private IPolygon FlatBuffer(IPolyline pLline1, double pBufferDis)
{
object o = System.Type.Missing;
//分别对输入的线平移两次（正方向和负方向）
IConstructCurve pCurve1 = new PolylineClass();
pCurve1.ConstructOffset(pLline1, pBufferDis, ref o, ref o);
IPointCollection pCol = pCurve1 as IPointCollection;
IConstructCurve pCurve2 = new PolylineClass();
pCurve2.ConstructOffset(pLline1, -1 * pBufferDis, ref o, ref o);
//把第二次平移的线的所有节点翻转
IPolyline pline2 = pCurve2 as IPolyline;
pline2.ReverseOrientation();
//把第二条的所有节点放到第一条线的IPointCollection里面
IPointCollection pCol2 = pline2 as IPointCollection;
pCol.AddPointCollection(pCol2);
//用面去初始化一个IPointCollection
IPointCollection pPointCol = new PolygonClass();
pPointCol.AddPointCollection(pCol);
//把IPointCollection转换为面
IPolygon pPolygon = pPointCol as IPolygon;
//简化节点次序
pPolygon.SimplifyPreserveFromTo();
return(pPolygon);
}
private static IGeometry GetErrorGeometry([NotNull] IGeometry part)
{
IPointCollection result = new PolygonClass();
result.AddPointCollection((IPointCollection)part);
((IPolygon)result).Close();
((IPolygon)result).SpatialReference = part.SpatialReference;
return((IGeometry)result);
}
private void UpdateFeature(IFeature selectedFeature, IPointCollection4 polylinePoints)
{
IPointCollection4 geometry;
esriGeometryType geometryType = selectedFeature.Shape.GeometryType;
switch (geometryType)
{
case esriGeometryType.esriGeometryMultipoint:
geometry = new MultipointClass();
break;
case esriGeometryType.esriGeometryPolyline:
geometry = new PolylineClass();
break;
case esriGeometryType.esriGeometryPolygon:
geometry = new PolygonClass();
break;
default:
geometry = null;
break;
}
if (geometry == null)
{
return;
}
geometry.AddPointCollection(polylinePoints);
IFeatureClass featureClass = selectedFeature.Class as IFeatureClass;
IDataset dataset = featureClass as IDataset;
IWorkspaceEdit workspaceEdit = dataset.Workspace as IWorkspaceEdit;
if (!(workspaceEdit.IsBeingEdited()))
{
return;
}
try
{
workspaceEdit.StartEditOperation();
selectedFeature.Shape = geometry as IGeometry;
selectedFeature.Store();
workspaceEdit.StopEditOperation();
}
catch (Exception ex)
{
workspaceEdit.AbortEditOperation();
MessageBox.Show("移动要素顶点失败！！" + ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
/// <summary>
/// 计算多边形面积,结果存贮在Area中
/// </summary>
/// <param name="point">计算时的终点</param>
private void CalculateArea(IPoint point)
{
IPointCollection pointCollection = new PolygonClass();
pointCollection.AddPointCollection(_pointCollection);
object ep = System.Reflection.Missing.Value;
pointCollection.AddPoint(point, ref ep, ref ep);
if (pointCollection.PointCount > 2)
{
IArea iArea = (IArea)(IPolygon)pointCollection;
Area = Math.Abs(iArea.Area);
}
}
public static IPolygon GetPolygon([NotNull] IEnumerable <WKSPointVA> points)
{
Assert.ArgumentNotNull(points, nameof(points));
IPointCollection5 mps = new MultipointClass();
foreach (WKSPointVA point in points)
{
WKSPointVA p = point;
mps.InsertWKSPointVA(0, 1, ref p);
}
IPointCollection poly = new PolygonClass();
poly.AddPointCollection(mps);
return((IPolygon)poly);
}
public override void OnDblClick()
{
ITopologicalOperator pTopoOp;
