737 lines
36 KiB
JavaScript
737 lines
36 KiB
JavaScript
/**
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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', './Transforms-533d1994', './RuntimeError-6122571f', './WebGLConstants-4ae0db90', './ComponentDatatype-762ab5b7', './AttributeCompression-6b12d004', './IndexDatatype-755cb3fd', './IntersectionTests-11682642', './Plane-beebe18b', './WebMercatorProjection-ed47c368', './createTaskProcessorWorker', './EllipsoidTangentPlane-cf837d4c', './OrientedBoundingBox-85824f79', './TerrainEncoding-92206ecb'], function (when, Check, _Math, Cartesian2, Transforms, RuntimeError, WebGLConstants, ComponentDatatype, AttributeCompression, IndexDatatype, IntersectionTests, Plane, WebMercatorProjection, createTaskProcessorWorker, EllipsoidTangentPlane, OrientedBoundingBox, TerrainEncoding) { 'use strict';
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/**
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* Provides terrain or other geometry for the surface of an ellipsoid. The surface geometry is
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* organized into a pyramid of tiles according to a {@link TilingScheme}. This type describes an
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* interface and is not intended to be instantiated directly.
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*
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* @alias TerrainProvider
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* @constructor
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*
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* @see EllipsoidTerrainProvider
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* @see CesiumTerrainProvider
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* @see VRTheWorldTerrainProvider
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* @see GoogleEarthEnterpriseTerrainProvider
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*/
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function TerrainProvider() {
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Check.DeveloperError.throwInstantiationError();
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}
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Object.defineProperties(TerrainProvider.prototype, {
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/**
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* Gets an event that is raised when the terrain provider encounters an asynchronous error.. By subscribing
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* to the event, you will be notified of the error and can potentially recover from it. Event listeners
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* are passed an instance of {@link TileProviderError}.
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* @memberof TerrainProvider.prototype
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* @type {Event}
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*/
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errorEvent : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets the credit to display when this terrain provider is active. Typically this is used to credit
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* the source of the terrain. This function should
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* not be called before {@link TerrainProvider#ready} returns true.
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* @memberof TerrainProvider.prototype
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* @type {Credit}
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*/
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credit : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets the tiling scheme used by the provider. This function should
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* not be called before {@link TerrainProvider#ready} returns true.
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* @memberof TerrainProvider.prototype
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* @type {TilingScheme}
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*/
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tilingScheme : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets a value indicating whether or not the provider is ready for use.
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* @memberof TerrainProvider.prototype
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* @type {Boolean}
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*/
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ready : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets a promise that resolves to true when the provider is ready for use.
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* @memberof TerrainProvider.prototype
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* @type {Promise.<Boolean>}
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* @readonly
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*/
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readyPromise : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets a value indicating whether or not the provider includes a water mask. The water mask
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* indicates which areas of the globe are water rather than land, so they can be rendered
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* as a reflective surface with animated waves. This function should not be
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* called before {@link TerrainProvider#ready} returns true.
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* @memberof TerrainProvider.prototype
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* @type {Boolean}
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*/
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hasWaterMask : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets a value indicating whether or not the requested tiles include vertex normals.
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* This function should not be called before {@link TerrainProvider#ready} returns true.
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* @memberof TerrainProvider.prototype
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* @type {Boolean}
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*/
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hasVertexNormals : {
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get : Check.DeveloperError.throwInstantiationError
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},
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/**
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* Gets an object that can be used to determine availability of terrain from this provider, such as
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* at points and in rectangles. This function should not be called before
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* {@link TerrainProvider#ready} returns true. This property may be undefined if availability
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* information is not available.
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* @memberof TerrainProvider.prototype
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* @type {TileAvailability}
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*/
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availability : {
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get : Check.DeveloperError.throwInstantiationError
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}
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});
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var regularGridIndicesCache = [];
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/**
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* Gets a list of indices for a triangle mesh representing a regular grid. Calling
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* this function multiple times with the same grid width and height returns the
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* same list of indices. The total number of vertices must be less than or equal
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* to 65536.
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*
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* @param {Number} width The number of vertices in the regular grid in the horizontal direction.
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* @param {Number} height The number of vertices in the regular grid in the vertical direction.
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* @returns {Uint16Array|Uint32Array} The list of indices. Uint16Array gets returned for 64KB or less and Uint32Array for 4GB or less.
