我正在致力于将 MATLAB 与 Google Earth 插件连接起来。该界面使用 Internet Explorer ActiveX 控件作为 Google 地球插件的主机，因为该插件使用 JavaScript。
在下面的简单演示 (testJS.html) 中，我使用预定义的坐标成功模仿了 Google 地球中的直线运动。 (仅适用于 Firefox 和 IE，尽管在 IE 上速度有点快)。
使用相同的坐标，我从 MATLAB 脚本调用了 JavaScript 方法。我得到的不是直线运动，而是之字形运动。起初，我认为问题出在输入的小数位上，因为 Google 地球仅支持最多 6 位小数。但是，减少小数位数也没有带来任何乐趣。
有谁知道出了什么问题吗？
谢谢。
万。
p.s:下面是文件。 testJS.html 是一个 JavaScript 演示。 TestOhneSimulink.m 是 MATLAB 代码。 pluginhost3.html是插件的宿主html文档。
http://dl.dropbox.com/u/13293991/TestOhneSimulink.m
% Initialisation for Google Earth Plugin
global h
% Customizing the figure window
hFig = figure(1);
set(hFig,'Name','Google Earth Plugin','Toolbar','none','Menubar','none','Position',[100,100,800,600])
hFig = figure(1);
cood = [ 0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231230000000 0.109224940000000 4.697156860000000;
0.484231240000000 0.109224980000000 4.697156860000000;
0.484231260000000 0.109225050000000 4.697156860000000;
0.484231270000000 0.109225120000000 4.697156860000000;
0.484231290000000 0.109225200000000 4.697156860000000;
0.484231320000000 0.109225300000000 4.697156910000000;
0.484231360000000 0.109225480000000 4.697157630000000;
0.484231410000000 0.109225690000000 4.697161530000000;
0.484231470000000 0.109225930000000 4.697174400000000;
0.484231540000000 0.109226210000000 4.697206270000000;
0.484231610000000 0.109226520000000 4.697271230000000;
0.484231700000000 0.109226860000000 4.697386810000000;
0.484231720000000 0.109226970000000 4.697430900000000;
0.484231720000000 0.109226970000000 4.697430900000000;
0.484231810000000 0.109227350000000 4.697775960000000;
0.484231840000000 0.109227480000000 4.698040690000000;
0.484231840000000 0.109227480000000 4.698040690000000;
0.484231950000000 0.109227900000000 4.699629949999999;
0.484232060000000 0.109228350000000 4.702419819999999;
0.484232170000000 0.109228820000000 4.706433960000000;
0.484232290000000 0.109229320000000 4.711695610000000;
0.484232420000000 0.109229850000000 4.718227120000000;
0.484232550000000 0.109230390000000 4.726049560000000;
0.484232690000000 0.109230960000000 4.735182390000000;
0.484232830000000 0.109231540000000 4.745643230000000;
0.484232970000000 0.109232140000000 4.757447729999999;
0.484233120000000 0.109232760000000 4.770609470000000;
0.484233270000000 0.109233390000000 4.785139999999999;
0.484233430000000 0.109234030000000 4.801048860000000;
0.484233590000000 0.109234690000000 4.818343670000000;
0.484233750000000 0.109235360000000 4.837030240000000;
0.484233910000000 0.109236040000000 4.857112689999999;
0.484234080000000 0.109236730000000 4.878593510000000;
0.484234250000000 0.109237430000000 4.901473930000000;
0.484234420000000 0.109238140000000 4.925754380000000;
0.484234590000000 0.109238860000000 4.951434910000000;
0.484234770000000 0.109239590000000 4.978515540000000;
0.484234950000000 0.109240340000000 5.006996279999999;
