706 lines
29 KiB
JavaScript
706 lines
29 KiB
JavaScript
/**
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* Cesium - https://github.com/AnalyticalGraphicsInc/cesium
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*
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* Copyright 2011-2017 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/AnalyticalGraphicsInc/cesium/blob/master/LICENSE.md for full licensing details.
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*/
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define(['exports', './when-8d13db60', './Math-61ede240', './Cartographic-fe4be337', './Cartesian2-85064f09', './BoundingSphere-775c5788', './ComponentDatatype-5862616f', './GeometryAttribute-91704ebb', './PrimitiveType-97893bc7', './Transforms-b2e71640', './GeometryAttributes-aacecde6', './GeometryPipeline-f95a0a6f', './IndexDatatype-9435b55f', './arrayRemoveDuplicates-f0b089b1', './ArcType-66bc286a', './EllipsoidRhumbLine-f161e674', './PolygonPipeline-6a35d737'], function (exports, when, _Math, Cartographic, Cartesian2, BoundingSphere, ComponentDatatype, GeometryAttribute, PrimitiveType, Transforms, GeometryAttributes, GeometryPipeline, IndexDatatype, arrayRemoveDuplicates, ArcType, EllipsoidRhumbLine, PolygonPipeline) { 'use strict';
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/**
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* A queue that can enqueue items at the end, and dequeue items from the front.
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*
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* @alias Queue
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* @constructor
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*/
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function Queue() {
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this._array = [];
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this._offset = 0;
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this._length = 0;
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}
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Object.defineProperties(Queue.prototype, {
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/**
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* The length of the queue.
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*
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* @memberof Queue.prototype
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*
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* @type {Number}
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* @readonly
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*/
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length : {
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get : function() {
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return this._length;
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}
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}
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});
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/**
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* Enqueues the specified item.
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*
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* @param {*} item The item to enqueue.
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*/
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Queue.prototype.enqueue = function(item) {
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this._array.push(item);
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this._length++;
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};
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/**
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* Dequeues an item. Returns undefined if the queue is empty.
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*
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* @returns {*} The the dequeued item.
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*/
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Queue.prototype.dequeue = function() {
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if (this._length === 0) {
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return undefined;
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}
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var array = this._array;
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var offset = this._offset;
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var item = array[offset];
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array[offset] = undefined;
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offset++;
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if ((offset > 10) && (offset * 2 > array.length)) {
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//compact array
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this._array = array.slice(offset);
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offset = 0;
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}
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this._offset = offset;
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this._length--;
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return item;
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};
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/**
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* Returns the item at the front of the queue. Returns undefined if the queue is empty.
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*
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* @returns {*} The item at the front of the queue.
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*/
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Queue.prototype.peek = function() {
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if (this._length === 0) {
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return undefined;
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}
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return this._array[this._offset];
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};
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/**
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* Check whether this queue contains the specified item.
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*
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* @param {*} item The item to search for.
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*/
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Queue.prototype.contains = function(item) {
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return this._array.indexOf(item) !== -1;
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};
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/**
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* Remove all items from the queue.
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*/
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Queue.prototype.clear = function() {
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this._array.length = this._offset = this._length = 0;
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};
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/**
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* Sort the items in the queue in-place.
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*
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* @param {Queue~Comparator} compareFunction A function that defines the sort order.
