我正在开发一个显示Google地球和kml对象的网页。将有两个框架,一个是地球+ kml对象,另一个是显示kml对象的信息,如高度,纬度,经度...用于存储kml模型对象的JavaScript全局变量
我完成了加载kml对象并显示其信息页。现在,我想添加一些事件来控制键盘上的kml对象,将其移动并将所有协调变化反映到显示框上。
为了做到这一点,我创建自己的对象:
//Constructor for object ModelInfo
function ModelInfo(name) {
var me = this;
me.model = null;
me.name = name;
me.lon = 120.89250214028388;
me.lat = 22.17480037801846;
me.alt = 15.00;
me.heading = 0.0;
me.tilt = 0.0;
me.roll = 0.0;
me.kmlUrl = "";
me.ALTITUDE_MODE = ge.ALTITUDE_RELATIVE_TO_GROUND;
me.scaleX = 0.3;
me.scaleY = 0.3;
me.scaleZ = 0.3;
}
当我fetchKml,我存储KML模型到我objectInfo.model:
// Fetch a KML file and show it
function finished(object, objInfo) {
if (!object) {
// wrap alerts in API callbacks and event handlers
// in a setTimeout to prevent deadlock in some browsers
setTimeout(function() {
alert('Bad or null KML.');
}, 0);
return;
}
var modelPlacemark;
walkKmlDom(object, function() {
if (this.getType() == 'KmlPlacemark' && this.getGeometry()
&& this.getGeometry().getType() == 'KmlModel') {
modelPlacemark = this;
}
});
var model = modelPlacemark.getGeometry();
objInfo.model = model;
这是我的呼吁fetchKml
shutter = new ModelInfo("Shutter"); //shutter is global variable
shutter.kmlUrl = 'http://120.125.80.113/kml/student/space_shuttle_23_20110812a/space_shuttle_23_20110812a_SP.kmz';
google.earth.fetchKml(ge, shutter.kmlUrl, function(obj) {
finished(obj, shutter);
});
但问题是,fetchKml完成后,我尝试访问快门.MODEL,它始终是空,但是当我从函数内访问shutter.model 完成,它不是空
所以我的问题是如何发生的?无论如何将kml对象存储在全局变量中以稍后修改其属性?
感谢, 汉斯