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exportKml.js
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exportKml.js
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import Cartesian2 from "../Core/Cartesian2.js";
import Cartesian3 from "../Core/Cartesian3.js";
import Cartographic from "../Core/Cartographic.js";
import Color from "../Core/Color.js";
import createGuid from "../Core/createGuid.js";
import defaultValue from "../Core/defaultValue.js";
import defined from "../Core/defined.js";
import DeveloperError from "../Core/DeveloperError.js";
import Ellipsoid from "../Core/Ellipsoid.js";
import Iso8601 from "../Core/Iso8601.js";
import JulianDate from "../Core/JulianDate.js";
import CesiumMath from "../Core/Math.js";
import Rectangle from "../Core/Rectangle.js";
import ReferenceFrame from "../Core/ReferenceFrame.js";
import Resource from "../Core/Resource.js";
import RuntimeError from "../Core/RuntimeError.js";
import TimeInterval from "../Core/TimeInterval.js";
import TimeIntervalCollection from "../Core/TimeIntervalCollection.js";
import HeightReference from "../Scene/HeightReference.js";
import HorizontalOrigin from "../Scene/HorizontalOrigin.js";
import VerticalOrigin from "../Scene/VerticalOrigin.js";
import when from "../ThirdParty/when.js";
import zip from "../ThirdParty/zip.js";
import BillboardGraphics from "./BillboardGraphics.js";
import CompositePositionProperty from "./CompositePositionProperty.js";
import ModelGraphics from "./ModelGraphics.js";
import RectangleGraphics from "./RectangleGraphics.js";
import SampledPositionProperty from "./SampledPositionProperty.js";
import SampledProperty from "./SampledProperty.js";
import ScaledPositionProperty from "./ScaledPositionProperty.js";
var BILLBOARD_SIZE = 32;
var kmlNamespace = "http://www.opengis.net/kml/2.2";
var gxNamespace = "http://www.google.com/kml/ext/2.2";
var xmlnsNamespace = "http://www.w3.org/2000/xmlns/";
//
// Handles files external to the KML (eg. textures and models)
//
function ExternalFileHandler(modelCallback) {
this._files = {};
this._promises = [];
this._count = 0;
this._modelCallback = modelCallback;
}
var imageTypeRegex = /^data:image\/([^,;]+)/;
ExternalFileHandler.prototype.texture = function (texture) {
var that = this;
var filename;
if (typeof texture === "string" || texture instanceof Resource) {
texture = Resource.createIfNeeded(texture);
if (!texture.isDataUri) {
return texture.url;
}
// If its a data URI try and get the correct extension and then fetch the blob
var regexResult = texture.url.match(imageTypeRegex);
filename = "texture_" + ++this._count;
if (defined(regexResult)) {
filename += "." + regexResult[1];
}
var promise = texture.fetchBlob().then(function (blob) {
that._files[filename] = blob;
});
this._promises.push(promise);
return filename;
}
if (texture instanceof HTMLCanvasElement) {
var deferred = when.defer();
this._promises.push(deferred.promise);
filename = "texture_" + ++this._count + ".png";
texture.toBlob(function (blob) {
that._files[filename] = blob;
deferred.resolve();
});
return filename;
}
return "";
};
function getModelBlobHander(that, filename) {
return function (blob) {
that._files[filename] = blob;
};
}
ExternalFileHandler.prototype.model = function (model, time) {
var modelCallback = this._modelCallback;
if (!defined(modelCallback)) {
throw new RuntimeError(
"Encountered a model entity while exporting to KML, but no model callback was supplied."
