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cesium-city3d
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cesium-city3d/examples/js/saveKml.js

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JavaScript
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var ModelCache = {};
function createModelNode(Cesium,entity){
var model = entity.model;
var modelNode;
if(model){
var position = entity.position;
var locationNode;
if(position instanceof Cesium.SampledPositionProperty){
var data = position._property;
var times = [];
var values = data._values;
var points = [];
var len = data._times.length;
var j = 0;
var i = 0;
while(j < len){
points.push(new Cesium.Cartesian3(values[i],values[i+1],values[i+2]));
var time = data._times[j];
times[j] = Cesium.JulianDate.toIso8601(time);
j++;
i = i + 3;
}
var trackNodes = [];
for(var i = 0,j = times.length;i < j;i++){
var coord = Cesium.Cartographic.fromCartesian(points[i]);
var lon = Cesium.Math.toDegrees(coord.longitude);
var lat = Cesium.Math.toDegrees(coord.latitude);
var height = coord.height
var coordStr = lon + ' ' + lat + ' ' + height;
var coordNode = createNode('gx:coord',coordStr);
var whenNode = createNode('when',times[i]);
trackNodes.push(whenNode);
trackNodes.push(coordNode);
}
var trackNode = addNodes('gx:Track',trackNodes);
var altitudeModeNode = createNode('altitudeMode','absolute');
var interpolateNode = createNode('gx:interpolate','1');
var multiTrackNode = addNodes('gx:MultiTrack',[altitudeModeNode,interpolateNode,trackNode]);
var styleUrlNode = createNode('styleUrl','#' + entity.id);
var descriptionNode = createNode('description','<![CDATA[BIKE RIDE]]>');
var nameNode = createNode('name','<![CDATA[bcj]]>');
locationNode = addNode('Location',multiTrackNode);
}
else{
var longitudeNode = createNode('longitude',0);
var latitudeNode = createNode('latitude',0);
var altitudeNode = createNode('altitude',0);
locationNode = addNodes('Location',[longitudeNode,latitudeNode,altitudeNode]);
}
var docUri = new Cesium.Uri(document.location.href);
var modelUri = new Cesium.Uri(model._uri._value);
var baseUri = modelUri.resolve(docUri).toString();
var hrefNode = createNode('href',baseUri);
var linkNode = addNode('Link',hrefNode);
var xScaleNode = createNode('x',1);
var yScaleNode = createNode('y',1);
var zScaleNode = createNode('z',1);
var scaleNode = addNodes('Scale',[xScaleNode,yScaleNode,zScaleNode]);
var headingNode = createNode('heading',270);
var tiltNode = createNode('tilt',0);
var rollNode = createNode('roll',0);
var orientationNode = addNodes('Orientation',[headingNode,tiltNode,rollNode]);
var altitudeModeNode = createNode('altitudeMode','relativeToGround');
modelNode = addNodes('Model',[locationNode,orientationNode,scaleNode,linkNode]);
}
return modelNode;
}
function createStyleNode(entity){
var billboard = entity.billboard;
var styleNode;
if(billboard){
var img = billboard.image;
var hrefNode;
if(img){
var href = img._value;
var hrefNode = createNode('href',href);
var iconNode = addNode('Icon',hrefNode);
var scaleNode;
if(billboard.scale){
var scale = billboard.scale._value;
scaleNode = createNode('scale',scale);
}
else{
scaleNode = createNode('scale',1);
}
var pixelOffset = billboard.pixelOffset;
var hotSpotNode;
if(pixelOffset){
var x = pixelOffset._value.x;
x = -1*(x - billboard.width*0.5*scale);
var y = pixelOffset._value.y;
y = y + billboard.height*0.5*scale;
var obj = {
x : x,
y : y,
xunits : 'pixels',
yunits : 'pixels'
};
hotSpotNode = addOnlyAttrNode('hotSpot',obj);
}
var iconStyleNode = addNodes('IconStyle',[scaleNode,iconNode,hotSpotNode])
var path = entity.path;
var lineStyleNode;
if(path){
var color = path.material.color._value;
color = 'ff0000ff';
var width = path.width._value;
var colorNode = createNode('color',color);
var widthNode = createNode('width',width);
