public void GetLine()
{
XYPolyline xyPolyline = new XYPolyline();
xyPolyline.Points.Add(new XYPoint(6,2));
xyPolyline.Points.Add(new XYPoint(2,2));
xyPolyline.Points.Add(new XYPoint(8,2));
xyPolyline.Points.Add(new XYPoint(8,4));
xyPolyline.Points.Add(new XYPoint(5,4));
xyPolyline.Points.Add(new XYPoint(9,7));
Assert.AreEqual(new XYLine(6,2,2,2),xyPolyline.GetLine(0));
Assert.AreEqual(new XYLine(2,2,8,2),xyPolyline.GetLine(1));
Assert.AreEqual(new XYLine(8,2,8,4),xyPolyline.GetLine(2));
Assert.AreEqual(new XYLine(8,4,5,4),xyPolyline.GetLine(3));
Assert.AreEqual(new XYLine(5,4,9,7),xyPolyline.GetLine(4));
}
/// <summary>
/// Finds the shortest distance between any line segment of the polyline
/// and the point.
/// </summary>
/// <param name="polyLine">PolyLine.</param>
/// <param name="point">Point</param>
/// <returns>
/// <p>Length of the shortest path between the polyline and the point.</p>
/// </returns>
public static double CalculatePolylineToPointDistance(XYPolyline polyLine, IXYPoint point)
{
double dist = 0;
int i = 0;
while (i < polyLine.Points.Count - 1)
{
if (i == 0)
{
dist = CalculateLineToPointDistance(polyLine.GetLine(0), point);
}
else
{
dist = Math.Min(dist, CalculateLineToPointDistance(polyLine.GetLine(i), point));
}
i++;
}
return(dist);
}
/// <summary>
/// Calculates the length of polyline inside polygon. Lines segments on the edges of
/// polygons are included with half their length.
/// </summary>
/// <param name="polyline">Polyline</param>
/// <param name="polygon">Polygon</param>
/// <returns>
/// Length of polyline inside polygon.
/// </returns>
public static double CalculateLengthOfPolylineInsidePolygon(XYPolyline polyline, XYPolygon polygon)
{
double lengthInside = 0;
int numberOfLineSegments = polyline.Points.Count - 1;
for (int i = 0; i < numberOfLineSegments; i++)
{
XYLine line = new XYLine(polyline.GetLine(i));
lengthInside += CalculateLengthOfLineInsidePolygon(line, polygon);
}
return(lengthInside);
}
/// <summary>
/// Does the same as CalculatePolylineToPointDistance but also returns the line number
/// </summary>
/// <param name="polyLine"></param>
/// <param name="point"></param>
/// <returns></returns>
public static Tuple<int, double> GetClosetLine (XYPolyline polyLine, IXYPoint point)
{
double dist = double.MaxValue;
int i = 0;
int mini=0;
while (i < polyLine.Points.Count - 1)
{
var newdist = CalculateLineToPointDistance(polyLine.GetLine(i), point);
if(newdist<dist)
{
dist=newdist;
mini =i;
}
i++;
}
return new Tuple<int, double>(mini, dist);
}
/// <summary>
/// Finds the shortest distance between any line segment of the polyline
/// and the point.
/// </summary>
/// <param name="polyLine">PolyLine.</param>
/// <param name="point">Point</param>
/// <returns>
/// <p>Length of the shortest path between the polyline and the point.</p>
/// </returns>
public static double CalculatePolylineToPointDistance (XYPolyline polyLine, IXYPoint point)
{
double dist = 0;
int i = 0;
while (i < polyLine.Points.Count - 1)
{
if (i == 0)
{
dist = CalculateLineToPointDistance (polyLine.GetLine(0), point);
}
else
{
dist = Math.Min(dist, CalculateLineToPointDistance (polyLine.GetLine(i), point));
}
i++;
}
return dist;
}
/// <summary>
/// Calculates the length of polyline inside polygon. Lines segments on the edges of
/// polygons are included with half their length.
/// </summary>
/// <param name="polyline">Polyline</param>
/// <param name="polygon">Polygon</param>
/// <returns>
/// Length of polyline inside polygon.
/// </returns>
public static double CalculateLengthOfPolylineInsidePolygon(XYPolyline polyline, XYPolygon polygon)
{
double lengthInside = 0;
int numberOfLineSegments = polyline.Points.Count - 1;
for (int i = 0; i < numberOfLineSegments; i++)
{
XYLine line = new XYLine(polyline.GetLine(i));
lengthInside += CalculateLengthOfLineInsidePolygon(line,polygon);
}
return lengthInside;
}