);
}
var externalFiles = {};
var url = modelCallback(model, time, externalFiles);
// Iterate through external files and add them to our list once the promise resolves
for (var filename in externalFiles) {
if (externalFiles.hasOwnProperty(filename)) {
var promise = when(externalFiles[filename]);
this._promises.push(promise);
promise.then(getModelBlobHander(this, filename));
}
}
return url;
};
Object.defineProperties(ExternalFileHandler.prototype, {
promise: {
get: function () {
return when.all(this._promises);
},
},
files: {
get: function () {
return this._files;
},
},
});
//
// Handles getting values from properties taking the desired time and default values into account
//
function ValueGetter(time) {
this._time = time;
}
ValueGetter.prototype.get = function (property, defaultVal, result) {
var value;
if (defined(property)) {
value = defined(property.getValue)
? property.getValue(this._time, result)
: property;
}
return defaultValue(value, defaultVal);
};
ValueGetter.prototype.getColor = function (property, defaultVal) {
var result = this.get(property, defaultVal);
if (defined(result)) {
return colorToString(result);
}
};
ValueGetter.prototype.getMaterialType = function (property) {
if (!defined(property)) {
return;
}
return property.getType(this._time);
};
//
// Caches styles so we don't generate a ton of duplicate styles
//
function StyleCache() {
this._ids = {};
this._styles = {};
this._count = 0;
}
StyleCache.prototype.get = function (element) {
var ids = this._ids;
var key = element.innerHTML;
if (defined(ids[key])) {
return ids[key];
}
var styleId = "style-" + ++this._count;
element.setAttribute("id", styleId);
// Store with #
styleId = "#" + styleId;
ids[key] = styleId;
this._styles[key] = element;
return styleId;
};
StyleCache.prototype.save = function (parentElement) {
var styles = this._styles;
var firstElement = parentElement.childNodes[0];
for (var key in styles) {
if (styles.hasOwnProperty(key)) {
parentElement.insertBefore(styles[key], firstElement);
}
}
};
//
// Manages the generation of IDs because an entity may have geometry and a Folder for children
//
function IdManager() {
this._ids = {};
}
IdManager.prototype.get = function (id) {
if (!defined(id)) {
return this.get(createGuid());
}
var ids = this._ids;
if (!defined(ids[id])) {
ids[id] = 0;
return id;
}
return id.toString() + "-" + ++ids[id];
};
/**
* @typedef exportKmlResultKml
* @type {Object}
* @property {String} kml The generated KML.
* @property {Object.<string, Blob>} externalFiles An object dictionary of external files
*/
/**
* @typedef exportKmlResultKmz
* @type {Object}
* @property {Blob} kmz The generated kmz file.
*/
/**
* Exports an EntityCollection as a KML document. Only Point, Billboard, Model, Path, Polygon, Polyline geometries
* will be exported. Note that there is not a 1 to 1 mapping of Entity properties to KML Feature properties. For
* example, entity properties that are time dynamic but cannot be dynamic in KML are exported with their values at
* options.time or the beginning of the EntityCollection's time interval if not specified. For time-dynamic properties
* that are supported in KML, we use the samples if it is a {@link SampledProperty} otherwise we sample the value using
* the options.sampleDuration. Point, Billboard, Model and Path geometries with time-dynamic positions will be exported
* as gx:Track Features. Not all Materials are representable in KML, so for more advanced Materials just the primary
* color is used. Canvas objects are exported as PNG images.
*
* @function exportKml
*
* @param {Object} options An object with the following properties:
* @param {EntityCollection} options.entities The EntityCollection to export as KML.
* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid for the output file.
* @param {exportKmlModelCallback} [options.modelCallback] A callback that will be called with a {@link ModelGraphics} instance and should return the URI to use in the KML. Required if a model exists in the entity collection.
* @param {JulianDate} [options.time=entities.computeAvailability().start] The time value to use to get properties that are not time varying in KML.
* @param {TimeInterval} [options.defaultAvailability=entities.computeAvailability()] The interval that will be sampled if an entity doesn't have an availability.
* @param {Number} [options.sampleDuration=60] The number of seconds to sample properties that are varying in KML.