0.484235130000000 0.109241090000000 5.036877140000000;
0.484235320000000 0.109241850000000 5.068158130000000;
0.484235500000000 0.109242630000000 5.100839260000000;
0.484235690000000 0.109243410000000 5.134920530000000;
0.484235880000000 0.109244200000000 5.170401970000000;
0.484236080000000 0.109245010000000 5.207283580000000;
0.484236280000000 0.109245820000000 5.245565370000000;
0.484236470000000 0.109246650000000 5.285247340000000;
0.484236680000000 0.109247480000000 5.326329519999999;
0.484236880000000 0.109248330000000 5.368811910000000;
0.484237090000000 0.109249190000000 5.412694520000000;
0.484237300000000 0.109250050000000 5.457977370000000;
0.484237510000000 0.109250930000000 5.504660450000000;
0.484237720000000 0.109251820000000 5.552743789999999;
0.484237940000000 0.109252720000000 5.602227390000000;
0.484238160000000 0.109253620000000 5.653111259999999;
0.484238330000000 0.109254340000000 5.693655699999999;];
cood=cood*100;
% Creating COM server
h = actxcontrol('Shell.Explorer', [0 0 800 600]);
% Open Google Earth Plugin Host
invoke(h,'Navigate2',strcat(pwd,'\pluginhost3.html'));
% Wait until the Document finished loading
while strcmp(h.Document.title,'Google Earth Plugin - Ready')~=1
pause(0.01)
end
h.Document.parentWindow.execScript(['UpdateCamera(' num2str(48.423123045697500) ',' ...
num2str(10.922493539400300) ',' ...
num2str(469.7156861096700) ',' ...
num2str(70) ',' ...
num2str(90) ',' ...
num2str(0) ');'] , 'JavaScript');
disp('Press Any Key To Continue');
pause;
for i=1:65
h.Document.parentWindow.execScript(['tickAnimation(' num2str(cood(i,1)) ',' ...
num2str(cood(i,2)) ',' ...
num2str(cood(i,3)) ',' ...
num2str(70) ',' ...
num2str(90) ',' ...
num2str(0) ');'] , 'JavaScript');
while strcmp(h.Document.title,'Google Earth Plugin - tic')~=1
pause(0.01)
end
end
http://dl.dropbox.com/u/13293991/pluginhost3.html
http://dl.dropbox.com/u/13293991/testJS.html
或者如果上面不起作用
http://www.hs-augsburg.de/~bizz145/earth/testJS.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<head>
<title>Google Earth Plug-in</title>
<!-- NOTE: replace the key below with your own key -->
<script type="text/javascript" src="http://www.google.com/jsapi?key=ABQIAAAASCAedFja1cLViBwu5vZBhhS5GayC4xe98VdZPgzqVN2-dFqZ9BQEClMgNeXYIQ2dDJ_adQGmjS2n6A"></script>
<script type="text/javascript">
google.load('earth', '1');
var ge = null;
function init() {
google.earth.createInstance('map3d', initCallback, failureCallback);
}
function initCallback(pluginInstance) {
ge = pluginInstance;
ge.getWindow().setVisibility(true);
// tell the application the plugin is ready
document.title = "Google Earth Plugin - Ready";
// prevent mouse navigation in the plugin
ge.getOptions().setMouseNavigationEnabled(false);
var camera = ge.getView().copyAsCamera(ge.ALTITUDE_ABSOLUTE);
camera.setLatitude(48.423123);
camera.setLongitude(10.922494);
camera.setAltitude(469.715686);