lineStyleNode = addNodes('LineStyle',[colorNode,widthNode]);
}
styleNode = addNodes('Style',[iconStyleNode,lineStyleNode],{
id : entity.id
});
}
}
return styleNode;
}
function createPlaceMark(Cesium,entity,modelNode){
var position = entity.position;
var placeMarkNode;
var descriptionValue = '';
if(entity.description){
descriptionValue = entity.description.getValue();
}
var description = '<![CDATA[{description}]]>'.replace('{description}',descriptionValue);
var entityName = '<![CDATA[{name}]]>'.replace('{name}',entity.name);
if(modelNode){
var nameNode = createNode('name',entityName);
var descriptionNode = createNode('description',description);
placeMarkNode = addNodes('Placemark',[nameNode,descriptionNode,modelNode]);
}
else{
if(position instanceof Cesium.CompositePositionProperty){
var intervals = position.intervals;
if(intervals && intervals instanceof Cesium.TimeIntervalCollection){
var timeInterval = intervals._intervals[0];
if(timeInterval && timeInterval instanceof Cesium.TimeInterval){
var data = timeInterval.data._value._property;
var times = [];
var values = data._values;
var points = [];
var len = data._times.length;
var j = 0;
var i = 0;
while(j < len){
points.push(new Cesium.Cartesian3(values[i],values[i+1],values[i+2]));
var time = data._times[j];
times[j] = Cesium.JulianDate.toIso8601(time);
j++;
i = i + 3;
}
var trackNodes = [];
for(var i = 0,j = times.length;i < j;i++){
var coord = Cesium.Cartographic.fromCartesian(points[i]);
var lon = Cesium.Math.toDegrees(coord.longitude);
var lat = Cesium.Math.toDegrees(coord.latitude);
var height = coord.height
var coordStr = lon + ' ' + lat + ' ' + height;
var coordNode = createNode('gx:coord',coordStr);
var whenNode = createNode('when',times[i]);
trackNodes.push(whenNode);
trackNodes.push(coordNode);
}
var trackNode = addNodes('gx:Track',trackNodes);
var altitudeModeNode = createNode('altitudeMode','absolute');
var interpolateNode = createNode('gx:interpolate','1');
var multiTrackNode = addNodes('gx:MultiTrack',[altitudeModeNode,interpolateNode,trackNode]);
var styleUrlNode = createNode('styleUrl','#' + entity.id);
var descriptionNode = createNode('description',description);
var nameNode = createNode('name',entityName);
placeMarkNode = addNodes('Placemark',[nameNode,descriptionNode,styleUrlNode,multiTrackNode],{
id : entity.id
});
}
}
}
else if(position instanceof Cesium.SampledPositionProperty){
var data = position._property;
var times = [];
var values = data._values;
var points = [];
var len = data._times.length;
var j = 0;
var i = 0;
while(j < len){
points.push(new Cesium.Cartesian3(values[i],values[i+1],values[i+2]));
var time = data._times[j];
times[j] = Cesium.JulianDate.toIso8601(time);
j++;
i = i + 3;
}
var trackNodes = [];
for(var i = 0,j = times.length;i < j;i++){
var coord = Cesium.Cartographic.fromCartesian(points[i]);
var lon = Cesium.Math.toDegrees(coord.longitude);
var lat = Cesium.Math.toDegrees(coord.latitude);
var height = coord.height
var coordStr = lon + ' ' + lat + ' ' + height;
var coordNode = createNode('gx:coord',coordStr);
var whenNode = createNode('when',times[i]);
trackNodes.push(whenNode);
trackNodes.push(coordNode);
}
var trackNode = addNodes('gx:Track',trackNodes);
var altitudeModeNode = createNode('altitudeMode','absolute');
var interpolateNode = createNode('gx:interpolate','1');
var multiTrackNode = addNodes('gx:MultiTrack',[altitudeModeNode,interpolateNode,trackNode]);
var styleUrlNode = createNode('styleUrl','#' + entity.id);
var descriptionNode = createNode('description',description);
var nameNode = createNode('name',entityName);
placeMarkNode = addNodes('Placemark',[nameNode,descriptionNode,styleUrlNode,multiTrackNode],{
id : entity.id
});
}
else{
var point = position._value;
var coord = Cesium.Cartographic.fromCartesian(point);