* @param {Boolean} [options.kmz=false] If true KML and external files will be compressed into a kmz file.
*
* @returns {Promise<exportKmlResultKml|exportKmlResultKmz>} A promise that resolved to an object containing the KML string and a dictionary of external file blobs, or a kmz file as a blob if options.kmz is true.
* @demo {@link https://sandcastle.cesium.com/index.html?src=Export%20KML.html|Cesium Sandcastle KML Export Demo}
* @example
* Cesium.exportKml({
* entities: entityCollection
* })
* .then(function(result) {
* // The XML string is in result.kml
*
* var externalFiles = result.externalFiles
* for(var file in externalFiles) {
* // file is the name of the file used in the KML document as the href
* // externalFiles[file] is a blob with the contents of the file
* }
* });
*
*/
function exportKml(options) {
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
var entities = options.entities;
var kmz = defaultValue(options.kmz, false);
//>>includeStart('debug', pragmas.debug);
if (!defined(entities)) {
throw new DeveloperError("entities is required.");
}
//>>includeEnd('debug');
// Get the state that is passed around during the recursion
// This is separated out for testing.
var state = exportKml._createState(options);
// Filter EntityCollection so we only have top level entities
var rootEntities = entities.values.filter(function (entity) {
return !defined(entity.parent);
});
// Add the <Document>
var kmlDoc = state.kmlDoc;
var kmlElement = kmlDoc.documentElement;
kmlElement.setAttributeNS(xmlnsNamespace, "xmlns:gx", gxNamespace);
var kmlDocumentElement = kmlDoc.createElement("Document");
kmlElement.appendChild(kmlDocumentElement);
// Create the KML Hierarchy
recurseEntities(state, kmlDocumentElement, rootEntities);
// Write out the <Style> elements
state.styleCache.save(kmlDocumentElement);
// Once all the blobs have resolved return the KML string along with the blob collection
var externalFileHandler = state.externalFileHandler;
return externalFileHandler.promise.then(function () {
var serializer = new XMLSerializer();
var kmlString = serializer.serializeToString(state.kmlDoc);
if (kmz) {
return createKmz(kmlString, externalFileHandler.files);
}
return {
kml: kmlString,
externalFiles: externalFileHandler.files,
};
});
}
function createKmz(kmlString, externalFiles) {
var deferred = when.defer();
zip.createWriter(new zip.BlobWriter(), function (writer) {
// We need to only write one file at a time so the zip doesn't get corrupted
addKmlToZip(writer, kmlString)
.then(function () {
var keys = Object.keys(externalFiles);
return addExternalFilesToZip(writer, keys, externalFiles, 0);
})
.then(function () {
writer.close(function (blob) {
deferred.resolve({
kmz: blob,
});
});
});
});
return deferred.promise;
}
function addKmlToZip(writer, kmlString) {
var deferred = when.defer();
writer.add("doc.kml", new zip.TextReader(kmlString), function () {
deferred.resolve();
});
return deferred.promise;
}
function addExternalFilesToZip(writer, keys, externalFiles, index) {
if (keys.length === index) {
return;
}
var filename = keys[index];
var deferred = when.defer();
writer.add(
filename,
new zip.BlobReader(externalFiles[filename]),
function () {
deferred.resolve();
}
);
return deferred.promise.then(function () {
return addExternalFilesToZip(writer, keys, externalFiles, index + 1);
});
}
exportKml._createState = function (options) {
var entities = options.entities;
var styleCache = new StyleCache();
// Use the start time as the default because just in case they define
// properties with an interval even if they don't change.