if (m_pPointColl != null)
{
switch (m_DrawType.ToString())
{
case "esriGeometryLine":
IPointCollection pPolyLine = new PolylineClass();
pPolyLine.AddPointCollection(m_pPointColl);
pTopoOp = pPolyLine as ITopologicalOperator;
pTopoOp.Simplify();
m_Geometry = pPolyLine as IGeometry;
//ZQ 20110809
m_Geometry.SpatialReference = m_psurface.Domain.SpatialReference;
//m_Geometry.SpatialReference = m_hookHelper.FocusMap.SpatialReference;
ClsMarkDraw.DeleteAllElementsWithName(m_hookHelper.FocusMap, sPolyOutlineName);
EndDtrawd(true); //触发结束事件
break;
case "esriGeometryPolygon":
if (m_pPointColl.PointCount < 3)
{
return;
}
IPointCollection pPolygon = new PolygonClass();
pPolygon.AddPointCollection(m_pPointColl);
pTopoOp = pPolygon as ITopologicalOperator;
pTopoOp.Simplify();
m_Geometry = pPolygon as IGeometry;
//ZQ 20110809
m_Geometry.SpatialReference = m_psurface.Domain.SpatialReference;
//m_Geometry.SpatialReference = m_hookHelper.FocusMap.SpatialReference;
ClsMarkDraw.DeleteAllElementsWithName(m_hookHelper.FocusMap, sPolyOutlineName);
EndDtrawd(true); //触发结束事件
break;
}
m_pPointColl = null;
}
//Cls3DMarkDraw.DeleteAllElementsWithName(m_sceneHookHelper.Scene, sPolyOutlineName);
m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
/// <summary>
/// 双击表示绘制对象结束
/// </summary>
public override void OnDblClick()
{
ITopologicalOperator pTopoOp;
if (m_pPointColl != null)
{
switch (m_DrawType.ToString())
{
case "esriGeometryLine":
IPointCollection pPolyLine = new PolylineClass();
pPolyLine.AddPointCollection(m_pPointColl);
pTopoOp = pPolyLine as ITopologicalOperator;
pTopoOp.Simplify();
m_Geometry = pPolyLine as IGeometry;
m_Geometry.SpatialReference = m_sceneHookHelper.Scene.SpatialReference;
Cls3DMarkDraw.DeleteAllElementsWithName(m_sceneHookHelper.Scene, sPolyOutlineName);
EndDtrawd(true); //触发结束事件
break;
case "esriGeometryPolygon":
if (m_pPointColl.PointCount < 3)
{
return;
}
IPointCollection pPolygon = new PolygonClass();
pPolygon.AddPointCollection(m_pPointColl);
pTopoOp = pPolygon as ITopologicalOperator;
pTopoOp.Simplify();
m_Geometry = pPolygon as IGeometry;
m_Geometry.SpatialReference = m_sceneHookHelper.Scene.SpatialReference;
Cls3DMarkDraw.DeleteAllElementsWithName(m_sceneHookHelper.Scene, sPolyOutlineName);
EndDtrawd(true); //触发结束事件
break;
}
m_pPointColl = null;
}
//Cls3DMarkDraw.DeleteAllElementsWithName(m_sceneHookHelper.Scene, sPolyOutlineName);
m_sceneHookHelper.SceneGraph.RefreshViewers();
}
/// <summary>
/// 计算多边形面积,结果存贮在Area中
/// </summary>
/// <param name="point">计算时的终点</param>
private void CalculateArea(IPoint point)
{
try
{
IPointCollection pointCollection = new PolygonClass();
pointCollection.AddPointCollection(_pointCollection);
object ep = System.Reflection.Missing.Value;
pointCollection.AddPoint(point, ref ep, ref ep);
if (pointCollection.PointCount > 2)
{
IPolygon pPolygon = (IPolygon)pointCollection;
IArea pArea = (IArea)pPolygon;
Area = pArea.Area;
Area = Math.Abs(Area);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
private IPolygon FlatBuffer(IPolyline pLline1, double pBufferDis)
{
object o = System.Type.Missing;
//分别对输入的线平移两次（正方向和负方向）