var lon = Cesium.Math.toDegrees(coord.longitude);
var lat = Cesium.Math.toDegrees(coord.latitude);
var coordStr = lon + ',' + lat + ',' + coord.height;
var coordNode = createNode('coordinates',coordStr);
var pointNode = addNode('Point',coordNode);
var nameNode = createNode('name',entityName);
var descriptionNode = createNode('description',description);
var styleUrlNode = createNode('styleUrl','#' + entity.id);
var altitudeModeNode = createNode('altitudeMode','absolute');
placeMarkNode = addNodes('Placemark',[nameNode,descriptionNode,styleUrlNode,altitudeModeNode,pointNode]);
}
}
return placeMarkNode;
}
function write(Cesium,entity){
var styleNode;
var modelNode;
var geometryNode;//暂时不支持
var placeMarkNode;
if(entity.billboard){
styleNode = createStyleNode(entity);
placeMarkNode = createPlaceMark(Cesium,entity,modelNode);
}
else if(entity.model){
modelNode = createModelNode(Cesium,entity);
placeMarkNode = createPlaceMark(Cesium,entity,modelNode);
}
else{
}
return {
placeMarkNode : placeMarkNode,
styleNode : styleNode
};
}
function createXML(content){
var head = '<?xml version="1.0" encoding="UTF-8"?>';
var nameSpace = '<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:atom="http://www.w3.org/2005/Atom">';
return [
head,
nameSpace,
content,
'</kml>'
].join('\n');
}
function writeKml(Cesium,entities){
//var dataSources = viewer.dataSources._dataSources;
/*for(var i = 0,j = dataSources.length;i < j;i++){
var dataSource = dataSources[i];
var entities = dataSource.entities.values;
for(var m = 0,n = entities.length;m < n;m++){
objs.push(write(entities[m]));
}
}*/
var objs = [];
for(var m = 0,n = entities.length;m < n;m++){
objs.push(write(Cesium,entities[m]));
}
var openNode = createNode('open','1');
var visibilityNode = createNode('visibility','1');
var nameNode = createNode('name','<![CDATA[test]]>');
var nodes = [openNode,visibilityNode,nameNode];
for(var i = 0,j = objs.length;i < j;i++){
var obj = objs[i];
nodes.push(obj['styleNode']);
nodes.push(obj['placeMarkNode']);
}
var documentNode = addNodes('Document',nodes);
var kmlNode = createXML(documentNode);
return kmlNode;
}
function addOnlyAttrNode(nodeName,attr){
var startTag = '<' + nodeName;
var result = [startTag];
for(var key in attr){
result.push(key + '=' + '\"' + attr[key] + '\"');
}
result.push('/>');
return result.join(' ');
}
function createNode(name,content){
var startTag = '<' + name + '>';
var endTag = '</' + name + '>';
return [
startTag,
content,
endTag
].join('');
}
function addNodes(parent,children,attr){
var startTag = '<' + parent;
for(var key in attr){
startTag += (' ' + key + '=' + '\"' + attr[key] + '\"' + ' ');
}
startTag += '>';
var endTag = '</' + parent + '>';
var result = [];
result.push(startTag);
for(var i = 0,j = children.length;i < j;i++){
var child = children[i];
if(child){
result.push(child);
}
}
result.push(endTag);
return result.join('\n');
}
function addNode(parent,child){
var startTag = '<' + parent + '>';
var endTag = '</' + parent + '>';
return [
startTag,
child,
endTag
].join('\n');
}
function saveKml(Cesium,viewer){
var entities = [].concat(viewer.entities.values);
var dataSources = viewer.dataSources._dataSources;
for(var i = 0,j = dataSources.length;i < j;i++){
var dataSource = dataSources[i];
var dataSourceEntities = dataSource.entities.values;
for(var m = 0,n = dataSourceEntities.length;m < n;m++){
entities = entities.concat(dataSourceEntities[m]);
}
}
var kmlContent = writeKml(Cesium,entities);
var uri = 'data:text;charset=utf-8,' + encodeURIComponent(kmlContent);
var downloadLink = document.createElement("a");
downloadLink.href = uri;
var fileName = "myPlaceMarker" + "_" + new Date().toLocaleDateString() + ".kml";
downloadLink.download = fileName;
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
}
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