var entityAvailability = entities.computeAvailability();
var time = defined(options.time) ? options.time : entityAvailability.start;
// Figure out how we will sample dynamic position properties
var defaultAvailability = defaultValue(
options.defaultAvailability,
entityAvailability
);
var sampleDuration = defaultValue(options.sampleDuration, 60);
// Make sure we don't have infinite availability if we need to sample
if (defaultAvailability.start === Iso8601.MINIMUM_VALUE) {
if (defaultAvailability.stop === Iso8601.MAXIMUM_VALUE) {
// Infinite, so just use the default
defaultAvailability = new TimeInterval();
} else {
// No start time, so just sample 10 times before the stop
JulianDate.addSeconds(
defaultAvailability.stop,
-10 * sampleDuration,
defaultAvailability.start
);
}
} else if (defaultAvailability.stop === Iso8601.MAXIMUM_VALUE) {
// No stop time, so just sample 10 times after the start
JulianDate.addSeconds(
defaultAvailability.start,
10 * sampleDuration,
defaultAvailability.stop
);
}
var externalFileHandler = new ExternalFileHandler(options.modelCallback);
var kmlDoc = document.implementation.createDocument(kmlNamespace, "kml");
return {
kmlDoc: kmlDoc,
ellipsoid: defaultValue(options.ellipsoid, Ellipsoid.WGS84),
idManager: new IdManager(),
styleCache: styleCache,
externalFileHandler: externalFileHandler,
time: time,
valueGetter: new ValueGetter(time),
sampleDuration: sampleDuration,
// Wrap it in a TimeIntervalCollection because that is what entity.availability is
defaultAvailability: new TimeIntervalCollection([defaultAvailability]),
};
};
function recurseEntities(state, parentNode, entities) {
var kmlDoc = state.kmlDoc;
var styleCache = state.styleCache;
var valueGetter = state.valueGetter;
var idManager = state.idManager;
var count = entities.length;
var overlays;
var geometries;
var styles;
for (var i = 0; i < count; ++i) {
var entity = entities[i];
overlays = [];
geometries = [];
styles = [];
createPoint(state, entity, geometries, styles);
createLineString(state, entity.polyline, geometries, styles);
createPolygon(state, entity.rectangle, geometries, styles, overlays);
createPolygon(state, entity.polygon, geometries, styles, overlays);
createModel(state, entity, entity.model, geometries, styles);
var timeSpan;
var availability = entity.availability;
if (defined(availability)) {
timeSpan = kmlDoc.createElement("TimeSpan");
if (!JulianDate.equals(availability.start, Iso8601.MINIMUM_VALUE)) {
timeSpan.appendChild(
createBasicElementWithText(
kmlDoc,
"begin",
JulianDate.toIso8601(availability.start)
)
);
}
if (!JulianDate.equals(availability.stop, Iso8601.MAXIMUM_VALUE)) {
timeSpan.appendChild(
createBasicElementWithText(
kmlDoc,
"end",
JulianDate.toIso8601(availability.stop)
)
);
}
}
for (var overlayIndex = 0; overlayIndex < overlays.length; ++overlayIndex) {
var overlay = overlays[overlayIndex];
overlay.setAttribute("id", idManager.get(entity.id));
overlay.appendChild(
createBasicElementWithText(kmlDoc, "name", entity.name)
);
overlay.appendChild(
createBasicElementWithText(kmlDoc, "visibility", entity.show)
);
overlay.appendChild(
createBasicElementWithText(kmlDoc, "description", entity.description)
);
if (defined(timeSpan)) {
overlay.appendChild(timeSpan);
}
parentNode.appendChild(overlay);
}
var geometryCount = geometries.length;
if (geometryCount > 0) {
var placemark = kmlDoc.createElement("Placemark");
placemark.setAttribute("id", idManager.get(entity.id));
var name = entity.name;
var labelGraphics = entity.label;
if (defined(labelGraphics)) {
var labelStyle = kmlDoc.createElement("LabelStyle");
// KML only shows the name as a label, so just change the name if we need to show a label
var text = valueGetter.get(labelGraphics.text);
name = defined(text) && text.length > 0 ? text : name;
var color = valueGetter.getColor(labelGraphics.fillColor);
if (defined(color)) {
labelStyle.appendChild(
createBasicElementWithText(kmlDoc, "color", color)
);
labelStyle.appendChild(
createBasicElementWithText(kmlDoc, "colorMode", "normal")
);
}
