[WorldWind学习]15.模型加载

http://blog.csdn.net/jk276993857/article/details/5951738验证其可行性。只是模型太小，很难找到。在ConfigurationLoader.cs和ModelFeature类中设置断点监视：

public override void Initialize(DrawArgs drawArgs)
        {
            if(!IsVisible(drawArgs.WorldCamera))
                return;

            try
            {
                if(meshFileName.EndsWith(".x"))
 9                     LoadDirectXMesh(drawArgs);//设置断点，反复改变球，最终找到。注意大概缩放到的经纬度(116.4E,39.9N)
                else if(meshFileName.EndsWith(".dae")||meshFileName.EndsWith(".xml"))
                    LoadColladaMesh(drawArgs);
                if (mesh == null)
                    throw new InvalidMeshException();
                
                vertExaggeration = World.Settings.VerticalExaggeration;
                if (isElevationRelative2Ground==true)
                    currentElevation = World.TerrainAccessor.GetElevationAt(Latitude, Longitude);
                

                isInitialized = true;
            }
            catch(Exception caught)
            {
                Utility.Log.Write( caught );
                errorMsg = "Failed to read mesh from " + meshFileName;
            }
        }

同时修改模型的缩放因子ScaleFactor：

<?xml version="1.0" encoding="utf-8"?>
<LayerSet Name="Clark 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>560.0</DistanceAboveSurface>
    <Latitude>
      <Value>39.93</Value>
    </Latitude>
    <Longitude>
      <Value>116.400002</Value>
    </Longitude>
12     <ScaleFactor>100</ScaleFactor>
    <MeshFilePath>C:\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>

 <LineFeature ShowAtStartup="true">
    <Name>Sample Line</Name>
    <ExtrudeHeight>20000</ExtrudeHeight>
    <ExtrudeUpwards>false</ExtrudeUpwards>
    <DistanceAboveSurface>50000</DistanceAboveSurface>
    <MinimumDisplayAltitude>10</MinimumDisplayAltitude>
    <MaximumDisplayAltitude>5000000</MaximumDisplayAltitude>
    <LineString>
      <posList>-120,35,10000 -119,36,20000 -120,38,100000 -122,38,60000</posList>
    </LineString>
    <FeatureColor>
      <Red>255</Red>
      <Green>100</Green>
      <Blue>0</Blue>
    </FeatureColor>
    <Outline>true</Outline>
    <OutlineColor>
      <Red>100</Red>
      <Green>100</Green>
      <Blue>100</Blue>
    </OutlineColor>
    <Opacity>150</Opacity>
  </LineFeature>  
</LayerSet>