protected override Coordinate ExtractOffsetAt(IGeometry linearGeom, Coordinate testPt, double offsetDistance)
{
LocationIndexedLine indexedLine = new LocationIndexedLine(linearGeom);
LinearLocation index = indexedLine.IndexOf(testPt);
return indexedLine.ExtractPoint(index, offsetDistance);
}
public void TestRepeatedCoordsLineString()
{
var line = reader.Read("LINESTRING (10 0, 10 0, 20 0)");
var indexedLine = new LocationIndexedLine(line);
var loc0 = indexedLine.IndexOf(new Coordinate(11, 0));
Assert.IsTrue(loc0.CompareTo(new LinearLocation(1, 0.1)) == 0);
}
public void TestZeroLengthLineString()
{
var line = reader.Read("LINESTRING (10 0, 10 0)");
var indexedLine = new LocationIndexedLine(line);
var loc0 = indexedLine.IndexOf(new Coordinate(11, 0));
Assert.IsTrue(loc0.CompareTo(new LinearLocation(0, Double.NaN)) == 0);
}
public void TestSameSegmentMultiLineString()
{
IGeometry line = reader.Read("MULTILINESTRING ((0 0, 10 0, 20 0), (20 0, 30 0))");
LocationIndexedLine indexedLine = new LocationIndexedLine(line);
LinearLocation loc0 = indexedLine.IndexOf(new Coordinate(0, 0));
LinearLocation loc0_5 = indexedLine.IndexOf(new Coordinate(5, 0));
LinearLocation loc1 = indexedLine.IndexOf(new Coordinate(10, 0));
LinearLocation loc2 = indexedLine.IndexOf(new Coordinate(20, 0));
LinearLocation loc2B = new LinearLocation(1, 0, 0.0);
LinearLocation loc2_5 = indexedLine.IndexOf(new Coordinate(25, 0));
LinearLocation loc3 = indexedLine.IndexOf(new Coordinate(30, 0));
Assert.IsTrue(loc0.IsOnSameSegment(loc0));
Assert.IsTrue(loc0.IsOnSameSegment(loc0_5));
Assert.IsTrue(loc0.IsOnSameSegment(loc1));
Assert.IsTrue(!loc0.IsOnSameSegment(loc2));
Assert.IsTrue(!loc0.IsOnSameSegment(loc2_5));
Assert.IsTrue(!loc0.IsOnSameSegment(loc3));
Assert.IsTrue(loc0_5.IsOnSameSegment(loc0));
Assert.IsTrue(loc0_5.IsOnSameSegment(loc1));
Assert.IsTrue(!loc0_5.IsOnSameSegment(loc2));
Assert.IsTrue(!loc0_5.IsOnSameSegment(loc3));
Assert.IsTrue(!loc2.IsOnSameSegment(loc0));
Assert.IsTrue(loc2.IsOnSameSegment(loc1));
Assert.IsTrue(loc2.IsOnSameSegment(loc2));
Assert.IsTrue(!loc2.IsOnSameSegment(loc3));
Assert.IsTrue(loc2B.IsOnSameSegment(loc3));
Assert.IsTrue(loc2_5.IsOnSameSegment(loc3));
Assert.IsTrue(!loc3.IsOnSameSegment(loc0));
Assert.IsTrue(!loc3.IsOnSameSegment(loc2));
Assert.IsTrue(loc3.IsOnSameSegment(loc2B));
Assert.IsTrue(loc3.IsOnSameSegment(loc2_5));
Assert.IsTrue(loc3.IsOnSameSegment(loc3));
}
protected override bool IndexOfAfterCheck(IGeometry linearGeom, Coordinate testPt)
{
LocationIndexedLine indexedLine = new LocationIndexedLine(linearGeom);
// check locations are consecutive
LinearLocation loc1 = indexedLine.IndexOf(testPt);
LinearLocation loc2 = indexedLine.IndexOfAfter(testPt, loc1);
if (loc2.CompareTo(loc1) <= 0) return false;
// check extracted points are the same as the input
Coordinate pt1 = indexedLine.ExtractPoint(loc1);
Coordinate pt2 = indexedLine.ExtractPoint(loc2);
if (!pt1.Equals2D(testPt)) return false;
if (!pt2.Equals2D(testPt)) return false;
return true;
}
public void TestGetSegmentMultiLineString()
{
IGeometry line = reader.Read("MULTILINESTRING ((0 0, 10 0, 20 0), (20 0, 30 0))");
LocationIndexedLine indexedLine = new LocationIndexedLine(line);
LinearLocation loc0 = indexedLine.IndexOf(new Coordinate(0, 0));
LinearLocation loc0_5 = indexedLine.IndexOf(new Coordinate(5, 0));
LinearLocation loc1 = indexedLine.IndexOf(new Coordinate(10, 0));
LinearLocation loc2 = indexedLine.IndexOf(new Coordinate(20, 0));
LinearLocation loc2B = new LinearLocation(1, 0, 0.0);
LinearLocation loc2_5 = indexedLine.IndexOf(new Coordinate(25, 0));
LinearLocation loc3 = indexedLine.IndexOf(new Coordinate(30, 0));
LineSegment seg0 = new LineSegment(new Coordinate(0, 0), new Coordinate(10, 0));
LineSegment seg1 = new LineSegment(new Coordinate(10, 0), new Coordinate(20, 0));
LineSegment seg2 = new LineSegment(new Coordinate(20, 0), new Coordinate(30, 0));
Assert.IsTrue(loc0.GetSegment(line).Equals(seg0));
Assert.IsTrue(loc0_5.GetSegment(line).Equals(seg0));
Assert.IsTrue(loc1.GetSegment(line).Equals(seg1));
Assert.IsTrue(loc2.GetSegment(line).Equals(seg1));
Assert.IsTrue(loc2_5.GetSegment(line).Equals(seg2));
Assert.IsTrue(loc3.GetSegment(line).Equals(seg2));
}