var scale = valueGetter.get(labelGraphics.scale);
if (defined(scale)) {
labelStyle.appendChild(
createBasicElementWithText(kmlDoc, "scale", scale)
);
}
styles.push(labelStyle);
}
placemark.appendChild(createBasicElementWithText(kmlDoc, "name", name));
placemark.appendChild(
createBasicElementWithText(kmlDoc, "visibility", entity.show)
);
placemark.appendChild(
createBasicElementWithText(kmlDoc, "description", entity.description)
);
if (defined(timeSpan)) {
placemark.appendChild(timeSpan);
}
parentNode.appendChild(placemark);
var styleCount = styles.length;
if (styleCount > 0) {
var style = kmlDoc.createElement("Style");
for (var styleIndex = 0; styleIndex < styleCount; ++styleIndex) {
style.appendChild(styles[styleIndex]);
}
placemark.appendChild(
createBasicElementWithText(kmlDoc, "styleUrl", styleCache.get(style))
);
}
if (geometries.length === 1) {
placemark.appendChild(geometries[0]);
} else if (geometries.length > 1) {
var multigeometry = kmlDoc.createElement("MultiGeometry");
for (
var geometryIndex = 0;
geometryIndex < geometryCount;
++geometryIndex
) {
multigeometry.appendChild(geometries[geometryIndex]);
}
placemark.appendChild(multigeometry);
}
}
var children = entity._children;
if (children.length > 0) {
var folderNode = kmlDoc.createElement("Folder");
folderNode.setAttribute("id", idManager.get(entity.id));
folderNode.appendChild(
createBasicElementWithText(kmlDoc, "name", entity.name)
);
folderNode.appendChild(
createBasicElementWithText(kmlDoc, "visibility", entity.show)
);
folderNode.appendChild(
createBasicElementWithText(kmlDoc, "description", entity.description)
);
parentNode.appendChild(folderNode);
recurseEntities(state, folderNode, children);
}
}
}
var scratchCartesian3 = new Cartesian3();
var scratchCartographic = new Cartographic();
var scratchJulianDate = new JulianDate();
function createPoint(state, entity, geometries, styles) {
var kmlDoc = state.kmlDoc;
var ellipsoid = state.ellipsoid;
var valueGetter = state.valueGetter;
var pointGraphics = defaultValue(entity.billboard, entity.point);
if (!defined(pointGraphics) && !defined(entity.path)) {
return;
}
// If the point isn't constant then create gx:Track or gx:MultiTrack
var entityPositionProperty = entity.position;
if (!entityPositionProperty.isConstant) {
createTracks(state, entity, pointGraphics, geometries, styles);
return;
}
valueGetter.get(entityPositionProperty, undefined, scratchCartesian3);
var coordinates = createBasicElementWithText(
kmlDoc,
"coordinates",
getCoordinates(scratchCartesian3, ellipsoid)
);
var pointGeometry = kmlDoc.createElement("Point");
// Set altitude mode
var altitudeMode = kmlDoc.createElement("altitudeMode");
altitudeMode.appendChild(
getAltitudeMode(state, pointGraphics.heightReference)
);
pointGeometry.appendChild(altitudeMode);
pointGeometry.appendChild(coordinates);
geometries.push(pointGeometry);
// Create style
var iconStyle =
pointGraphics instanceof BillboardGraphics
? createIconStyleFromBillboard(state, pointGraphics)
: createIconStyleFromPoint(state, pointGraphics);
styles.push(iconStyle);
}
function createTracks(state, entity, pointGraphics, geometries, styles) {
var kmlDoc = state.kmlDoc;
var ellipsoid = state.ellipsoid;
var valueGetter = state.valueGetter;
var intervals;
var entityPositionProperty = entity.position;
var useEntityPositionProperty = true;
if (entityPositionProperty instanceof CompositePositionProperty) {
intervals = entityPositionProperty.intervals;
useEntityPositionProperty = false;
} else {
intervals = defaultValue(entity.availability, state.defaultAvailability);
}
var isModel = pointGraphics instanceof ModelGraphics;
var i, j, times;
var tracks = [];
for (i = 0; i < intervals.length; ++i) {
var interval = intervals.get(i);
var positionProperty = useEntityPositionProperty
? entityPositionProperty
: interval.data;
var trackAltitudeMode = kmlDoc.createElement("altitudeMode");
// This is something that KML importing uses to handle clampToGround,
// so just extract the internal property and set the altitudeMode.