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*/
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TerrainProvider.getRegularGridIndices = function(width, height) {
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//>>includeStart('debug', pragmas.debug);
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if (width * height >= _Math.CesiumMath.FOUR_GIGABYTES) {
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throw new Check.DeveloperError('The total number of vertices (width * height) must be less than 4,294,967,296.');
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}
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//>>includeEnd('debug');
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var byWidth = regularGridIndicesCache[width];
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if (!when.defined(byWidth)) {
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regularGridIndicesCache[width] = byWidth = [];
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}
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var indices = byWidth[height];
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if (!when.defined(indices)) {
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if (width * height < _Math.CesiumMath.SIXTY_FOUR_KILOBYTES) {
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indices = byWidth[height] = new Uint16Array((width - 1) * (height - 1) * 6);
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} else {
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indices = byWidth[height] = new Uint32Array((width - 1) * (height - 1) * 6);
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}
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addRegularGridIndices(width, height, indices, 0);
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}
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return indices;
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};
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var regularGridAndEdgeIndicesCache = [];
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/**
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* @private
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*/
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TerrainProvider.getRegularGridIndicesAndEdgeIndices = function(width, height) {
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//>>includeStart('debug', pragmas.debug);
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if (width * height >= _Math.CesiumMath.FOUR_GIGABYTES) {
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throw new Check.DeveloperError('The total number of vertices (width * height) must be less than 4,294,967,296.');
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}
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//>>includeEnd('debug');
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var byWidth = regularGridAndEdgeIndicesCache[width];
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if (!when.defined(byWidth)) {
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regularGridAndEdgeIndicesCache[width] = byWidth = [];
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}
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var indicesAndEdges = byWidth[height];
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if (!when.defined(indicesAndEdges)) {
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var indices = TerrainProvider.getRegularGridIndices(width, height);
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var edgeIndices = getEdgeIndices(width, height);
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var westIndicesSouthToNorth = edgeIndices.westIndicesSouthToNorth;
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var southIndicesEastToWest = edgeIndices.southIndicesEastToWest;
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var eastIndicesNorthToSouth = edgeIndices.eastIndicesNorthToSouth;
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var northIndicesWestToEast = edgeIndices.northIndicesWestToEast;
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indicesAndEdges = byWidth[height] = {
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indices : indices,
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westIndicesSouthToNorth : westIndicesSouthToNorth,
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southIndicesEastToWest : southIndicesEastToWest,
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eastIndicesNorthToSouth : eastIndicesNorthToSouth,
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northIndicesWestToEast : northIndicesWestToEast
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};
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}
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return indicesAndEdges;
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};
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var regularGridAndSkirtAndEdgeIndicesCache = [];
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/**
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* @private
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*/
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TerrainProvider.getRegularGridAndSkirtIndicesAndEdgeIndices = function(width, height) {
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//>>includeStart('debug', pragmas.debug);
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if (width * height >= _Math.CesiumMath.FOUR_GIGABYTES) {
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throw new Check.DeveloperError('The total number of vertices (width * height) must be less than 4,294,967,296.');
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}
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//>>includeEnd('debug');
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var byWidth = regularGridAndSkirtAndEdgeIndicesCache[width];
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if (!when.defined(byWidth)) {
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regularGridAndSkirtAndEdgeIndicesCache[width] = byWidth = [];
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}
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var indicesAndEdges = byWidth[height];
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if (!when.defined(indicesAndEdges)) {
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var gridVertexCount = width * height;
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var gridIndexCount = (width - 1) * (height - 1) * 6;
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var edgeVertexCount = width * 2 + height * 2;
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var edgeIndexCount = Math.max(0, edgeVertexCount - 4) * 6;
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var vertexCount = gridVertexCount + edgeVertexCount;
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var indexCount = gridIndexCount + edgeIndexCount;
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var edgeIndices = getEdgeIndices(width, height);
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var westIndicesSouthToNorth = edgeIndices.westIndicesSouthToNorth;
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var southIndicesEastToWest = edgeIndices.southIndicesEastToWest;
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var eastIndicesNorthToSouth = edgeIndices.eastIndicesNorthToSouth;
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var northIndicesWestToEast = edgeIndices.northIndicesWestToEast;
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var indices = IndexDatatype.IndexDatatype.createTypedArray(vertexCount, indexCount);
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addRegularGridIndices(width, height, indices, 0);
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TerrainProvider.addSkirtIndices(westIndicesSouthToNorth, southIndicesEastToWest, eastIndicesNorthToSouth, northIndicesWestToEast, gridVertexCount, indices, gridIndexCount);
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indicesAndEdges = byWidth[height] = {
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indices : indices,
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westIndicesSouthToNorth : westIndicesSouthToNorth,