camera.setHeading(70.000000);
camera.setTilt(90.000000);
camera.setRoll(0.000000);
ge.getOptions().setFlyToSpeed(ge.SPEED_TELEPORT);
ge.getView().setAbstractView(camera);
// Set the FlyTo speed
ge.getOptions().setFlyToSpeed(ge.SPEED_TELEPORT);
// Update the view in Google Earth
ge.getView().setAbstractView(camera);
}
function failureCallback(error) {
}
function startAnimationClick() {
ge.getOptions().setFlyToSpeed(ge.SPEED_TELEPORT);
for(i=1;i<=62;i++) {
google.earth.addEventListener(ge,'frameend',tickAnimation(i));
}
// start it off
tickAnimation(0);
}
function tickAnimation(i) {
var camera = ge.getView().copyAsCamera(ge.ALTITUDE_ABSOLUTE);
var Latitude = new Array( )
Latitude[0] = (48.4231230456975);
Latitude[1] = (48.4231230456975);
Latitude[2] = (48.4231230456975);
Latitude[3] = (48.4231230456975);
Latitude[4] = (48.4231230456975);
Latitude[5] = (48.4231230456975);
Latitude[6] = (48.4231230456978);
Latitude[7] = (48.4231230457054);
Latitude[8] = (48.4231230458949);
Latitude[9] = (48.4231230506331);
Latitude[10] = (48.4231231690862);
Latitude[11] = (48.4231240370352);
Latitude[12] = (48.4231257354662);
Latitude[13] = (48.4231274110900);
Latitude[14] = (48.4231294904544);
Latitude[15] = (48.4231319097717);
Latitude[16] = (48.4231361613361);
Latitude[17] = (48.4231412401686);
Latitude[18] = (48.4231471403964);
Latitude[19] = (48.4231538517288);
Latitude[20] = (48.4231613594480);
Latitude[21] = (48.4231696448577);
Latitude[22] = (48.4231720987612);
Latitude[23] = (48.4231720987612);
Latitude[24] = (48.4231813451532);
Latitude[25] = (48.4231844782562);
Latitude[26] = (48.4231844782562);
Latitude[27] = (48.4231946597878);
Latitude[28] = (48.4232055084529);
Latitude[29] = (48.4232169896683);
Latitude[30] = (48.4232290674080);
Latitude[31] = (48.4232417047580);
Latitude[32] = (48.4232548644764);
Latitude[33] = (48.4232685095587);
Latitude[34] = (48.4232826038070);
Latitude[35] = (48.4232971124025);
Latitude[36] = (48.4233120024806);
Latitude[37] = (48.4233272437069);
Latitude[38] = (48.4233428088542);
Latitude[39] = (48.4233586743784);
Latitude[40] = (48.4233748209942);
Latitude[41] = (48.4233912342494);
Latitude[42] = (48.4234079049223);
Latitude[43] = (48.4234248283822);
Latitude[44] = (48.4234420030174);
Latitude[45] = (48.4234594285689);
Latitude[46] = (48.4234771049934);
Latitude[47] = (48.4234950322493);
Latitude[48] = (48.4235132102953);
Latitude[49] = (48.4235316390898);
Latitude[50] = (48.4235503185914);
Latitude[51] = (48.4235692487584);
Latitude[52] = (48.4235884295493);
Latitude[53] = (48.4236078609225);
Latitude[54] = (48.4236275428364);
Latitude[55] = (48.4236474752493);
Latitude[56] = (48.4236676581195);
Latitude[57] = (48.4236880914052);
Latitude[58] = (48.4237087750649);
Latitude[59] = (48.4237297090566);
Latitude[60] = (48.4237508933386);
Latitude[61] = (48.4237723278691);
Latitude[62] = (48.4237940126062);
