights.min;
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const maximumHeight = scratchMinMaxHeights.max;
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const positions = decodeVectorPolylinePositions_default(
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encodedPositions,
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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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const positionsLength = positions.length / 3;
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const size = positionsLength * 4 - 4;
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const curPositions = new Float32Array(size * 3);
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const prevPositions = new Float32Array(size * 3);
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const nextPositions = new Float32Array(size * 3);
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const expandAndWidth = new Float32Array(size * 2);
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const vertexBatchIds = new Uint16Array(size);
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let positionIndex = 0;
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let expandAndWidthIndex = 0;
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let batchIdIndex = 0;
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let i;
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let offset = 0;
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let length = counts.length;
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for (i = 0; i < length; ++i) {
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const count = counts[i];
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const width = widths[i];
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const batchId = batchIds[i];
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for (let j = 0; j < count; ++j) {
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let previous;
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if (j === 0) {
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const p0 = Cartesian3_default.unpack(positions, offset * 3, scratchP0);
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const p1 = Cartesian3_default.unpack(positions, (offset + 1) * 3, scratchP1);
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previous = Cartesian3_default.subtract(p0, p1, scratchPrev);
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Cartesian3_default.add(p0, previous, previous);
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} else {
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previous = Cartesian3_default.unpack(
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positions,
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(offset + j - 1) * 3,
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scratchPrev
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);
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}
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const current = Cartesian3_default.unpack(
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positions,
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(offset + j) * 3,
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scratchCur
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);
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let next;
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if (j === count - 1) {
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const p2 = Cartesian3_default.unpack(
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positions,
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(offset + count - 1) * 3,
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scratchP0
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);
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const p3 = Cartesian3_default.unpack(
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positions,
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(offset + count - 2) * 3,
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scratchP1
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);
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next = Cartesian3_default.subtract(p2, p3, scratchNext);
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Cartesian3_default.add(p2, next, next);
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} else {
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next = Cartesian3_default.unpack(positions, (offset + j + 1) * 3, scratchNext);
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}
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Cartesian3_default.subtract(previous, center, previous);
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Cartesian3_default.subtract(current, center, current);
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Cartesian3_default.subtract(next, center, next);
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const startK = j === 0 ? 2 : 0;
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const endK = j === count - 1 ? 2 : 4;
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for (let k = startK; k < endK; ++k) {
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Cartesian3_default.pack(current, curPositions, positionIndex);
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Cartesian3_default.pack(previous, prevPositions, positionIndex);
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Cartesian3_default.pack(next, nextPositions, positionIndex);
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positionIndex += 3;
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const direction = k - 2 < 0 ? -1 : 1;
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expandAndWidth[expandAndWidthIndex++] = 2 * (k % 2) - 1;
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expandAndWidth[expandAndWidthIndex++] = direction * width;
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vertexBatchIds[batchIdIndex++] = batchId;
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}
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}
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offset += count;
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}
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const indices = IndexDatatype_default.createTypedArray(size, positionsLength * 6 - 6);
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let index = 0;
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let indicesIndex = 0;
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length = positionsLength - 1;
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for (i = 0; i < length; ++i) {
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indices[indicesIndex++] = index;
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indices[indicesIndex++] = index + 2;
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indices[indicesIndex++] = index + 1;
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indices[indicesIndex++] = index + 1;
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indices[indicesIndex++] = index + 2;
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indices[indicesIndex++] = index + 3;
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index += 4;
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}
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transferableObjects.push(
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curPositions.buffer,
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prevPositions.buffer,
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nextPositions.buffer
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);
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transferableObjects.push(
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expandAndWidth.buffer,
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vertexBatchIds.buffer,
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indices.buffer
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);
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let results = {
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indexDatatype: indices.BYTES_PER_ELEMENT === 2 ? IndexDatatype_default.UNSIGNED_SHORT : IndexDatatype_default.UNSIGNED_INT,
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currentPositions: curPositions.buffer,
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previousPositions: prevPositions.buffer,
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nextPositions: nextPositions.buffer,
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expandAndWidth: expandAndWidth.buffer,
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batchIds: vertexBatchIds.buffer,
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indices: indices.buffer
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};
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if (parameters.keepDecodedPositions) {
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const positionOffsets = getPositionOffsets(counts);
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transferableObjects.push(positions.buffer, positionOffsets.buffer);
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results = combine_default(results, {
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decodedPositions: positions.buffer,
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decodedPositionOffsets: positionOffsets.buffer
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});
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}
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return results;
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}
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var createVectorTilePolylines_default = createTaskProcessorWorker_default(createVectorTilePolylines);
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export {
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createVectorTilePolylines_default as default
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};
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