//根据线的方向获取其更新的位置
private void GetFromPointMovepointChangeLocation(IPolyline line, double distance, ref IPoint point, ref IPolyline retureline)
{
try
{
IPolyline[] pLines = new IPolyline[2];
IPolyline pSplitLine = new PolylineClass();
pSplitLine = line;
IPolyline StarttoPointLine = new PolylineClass();
IPolyline EndtoPointLine = new PolylineClass();
bool splithappened;
int partindex, segmentindex;
object pObject = Type.Missing;
pSplitLine.SplitAtDistance(distance, false, false, out splithappened, out partindex, out segmentindex);
ISegmentCollection lineSegCol = pSplitLine as ISegmentCollection;
ISegmentCollection startSegCol = StarttoPointLine as ISegmentCollection;
ISegmentCollection endSegCol = EndtoPointLine as ISegmentCollection;
for (int i = 0; i < segmentindex; i++)
{
startSegCol.AddSegment(lineSegCol.get_Segment(i), ref pObject, ref pObject);
}
for (int j = segmentindex; j < lineSegCol.SegmentCount; j++)
{
endSegCol.AddSegment(lineSegCol.get_Segment(j), ref pObject, ref pObject);
}
pLines[0] = endSegCol as IPolyline;
pLines[1] = startSegCol as IPolyline;
point = new PointClass();
point = pLines[0].FromPoint;
retureline = pLines[0];
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "/n" + ex.ToString(), "异常");
}
}
public void CanTest2SegmentCircle()
{
IFeatureClass fc = CreateLineClass(_testWs, "CanTest2SegmentCircle");
IFeature row1 = fc.CreateFeature();
IConstructCircularArc arc = new CircularArcClass();
arc.ConstructCircle(GeometryFactory.CreatePoint(0, 0, 0), 3, false);
IPolyline polyline = CreatePolyLine((ISegment)arc);
int segmentIndex;
int newPartIndex;
bool splitHappened;
polyline.SplitAtDistance(0.5, true, false,
out splitHappened,
out newPartIndex,
out segmentIndex);
Assert.True(splitHappened);
row1.Shape = polyline;
row1.Store();
var test = new QaMinSegAngle(fc, 0.1, true);
var runner = new QaContainerTestRunner(1000, test);
runner.Execute();
// assert that two segment closed curve does not always report two
// errors when using linearized segments
Assert.AreEqual(0, runner.Errors.Count);
}
//根据距离切割线段，获取切割的点和切割后尾段
public void GetPointSplitAtDistance(IPolyline InputLine, double distance, ref IPolyline retureLine, ref IPoint returePoint)
{
try
{
IPolyline[] pLines = new IPolyline[2];
IPolyline pSplitLine = new PolylineClass();
pSplitLine = InputLine;
IPolyline StarttoPointLine = new PolylineClass();
IPolyline EndtoPointLine = new PolylineClass();
bool splithappened;
int partindex, segmentindex;
object pObject = Type.Missing;
pSplitLine.SplitAtDistance(distance, false, false, out splithappened, out partindex, out segmentindex);
ISegmentCollection lineSegCol = pSplitLine as ISegmentCollection;
ISegmentCollection startSegCol = StarttoPointLine as ISegmentCollection;
ISegmentCollection endSegCol = EndtoPointLine as ISegmentCollection;
for (int i = 0; i < segmentindex; i++)
{
startSegCol.AddSegment(lineSegCol.get_Segment(i), ref pObject, ref pObject);
}
for (int j = segmentindex; j < lineSegCol.SegmentCount; j++)
{
endSegCol.AddSegment(lineSegCol.get_Segment(j), ref pObject, ref pObject);
}
pLines[0] = endSegCol as IPolyline;
pLines[1] = startSegCol as IPolyline;
returePoint = new PointClass();
bool asRatio = false;
pLines[1].QueryPoint(esriSegmentExtension.esriNoExtension, pLines[1].Length / 2, asRatio, returePoint);
retureLine = pLines[0];
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "\n" + ex.ToString(), "异常");
}
}