Latitude[63] = (48.4238159475080);
var Longitude = new Array( )
Longitude[0] = (10.9224935394003);
Longitude[1] = (10.9224935394003);
Longitude[2] = (10.9224935394003);
Longitude[3] = (10.9224935394003);
Longitude[4] = (10.9224935394003);
Longitude[5] = (10.9224935394004);
Longitude[6] = (10.9224935394016);
Longitude[7] = (10.9224935394330);
Longitude[8] = (10.9224935402176);
Longitude[9] = (10.9224935598340);
Longitude[10] = (10.9224940502431);
Longitude[11] = (10.9224976436470);
Longitude[12] = (10.9225046753396);
Longitude[13] = (10.9225116126099);
Longitude[14] = (10.9225202214143);
Longitude[15] = (10.9225302376668);
Longitude[16] = (10.9225478396446);
Longitude[17] = (10.9225688666283);
Longitude[18] = (10.9225932943132);
Longitude[19] = (10.9226210801061);
Longitude[20] = (10.9226521630864);
Longitude[21] = (10.9226864658615);
Longitude[22] = (10.9226966253816);
Longitude[23] = (10.9226966253816);
Longitude[24] = (10.9227349068413);
Longitude[25] = (10.9227478783761);
Longitude[26] = (10.9227478783761);
Longitude[27] = (10.9227900315565);
Longitude[28] = (10.9228349468661);
Longitude[29] = (10.9228824811404);
Longitude[30] = (10.9229324852420);
Longitude[31] = (10.9229848063565);
Longitude[32] = (10.9230392903111);
Longitude[33] = (10.9230957839149);
Longitude[34] = (10.9231541373153);
Longitude[35] = (10.9232142063690);
Longitude[36] = (10.9232758550220);
Longitude[37] = (10.9233389576954);
Longitude[38] = (10.9234034016728);
Longitude[39] = (10.9234690894869);
Longitude[40] = (10.9235359413022);
Longitude[41] = (10.9236038972918);
Longitude[42] = (10.9236729192853);
Longitude[43] = (10.9237429881205);
Longitude[44] = (10.9238140971337);
Longitude[45] = (10.9238862452629);
Longitude[46] = (10.9239594323388);
Longitude[47] = (10.9240336582001);
Longitude[48] = (10.9241089226857);
Longitude[49] = (10.9241852256344);
Longitude[50] = (10.9242625668851);
Longitude[51] = (10.9243409462766);
Longitude[52] = (10.9244203636480);
Longitude[53] = (10.9245008188381);
Longitude[54] = (10.9245823116860);
Longitude[55] = (10.9246648420306);
Longitude[56] = (10.9247484097110);
Longitude[57] = (10.9248330145664);
Longitude[58] = (10.9249186564357);
Longitude[59] = (10.9250053351582);
Longitude[60] = (10.9250930505730);
Longitude[61] = (10.9251818025193);
Longitude[62] = (10.9252715908363);
Longitude[63] = (10.9253624153634);
var Altitude = new Array( )
Altitude[0] = (469.7156861096700);
Altitude[1] = (469.7156861096700);
Altitude[2] = (469.7156861096700);
Altitude[3] = (469.7156861096700);
Altitude[4] = (469.7156861096700);
Altitude[5] = (469.7156861096700);
Altitude[6] = (469.7156861096700);
Altitude[7] = (469.7156861096700);
Altitude[8] = (469.7156861096700);
Altitude[9] = (469.7156861096700);
Altitude[10] = (469.7156861096700);
Altitude[11] = (469.7156861096700);
Altitude[12] = (469.7156861096700);
Altitude[13] = (469.7156861096700);