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southIndicesEastToWest : southIndicesEastToWest,
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eastIndicesNorthToSouth : eastIndicesNorthToSouth,
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northIndicesWestToEast : northIndicesWestToEast,
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indexCountWithoutSkirts : gridIndexCount
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};
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}
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return indicesAndEdges;
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};
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/**
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* @private
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*/
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TerrainProvider.addSkirtIndices = function(westIndicesSouthToNorth, southIndicesEastToWest, eastIndicesNorthToSouth, northIndicesWestToEast, vertexCount, indices, offset) {
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var vertexIndex = vertexCount;
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offset = addSkirtIndices(westIndicesSouthToNorth, vertexIndex, indices, offset);
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vertexIndex += westIndicesSouthToNorth.length;
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offset = addSkirtIndices(southIndicesEastToWest, vertexIndex, indices, offset);
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vertexIndex += southIndicesEastToWest.length;
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offset = addSkirtIndices(eastIndicesNorthToSouth, vertexIndex, indices, offset);
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vertexIndex += eastIndicesNorthToSouth.length;
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addSkirtIndices(northIndicesWestToEast, vertexIndex, indices, offset);
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};
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function getEdgeIndices(width, height) {
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var westIndicesSouthToNorth = new Array(height);
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var southIndicesEastToWest = new Array(width);
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var eastIndicesNorthToSouth = new Array(height);
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var northIndicesWestToEast = new Array(width);
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var i;
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for (i = 0; i < width; ++i) {
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northIndicesWestToEast[i] = i;
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southIndicesEastToWest[i] = width * height - 1 - i;
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}
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for (i = 0; i < height; ++i) {
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eastIndicesNorthToSouth[i] = (i + 1) * width - 1;
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westIndicesSouthToNorth[i] = (height - i - 1) * width;
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}
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return {
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westIndicesSouthToNorth : westIndicesSouthToNorth,
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southIndicesEastToWest : southIndicesEastToWest,
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eastIndicesNorthToSouth : eastIndicesNorthToSouth,
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northIndicesWestToEast : northIndicesWestToEast
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};
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}
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function addRegularGridIndices(width, height, indices, offset) {
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var index = 0;
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for (var j = 0; j < height - 1; ++j) {
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for (var i = 0; i < width - 1; ++i) {
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var upperLeft = index;
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var lowerLeft = upperLeft + width;
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var lowerRight = lowerLeft + 1;
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var upperRight = upperLeft + 1;
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indices[offset++] = upperLeft;
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indices[offset++] = lowerLeft;
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indices[offset++] = upperRight;
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indices[offset++] = upperRight;
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indices[offset++] = lowerLeft;
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indices[offset++] = lowerRight;
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++index;
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}
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++index;
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}
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}
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function addSkirtIndices(edgeIndices, vertexIndex, indices, offset) {
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var previousIndex = edgeIndices[0];
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var length = edgeIndices.length;
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for (var i = 1; i < length; ++i) {
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var index = edgeIndices[i];
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indices[offset++] = previousIndex;
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indices[offset++] = index;
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indices[offset++] = vertexIndex;
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indices[offset++] = vertexIndex;
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indices[offset++] = index;
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indices[offset++] = vertexIndex + 1;
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previousIndex = index;
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++vertexIndex;
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}
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return offset;
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}
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/**
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* Specifies the quality of terrain created from heightmaps. A value of 1.0 will
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* ensure that adjacent heightmap vertices are separated by no more than
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* {@link Globe.maximumScreenSpaceError} screen pixels and will probably go very slowly.
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* A value of 0.5 will cut the estimated level zero geometric error in half, allowing twice the
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* screen pixels between adjacent heightmap vertices and thus rendering more quickly.
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* @type {Number}
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*/
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TerrainProvider.heightmapTerrainQuality = 0.25;
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/**
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* Determines an appropriate geometric error estimate when the geometry comes from a heightmap.
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*
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* @param {Ellipsoid} ellipsoid The ellipsoid to which the terrain is attached.
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* @param {Number} tileImageWidth The width, in pixels, of the heightmap associated with a single tile.
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* @param {Number} numberOfTilesAtLevelZero The number of tiles in the horizontal direction at tile level zero.
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* @returns {Number} An estimated geometric error.
