- /**
- * Cesium - https://github.com/CesiumGS/cesium
- *
- * Copyright 2011-2020 Cesium Contributors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * Columbus View (Pat. Pend.)
- *
- * Portions licensed separately.
- * See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
- */
- define(['./when-8d13db60', './Check-70bec281', './Math-61ede240', './Cartographic-f2a06374', './Cartesian2-16a61632', './WebGLConstants-4c11ee5f', './AttributeCompression-c177f997', './IndexDatatype-9435b55f', './createTaskProcessorWorker'], function (when, Check, _Math, Cartographic, Cartesian2, WebGLConstants, AttributeCompression, IndexDatatype, createTaskProcessorWorker) { 'use strict';
-
- var maxShort = 32767;
-
- var scratchBVCartographic = new Cartographic.Cartographic();
- var scratchEncodedPosition = new Cartographic.Cartesian3();
-
- function decodePositions(positions, rectangle, minimumHeight, maximumHeight, ellipsoid) {
- var positionsLength = positions.length / 3;
- var uBuffer = positions.subarray(0, positionsLength);
- var vBuffer = positions.subarray(positionsLength, 2 * positionsLength);
- var heightBuffer = positions.subarray(2 * positionsLength, 3 * positionsLength);
- AttributeCompression.AttributeCompression.zigZagDeltaDecode(uBuffer, vBuffer, heightBuffer);
-
- var decoded = new Float32Array(positions.length);
- for (var i = 0; i < positionsLength; ++i) {
- var u = uBuffer[i];
- var v = vBuffer[i];
- var h = heightBuffer[i];
-
- var lon = _Math.CesiumMath.lerp(rectangle.west, rectangle.east, u / maxShort);
- var lat = _Math.CesiumMath.lerp(rectangle.south, rectangle.north, v / maxShort);
- var alt = _Math.CesiumMath.lerp(minimumHeight, maximumHeight, h / maxShort);
-
- var cartographic = Cartographic.Cartographic.fromRadians(lon, lat, alt, scratchBVCartographic);
- var decodedPosition = ellipsoid.cartographicToCartesian(cartographic, scratchEncodedPosition);
- Cartographic.Cartesian3.pack(decodedPosition, decoded, i * 3);
- }
- return decoded;
- }
-
- var scratchRectangle = new Cartesian2.Rectangle();
- var scratchEllipsoid = new Cartesian2.Ellipsoid();
- var scratchCenter = new Cartographic.Cartesian3();
- var scratchMinMaxHeights = {
- min : undefined,
- max : undefined
- };
-
- function unpackBuffer(packedBuffer) {
- packedBuffer = new Float64Array(packedBuffer);
-
- var offset = 0;
- scratchMinMaxHeights.min = packedBuffer[offset++];
- scratchMinMaxHeights.max = packedBuffer[offset++];
-
- Cartesian2.Rectangle.unpack(packedBuffer, offset, scratchRectangle);
- offset += Cartesian2.Rectangle.packedLength;
-
- Cartesian2.Ellipsoid.unpack(packedBuffer, offset, scratchEllipsoid);
- offset += Cartesian2.Ellipsoid.packedLength;
-
- Cartographic.Cartesian3.unpack(packedBuffer, offset, scratchCenter);
- }
-
- var scratchP0 = new Cartographic.Cartesian3();
- var scratchP1 = new Cartographic.Cartesian3();
- var scratchPrev = new Cartographic.Cartesian3();
- var scratchCur = new Cartographic.Cartesian3();
- var scratchNext = new Cartographic.Cartesian3();
-
- function createVectorTilePolylines(parameters, transferableObjects) {
- var encodedPositions = new Uint16Array(parameters.positions);
- var widths = new Uint16Array(parameters.widths);
- var counts = new Uint32Array(parameters.counts);
- var batchIds = new Uint16Array(parameters.batchIds);
-
- unpackBuffer(parameters.packedBuffer);
- var rectangle = scratchRectangle;
- var ellipsoid = scratchEllipsoid;
- var center = scratchCenter;
- var minimumHeight = scratchMinMaxHeights.min;
- var maximumHeight = scratchMinMaxHeights.max;
-
