private void SetZToZero(IPointCollection4 pCol)
{
for (int i = 0; i < pCol.PointCount; i++)
{
IPoint copyipt = pCol.get_Point(i);
copyipt.Z = 0;
pCol.UpdatePoint(i, copyipt);
}
}
/// <summary>
///
/// </summary>
/// <param name="pCol"></param>
/// <remarks>note that if we set z coordinates, then we may lose many information related to IPolygon
/// (ConnectedComponentBag, InteriorRingBag, ExteriorRingBag, etc.) </remarks>
public static void SetZCoordinates(IPointCollection4 pCol)
{
for (int i = 0; i < pCol.PointCount; i++)
{
IPoint copyipt = pCol.get_Point(i);
copyipt.Z = 0;
pCol.UpdatePoint(i, copyipt);
}
}
public IPointCollection4 modify1VertexOfAPolyline(IGeometryCollection geo, Double searchRadius, Double offsetX, Double offsetY)
{
IPoint queryPoint = m_activePoint;
IPoint hitPoint = new PointClass();
Double hitDistance = 0; Int32 hitPartIndex = 0;
Int32 hitSegmentIndex = 0;
Boolean rightSide = false;
IHitTest hitTest = (IHitTest)geo;
Boolean foundGeometry = hitTest.HitTest(queryPoint, searchRadius, esriGeometryHitPartType.esriGeometryPartVertex, hitPoint, ref hitDistance, ref hitPartIndex, ref hitSegmentIndex, ref rightSide);
if (foundGeometry == true)
{
IGeometry geometry = geo.get_Geometry(hitPartIndex);
IPointCollection4 pointCollection = (IPointCollection4)geometry;
IPoint transformPoint = pointCollection.get_Point(hitSegmentIndex);
ITransform2D transform2D = (ITransform2D)transformPoint;
transform2D.Move(offsetX, offsetY);
pointCollection.UpdatePoint(hitSegmentIndex, transformPoint);
return(pointCollection);
}
return(null);
}
private void DWIntersect(CPolyline pBSCpl, ref List <CPoint> cptlt, double dblIgnorableDis)
{
IPointCollection4 pCol = new PolylineClass();
for (int i = 0; i < cptlt.Count; i++)
{
cptlt[i].SetPoint();
pCol.AddPoint(cptlt[i].pPoint);
}
IPolyline5 ipl = pCol as IPolyline5;
pBSCpl.SetPolyline();
IRelationalOperator pRel = pBSCpl.pPolyline as IRelationalOperator;
bool isCrosses = pRel.Crosses(ipl);
if (isCrosses == true)
{
ITopologicalOperator pTop = pBSCpl.pPolyline as ITopologicalOperator;
IGeometry pGeoIntersect = pTop.Intersect(ipl, esriGeometryDimension.esriGeometry0Dimension);
IPointCollection4 pColIntersect = pGeoIntersect as IPointCollection4;
double dblMaxDis = 0;
for (int j = 0; j < pColIntersect.PointCount; j++)
{
double dblDis = CGeoFunc.CalDistanceFromStartPoint(ipl, pColIntersect.get_Point(j), false);
if (dblDis > dblMaxDis)
{
dblMaxDis = dblDis;
}
}
ICurve pSubCurve;
ipl.GetSubcurve(dblMaxDis, ipl.Length, false, out pSubCurve);
//IPolyline5 Cutipl = pSubCurve as IPolyline5;
IPointCollection4 iplCutCol = pSubCurve as IPointCollection4;
//the new first segment
IPointCollection4 pSegCol = new PolylineClass();
pSegCol.AddPoint(ipl.FromPoint, _Missing, _Missing);
pSegCol.AddPoint(iplCutCol.get_Point(1), _Missing, _Missing);
IPolyline5 seg = pSegCol as IPolyline5;
bool isCrossesSeg;
int intIndex = 0;
while (intIndex < iplCutCol.PointCount - 1)
{
intIndex++;
pSegCol.UpdatePoint(1, iplCutCol.get_Point(intIndex));
isCrossesSeg = pRel.Crosses(seg);
if (isCrossesSeg == false)
{
iplCutCol.RemovePoints(1, intIndex - 1);
iplCutCol.UpdatePoint(0, ipl.FromPoint);
break;
}
if (seg.Length >= dblIgnorableDis)
{
double dblOriginalIntersectionDis = CGeoFunc.CalDistanceFromStartPoint(pBSCpl.pPolyline, pCol.get_Point(0), false);
double dblRealisticIntersectionDis = CGeoFunc.CalDistanceFromStartPoint(pBSCpl.pPolyline, iplCutCol.get_Point(0), false);
IPointCollection4 pColBSCpl = pBSCpl.pPolyline as IPointCollection4;
double dblSumDis = 0;
for (int i = 0; i < pColBSCpl.PointCount - 1; i++)
{
double dblDis = CGeoFunc.CalDis(pColBSCpl.get_Point(i), pColBSCpl.get_Point(i + 1));
dblSumDis += dblDis;
if (dblSumDis >= dblRealisticIntersectionDis)
{
double dblDisPre = Math.Abs(dblSumDis - dblDis - dblOriginalIntersectionDis);
double dblDisNext = Math.Abs(dblSumDis - dblOriginalIntersectionDis);
IPoint intersectpt = new PointClass();
if (dblDisPre <= dblDisNext)
{
intersectpt = pColBSCpl.get_Point(i);
}
else
{
intersectpt = pColBSCpl.get_Point(i + 1);
}
iplCutCol.UpdatePoint(0, intersectpt);
break;
}
}
break;
}
}
cptlt = CHelpFunc.GetCptEbByICol(iplCutCol).ToList();
}
}