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*/
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TerrainProvider.getEstimatedLevelZeroGeometricErrorForAHeightmap = function(ellipsoid, tileImageWidth, numberOfTilesAtLevelZero) {
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return ellipsoid.maximumRadius * 2 * Math.PI * TerrainProvider.heightmapTerrainQuality / (tileImageWidth * numberOfTilesAtLevelZero);
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};
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/**
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* Requests the geometry for a given tile. This function should not be called before
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* {@link TerrainProvider#ready} returns true. The result must include terrain data and
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* may optionally include a water mask and an indication of which child tiles are available.
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* @function
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*
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* @param {Number} x The X coordinate of the tile for which to request geometry.
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* @param {Number} y The Y coordinate of the tile for which to request geometry.
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* @param {Number} level The level of the tile for which to request geometry.
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* @param {Request} [request] The request object. Intended for internal use only.
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*
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* @returns {Promise.<TerrainData>|undefined} A promise for the requested geometry. If this method
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* returns undefined instead of a promise, it is an indication that too many requests are already
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* pending and the request will be retried later.
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*/
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TerrainProvider.prototype.requestTileGeometry = Check.DeveloperError.throwInstantiationError;
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/**
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* Gets the maximum geometric error allowed in a tile at a given level. This function should not be
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* called before {@link TerrainProvider#ready} returns true.
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* @function
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*
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* @param {Number} level The tile level for which to get the maximum geometric error.
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* @returns {Number} The maximum geometric error.
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*/
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TerrainProvider.prototype.getLevelMaximumGeometricError = Check.DeveloperError.throwInstantiationError;
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/**
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* Determines whether data for a tile is available to be loaded.
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* @function
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*
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* @param {Number} x The X coordinate of the tile for which to request geometry.
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* @param {Number} y The Y coordinate of the tile for which to request geometry.
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* @param {Number} level The level of the tile for which to request geometry.
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* @returns {Boolean} Undefined if not supported by the terrain provider, otherwise true or false.
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*/
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TerrainProvider.prototype.getTileDataAvailable = Check.DeveloperError.throwInstantiationError;
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/**
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* Makes sure we load availability data for a tile
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* @function
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*
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* @param {Number} x The X coordinate of the tile for which to request geometry.
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* @param {Number} y The Y coordinate of the tile for which to request geometry.
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* @param {Number} level The level of the tile for which to request geometry.
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* @returns {undefined|Promise} Undefined if nothing need to be loaded or a Promise that resolves when all required tiles are loaded
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*/
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TerrainProvider.prototype.loadTileDataAvailability = Check.DeveloperError.throwInstantiationError;
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var maxShort = 32767;
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var cartesian3Scratch = new Cartesian2.Cartesian3();
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var scratchMinimum = new Cartesian2.Cartesian3();
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var scratchMaximum = new Cartesian2.Cartesian3();
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var cartographicScratch = new Cartesian2.Cartographic();
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var toPack = new Cartesian2.Cartesian2();
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var scratchNormal = new Cartesian2.Cartesian3();
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var scratchToENU = new Transforms.Matrix4();
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var scratchFromENU = new Transforms.Matrix4();
