public virtual void Cut(IGeometry GeoByCut, IGeometry cutter, out IGeometry leftGeom, out IGeometry rightGeom)
{
ITopologicalOperator Top = cutter as ITopologicalOperator;
Top.Simplify();
IPolyline pcutter = Top.Boundary as IPolyline;
Top = GeoByCut as ITopologicalOperator;
try
{
Top.Cut(pcutter, out leftGeom, out rightGeom);
}
catch (Exception ee)
{
leftGeom = null;
rightGeom = null;
System.Diagnostics.Debug.WriteLine(ee.ToString());
}
}
public static bool CutPolygonByLine(IPolygon pPolygon, IPolyline pCutLine, ref IGeometry pRight, ref IGeometry pLeft)
{
pRight = null;
pLeft = null;
if (pPolygon == null || pPolygon.IsEmpty || pCutLine == null || pCutLine.IsEmpty)
{
return(false);
}
try
{
ITopologicalOperator pTopologicalOperator = pPolygon as ITopologicalOperator;
pTopologicalOperator.Cut(pCutLine, out pLeft, out pRight);
return(true);
}
catch (Exception e)
{
return(false);
}
}
public bool Split(IPolyline ipolyline_0, out IGeometryBag igeometryBag_0)
{
bool flag;
IGeometry geometry;
IGeometry geometry1;
igeometryBag_0 = null;
if (this.m_pGeometry.GeometryType != esriGeometryType.esriGeometryPoint)
{
try
{
ITopologicalOperator mPGeometry = this.m_pGeometry as ITopologicalOperator;
if (mPGeometry != null)
{
if (!mPGeometry.IsSimple)
{
mPGeometry.Simplify();
}
mPGeometry.Cut(ipolyline_0, out geometry, out geometry1);
object value = Missing.Value;
igeometryBag_0 = new GeometryBag() as IGeometryBag;
(igeometryBag_0 as IGeometryCollection).AddGeometry(geometry, ref value, ref value);
(igeometryBag_0 as IGeometryCollection).AddGeometry(geometry1, ref value, ref value);
}
else
{
flag = false;
return(flag);
}
}
catch
{
}
flag = false;
}
else
{
flag = false;
}
return(flag);
}
/// <summary>
/// 分割多边形
/// </summary>
/// <param name="polygon"></param>
/// <param name="polyline"></param>
/// <returns></returns>
public static List <IGeometry> CutGeometry(IGeometry polygon, IGeometry polyline)
{
List <IGeometry> geos = new List <IGeometry>();
try
{
IGeometry pLeftGeo, pRightGeo;
ITopologicalOperator pTopologBoundary = polygon as ITopologicalOperator;
pTopologBoundary.Simplify();
pTopologBoundary.Cut((IPolyline)polyline, out pLeftGeo, out pRightGeo);
if (pLeftGeo != null && pRightGeo != null)
{
geos.Add(pLeftGeo);
geos.Add(pRightGeo);
}
}
catch (Exception ex)
{
throw ex;
}
return(geos);
}
//使用外部要素IGeometry进行分割
public virtual void Cut(IGeometry GeoByCut, IPolyline cutter, out IGeometry leftGeom, out IGeometry rightGeom)
{
ITopologicalOperator Top = GeoByCut as ITopologicalOperator;
Top.Cut(cutter, out leftGeom, out rightGeom);
}
public void SplitPolygons() //分割面
{
m_pLineFeed = (INewLineFeedback)m_pFeedback;
if (m_pLineFeed == null)
{
Reset();
return;
}
IPolyline pFeatureScissors = m_pLineFeed.Stop(); //结束绘制切割线
if (pFeatureScissors.Length == 0)
{
Reset();
return;
}
ILayer pFeatureLayer;
pFeatureLayer = m_App.CurrentEditLayer;
IGeometry pOldGeometry;
IFeature pOldFeature;
IWorkspaceEdit pWorkspaceEdit;
pWorkspaceEdit = (IWorkspaceEdit)CommonFunction.GetLayerWorkspace(pFeatureLayer);
if (pWorkspaceEdit == null)
{
return;
}
pWorkspaceEdit.StartEditOperation();
for (int i = 0; i < m_OriginFeatureArray.Count; i++) //遍历每个选中的要素
{
IArray pArrGeo = new ArrayClass();
pOldFeature = (IFeature)m_OriginFeatureArray.get_Element(i);
pOldGeometry = (IGeometry)pOldFeature.Shape;
if ((pOldGeometry == null) || (pFeatureScissors == null))
{
return;
}
if (pOldGeometry.GeometryType != esriGeometryType.esriGeometryPolygon)
{
return;
}