if (positionProperty instanceof ScaledPositionProperty) {
positionProperty = positionProperty._value;
trackAltitudeMode.appendChild(
getAltitudeMode(state, HeightReference.CLAMP_TO_GROUND)
);
} else if (defined(pointGraphics)) {
trackAltitudeMode.appendChild(
getAltitudeMode(state, pointGraphics.heightReference)
);
} else {
// Path graphics only, which has no height reference
trackAltitudeMode.appendChild(
getAltitudeMode(state, HeightReference.NONE)
);
}
var positionTimes = [];
var positionValues = [];
if (positionProperty.isConstant) {
valueGetter.get(positionProperty, undefined, scratchCartesian3);
var constCoordinates = createBasicElementWithText(
kmlDoc,
"coordinates",
getCoordinates(scratchCartesian3, ellipsoid)
);
// This interval is constant so add a track with the same position
positionTimes.push(JulianDate.toIso8601(interval.start));
positionValues.push(constCoordinates);
positionTimes.push(JulianDate.toIso8601(interval.stop));
positionValues.push(constCoordinates);
} else if (positionProperty instanceof SampledPositionProperty) {
times = positionProperty._property._times;
for (j = 0; j < times.length; ++j) {
positionTimes.push(JulianDate.toIso8601(times[j]));
positionProperty.getValueInReferenceFrame(
times[j],
ReferenceFrame.FIXED,
scratchCartesian3
);
positionValues.push(getCoordinates(scratchCartesian3, ellipsoid));
}
} else if (positionProperty instanceof SampledProperty) {
times = positionProperty._times;
var values = positionProperty._values;
for (j = 0; j < times.length; ++j) {
positionTimes.push(JulianDate.toIso8601(times[j]));
Cartesian3.fromArray(values, j * 3, scratchCartesian3);
positionValues.push(getCoordinates(scratchCartesian3, ellipsoid));
}
} else {
var duration = state.sampleDuration;
interval.start.clone(scratchJulianDate);
if (!interval.isStartIncluded) {
JulianDate.addSeconds(scratchJulianDate, duration, scratchJulianDate);
}
var stopDate = interval.stop;
while (JulianDate.lessThan(scratchJulianDate, stopDate)) {
positionProperty.getValue(scratchJulianDate, scratchCartesian3);
positionTimes.push(JulianDate.toIso8601(scratchJulianDate));
positionValues.push(getCoordinates(scratchCartesian3, ellipsoid));
JulianDate.addSeconds(scratchJulianDate, duration, scratchJulianDate);
}
if (
interval.isStopIncluded &&
JulianDate.equals(scratchJulianDate, stopDate)
) {
positionProperty.getValue(scratchJulianDate, scratchCartesian3);
positionTimes.push(JulianDate.toIso8601(scratchJulianDate));
positionValues.push(getCoordinates(scratchCartesian3, ellipsoid));
}
}
var trackGeometry = kmlDoc.createElementNS(gxNamespace, "Track");
trackGeometry.appendChild(trackAltitudeMode);
for (var k = 0; k < positionTimes.length; ++k) {
var when = createBasicElementWithText(kmlDoc, "when", positionTimes[k]);
var coord = createBasicElementWithText(
kmlDoc,
"coord",
positionValues[k],
gxNamespace
);
trackGeometry.appendChild(when);
trackGeometry.appendChild(coord);
}
if (isModel) {
trackGeometry.appendChild(createModelGeometry(state, pointGraphics));
}
tracks.push(trackGeometry);