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function createVerticesFromQuantizedTerrainMesh(parameters, transferableObjects) {
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var quantizedVertices = parameters.quantizedVertices;
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var quantizedVertexCount = quantizedVertices.length / 3;
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var octEncodedNormals = parameters.octEncodedNormals;
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var edgeVertexCount = parameters.westIndices.length + parameters.eastIndices.length +
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parameters.southIndices.length + parameters.northIndices.length;
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var includeWebMercatorT = parameters.includeWebMercatorT;
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var rectangle = Cartesian2.Rectangle.clone(parameters.rectangle);
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var west = rectangle.west;
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var south = rectangle.south;
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var east = rectangle.east;
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var north = rectangle.north;
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var ellipsoid = Cartesian2.Ellipsoid.clone(parameters.ellipsoid);
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var exaggeration = parameters.exaggeration;
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var minimumHeight = parameters.minimumHeight * exaggeration;
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var maximumHeight = parameters.maximumHeight * exaggeration;
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var center = parameters.relativeToCenter;
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var fromENU = Transforms.Transforms.eastNorthUpToFixedFrame(center, ellipsoid);
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var toENU = Transforms.Matrix4.inverseTransformation(fromENU, new Transforms.Matrix4());
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var southMercatorY;
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var oneOverMercatorHeight;
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if (includeWebMercatorT) {
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southMercatorY = WebMercatorProjection.WebMercatorProjection.geodeticLatitudeToMercatorAngle(south);
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oneOverMercatorHeight = 1.0 / (WebMercatorProjection.WebMercatorProjection.geodeticLatitudeToMercatorAngle(north) - southMercatorY);
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}
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var uBuffer = quantizedVertices.subarray(0, quantizedVertexCount);
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var vBuffer = quantizedVertices.subarray(quantizedVertexCount, 2 * quantizedVertexCount);
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var heightBuffer = quantizedVertices.subarray(quantizedVertexCount * 2, 3 * quantizedVertexCount);
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var hasVertexNormals = when.defined(octEncodedNormals);
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var uvs = new Array(quantizedVertexCount);
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var heights = new Array(quantizedVertexCount);
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var positions = new Array(quantizedVertexCount);
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var webMercatorTs = includeWebMercatorT ? new Array(quantizedVertexCount) : [];
|
|
|
|
var minimum = scratchMinimum;
|
|
minimum.x = Number.POSITIVE_INFINITY;
|
|
minimum.y = Number.POSITIVE_INFINITY;
|
|
minimum.z = Number.POSITIVE_INFINITY;
|
|
|
|
var maximum = scratchMaximum;
|
|
maximum.x = Number.NEGATIVE_INFINITY;
|
|
maximum.y = Number.NEGATIVE_INFINITY;
|
|
maximum.z = Number.NEGATIVE_INFINITY;
|
|
|
|
var minLongitude = Number.POSITIVE_INFINITY;
|
|
var maxLongitude = Number.NEGATIVE_INFINITY;
|
|
var minLatitude = Number.POSITIVE_INFINITY;
|
|
var maxLatitude = Number.NEGATIVE_INFINITY;
|
|
|
|
for (var i = 0; i < quantizedVertexCount; ++i) {
|
|
var rawU = uBuffer[i];
|
|
var rawV = vBuffer[i];
|
|
|
|
var u = rawU / maxShort;
|
|
var v = rawV / maxShort;
|
|
var height = _Math.CesiumMath.lerp(minimumHeight, maximumHeight, heightBuffer[i] / maxShort);
|
|
|
|
cartographicScratch.longitude = _Math.CesiumMath.lerp(west, east, u);
|
|
cartographicScratch.latitude = _Math.CesiumMath.lerp(south, north, v);
|
|
cartographicScratch.height = height;
|
|
|
|
minLongitude = Math.min(cartographicScratch.longitude, minLongitude);
|
|
maxLongitude = Math.max(cartographicScratch.longitude, maxLongitude);
|
|
minLatitude = Math.min(cartographicScratch.latitude, minLatitude);
|
|
maxLatitude = Math.max(cartographicScratch.latitude, maxLatitude);
|
|
|
|
var position = ellipsoid.cartographicToCartesian(cartographicScratch);
|
|
|
|
uvs[i] = new Cartesian2.Cartesian2(u, v);
|
|
heights[i] = height;
|
|
positions[i] = position;
|
|
|
|
if (includeWebMercatorT) {
|
|
webMercatorTs[i] = (WebMercatorProjection.WebMercatorProjection.geodeticLatitudeToMercatorAngle(cartographicScratch.latitude) - southMercatorY) * oneOverMercatorHeight;
|
|
}
|
|
|
|
Transforms.Matrix4.multiplyByPoint(toENU, position, cartesian3Scratch);
|
|
|
|
Cartesian2.Cartesian3.minimumByComponent(cartesian3Scratch, minimum, minimum);
|
|
Cartesian2.Cartesian3.maximumByComponent(cartesian3Scratch, maximum, maximum);
|
|
}
|
|
|
|
var westIndicesSouthToNorth = copyAndSort(parameters.westIndices, function(a, b) {
|
|
return uvs[a].y - uvs[b].y;
|
|
});
|
|
var eastIndicesNorthToSouth = copyAndSort(parameters.eastIndices, function(a, b) {
|
|
return uvs[b].y - uvs[a].y;
|
|
});
|
|
var southIndicesEastToWest = copyAndSort(parameters.southIndices, function(a, b) {
|
|
return uvs[b].x - uvs[a].x;
|
|
});
|
|
var northIndicesWestToEast = copyAndSort(parameters.northIndices, function(a, b) {
|
|
return uvs[a].x - uvs[b].x;
|
|
});
|
|
|
|
var orientedBoundingBox;
|
|
var boundingSphere;
|
|
|
|
if (exaggeration !== 1.0) {
|
|
// Bounding volumes need to be recomputed since the tile payload assumes no exaggeration.