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*/
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Queue.prototype.sort = function(compareFunction) {
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if (this._offset > 0) {
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//compact array
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this._array = this._array.slice(this._offset);
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this._offset = 0;
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}
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this._array.sort(compareFunction);
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};
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/**
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* @private
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*/
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var PolygonGeometryLibrary = {};
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PolygonGeometryLibrary.computeHierarchyPackedLength = function(polygonHierarchy) {
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var numComponents = 0;
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var stack = [polygonHierarchy];
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while (stack.length > 0) {
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var hierarchy = stack.pop();
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if (!when.defined(hierarchy)) {
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continue;
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}
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numComponents += 2;
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var positions = hierarchy.positions;
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var holes = hierarchy.holes;
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if (when.defined(positions)) {
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numComponents += positions.length * Cartographic.Cartesian3.packedLength;
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}
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if (when.defined(holes)) {
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var length = holes.length;
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for (var i = 0; i < length; ++i) {
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stack.push(holes[i]);
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}
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}
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}
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return numComponents;
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};
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PolygonGeometryLibrary.packPolygonHierarchy = function(polygonHierarchy, array, startingIndex) {
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var stack = [polygonHierarchy];
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while (stack.length > 0) {
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var hierarchy = stack.pop();
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if (!when.defined(hierarchy)) {
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continue;
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}
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var positions = hierarchy.positions;
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var holes = hierarchy.holes;
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array[startingIndex++] = when.defined(positions) ? positions.length : 0;
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array[startingIndex++] = when.defined(holes) ? holes.length : 0;
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if (when.defined(positions)) {
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var positionsLength = positions.length;
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for (var i = 0; i < positionsLength; ++i, startingIndex += 3) {
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Cartographic.Cartesian3.pack(positions[i], array, startingIndex);
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}
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}
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if (when.defined(holes)) {
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var holesLength = holes.length;
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for (var j = 0; j < holesLength; ++j) {
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stack.push(holes[j]);
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}
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}
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}
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return startingIndex;
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};
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PolygonGeometryLibrary.unpackPolygonHierarchy = function(array, startingIndex) {
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var positionsLength = array[startingIndex++];
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var holesLength = array[startingIndex++];
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var positions = new Array(positionsLength);
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var holes = holesLength > 0 ? new Array(holesLength) : undefined;
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for (var i = 0; i < positionsLength; ++i, startingIndex += Cartographic.Cartesian3.packedLength) {
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positions[i] = Cartographic.Cartesian3.unpack(array, startingIndex);
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}
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for (var j = 0; j < holesLength; ++j) {
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holes[j] = PolygonGeometryLibrary.unpackPolygonHierarchy(array, startingIndex);
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startingIndex = holes[j].startingIndex;
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delete holes[j].startingIndex;
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}
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return {
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positions : positions,
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holes : holes,
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startingIndex : startingIndex
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};
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};
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var distanceScratch = new Cartographic.Cartesian3();
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function getPointAtDistance(p0, p1, distance, length) {
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Cartographic.Cartesian3.subtract(p1, p0, distanceScratch);
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Cartographic.Cartesian3.multiplyByScalar(distanceScratch, distance / length, distanceScratch);
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Cartographic.Cartesian3.add(p0, distanceScratch, distanceScratch);
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return [distanceScratch.x, distanceScratch.y, distanceScratch.z];
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}
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PolygonGeometryLibrary.subdivideLineCount = function(p0, p1, minDistance) {
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var distance = Cartographic.Cartesian3.distance(p0, p1);
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var n = distance / minDistance;
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var countDivide = Math.max(0, Math.ceil(_Math.CesiumMath.log2(n)));
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return Math.pow(2, countDivide);
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};
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var scratchCartographic0 = new Cartographic.Cartographic();
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var scratchCartographic1 = new Cartographic.Cartographic();
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var scratchCartographic2 = new Cartographic.Cartographic();
