标签：archive hive val tst img tiles false path 更新
Nasa支持的WorldWind项目最近推出了1.4RC5版，可以加入三维模型，效果如下图所示：
WW1.4对XML配置文件增加了许多新的元素，其中ModelFeature就是用来增加三维模型的，如下所示：
<?xml version="1.0" encoding="utf-8"?> <LayerSet Name="Clart Test" ShowOnlyOneLayer="false" ShowAtStartup="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="LayerSet.xsd"> <ModelFeature ShowAtStartup="true"> <Name>Tiny1</Name> <DistanceAboveSurface>160.0</DistanceAboveSurface> <Latitude> <Value>39.93</Value> </Latitude> <Longitude> <Value>116.400002</Value> </Longitude> <ScaleFactor>2</ScaleFactor> <MeshFilePath>Data\Model\tiny.x</MeshFilePath> <Orientation> <RotationX>0.0</RotationX> <RotationY>90.0</RotationY> <RotationZ>90.0</RotationZ> </Orientation> <MaxViewRange>10000.0</MaxViewRange> <MinViewRange>10</MinViewRange> </ModelFeature> <ModelFeature ShowAtStartup="true"> <Name>Tiny2</Name> <DistanceAboveSurface>160.0</DistanceAboveSurface> <Latitude> <Value>39.93</Value> </Latitude> <Longitude> <Value>116.410002</Value> </Longitude> <ScaleFactor>2</ScaleFactor> <MeshFilePath>Data\Model\tiny.x</MeshFilePath> <Orientation> <RotationX>0.0</RotationX> <RotationY>-90.0</RotationY> <RotationZ>90.0</RotationZ> </Orientation> <MaxViewRange>10000.0</MaxViewRange> <MinViewRange>10</MinViewRange> </ModelFeature> </LayerSet>
本来在LayerSet.xsd中应该对其进行描术，不过我下载的最新版本中该文件还没有更新，所以在VS2005里对这个XML文件进行编辑时会提示找不到ModelFeature这个元素，不用管它，打开源代码在WorldWind项目里的ConfigurationLoader单元，找到getRenderableFromLayerFile函数，有这样一段代码：
addImageLayersFromXPathNodeIterator(iter.Current.Select("ImageLayer"), parentWorld, parentRenderable); addQuadTileLayersFromXPathNodeIterator(iter.Current.Select("QuadTileSet"), parentWorld, parentRenderable, cache); addPathList(iter.Current.Select("PathList"), parentWorld, parentRenderable); addPolygonFeature(iter.Current.Select("PolygonFeature"), parentWorld, parentRenderable); addLineFeature(iter.Current.Select("LineFeature"), parentWorld, parentRenderable); addModelFeature(iter.Current.Select("ModelFeature"), parentWorld, parentRenderable); addWater(iter.Current.Select("Water"), parentWorld, parentRenderable); addTiledPlacenameSet(iter.Current.Select("TiledPlacenameSet"), parentWorld, parentRenderable); addTiledWFSPlacenameSet(iter.Current.Select("TiledWFSPlacenameSet"), parentWorld, parentRenderable); addIcon(iter.Current.Select("Icon"), parentWorld, parentRenderable, cache); addScreenOverlays(iter.Current.Select("ScreenOverlay"), parentWorld, parentRenderable, cache); addChildLayerSet(iter.Current.Select("ChildLayerSet"), parentWorld, parentRenderable, cache); addExtendedInformation(iter.Current.Select("ExtendedInformation"), parentRenderable);
从这可以看出，源程序已经对ModelFeature提供了支持，而在addModelFeature函数中可以找到所有ModelFeature 的子元素，如“Name”、“Latitude”“Longitude”等。
private static void addModelFeature(XPathNodeIterator iter, World parentWorld, RenderableObjectList parentRenderable) { if (iter.Count > 0) { while (iter.MoveNext()) { string name = getInnerTextFromFirstChild(iter.Current.Select("Name")); string refreshurl = getInnerTextFromFirstChild(iter.Current.Select("RefreshURL")); float lat = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.Select("Latitude"))); float lon = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.Select("Longitude"))); float alt = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.Select("DistanceAboveSurface"))); float scaleFactor = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.Select("ScaleFactor"))); string meshFilePath = getInnerTextFromFirstChild(iter.Current.Select("MeshFilePath")); float rotX = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.SelectSingleNode("Orientation") .Select("RotationX"))); float rotY = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.SelectSingleNode("Orientation") .Select("RotationY"))); float rotZ = Convert.ToSingle(getInnerTextFromFirstChild(iter.Current.SelectSingleNode("Orientation") .Select("RotationZ"))); ModelFeature model = new ModelFeature(name, parentWorld , meshFilePath, lat, lon, alt,scaleFactor,rotX,rotY,rotZ); model.RefreshURL = refreshurl; parentRenderable.Add(model); } } }
根据这些，我们只要生成一个XML文件放到相应模型（如Earth）的配置文件目录，就可以显示自己的三维模型啦! 
我做了一个例子，下载后，解压到WorldWind1.4的安装目录（如：D:\Program Files\NASA\World Wind 1.4 ），重新启动程序在图层管理里可以看到一个新的层，如下图所示：
再用菜单Edit->Place Finder跳转到相应的坐标就可以看到自己的模型了，如下图所示：
例子下载地址：http://www.cnblogs.com/Files/reonlyrun/ClarkTest.rar
原文链接：在WorldWind中加入三维模型
标签：archive hive val tst img tiles false path 更新
原文地址：https://www.cnblogs.com/rainbow70626/p/12128410.html