|
|
boundingSphere = Transforms.BoundingSphere.fromPoints(positions);
|
|
orientedBoundingBox = OrientedBoundingBox.OrientedBoundingBox.fromRectangle(rectangle, minimumHeight, maximumHeight, ellipsoid);
|
|
}
|
|
|
|
var occludeePointInScaledSpace;
|
|
if (exaggeration !== 1.0 || minimumHeight < 0.0) {
|
|
// Horizon culling point needs to be recomputed since the tile payload assumes no exaggeration.
|
|
var occluder = new TerrainEncoding.EllipsoidalOccluder(ellipsoid);
|
|
occludeePointInScaledSpace = occluder.computeHorizonCullingPointPossiblyUnderEllipsoid(center, positions, minimumHeight);
|
|
}
|
|
|
|
var hMin = minimumHeight;
|
|
hMin = Math.min(hMin, findMinMaxSkirts(parameters.westIndices, parameters.westSkirtHeight, heights, uvs, rectangle, ellipsoid, toENU, minimum, maximum));
|
|
hMin = Math.min(hMin, findMinMaxSkirts(parameters.southIndices, parameters.southSkirtHeight, heights, uvs, rectangle, ellipsoid, toENU, minimum, maximum));
|
|
hMin = Math.min(hMin, findMinMaxSkirts(parameters.eastIndices, parameters.eastSkirtHeight, heights, uvs, rectangle, ellipsoid, toENU, minimum, maximum));
|
|
hMin = Math.min(hMin, findMinMaxSkirts(parameters.northIndices, parameters.northSkirtHeight, heights, uvs, rectangle, ellipsoid, toENU, minimum, maximum));
|
|
|
|
var aaBox = new EllipsoidTangentPlane.AxisAlignedBoundingBox(minimum, maximum, center);
|
|
var encoding = new TerrainEncoding.TerrainEncoding(aaBox, hMin, maximumHeight, fromENU, hasVertexNormals, includeWebMercatorT);
|
|
var vertexStride = encoding.getStride();
|
|
var size = quantizedVertexCount * vertexStride + edgeVertexCount * vertexStride;
|
|
var vertexBuffer = new Float32Array(size);
|
|
|
|
var bufferIndex = 0;
|
|
for (var j = 0; j < quantizedVertexCount; ++j) {
|
|
if (hasVertexNormals) {
|
|
var n = j * 2.0;
|
|
toPack.x = octEncodedNormals[n];
|
|
toPack.y = octEncodedNormals[n + 1];
|
|
|
|
if (exaggeration !== 1.0) {
|
|
var normal = AttributeCompression.AttributeCompression.octDecode(toPack.x, toPack.y, scratchNormal);
|
|
var fromENUNormal = Transforms.Transforms.eastNorthUpToFixedFrame(positions[j], ellipsoid, scratchFromENU);
|
|
var toENUNormal = Transforms.Matrix4.inverseTransformation(fromENUNormal, scratchToENU);
|
|
|
|
Transforms.Matrix4.multiplyByPointAsVector(toENUNormal, normal, normal);
|
|
normal.z *= exaggeration;
|
|
Cartesian2.Cartesian3.normalize(normal, normal);
|
|
|
|
Transforms.Matrix4.multiplyByPointAsVector(fromENUNormal, normal, normal);
|
|
Cartesian2.Cartesian3.normalize(normal, normal);
|
|
|
|
AttributeCompression.AttributeCompression.octEncode(normal, toPack);
|
|
}
|
|
}
|
|
|
|
bufferIndex = encoding.encode(vertexBuffer, bufferIndex, positions[j], uvs[j], heights[j], toPack, webMercatorTs[j]);
|
|
}
|
|
|
|
var edgeTriangleCount = Math.max(0, (edgeVertexCount - 4) * 2);
|
|
var indexBufferLength = parameters.indices.length + edgeTriangleCount * 3;
|
|
var indexBuffer = IndexDatatype.IndexDatatype.createTypedArray(quantizedVertexCount + edgeVertexCount, indexBufferLength);
|
|
indexBuffer.set(parameters.indices, 0);
|
|
|
|
var percentage = 0.0001;
|
|
var lonOffset = (maxLongitude - minLongitude) * percentage;
|
|
var latOffset = (maxLatitude - minLatitude) * percentage;
|
|
var westLongitudeOffset = -lonOffset;
|
|
var westLatitudeOffset = 0.0;
|
|
var eastLongitudeOffset = lonOffset;
|
|
var eastLatitudeOffset = 0.0;
|
|
var northLongitudeOffset = 0.0;
|
|
var northLatitudeOffset = latOffset;
|
|
var southLongitudeOffset = 0.0;
|
|
var southLatitudeOffset = -latOffset;
|
|
|
|
// Add skirts.
