ArcEngine由点生成TIN

这两天替别人写一个三维校园的展示程序。用的是SceneControl二次开发。

须要利用DOM和TIN构建三维地形。如今说下依据高程点生成TIN的过程：

（1）依据高程点文件（Excel）生成点shapefile

（2）使用ITinEdit的AddFromFeatureClass方法生成TIN

高程点数据格式例如以下：



操作界面例如以下：


：

生成TIN效果图：



代码非常easy理解，例如以下：

#region 创建TIN
private void button_ok_Click(object sender , EventArgs e)
{
try
{
strTinName=textBox_TINName.Text;
outFolder=textBox_outpath.Text;
if (strTinName=="")
{
MessageBox.Show("请输入TIN名称！");
}
else if (outFolder=="")
{
MessageBox.Show("请选择TIN保存路径");
}
else
{
//生成点shape
Excel2Shape excel2shape = new Excel2Shape(textBox_point.Text);
excel2shape.CreateShapeFromExcel();

//获取shapefile
string path = excel2shape.path;
string name = excel2shape.name;

IWorkspaceFactory pWSFac = new ShapefileWorkspaceFactoryClass();
IFeatureWorkspace pFeatureWS = pWSFac.OpenFromFile(path , 0) as IFeatureWorkspace;
IFeatureClass pFeatureClass = pFeatureWS.OpenFeatureClass(name);
IField pField = pFeatureClass.Fields.get_Field(pFeatureClass.FindField("Z"));
//创建TIN
ITin pTin = Create_TIN(pFeatureClass , pField , outFolder);
ITinLayer pTinlayer = new TinLayerClass();
pTinlayer.Dataset = pTin;
pTinlayer.Name = strTinName;

pSceneControl.SceneGraph.Scene.AddLayer(pTinlayer as ILayer , true);

this.Close();
}

}
catch (System.Exception ex)
{
MessageBox.Show(ex.Message + "创建TIN失败。");
}

}
/// <summary>
/// 创建TIN
/// </summary>
/// <param name="pFeatureClass">点要素类</param>
/// <param name="pField">Z字段</param>
/// <param name="pPath">路径</param>
public ITin Create_TIN(IFeatureClass pFeatureClass , IField pField , string pPath)
{
IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
ITinEdit pTinEdit = new TinClass();
pTinEdit.InitNew(pGeoDataset.Extent);
object pObj = Type.Missing;

pTinEdit.AddFromFeatureClass(pFeatureClass , null , pField , null ,
esriTinSurfaceType.esriTinMassPoint , ref pObj);
if (System.IO.File.Exists(pPath))
{
_3DCampus.helper.FolderHelper.DeleteFolder(pPath);
}
pTinEdit.SaveAs(pPath , ref pObj);
pTinEdit.Refresh();
return pTinEdit as ITin;

}
#endregion