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var scratchCartesian0 = new Cartographic.Cartesian3();
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PolygonGeometryLibrary.subdivideRhumbLineCount = function(ellipsoid, p0, p1, minDistance) {
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var c0 = ellipsoid.cartesianToCartographic(p0, scratchCartographic0);
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var c1 = ellipsoid.cartesianToCartographic(p1, scratchCartographic1);
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var rhumb = new EllipsoidRhumbLine.EllipsoidRhumbLine(c0, c1, ellipsoid);
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var n = rhumb.surfaceDistance / minDistance;
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var countDivide = Math.max(0, Math.ceil(_Math.CesiumMath.log2(n)));
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return Math.pow(2, countDivide);
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};
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PolygonGeometryLibrary.subdivideLine = function(p0, p1, minDistance, result) {
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var numVertices = PolygonGeometryLibrary.subdivideLineCount(p0, p1, minDistance);
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var length = Cartographic.Cartesian3.distance(p0, p1);
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var distanceBetweenVertices = length / numVertices;
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if (!when.defined(result)) {
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result = [];
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}
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var positions = result;
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positions.length = numVertices * 3;
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var index = 0;
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for ( var i = 0; i < numVertices; i++) {
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var p = getPointAtDistance(p0, p1, i * distanceBetweenVertices, length);
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positions[index++] = p[0];
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positions[index++] = p[1];
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positions[index++] = p[2];
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}
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return positions;
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};
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PolygonGeometryLibrary.subdivideRhumbLine = function(ellipsoid, p0, p1, minDistance, result) {
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var c0 = ellipsoid.cartesianToCartographic(p0, scratchCartographic0);
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var c1 = ellipsoid.cartesianToCartographic(p1, scratchCartographic1);
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var rhumb = new EllipsoidRhumbLine.EllipsoidRhumbLine(c0, c1, ellipsoid);
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var n = rhumb.surfaceDistance / minDistance;
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var countDivide = Math.max(0, Math.ceil(_Math.CesiumMath.log2(n)));
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var numVertices = Math.pow(2, countDivide);
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var distanceBetweenVertices = rhumb.surfaceDistance / numVertices;
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if (!when.defined(result)) {
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result = [];
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}
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var positions = result;
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positions.length = numVertices * 3;
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var index = 0;
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for ( var i = 0; i < numVertices; i++) {
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var c = rhumb.interpolateUsingSurfaceDistance(i * distanceBetweenVertices, scratchCartographic2);
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var p = ellipsoid.cartographicToCartesian(c, scratchCartesian0);
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positions[index++] = p.x;
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positions[index++] = p.y;
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positions[index++] = p.z;
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}
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return positions;
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};
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var scaleToGeodeticHeightN1 = new Cartographic.Cartesian3();
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var scaleToGeodeticHeightN2 = new Cartographic.Cartesian3();
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var scaleToGeodeticHeightP1 = new Cartographic.Cartesian3();
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var scaleToGeodeticHeightP2 = new Cartographic.Cartesian3();
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PolygonGeometryLibrary.scaleToGeodeticHeightExtruded = function(geometry, maxHeight, minHeight, ellipsoid, perPositionHeight) {
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ellipsoid = when.defaultValue(ellipsoid, Cartesian2.Ellipsoid.WGS84);
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var n1 = scaleToGeodeticHeightN1;
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var n2 = scaleToGeodeticHeightN2;
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var p = scaleToGeodeticHeightP1;
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var p2 = scaleToGeodeticHeightP2;
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if (when.defined(geometry) && when.defined(geometry.attributes) && when.defined(geometry.attributes.position)) {
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var positions = geometry.attributes.position.values;
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var length = positions.length / 2;
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for ( var i = 0; i < length; i += 3) {
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Cartographic.Cartesian3.fromArray(positions, i, p);
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ellipsoid.geodeticSurfaceNormal(p, n1);
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p2 = ellipsoid.scaleToGeodeticSurface(p, p2);
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n2 = Cartographic.Cartesian3.multiplyByScalar(n1, minHeight, n2);
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n2 = Cartographic.Cartesian3.add(p2, n2, n2);
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positions[i + length] = n2.x;
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positions[i + 1 + length] = n2.y;
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positions[i + 2 + length] = n2.z;
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if (perPositionHeight) {
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p2 = Cartographic.Cartesian3.clone(p, p2);
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}
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n2 = Cartographic.Cartesian3.multiplyByScalar(n1, maxHeight, n2);
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n2 = Cartographic.Cartesian3.add(p2, n2, n2);
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positions[i] = n2.x;
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positions[i + 1] = n2.y;
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positions[i + 2] = n2.z;
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}
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}
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return geometry;
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};
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PolygonGeometryLibrary.polygonOutlinesFromHierarchy = function(polygonHierarchy, scaleToEllipsoidSurface, ellipsoid) {
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// create from a polygon hierarchy
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// Algorithm adapted from http://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf
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var polygons = [];
