/// <summary>
/// 通过点集创建线段(IPolyline对象)
/// </summary>
/// <param name="pts"></param>
/// <returns></returns>
public static IPolyline CreatePolyline(IPoint[] pts)
{
var segments = new List <ISegment>();//存放单条线的每一段(Line对象)
for (int i = 0; i < pts.Length - 1; i++)
{
Line line = new LineClass();
line.PutCoords(pts[i], pts[i + 1]);
segments.Add((ISegment)line);
}
ISegment[] segmentArray = segments.ToArray();//存放单条线的每一段(Line对象)
ISegmentCollection segmentCollection = new PolylineClass();
IGeometryBridge geometryBridge = new GeometryEnvironmentClass();
geometryBridge.AddSegments(segmentCollection, ref segmentArray);
IPolyline polyLine = segmentCollection as IPolyline;
return(polyLine);
}
//查询Segment
private void querySegmentsToolStripMenuItem_Click(object sender, EventArgs e)
{
ISegment[] segmentArray = new ISegment[10];
for (int i = 0; i < 10; i++)
{
ILine line = new LineClass();
IPoint fromPoint = new PointClass();
fromPoint.PutCoords(i * 10, i * 10);
IPoint toPoint = new PointClass();
toPoint.PutCoords(i * 15, i * 15);
line.PutCoords(fromPoint, toPoint);
segmentArray[i] = line as ISegment;
}
ISegmentCollection segmentCollection = new PolylineClass();
IGeometryBridge geometryBridge = new GeometryEnvironmentClass();
geometryBridge.AddSegments(segmentCollection, ref segmentArray);
int index = 0;
ISegment[] outputSegmentArray = new ISegment[segmentCollection.SegmentCount - index];
for (int i = 0; i < outputSegmentArray.Length; i++)
{
outputSegmentArray[i] = new LineClass();
}
//查询Segment
geometryBridge.QuerySegments(segmentCollection, index, ref outputSegmentArray);
String report = "";
for (int i = 0; i < outputSegmentArray.Length; i++)
{
ISegment currentSegment = outputSegmentArray[i];
ILine currentLine = currentSegment as ILine;
report = report + "index = " + i + " , FromPoint X = " + currentLine.FromPoint.X +
" , FromPoint Y = " + currentLine.FromPoint.X;
report = report + " , ToPoint X = " + currentLine.ToPoint.X + " , ToPoint Y = " +
currentLine.ToPoint.X + "\n";
}
System.Windows.Forms.MessageBox.Show(report);
}
//创建线对象
private void CreatePolyline()
{
ISegment[] segmentArray = new ISegment[10];
IPolyline polyline = new PolylineClass();
for (int i = 0; i < 10; i++)
{
ILine line = new LineClass();
IPoint fromPoint = new PointClass();
fromPoint.PutCoords(i * 10, i * 10);
IPoint toPoint = new PointClass();
toPoint.PutCoords(i * 15, i * 15);
line.PutCoords(fromPoint, toPoint);
segmentArray[i] = line as ISegment;
}
ISegmentCollection segmentCollection = new PolylineClass();
IGeometryBridge geometryBridge = new GeometryEnvironmentClass();
geometryBridge.AddSegments(segmentCollection, ref segmentArray);
polyline = segmentCollection as IPolyline;
addFeature("polyline", polyline as IGeometry);
this.axMapControl1.Extent = polyline.Envelope;
this.axMapControl1.Refresh();
}
private IGeometry BufferBoundary(IRing currentRing, double bufferDistance, bool draw)
{
ISegmentCollection polyline = new PolylineClass() as ISegmentCollection;
ISegmentCollection ringSegmentCollection = currentRing as ISegmentCollection;
List <ISegment> ringSegments = new List <ISegment>();
for (int i = 0; i < ringSegmentCollection.SegmentCount; i++)
{
ringSegments.Add(ringSegmentCollection.get_Segment(i));
}
ISegment[] ringSegmentsArray = ringSegments.ToArray();
IGeometryBridge geometryBridge = new GeometryEnvironmentClass();
geometryBridge.AddSegments(polyline, ref ringSegmentsArray);
ITopologicalOperator topoBndBuffer = polyline as ITopologicalOperator;
IGeometry bndBuffer = topoBndBuffer.Buffer(bufferDistance);
if (draw)
{
DrawGraphics(bndBuffer);
}
return(bndBuffer);
}