Altitude[14] = (469.7156862159641);
Altitude[15] = (469.7156905074050);
Altitude[16] = (469.7157626436327);
Altitude[17] = (469.7161530281460);
Altitude[18] = (469.7174401868500);
Altitude[19] = (469.7206267748753);
Altitude[20] = (469.7271233181284);
Altitude[21] = (469.7386814324996);
Altitude[22] = (469.7430900464778);
Altitude[23] = (469.7430900464778);
Altitude[24] = (469.7775961771575);
Altitude[25] = (469.8040693582731);
Altitude[26] = (469.8040693582731);
Altitude[27] = (469.9629946259733);
Altitude[28] = (470.2419820385869);
Altitude[29] = (470.6433960827681);
Altitude[30] = (471.1695609734226);
Altitude[31] = (471.8227121798819);
Altitude[32] = (472.6049562126647);
Altitude[33] = (473.5182390278476);
Altitude[34] = (474.5643230749208);
Altitude[35] = (475.7447726782004);
Altitude[36] = (477.0609471027976);
Altitude[37] = (478.5140003152721);
Altitude[38] = (480.1048861078195);
Altitude[39] = (481.8343669143261);
Altitude[40] = (483.7030243077464);
Altitude[41] = (485.7112688576162);
Altitude[42] = (487.8593510998858);
Altitude[43] = (490.1473934514949);
Altitude[44] = (492.5754379101905);
Altitude[45] = (495.1434911545312);
Altitude[46] = (497.8515542538756);
Altitude[47] = (500.6996282314109);
Altitude[48] = (503.6877141101633);
Altitude[49] = (506.8158129129977);
Altitude[50] = (510.0839256626186);
Altitude[51] = (513.4920533815692);
Altitude[52] = (517.0401970922322);
Altitude[53] = (520.7283578168288);
Altitude[54] = (524.5565365774196);
Altitude[55] = (528.5247343959043);
Altitude[56] = (532.6329522940215);
Altitude[57] = (536.8811912933489);
Altitude[58] = (541.2694524153035);
Altitude[59] = (545.7977366811410);
Altitude[60] = (550.4660451119564);
Altitude[61] = (555.2743787286838);
Altitude[62] = (560.2227385520963);
Altitude[63] = (565.3111256028059);
//var i =0;
//for(i=0;i<=201;i++) {
camera.setLatitude(Latitude[i]);
camera.setLongitude(Longitude[i]);
camera.setAltitude(Altitude[i]);
camera.setHeading(70.000000);
camera.setTilt(90.000000);
camera.setRoll(0.000000);
ge.getOptions().setFlyToSpeed(ge.SPEED_TELEPORT);
ge.getView().setAbstractView(camera);
//}
}
</script>
<style type="text/css">
html, body {
margin: 0;
width: 100%;
height: 100%;
}
</style>
</head>
<body onload="init()">
<div id="map3d" style="width: 100%; height: 80%;"></div>
<center>
<a onClick=startAnimationClick() href=#>Fly!</a>
</body>
</html>
最佳答案
有几个问题 - 主要是事件监听器的数量和对 tickAnimation() 的调用数量。
您正在创建 62 个事件监听器，每次重绘框架时都会调用所有这些监听器!不需要有一个以上的事件监听器，因为我们需要知道的是何时更新动画。
此外，tickAnimation 函数的结构方式确实效率很低 - 因为每次调用时都重新创建各种坐标数组。
最后，当您添加事件监听器时，您应该只传递对委托(delegate)方法的引用(或使用匿名函数) - 您实际上是在调用 timertick 方法。例如
google.earth.addEventListener(ge,'frameend',tickAnimation(i));
应该是
google.earth.addEventListener(ge,'frameend', tickAnimation);
或
google.earth.addEventListener(ge,'frameend', function() { //something });
无论如何，我清理了这些问题并整理了代码，它似乎对我来说没问题......