ITopologicalOperator pTopologim_CalOperator = (ITopologicalOperator)pOldGeometry;
IGeometry oRsGeo_1 = null, oRsGeo_2 = null;
try
{
pTopologim_CalOperator.Simplify();
pTopologim_CalOperator.Cut(pFeatureScissors, out oRsGeo_1, out oRsGeo_2);
IGeometryCollection oGeoCol = (IGeometryCollection)oRsGeo_1;
for (int j = 0; j < oGeoCol.GeometryCount; j++)
{
ISegmentCollection oNewPoly = new PolygonClass();
oNewPoly.AddSegmentCollection((ISegmentCollection)oGeoCol.get_Geometry(j));
pArrGeo.Add(oNewPoly);
}
oGeoCol = (IGeometryCollection)oRsGeo_2;
for (int j = 0; j < oGeoCol.GeometryCount; j++)
{
ISegmentCollection oNewPoly = new PolygonClass();
oNewPoly.AddSegmentCollection((ISegmentCollection)oGeoCol.get_Geometry(j));
pArrGeo.Add(oNewPoly);
}
for (int j = 0; j < pArrGeo.Count; j++)
{
CommonFunction.AddFeature0(m_MapControl, (IGeometry)pArrGeo.get_Element(j), m_App.CurrentEditLayer, pOldFeature);
}
pOldFeature.Delete();
}
catch
{
//MessageBox.Show(Ex.ToString());
}
}
m_App.Workbench.CommandBarManager.Tools["2dmap.DFEditorTool.Undo"].SharedProps.Enabled = true;
pWorkspaceEdit.StopEditOperation();
Reset();
}
//to be improved, a vertical cutter may cause unexpected problems
//
public void CreateBufferWithoutEnds(IGeometry fBufferGeo, double dblBuffer)
{
//StartCutPolyline
ILine pStartNormal = new LineClass();
this.pPolyline.QueryNormal(esriSegmentExtension.esriNoExtension, 0, true, dblBuffer, pStartNormal);
IPoint StartFrPt = new PointClass();
pStartNormal.QueryPoint(esriSegmentExtension.esriExtendAtFrom, -1.5, true, StartFrPt);
IPoint StartToPt = new PointClass();
pStartNormal.QueryPoint(esriSegmentExtension.esriExtendAtTo, 1.5, true, StartToPt);
IPointCollection4 pStartCutterCol = new PolylineClass();
pStartCutterCol.AddPoint(StartFrPt);
pStartCutterCol.AddPoint(StartToPt);
IPolyline5 pStartCutter = pStartCutterCol as IPolyline5;
//EndCutPolyline
ILine pEndNormal = new LineClass();
this.pPolyline.QueryNormal(esriSegmentExtension.esriNoExtension, 1, true, dblBuffer, pEndNormal);
IPoint EndFrPt = new PointClass();
pEndNormal.QueryPoint(esriSegmentExtension.esriExtendAtFrom, -1.5, true, EndFrPt);
IPoint EndToPt = new PointClass();
pEndNormal.QueryPoint(esriSegmentExtension.esriExtendAtTo, 1.5, true, EndToPt);
IPointCollection4 pEndCutterCol = new PolylineClass();
pEndCutterCol.AddPoint(EndFrPt);
pEndCutterCol.AddPoint(EndToPt);
IPolyline5 pEndCutter = pEndCutterCol as IPolyline5;
//TopologicalOperators
ITopologicalOperator pStartPtTop = this.pPolyline.FromPoint as ITopologicalOperator;
IGeometry pStartPtBuffer = pStartPtTop.Buffer(dblBuffer);
ITopologicalOperator pEndPtTop = this.pPolyline.ToPoint as ITopologicalOperator;
IGeometry pEndPtBuffer = pEndPtTop.Buffer(dblBuffer);
//Cut
ITopologicalOperator pStartPtBufferTop = pStartPtBuffer as ITopologicalOperator;
IGeometry StartLeftOutGeometry;
IGeometry StartRightOutGeometry;
pStartPtBufferTop.Cut(pStartCutter, out StartLeftOutGeometry, out StartRightOutGeometry);
ITopologicalOperator pEndPtBufferTop = pEndPtBuffer as ITopologicalOperator;
IGeometry EndLeftOutGeometry;
IGeometry EndRightOutGeometry;
pEndPtBufferTop.Cut(pEndCutter, out EndLeftOutGeometry, out EndRightOutGeometry);
//Difference
ITopologicalOperator pBufferTop = fBufferGeo as ITopologicalOperator;
IGeometry pDiffStart = pBufferTop.Difference(StartRightOutGeometry);
ITopologicalOperator pDiffStartTop = pDiffStart as ITopologicalOperator;
IGeometry pDiffEnd = pDiffStartTop.Difference(EndLeftOutGeometry);
_pBufferGeoWithoutEnds = pDiffEnd;
}