IConstructCurve pCurve1 = new PolylineClass();
pCurve1.ConstructOffset(pLline1, pBufferDis, ref o, ref o);
IPointCollection pCol = pCurve1 as IPointCollection;
IConstructCurve pCurve2 = new PolylineClass();
pCurve2.ConstructOffset(pLline1, -1 * pBufferDis, ref o, ref o);
//把第二次平移的线的所有节点翻转
IPolyline pline2 = pCurve2 as IPolyline;
pline2.ReverseOrientation();
//把第二条的所有节点放到第一条线的IPointCollection里面
IPointCollection pCol2 = pline2 as IPointCollection;
pCol.AddPointCollection(pCol2);
//用面去初始化一个IPointCollection
IPointCollection pPointCol = new PolygonClass();
pPointCol.AddPointCollection(pCol);
//把IPointCollection转换为面
IPolygon pPolygon = pPointCol as IPolygon;
//简化节点次序
pPolygon.SimplifyPreserveFromTo();
return pPolygon;
}
private IPolygon GetMGRSPolygon(IPoint point)
{
CoordinateMGRS mgrs;
IPointCollection pc = new RingClass();
// bottom left
CoordinateMGRS.TryParse(InputCoordinate, out mgrs);
// don't create a polygon for 1m resolution
if (mgrs.Easting.ToString().Length > 4 && mgrs.Northing.ToString().Length > 4)
return null;
var tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
var anotherMGRSstring = mgrs.ToString("", new CoordinateMGRSFormatter());
tempPoint.PutCoordsFromMGRS(anotherMGRSstring, esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// top left
var tempMGRS = new CoordinateMGRS(mgrs.GZD, mgrs.GS, mgrs.Easting, mgrs.Northing);
var tempEasting = mgrs.Easting.ToString().PadRight(5,'0');
tempMGRS.Easting = Convert.ToInt32(tempEasting);
var tempNorthing = mgrs.Northing.ToString().PadRight(5,'9');
tempMGRS.Northing = Convert.ToInt32(tempNorthing.Replace('0','9'));
tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
anotherMGRSstring = tempMGRS.ToString("ZSX00000Y00000", new CoordinateMGRSFormatter());
tempPoint.PutCoordsFromMGRS(anotherMGRSstring, esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// top right
tempEasting = mgrs.Easting.ToString().PadRight(5,'9');
tempMGRS.Easting = Convert.ToInt32(tempEasting.Replace('0', '9'));
tempNorthing = mgrs.Northing.ToString().PadRight(5,'9');
tempMGRS.Northing = Convert.ToInt32(tempNorthing.Replace('0', '9'));
tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
tempPoint.PutCoordsFromMGRS(tempMGRS.ToString("ZSX00000Y00000", new CoordinateMGRSFormatter()), esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// bottom right
tempEasting = mgrs.Easting.ToString().PadRight(5,'9');
tempMGRS.Easting = Convert.ToInt32(tempEasting.Replace('0', '9'));
tempNorthing = mgrs.Northing.ToString().PadRight(5,'0');
tempMGRS.Northing = Convert.ToInt32(tempNorthing);
tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
tempPoint.PutCoordsFromMGRS(tempMGRS.ToString("ZSX00000Y00000", new CoordinateMGRSFormatter()), esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// create polygon
var poly = new PolygonClass();
poly.SpatialReference = GetSR();
poly.AddPointCollection(pc);
poly.Close();
return poly;
}
private IPolygon GetMGRSPolygon(IPoint point)
{
CoordinateMGRS mgrs;
IPointCollection pc = new RingClass();
// bottom left
CoordinateMGRS.TryParse(InputCoordinate, out mgrs);
// don't create a polygon for 1m resolution