|
|
var vertexBufferIndex = quantizedVertexCount * vertexStride;
|
|
addSkirt(vertexBuffer, vertexBufferIndex, westIndicesSouthToNorth, encoding, heights, uvs, octEncodedNormals, ellipsoid, rectangle, parameters.westSkirtHeight, exaggeration, southMercatorY, oneOverMercatorHeight, westLongitudeOffset, westLatitudeOffset);
|
|
vertexBufferIndex += parameters.westIndices.length * vertexStride;
|
|
addSkirt(vertexBuffer, vertexBufferIndex, southIndicesEastToWest, encoding, heights, uvs, octEncodedNormals, ellipsoid, rectangle, parameters.southSkirtHeight, exaggeration, southMercatorY, oneOverMercatorHeight, southLongitudeOffset, southLatitudeOffset);
|
|
vertexBufferIndex += parameters.southIndices.length * vertexStride;
|
|
addSkirt(vertexBuffer, vertexBufferIndex, eastIndicesNorthToSouth, encoding, heights, uvs, octEncodedNormals, ellipsoid, rectangle, parameters.eastSkirtHeight, exaggeration, southMercatorY, oneOverMercatorHeight, eastLongitudeOffset, eastLatitudeOffset);
|
|
vertexBufferIndex += parameters.eastIndices.length * vertexStride;
|
|
addSkirt(vertexBuffer, vertexBufferIndex, northIndicesWestToEast, encoding, heights, uvs, octEncodedNormals, ellipsoid, rectangle, parameters.northSkirtHeight, exaggeration, southMercatorY, oneOverMercatorHeight, northLongitudeOffset, northLatitudeOffset);
|
|
|
|
TerrainProvider.addSkirtIndices(westIndicesSouthToNorth, southIndicesEastToWest, eastIndicesNorthToSouth, northIndicesWestToEast, quantizedVertexCount, indexBuffer, parameters.indices.length);
|
|
|
|
transferableObjects.push(vertexBuffer.buffer, indexBuffer.buffer);
|
|
|
|
return {
|
|
vertices : vertexBuffer.buffer,
|
|
indices : indexBuffer.buffer,
|
|
westIndicesSouthToNorth : westIndicesSouthToNorth,
|
|
southIndicesEastToWest : southIndicesEastToWest,
|
|
eastIndicesNorthToSouth : eastIndicesNorthToSouth,
|
|
northIndicesWestToEast : northIndicesWestToEast,
|
|
vertexStride : vertexStride,
|
|
center : center,
|
|
minimumHeight : minimumHeight,
|
|
maximumHeight : maximumHeight,
|
|
boundingSphere : boundingSphere,
|
|
orientedBoundingBox : orientedBoundingBox,
|
|
occludeePointInScaledSpace : occludeePointInScaledSpace,
|
|
encoding : encoding,
|
|
indexCountWithoutSkirts : parameters.indices.length
|
|
};
|
|
}
|
|
|
|
function findMinMaxSkirts(edgeIndices, edgeHeight, heights, uvs, rectangle, ellipsoid, toENU, minimum, maximum) {
|
|
var hMin = Number.POSITIVE_INFINITY;
|
|
|
|
var north = rectangle.north;
|
|
var south = rectangle.south;
|
|
var east = rectangle.east;
|
|
var west = rectangle.west;
|
|
|
|
if (east < west) {
|
|
east += _Math.CesiumMath.TWO_PI;
|
|
}
|
|
|
|
var length = edgeIndices.length;
|
|
for (var i = 0; i < length; ++i) {
|
|
var index = edgeIndices[i];
|
|
var h = heights[index];
|
|
var uv = uvs[index];
|
|
|
|
cartographicScratch.longitude = _Math.CesiumMath.lerp(west, east, uv.x);
|
|
cartographicScratch.latitude = _Math.CesiumMath.lerp(south, north, uv.y);
|
|
cartographicScratch.height = h - edgeHeight;
|
|
|
|
var position = ellipsoid.cartographicToCartesian(cartographicScratch, cartesian3Scratch);
|
|
Transforms.Matrix4.multiplyByPoint(toENU, position, position);
|
|
|
|