- var positions = decodePositions(encodedPositions, rectangle, minimumHeight, maximumHeight, ellipsoid);
-
- var positionsLength = positions.length / 3;
- var size = positionsLength * 4 - 4;
-
- var curPositions = new Float32Array(size * 3);
- var prevPositions = new Float32Array(size * 3);
- var nextPositions = new Float32Array(size * 3);
- var expandAndWidth = new Float32Array(size * 2);
- var vertexBatchIds = new Uint16Array(size);
-
- var positionIndex = 0;
- var expandAndWidthIndex = 0;
- var batchIdIndex = 0;
-
- var i;
- var offset = 0;
- var length = counts.length;
-
- for (i = 0; i < length; ++i) {
- var count = counts [i];
- var width = widths[i];
- var batchId = batchIds[i];
-
- for (var j = 0; j < count; ++j) {
- var previous;
- if (j === 0) {
- var p0 = Cartographic.Cartesian3.unpack(positions, offset * 3, scratchP0);
- var p1 = Cartographic.Cartesian3.unpack(positions, (offset + 1) * 3, scratchP1);
-
- previous = Cartographic.Cartesian3.subtract(p0, p1, scratchPrev);
- Cartographic.Cartesian3.add(p0, previous, previous);
- } else {
- previous = Cartographic.Cartesian3.unpack(positions, (offset + j - 1) * 3, scratchPrev);
- }
-
- var current = Cartographic.Cartesian3.unpack(positions, (offset + j) * 3, scratchCur);
-
- var next;
- if (j === count - 1) {
- var p2 = Cartographic.Cartesian3.unpack(positions, (offset + count - 1) * 3, scratchP0);
- var p3 = Cartographic.Cartesian3.unpack(positions, (offset + count - 2) * 3, scratchP1);
-
- next = Cartographic.Cartesian3.subtract(p2, p3, scratchNext);
- Cartographic.Cartesian3.add(p2, next, next);
- } else {
- next = Cartographic.Cartesian3.unpack(positions, (offset + j + 1) * 3, scratchNext);
- }
-
- Cartographic.Cartesian3.subtract(previous, center, previous);
- Cartographic.Cartesian3.subtract(current, center, current);
- Cartographic.Cartesian3.subtract(next, center, next);
-
- var startK = j === 0 ? 2 : 0;
- var endK = j === count - 1 ? 2 : 4;
-
- for (var k = startK; k < endK; ++k) {
- Cartographic.Cartesian3.pack(current, curPositions, positionIndex);
- Cartographic.Cartesian3.pack(previous, prevPositions, positionIndex);
- Cartographic.Cartesian3.pack(next, nextPositions, positionIndex);
- positionIndex += 3;
-
- var direction = (k - 2 < 0) ? -1.0 : 1.0;
- expandAndWidth[expandAndWidthIndex++] = 2 * (k % 2) - 1;
- expandAndWidth[expandAndWidthIndex++] = direction * width;
-
- vertexBatchIds[batchIdIndex++] = batchId;
- }
- }
-
- offset += count;
- }
-
- var indices = IndexDatatype.IndexDatatype.createTypedArray(size, positionsLength * 6 - 6);
- var index = 0;
- var indicesIndex = 0;
- length = positionsLength - 1;
- for (i = 0; i < length; ++i) {
- indices[indicesIndex++] = index;
- indices[indicesIndex++] = index + 2;
- indices[indicesIndex++] = index + 1;
-
- indices[indicesIndex++] = index + 1;
- indices[indicesIndex++] = index + 2;
- indices[indicesIndex++] = index + 3;
-
- index += 4;
- }
-
- transferableObjects.push(curPositions.buffer, prevPositions.buffer, nextPositions.buffer);
- transferableObjects.push(expandAndWidth.buffer, vertexBatchIds.buffer, indices.buffer);
-
- return {
- indexDatatype : (indices.BYTES_PER_ELEMENT === 2) ? IndexDatatype.IndexDatatype.UNSIGNED_SHORT : IndexDatatype.IndexDatatype.UNSIGNED_INT,
- currentPositions : curPositions.buffer,
- previousPositions : prevPositions.buffer,
- nextPositions : nextPositions.buffer,
- expandAndWidth : expandAndWidth.buffer,
- batchIds : vertexBatchIds.buffer,
- indices : indices.buffer
- };
- }
- var createVectorTilePolylines$1 = createTaskProcessorWorker(createVectorTilePolylines);
-
- return createVectorTilePolylines$1;
-
- });