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Tranal//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<head>
<title>Google Earth Plug-in</title>
<script type="text/javascript" src="http://www.google.com/jsapi?key=ABQIAAAASCAedFja1cLViBwu5vZBhhS5GayC4xe98VdZPgzqVN2-dFqZ9BQEClMgNeXYIQ2dDJ_adQGmjS2n6A"></script>
<script type="text/javascript">
google.load('earth', '1');
var ge = null;
var camera = null;
var current = 0;
var coordinates = [
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231230, 10.9224935, 469.7156861],
[48.4231231, 10.9224940, 469.7156861],
[48.4231240, 10.9224976, 469.7156861],
[48.4231257, 10.9225046, 469.7156861],
[48.4231274, 10.9225116, 469.7156861],
[48.4231294, 10.9225202, 469.7156862],
[48.4231319, 10.9225302, 469.7156905],
[48.4231361, 10.9225478, 469.7157626],
[48.4231412, 10.9225688, 469.7161530],
[48.4231471, 10.9225932, 469.7174401],
[48.4231538, 10.9226210, 469.7206267],
[48.4231613, 10.9226521, 469.7271233],
[48.4231696, 10.9226864, 469.7386814],
[48.4231720, 10.9226966, 469.7430900],
[48.4231720, 10.9226966, 469.7430900],
[48.4231813, 10.9227349, 469.7775961],
[48.4231844, 10.9227478, 469.8040693],
[48.4231844, 10.9227478, 469.8040693],
[48.4231946, 10.9227900, 469.9629946],
[48.4232055, 10.9228349, 470.2419820],
[48.4232169, 10.9228824, 470.6433960],
[48.4232290, 10.9229324, 471.1695609],
[48.4232417, 10.9229848, 471.8227121],
[48.4232548, 10.9230392, 472.6049562],
[48.4232685, 10.9230957, 473.5182390],
[48.4232826, 10.9231541, 474.5643230],
[48.4232971, 10.9232142, 475.7447726],
[48.4233120, 10.9232758, 477.0609471],
[48.4233272, 10.9233389, 478.5140003],
[48.4233428, 10.9234034, 480.1048861],
[48.4233586, 10.9234690, 481.8343669],
[48.4233748, 10.9235359, 483.7030243],
[48.4233912, 10.9236038, 485.7112688],
[48.4234079, 10.9236729, 487.8593510],
[48.4234248, 10.9237429, 490.1473934],
[48.4234420, 10.9238140, 492.5754379],
[48.4234594, 10.9238862, 495.1434911],
[48.4234771, 10.9239594, 497.8515542],
[48.4234950, 10.9240336, 500.6996282],
[48.4235132, 10.9241089, 503.6877141],
[48.4235316, 10.9241852, 506.8158129],
[48.4235503, 10.9242625, 510.0839256],
[48.4235692, 10.9243409, 513.4920533],
[48.4235884, 10.9244203, 517.0401970],
[48.4236078, 10.9245008, 520.7283578],
[48.4236275, 10.9245823, 524.5565365],
[48.4236474, 10.9246648, 528.5247343],
[48.4236676, 10.9247484, 532.6329522],
[48.4236880, 10.9248330, 536.8811912],
[48.4237087, 10.9249186, 541.2694524],
[48.4237297, 10.9250053, 545.7977366],
[48.4237508, 10.9250930, 550.4660451],
[48.4237723, 10.9251818, 555.2743787],
[48.4237940, 10.9252715, 560.2227385],
[48.4238159, 10.9253624, 565.3111256]
];
function init() {
google.earth.createInstance('map3d', initCallback, failureCallback);
}
function initCallback(pluginInstance) {
ge = pluginInstance;
ge.getWindow().setVisibility(true);
ge.getOptions().setMouseNavigationEnabled(false);
ge.getOptions().setFlyToSpeed(ge.SPEED_TELEPORT);
camera = ge.getView().copyAsCamera(ge.ALTITUDE_ABSOLUTE);
camera.setLatitude(48.423123)
camera.setLongitude(10.922494)
camera.setAltitude(469.715686)
camera.setHeading(70);
camera.setTilt(90);
ge.getView().setAbstractView(camera);
}
function failureCallback(error) {}
function startAnimationClick() {
google.earth.addEventListener(ge, 'frameend', tickAnimation);
tickAnimation();
}
function tickAnimation() {
camera.setLatitude(coordinates[current][0]);
camera.setLongitude(coordinates[current][1]);
camera.setAltitude(coordinates[current][2]);
ge.getView().setAbstractView(camera);
current++;
}
</script>
<style type="text/css">
html, body {
margin: 0;
width: 100%;
height: 100%;
}
</style>
</head>
<body onload="init()">
<div id="map3d" style="width: 100%; height: 80%;"></div>
<center>
<a onClick=startAnimationClick() href=#>Fly!</a>
</body>
</html>
关于javascript - 在 Internet Explorer ActiveX 控件中调用 JavaScript 方法时出现不一致，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6534627/