Cartesian2.Cartesian3.minimumByComponent(position, minimum, minimum);
|
|
Cartesian2.Cartesian3.maximumByComponent(position, maximum, maximum);
|
|
|
|
hMin = Math.min(hMin, cartographicScratch.height);
|
|
}
|
|
return hMin;
|
|
}
|
|
|
|
function addSkirt(vertexBuffer, vertexBufferIndex, edgeVertices, encoding, heights, uvs, octEncodedNormals, ellipsoid, rectangle, skirtLength, exaggeration, southMercatorY, oneOverMercatorHeight, longitudeOffset, latitudeOffset) {
|
|
var hasVertexNormals = when.defined(octEncodedNormals);
|
|
|
|
var north = rectangle.north;
|
|
var south = rectangle.south;
|
|
var east = rectangle.east;
|
|
var west = rectangle.west;
|
|
|
|
if (east < west) {
|
|
east += _Math.CesiumMath.TWO_PI;
|
|
}
|
|
|
|
var length = edgeVertices.length;
|
|
for (var i = 0; i < length; ++i) {
|
|
var index = edgeVertices[i];
|
|
var h = heights[index];
|
|
var uv = uvs[index];
|
|
|
|
cartographicScratch.longitude = _Math.CesiumMath.lerp(west, east, uv.x) + longitudeOffset;
|
|
cartographicScratch.latitude = _Math.CesiumMath.lerp(south, north, uv.y) + latitudeOffset;
|
|
cartographicScratch.height = h - skirtLength;
|
|
|
|
var position = ellipsoid.cartographicToCartesian(cartographicScratch, cartesian3Scratch);
|
|
|
|
if (hasVertexNormals) {
|
|
var n = index * 2.0;
|
|
toPack.x = octEncodedNormals[n];
|
|
toPack.y = octEncodedNormals[n + 1];
|
|
|
|
if (exaggeration !== 1.0) {
|
|
var normal = AttributeCompression.AttributeCompression.octDecode(toPack.x, toPack.y, scratchNormal);
|
|
var fromENUNormal = Transforms.Transforms.eastNorthUpToFixedFrame(cartesian3Scratch, ellipsoid, scratchFromENU);
|
|
var toENUNormal = Transforms.Matrix4.inverseTransformation(fromENUNormal, scratchToENU);
|
|
|
|
Transforms.Matrix4.multiplyByPointAsVector(toENUNormal, normal, normal);
|
|
normal.z *= exaggeration;
|
|
Cartesian2.Cartesian3.normalize(normal, normal);
|
|
|
|
Transforms.Matrix4.multiplyByPointAsVector(fromENUNormal, normal, normal);
|
|
Cartesian2.Cartesian3.normalize(normal, normal);
|
|
|
|
AttributeCompression.AttributeCompression.octEncode(normal, toPack);
|
|
}
|
|
}
|
|
|
|
var webMercatorT;
|
|
if (encoding.hasWebMercatorT) {
|
|
webMercatorT = (WebMercatorProjection.WebMercatorProjection.geodeticLatitudeToMercatorAngle(cartographicScratch.latitude) - southMercatorY) * oneOverMercatorHeight;
|
|
}
|
|
|
|
vertexBufferIndex = encoding.encode(vertexBuffer, vertexBufferIndex, position, uv, cartographicScratch.height, toPack, webMercatorT);
|
|
}
|
|
}
|
|
|
|
function copyAndSort(typedArray, comparator) {
|
|
var copy;
|
|
if (typeof typedArray.slice === 'function') {
|
|
copy = typedArray.slice();
|
|
if (typeof copy.sort !== 'function') {
|
|
// Sliced typed array isn't sortable, so we can't use it.
|
|
copy = undefined;
|
|
}
|
|
}
|
|
|
|
if (!when.defined(copy)) {
|
|
copy = Array.prototype.slice.call(typedArray);
|
|
}
|
|
|
|
copy.sort(comparator);
|
|
|
|
return copy;
|
|
}
|
|
var createVerticesFromQuantizedTerrainMesh$1 = createTaskProcessorWorker(createVerticesFromQuantizedTerrainMesh);
|
|
|
|
return createVerticesFromQuantizedTerrainMesh$1;
|
|
|
|
});
|
|
//# sourceMappingURL=createVerticesFromQuantizedTerrainMesh.js.map
|