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var queue = new Queue();
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queue.enqueue(polygonHierarchy);
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var i;
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var j;
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var length;
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while (queue.length !== 0) {
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var outerNode = queue.dequeue();
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var outerRing = outerNode.positions;
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if (scaleToEllipsoidSurface) {
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length = outerRing.length;
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for (i = 0; i < length; i++) {
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ellipsoid.scaleToGeodeticSurface(outerRing[i], outerRing[i]);
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}
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}
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outerRing = arrayRemoveDuplicates.arrayRemoveDuplicates(outerRing, Cartographic.Cartesian3.equalsEpsilon, true);
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if (outerRing.length < 3) {
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continue;
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}
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var numChildren = outerNode.holes ? outerNode.holes.length : 0;
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// The outer polygon contains inner polygons
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for (i = 0; i < numChildren; i++) {
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var hole = outerNode.holes[i];
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var holePositions = hole.positions;
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if (scaleToEllipsoidSurface) {
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length = holePositions.length;
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for (j = 0; j < length; ++j) {
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ellipsoid.scaleToGeodeticSurface(holePositions[j], holePositions[j]);
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}
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}
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holePositions = arrayRemoveDuplicates.arrayRemoveDuplicates(holePositions, Cartographic.Cartesian3.equalsEpsilon, true);
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if (holePositions.length < 3) {
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continue;
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}
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polygons.push(holePositions);
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var numGrandchildren = 0;
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if (when.defined(hole.holes)) {
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numGrandchildren = hole.holes.length;
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}
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for (j = 0; j < numGrandchildren; j++) {
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queue.enqueue(hole.holes[j]);
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}
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}
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polygons.push(outerRing);
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}
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return polygons;
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};
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PolygonGeometryLibrary.polygonsFromHierarchy = function(polygonHierarchy, projectPointsTo2D, scaleToEllipsoidSurface, ellipsoid) {
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// create from a polygon hierarchy
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// Algorithm adapted from http://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf
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var hierarchy = [];
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var polygons = [];
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var queue = new Queue();
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queue.enqueue(polygonHierarchy);
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while (queue.length !== 0) {
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var outerNode = queue.dequeue();
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var outerRing = outerNode.positions;
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var holes = outerNode.holes;
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var i;
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var length;
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if (scaleToEllipsoidSurface) {
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length = outerRing.length;
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for (i = 0; i < length; i++) {
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ellipsoid.scaleToGeodeticSurface(outerRing[i], outerRing[i]);
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}
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}
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outerRing = arrayRemoveDuplicates.arrayRemoveDuplicates(outerRing, Cartographic.Cartesian3.equalsEpsilon, true);
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if (outerRing.length < 3) {
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continue;
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}
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var positions2D = projectPointsTo2D(outerRing);
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if (!when.defined(positions2D)) {
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continue;
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}
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var holeIndices = [];
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var originalWindingOrder = PolygonPipeline.PolygonPipeline.computeWindingOrder2D(positions2D);
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if (originalWindingOrder === PolygonPipeline.WindingOrder.CLOCKWISE) {
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positions2D.reverse();
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outerRing = outerRing.slice().reverse();
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}
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var positions = outerRing.slice();
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var numChildren = when.defined(holes) ? holes.length : 0;
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var polygonHoles = [];
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var j;
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for (i = 0; i < numChildren; i++) {
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var hole = holes[i];
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var holePositions = hole.positions;
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if (scaleToEllipsoidSurface) {
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length = holePositions.length;
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for (j = 0; j < length; ++j) {
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ellipsoid.scaleToGeodeticSurface(holePositions[j], holePositions[j]);
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}
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}
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holePositions = arrayRemoveDuplicates.arrayRemoveDuplicates(holePositions, Cartographic.Cartesian3.equalsEpsilon, true);
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if (holePositions.length < 3) {
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continue;
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}
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var holePositions2D = projectPointsTo2D(holePositions);
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if (!when.defined(holePositions2D)) {
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continue;