if (mgrs.Easting.ToString().Length > 4 && mgrs.Northing.ToString().Length > 4)
{
return(null);
}
var tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
var anotherMGRSstring = mgrs.ToString("", new CoordinateMGRSFormatter());
tempPoint.PutCoordsFromMGRS(anotherMGRSstring, esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// top left
var tempMGRS = new CoordinateMGRS(mgrs.GZD, mgrs.GS, mgrs.Easting, mgrs.Northing);
var tempEasting = mgrs.Easting.ToString().PadRight(5, '0');
tempMGRS.Easting = Convert.ToInt32(tempEasting);
var tempNorthing = mgrs.Northing.ToString().PadRight(5, '9');
tempMGRS.Northing = Convert.ToInt32(tempNorthing.Replace('0', '9'));
tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
anotherMGRSstring = tempMGRS.ToString("ZSX00000Y00000", new CoordinateMGRSFormatter());
tempPoint.PutCoordsFromMGRS(anotherMGRSstring, esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// top right
tempEasting = mgrs.Easting.ToString().PadRight(5, '9');
tempMGRS.Easting = Convert.ToInt32(tempEasting.Replace('0', '9'));
tempNorthing = mgrs.Northing.ToString().PadRight(5, '9');
tempMGRS.Northing = Convert.ToInt32(tempNorthing.Replace('0', '9'));
tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
tempPoint.PutCoordsFromMGRS(tempMGRS.ToString("ZSX00000Y00000", new CoordinateMGRSFormatter()), esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// bottom right
tempEasting = mgrs.Easting.ToString().PadRight(5, '9');
tempMGRS.Easting = Convert.ToInt32(tempEasting.Replace('0', '9'));
tempNorthing = mgrs.Northing.ToString().PadRight(5, '0');
tempMGRS.Northing = Convert.ToInt32(tempNorthing);
tempPoint = new PointClass() as IConversionNotation;
(tempPoint as IPoint).SpatialReference = GetSR();
tempPoint.PutCoordsFromMGRS(tempMGRS.ToString("ZSX00000Y00000", new CoordinateMGRSFormatter()), esriMGRSModeEnum.esriMGRSMode_Automatic);
pc.AddPoint(tempPoint as IPoint);
// create polygon
var poly = new PolygonClass();
poly.SpatialReference = GetSR();
poly.AddPointCollection(pc);
poly.Close();
return(poly);
}
private bool HitFeature()
{
int segmentIndex = 0;
double hitDist = 0;
int part = 0;
bool rightSide = false;
IPointCollection pPointColl_Intersect = new PolygonClass();
IProximityOperator pProximityOp = SnapRefrencePoint as IProximityOperator;
//距离捕捉参考点最近的点（除交点外）
IPoint pClosedPoint = new PointClass();
//获得捕捉参考点缓冲矩形
IEnvelope pEnvelope = GetPointBufferEnvelope(SnapRefrencePoint, SnapMapRadius);
//判断pClosedPoint是否已经被赋了值
bool isSet = false;
//用于计算交点的列表
List <IFeature> list_AllFeatures = new List <IFeature> ();
for (int i = 0; i < m_FeatureCache.Count; i++)
{
IFeature pFeature = m_FeatureCache.get_Feature(i);
//判断IFeature的类型
if (pFeature.Shape.GeometryType != esriGeometryType.esriGeometryPoint &&
pFeature.Shape.GeometryType != esriGeometryType.esriGeometryPolyline &&
pFeature.Shape.GeometryType != esriGeometryType.esriGeometryPolygon)
{
continue;
}
//判断IFeature是否与捕捉点的缓冲区相交
if (pFeature.Shape.Envelope.XMax < pEnvelope.XMin || pFeature.Shape.Envelope.XMin > pEnvelope.XMax ||
pFeature.Shape.Envelope.YMax < pEnvelope.YMin || pFeature.Shape.Envelope.YMin > pEnvelope.YMax)
{
continue;
}
