求助，哪位用过GetVolumeAndArea这个函数计算过填方

wyude · 发表于 2014-4-21 20:21

本帖最后由 wyude 于 2014-4-21 20:27 编辑

求助，哪位用过GetVolumeAndArea这个函数计算过填方

tinSurface3.GetVolumeAndArea(pPolygon as IGeometry, height, esriPlaneReferenceType.esriPlaneReferenceBelow, out IsOutsideDataArea, volume, area, proarea);

希望得到指导帮助。程序运行到这里就不继续了，也不报错，而且第四个参数在帮助文档里是ref类型，但是在vs2010里面却是out类型。

我的代码

public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add Length.OnMouseDown implementation
if (Shift == 1) { MessageBox.Show("Only can choose one graph a time"); return; }
IGraphicsContainer3D pGCT3D = m_sceneHookHelper.Scene.BasicGraphicsLayer as IGraphicsContainer3D;
ISceneGraph pSG = m_sceneHookHelper.SceneGraph;
IPoint pPt;
object pOwner, pObject;
pSG.Locate(pSG.ActiveViewer, X, Y, esriScenePickMode.esriScenePickGraphics, false, out pPt, out pOwner, out pObject);
IElement ele = (IElement)pObject;
if (ele is IPolygonElement)
{
IPolygon pPolygon = ele.Geometry as IPolygon;
double height = pPolygon.FromPoint.Z+1;//pPt.Z;
MessageBox.Show("最高点 "+height);
ITinEdit tinEdit = tin as ITinEdit;
// tinEdit.StartEditing();
ITinSurface3 tinSurface3 = tin as ITinSurface3;
bool IsOutsideDataArea = true;
object volume = Type.Missing;
object area = Type.Missing;
object proarea = Type.Missing;
MessageBox.Show("doubi");
tinSurface3.GetVolumeAndArea(pPolygon as IGeometry, height, esriPlaneReferenceType.esriPlaneReferenceBelow, out IsOutsideDataArea, volume, area, proarea);
MessageBox.Show("doubi2"); MessageBox.Show(Convert.ToString(volume) + Convert.ToString(area));
}