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}
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originalWindingOrder = PolygonPipeline.PolygonPipeline.computeWindingOrder2D(holePositions2D);
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if (originalWindingOrder === PolygonPipeline.WindingOrder.CLOCKWISE) {
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holePositions2D.reverse();
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holePositions = holePositions.slice().reverse();
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}
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polygonHoles.push(holePositions);
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holeIndices.push(positions.length);
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positions = positions.concat(holePositions);
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positions2D = positions2D.concat(holePositions2D);
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var numGrandchildren = 0;
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if (when.defined(hole.holes)) {
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numGrandchildren = hole.holes.length;
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}
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for (j = 0; j < numGrandchildren; j++) {
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queue.enqueue(hole.holes[j]);
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}
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}
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hierarchy.push({
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outerRing : outerRing,
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holes : polygonHoles
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});
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polygons.push({
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positions : positions,
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positions2D : positions2D,
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holes : holeIndices
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});
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}
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return {
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hierarchy : hierarchy,
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polygons : polygons
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};
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};
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var computeBoundingRectangleCartesian2 = new Cartesian2.Cartesian2();
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var computeBoundingRectangleCartesian3 = new Cartographic.Cartesian3();
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var computeBoundingRectangleQuaternion = new Transforms.Quaternion();
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var computeBoundingRectangleMatrix3 = new BoundingSphere.Matrix3();
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PolygonGeometryLibrary.computeBoundingRectangle = function (planeNormal, projectPointTo2D, positions, angle, result) {
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var rotation = Transforms.Quaternion.fromAxisAngle(planeNormal, angle, computeBoundingRectangleQuaternion);
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var textureMatrix = BoundingSphere.Matrix3.fromQuaternion(rotation, computeBoundingRectangleMatrix3);
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var minX = Number.POSITIVE_INFINITY;
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var maxX = Number.NEGATIVE_INFINITY;
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var minY = Number.POSITIVE_INFINITY;
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var maxY = Number.NEGATIVE_INFINITY;
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var length = positions.length;
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for ( var i = 0; i < length; ++i) {
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var p = Cartographic.Cartesian3.clone(positions[i], computeBoundingRectangleCartesian3);
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BoundingSphere.Matrix3.multiplyByVector(textureMatrix, p, p);
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var st = projectPointTo2D(p, computeBoundingRectangleCartesian2);
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if (when.defined(st)) {
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minX = Math.min(minX, st.x);
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maxX = Math.max(maxX, st.x);
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minY = Math.min(minY, st.y);
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maxY = Math.max(maxY, st.y);
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}
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}
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result.x = minX;
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result.y = minY;
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result.width = maxX - minX;
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result.height = maxY - minY;
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return result;
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};
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PolygonGeometryLibrary.createGeometryFromPositions = function(ellipsoid, polygon, granularity, perPositionHeight, vertexFormat, arcType) {
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var indices = PolygonPipeline.PolygonPipeline.triangulate(polygon.positions2D, polygon.holes);
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/* If polygon is completely unrenderable, just use the first three vertices */
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if (indices.length < 3) {
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indices = [0, 1, 2];
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}
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var positions = polygon.positions;
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if (perPositionHeight) {
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var length = positions.length;
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var flattenedPositions = new Array(length * 3);
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var index = 0;
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for ( var i = 0; i < length; i++) {
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var p = positions[i];
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flattenedPositions[index++] = p.x;
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flattenedPositions[index++] = p.y;
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flattenedPositions[index++] = p.z;
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}
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var geometry = new GeometryAttribute.Geometry({
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attributes : {
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position : new GeometryAttribute.GeometryAttribute({
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componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
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componentsPerAttribute : 3,
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values : flattenedPositions
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})
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},
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indices : indices,
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primitiveType : PrimitiveType.PrimitiveType.TRIANGLES
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});
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if (vertexFormat.normal) {
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return GeometryPipeline.GeometryPipeline.computeNormal(geometry);
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}
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return geometry;
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}
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if (arcType === ArcType.ArcType.GEODESIC) {