//判断IFeature和捕捉参考点的距离,此处是否应该大于捕捉半径，而不是捕捉半径的平方
if (pProximityOp.ReturnDistance(pFeature.Shape) > SnapMapRadius /** SnapMapRadius */)
{
continue;
}
IHitTest pHitTest = m_FeatureCache.get_Feature(i).Shape as IHitTest;
IPoint[] pResPoint = new IPoint[5];
for (int j = 0; j < 5; j++)
{
pResPoint[j] = new PointClass();
}
#region HitTest捕捉
//捕捉端点
if (IsSnapPortPoint)
{
pHitTest.HitTest(SnapRefrencePoint, SnapMapRadius, esriGeometryHitPartType.esriGeometryPartEndpoint, pResPoint[0], ref hitDist, ref part, ref segmentIndex, ref rightSide);
}
else
{
pResPoint[0] = null;
}
//捕捉中点
if (IsSnapMidPoint)
{
pHitTest.HitTest(SnapRefrencePoint, SnapMapRadius, esriGeometryHitPartType.esriGeometryPartMidpoint, pResPoint[1], ref hitDist, ref part, ref segmentIndex, ref rightSide);
}
else
{
pResPoint[1] = null;
}
//捕捉节点
if (IsSnapNodePoint)
{
pHitTest.HitTest(SnapRefrencePoint, SnapMapRadius, esriGeometryHitPartType.esriGeometryPartVertex, pResPoint[2], ref hitDist, ref part, ref segmentIndex, ref rightSide);
}
else
{
pResPoint[2] = null;
}
//捕捉边上点
if (IsSnapBoundryPoint)
{
pHitTest.HitTest(SnapRefrencePoint, SnapMapRadius, esriGeometryHitPartType.esriGeometryPartBoundary, pResPoint[3], ref hitDist, ref part, ref segmentIndex, ref rightSide);
}
else
{
pResPoint[3] = null;
}
//捕捉中心点
if (IsSnapCenterPoint)
{
pHitTest.HitTest(SnapRefrencePoint, SnapMapRadius, esriGeometryHitPartType.esriGeometryPartCentroid, pResPoint[4], ref hitDist, ref part, ref segmentIndex, ref rightSide);
}
else
{
pResPoint[4] = null;
}
#endregion
//捕捉交点
if (IsSnapIntersectPoint)
{
list_AllFeatures.Add(pFeature);
}
#region 捕捉端点
if (pResPoint[0] != null && pResPoint[0].IsEmpty == false)
{
if (isSet)
{
if (GetDistance(pClosedPoint, SnapRefrencePoint) > GetDistance(SnapRefrencePoint, pResPoint[0]))
{
pClosedPoint = pResPoint[0];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.PortPoint;
// return true;
// }
//}
m_PointType = PointType.PortPoint;
}
}
else
{
pClosedPoint = pResPoint[0];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.PortPoint;
// return true;
// }
//}
isSet = true;
m_PointType = PointType.PortPoint;
}
}
#endregion
#region 捕捉中点
if (pResPoint[1] != null && pResPoint[1].IsEmpty == false)
{
if (isSet)
{
if (GetDistance(pClosedPoint, SnapRefrencePoint) > GetDistance(SnapRefrencePoint, pResPoint[1]))
{
pClosedPoint = pResPoint[1];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.MidPoint;
// return true;
// }
//}
m_PointType = PointType.MidPoint;
}
}
else
{
pClosedPoint = pResPoint[1];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.MidPoint;
// return true;
// }
//}
isSet = true;
m_PointType = PointType.MidPoint;
}
}
#endregion
#region 捕捉节点
if (pResPoint[2] != null && pResPoint[2].IsEmpty == false)
{
if (isSet)
{
if (GetDistance(pClosedPoint, SnapRefrencePoint) > GetDistance(SnapRefrencePoint, pResPoint[2]))
{
pClosedPoint = pResPoint[2];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.VertexPoint;
// return true;
// }
//}
m_PointType = PointType.VertexPoint;
}
}
else
{
pClosedPoint = pResPoint[2];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.VertexPoint;
// return true;
// }
//}
isSet = true;