}
// If one track, then use it otherwise combine into a multitrack
if (tracks.length === 1) {
geometries.push(tracks[0]);
} else if (tracks.length > 1) {
var multiTrackGeometry = kmlDoc.createElementNS(gxNamespace, "MultiTrack");
for (i = 0; i < tracks.length; ++i) {
multiTrackGeometry.appendChild(tracks[i]);
}
geometries.push(multiTrackGeometry);
}
// Create style
if (defined(pointGraphics) && !isModel) {
var iconStyle =
pointGraphics instanceof BillboardGraphics
? createIconStyleFromBillboard(state, pointGraphics)
: createIconStyleFromPoint(state, pointGraphics);
styles.push(iconStyle);
}
// See if we have a line that needs to be drawn
var path = entity.path;
if (defined(path)) {
var width = valueGetter.get(path.width);
var material = path.material;
if (defined(material) || defined(width)) {
var lineStyle = kmlDoc.createElement("LineStyle");
if (defined(width)) {
lineStyle.appendChild(
createBasicElementWithText(kmlDoc, "width", width)
);
}
processMaterial(state, material, lineStyle);
styles.push(lineStyle);
}
}
}
function createIconStyleFromPoint(state, pointGraphics) {
var kmlDoc = state.kmlDoc;
var valueGetter = state.valueGetter;
var iconStyle = kmlDoc.createElement("IconStyle");
var color = valueGetter.getColor(pointGraphics.color);
if (defined(color)) {
iconStyle.appendChild(createBasicElementWithText(kmlDoc, "color", color));
iconStyle.appendChild(
createBasicElementWithText(kmlDoc, "colorMode", "normal")
);
}
var pixelSize = valueGetter.get(pointGraphics.pixelSize);
if (defined(pixelSize)) {
iconStyle.appendChild(
createBasicElementWithText(kmlDoc, "scale", pixelSize / BILLBOARD_SIZE)
);
}
return iconStyle;
}
function createIconStyleFromBillboard(state, billboardGraphics) {
var kmlDoc = state.kmlDoc;
var valueGetter = state.valueGetter;
var externalFileHandler = state.externalFileHandler;
var iconStyle = kmlDoc.createElement("IconStyle");
var image = valueGetter.get(billboardGraphics.image);
if (defined(image)) {
image = externalFileHandler.texture(image);
var icon = kmlDoc.createElement("Icon");
icon.appendChild(createBasicElementWithText(kmlDoc, "href", image));
var imageSubRegion = valueGetter.get(billboardGraphics.imageSubRegion);
if (defined(imageSubRegion)) {
icon.appendChild(
createBasicElementWithText(kmlDoc, "x", imageSubRegion.x, gxNamespace)
);
icon.appendChild(
createBasicElementWithText(kmlDoc, "y", imageSubRegion.y, gxNamespace)
);
icon.appendChild(
createBasicElementWithText(
kmlDoc,
"w",
imageSubRegion.width,
gxNamespace
)
);
icon.appendChild(
createBasicElementWithText(
kmlDoc,
"h",
imageSubRegion.height,
gxNamespace
)
);
}
iconStyle.appendChild(icon);
}
var color = valueGetter.getColor(billboardGraphics.color);
if (defined(color)) {
iconStyle.appendChild(createBasicElementWithText(kmlDoc, "color", color));
iconStyle.appendChild(
createBasicElementWithText(kmlDoc, "colorMode", "normal")
);
}
var scale = valueGetter.get(billboardGraphics.scale);
if (defined(scale)) {
iconStyle.appendChild(createBasicElementWithText(kmlDoc, "scale", scale));
}