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return PolygonPipeline.PolygonPipeline.computeSubdivision(ellipsoid, positions, indices, granularity);
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} else if (arcType === ArcType.ArcType.RHUMB) {
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return PolygonPipeline.PolygonPipeline.computeRhumbLineSubdivision(ellipsoid, positions, indices, granularity);
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}
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};
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var computeWallIndicesSubdivided = [];
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var p1Scratch = new Cartographic.Cartesian3();
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var p2Scratch = new Cartographic.Cartesian3();
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PolygonGeometryLibrary.computeWallGeometry = function(positions, ellipsoid, granularity, perPositionHeight, arcType) {
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var edgePositions;
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var topEdgeLength;
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var i;
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var p1;
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var p2;
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var length = positions.length;
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var index = 0;
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if (!perPositionHeight) {
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var minDistance = _Math.CesiumMath.chordLength(granularity, ellipsoid.maximumRadius);
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var numVertices = 0;
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if (arcType === ArcType.ArcType.GEODESIC) {
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for (i = 0; i < length; i++) {
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numVertices += PolygonGeometryLibrary.subdivideLineCount(positions[i], positions[(i + 1) % length], minDistance);
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}
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} else if (arcType === ArcType.ArcType.RHUMB) {
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for (i = 0; i < length; i++) {
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numVertices += PolygonGeometryLibrary.subdivideRhumbLineCount(ellipsoid, positions[i], positions[(i + 1) % length], minDistance);
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}
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}
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topEdgeLength = (numVertices + length) * 3;
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edgePositions = new Array(topEdgeLength * 2);
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for (i = 0; i < length; i++) {
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p1 = positions[i];
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p2 = positions[(i + 1) % length];
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var tempPositions;
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if (arcType === ArcType.ArcType.GEODESIC) {
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tempPositions = PolygonGeometryLibrary.subdivideLine(p1, p2, minDistance, computeWallIndicesSubdivided);
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} else if (arcType === ArcType.ArcType.RHUMB) {
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tempPositions = PolygonGeometryLibrary.subdivideRhumbLine(ellipsoid, p1, p2, minDistance, computeWallIndicesSubdivided);
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}
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var tempPositionsLength = tempPositions.length;
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for (var j = 0; j < tempPositionsLength; ++j, ++index) {
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edgePositions[index] = tempPositions[j];
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edgePositions[index + topEdgeLength] = tempPositions[j];
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}
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edgePositions[index] = p2.x;
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edgePositions[index + topEdgeLength] = p2.x;
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++index;
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edgePositions[index] = p2.y;
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edgePositions[index + topEdgeLength] = p2.y;
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++index;
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edgePositions[index] = p2.z;
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edgePositions[index + topEdgeLength] = p2.z;
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++index;
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}
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} else {
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topEdgeLength = length * 3 * 2;
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edgePositions = new Array(topEdgeLength * 2);
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for (i = 0; i < length; i++) {
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p1 = positions[i];
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p2 = positions[(i + 1) % length];
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edgePositions[index] = edgePositions[index + topEdgeLength] = p1.x;
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++index;
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edgePositions[index] = edgePositions[index + topEdgeLength] = p1.y;
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++index;
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edgePositions[index] = edgePositions[index + topEdgeLength] = p1.z;
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++index;
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edgePositions[index] = edgePositions[index + topEdgeLength] = p2.x;
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++index;
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edgePositions[index] = edgePositions[index + topEdgeLength] = p2.y;
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++index;
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edgePositions[index] = edgePositions[index + topEdgeLength] = p2.z;
|
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++index;
|
|
}
|
|
}
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length = edgePositions.length;
|
|
var indices = IndexDatatype.IndexDatatype.createTypedArray(length / 3, length - positions.length * 6);
|
|
var edgeIndex = 0;
|
|
length /= 6;
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|
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for (i = 0; i < length; i++) {
|
|
var UL = i;
|
|
var UR = UL + 1;
|
|
var LL = UL + length;
|
|
var LR = LL + 1;
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p1 = Cartographic.Cartesian3.fromArray(edgePositions, UL * 3, p1Scratch);
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p2 = Cartographic.Cartesian3.fromArray(edgePositions, UR * 3, p2Scratch);
|
|
if (Cartographic.Cartesian3.equalsEpsilon(p1, p2, _Math.CesiumMath.EPSILON14)) {
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continue;
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}
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|
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indices[edgeIndex++] = UL;
|
|
indices[edgeIndex++] = LL;
|
|
indices[edgeIndex++] = UR;
|
|
indices[edgeIndex++] = UR;
|
|
indices[edgeIndex++] = LL;
|
|
indices[edgeIndex++] = LR;
|
|
}
|
|
|
|
return new GeometryAttribute.Geometry({
|
|
attributes : new GeometryAttributes.GeometryAttributes({
|
|
position : new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
|
|
componentsPerAttribute : 3,
|
|
values : edgePositions
|
|
})
|
|
}),
|
|
indices : indices,
|
|
primitiveType : PrimitiveType.PrimitiveType.TRIANGLES
|
|
});
|
|
};
|
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|
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exports.PolygonGeometryLibrary = PolygonGeometryLibrary;
|
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|
|
});
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