m_PointType = PointType.VertexPoint;
}
}
#endregion
#region 捕捉边上点
if (pResPoint[3] != null && pResPoint[3].IsEmpty == false)
{
if (isSet)
{
if (GetDistance(pClosedPoint, SnapRefrencePoint) > GetDistance(SnapRefrencePoint, pResPoint[3]))
{
pClosedPoint = pResPoint[3];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.BoundryPoint;
// return true;
// }
//}
m_PointType = PointType.BoundryPoint;
}
}
else
{
pClosedPoint = pResPoint[3];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.BoundryPoint;
// return true;
// }
//}
isSet = true;
m_PointType = PointType.BoundryPoint;
}
}
#endregion
#region 捕捉中心点
if (pResPoint[4] != null && pResPoint[4].IsEmpty == false)
{
if (isSet)
{
if (GetDistance(pClosedPoint, SnapRefrencePoint) > GetDistance(SnapRefrencePoint, pResPoint[4]))
{
pClosedPoint = pResPoint[4];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.CenterPoint;
// return true;
// }
//}
m_PointType = PointType.CenterPoint;
}
}
else
{
pClosedPoint = pResPoint[4];
//在允许误差范围内
//if ( pClosedPoint != null && pClosedPoint.IsEmpty == false )
//{
// if ( GetDistance ( pClosedPoint , SnapRefrencePoint ) < m_IgnoreDistance )
// {
// m_SnapResultPoint = pClosedPoint;
// m_PointType = PointType.CenterPoint;
// return true;
// }
//}
isSet = true;
m_PointType = PointType.CenterPoint;
}
}
#endregion
}
//计算交点集合
if (IsSnapIntersectPoint)
{
while (list_AllFeatures.Count > 0)
{
pPointColl_Intersect.AddPointCollection(GetAllIntersect(list_AllFeatures[0], list_AllFeatures));
list_AllFeatures.RemoveAt(0);
}
}
//得到最近的交点
IPoint pIntersectPoint = GetClosedPoint(pPointColl_Intersect, SnapRefrencePoint);
//比较最近的交点和其他类型点中最近点到参考点的距离
if (pIntersectPoint != null && pIntersectPoint.IsEmpty == false)
{
if (pClosedPoint != null && pClosedPoint.IsEmpty == false)
{
if (GetDistance(pIntersectPoint, SnapRefrencePoint) < GetDistance(pClosedPoint, SnapRefrencePoint))
{
m_SnapResultPoint = pIntersectPoint;
//b_IsHasSnaped = true;
m_PointType = PointType.IntersectPoint;
}
else
{
m_SnapResultPoint = pClosedPoint;
//b_IsHasSnaped = true;
}
}
else
{
m_SnapResultPoint = null;
//b_IsHasSnaped = false;
}
}
else if (pClosedPoint != null && pClosedPoint.IsEmpty == false)
{
m_SnapResultPoint = pClosedPoint;
//b_IsHasSnaped = true;
}
else
{
m_SnapResultPoint = null;
//b_IsHasSnaped = false;
}
return(true);
}
private IPolygon FlatBuffer(IPolyline _pLine, double _pBufferDis)
{
object o = System.Type.Missing;
//分别对输入的线平移两次（正方向和负方向）
IConstructCurve pConCurve = new PolylineClass();
pConCurve.ConstructOffset(_pLine, _pBufferDis, ref o, ref o);
IPointCollection pCol = pConCurve as IPointCollection;
IConstructCurve pCurve = new PolylineClass();
pCurve.ConstructOffset(_pLine, -1 * _pBufferDis, ref o, ref o);
//把第二次平移的线的所有节点翻转
IPolyline addline = pCurve as IPolyline;
addline.ReverseOrientation();
//把第二条的所有节点放到第一条线的IPointCollection里面
IPointCollection pCol2 = addline as IPointCollection;
pCol.AddPointCollection(pCol2);
//用面去初始化一个IPointCollection
IPointCollection myPCol = new PolygonClass();
myPCol.AddPointCollection(pCol);
//把IPointCollection转换为面
IPolygon pPolygon = myPCol as IPolygon;
//简化节点次序
pPolygon.SimplifyPreserveFromTo();
return pPolygon;
}