var pixelOffset = valueGetter.get(billboardGraphics.pixelOffset);
if (defined(pixelOffset)) {
scale = defaultValue(scale, 1.0);
Cartesian2.divideByScalar(pixelOffset, scale, pixelOffset);
var width = valueGetter.get(billboardGraphics.width, BILLBOARD_SIZE);
var height = valueGetter.get(billboardGraphics.height, BILLBOARD_SIZE);
// KML Hotspots are from the bottom left, but we work from the top left
// Move to left
var horizontalOrigin = valueGetter.get(
billboardGraphics.horizontalOrigin,
HorizontalOrigin.CENTER
);
if (horizontalOrigin === HorizontalOrigin.CENTER) {
pixelOffset.x -= width * 0.5;
} else if (horizontalOrigin === HorizontalOrigin.RIGHT) {
pixelOffset.x -= width;
}
// Move to bottom
var verticalOrigin = valueGetter.get(
billboardGraphics.verticalOrigin,
VerticalOrigin.CENTER
);
if (verticalOrigin === VerticalOrigin.TOP) {
pixelOffset.y += height;
} else if (verticalOrigin === VerticalOrigin.CENTER) {
pixelOffset.y += height * 0.5;
}
var hotSpot = kmlDoc.createElement("hotSpot");
hotSpot.setAttribute("x", -pixelOffset.x);
hotSpot.setAttribute("y", pixelOffset.y);
hotSpot.setAttribute("xunits", "pixels");
hotSpot.setAttribute("yunits", "pixels");
iconStyle.appendChild(hotSpot);
}
// We can only specify heading so if axis isn't Z, then we skip the rotation
// GE treats a heading of zero as no heading but can still point north using a 360 degree angle
var rotation = valueGetter.get(billboardGraphics.rotation);
var alignedAxis = valueGetter.get(billboardGraphics.alignedAxis);
if (defined(rotation) && Cartesian3.equals(Cartesian3.UNIT_Z, alignedAxis)) {
rotation = CesiumMath.toDegrees(-rotation);
if (rotation === 0) {
rotation = 360;
}
iconStyle.appendChild(
createBasicElementWithText(kmlDoc, "heading", rotation)
);
}
return iconStyle;
}
function createLineString(state, polylineGraphics, geometries, styles) {
var kmlDoc = state.kmlDoc;
var ellipsoid = state.ellipsoid;
var valueGetter = state.valueGetter;
if (!defined(polylineGraphics)) {
return;
}
var lineStringGeometry = kmlDoc.createElement("LineString");
// Set altitude mode
var altitudeMode = kmlDoc.createElement("altitudeMode");
var clampToGround = valueGetter.get(polylineGraphics.clampToGround, false);
var altitudeModeText;
if (clampToGround) {
lineStringGeometry.appendChild(
createBasicElementWithText(kmlDoc, "tessellate", true)
);
altitudeModeText = kmlDoc.createTextNode("clampToGround");
} else {
altitudeModeText = kmlDoc.createTextNode("absolute");
}
altitudeMode.appendChild(altitudeModeText);
lineStringGeometry.appendChild(altitudeMode);
// Set coordinates
var positionsProperty = polylineGraphics.positions;
var cartesians = valueGetter.get(positionsProperty);
var coordinates = createBasicElementWithText(
kmlDoc,
"coordinates",
getCoordinates(cartesians, ellipsoid)
);
lineStringGeometry.appendChild(coordinates);
// Set draw order
var zIndex = valueGetter.get(polylineGraphics.zIndex);
if (clampToGround && defined(zIndex)) {
lineStringGeometry.appendChild(
createBasicElementWithText(kmlDoc, "drawOrder", zIndex, gxNamespace)
);
}