public void BBoxCornersReturnsCorners()
{
BBox target = new BBox() { North = 10, South = 8, East = 9, West = 7 };
PointGeo corner1 = new PointGeo(10, 9);
PointGeo corner2 = new PointGeo(10, 7);
PointGeo corner3 = new PointGeo(8, 9);
PointGeo corner4 = new PointGeo(8, 7);
Assert.Contains(corner1, target.Corners);
Assert.Contains(corner2, target.Corners);
Assert.Contains(corner3, target.Corners);
Assert.Contains(corner4, target.Corners);
}
public void BBoxConstructorIEnumerableSetsBound()
{
PointGeo p1 = new PointGeo(15, 10, -100);
PointGeo p2 = new PointGeo(-15, -10, 1000);
BBox target = new BBox(new IPointGeo[] { p1, p2 });
Assert.Equal(15, target.North);
Assert.Equal(-15, target.South);
Assert.Equal(10, target.East);
Assert.Equal(-10, target.West);
Assert.Equal(-100, target.MinElevation);
Assert.Equal(1000, target.MaxElevation);
}
public void BBoxExtendToCoverInflatesBBox()
{
PointGeo p1 = new PointGeo(12.1, 18.3, 100);
PointGeo p2 = new PointGeo(-12.9, -34.3, 500);
BBox target = new BBox();
target.ExtendToCover(p1);
target.ExtendToCover(p2);
Assert.Equal(12.1, target.North);
Assert.Equal(-12.9, target.South);
Assert.Equal(18.3, target.East);
Assert.Equal(-34.3, target.West);
Assert.Equal(100, target.MinElevation);
Assert.Equal(500, target.MaxElevation);
}
/// <summary>
/// Finds all candidates points for given GPS track point
/// </summary>
/// <param name="gpxPt">GPS point</param>
/// <returns>Collection of points candidate points on road segments</returns>
public IEnumerable<CandidatePoint> FindCandidatePoints(GPXPoint gpxPt)
{
List<CandidatePoint> result = new List<CandidatePoint>();
BBox gpxBbox = new BBox(new IPointGeo[] { gpxPt });
gpxBbox.Inflate(0.0007, 0.0011);
foreach (var road in _trackCutout) {
if (Topology.Intersects(gpxBbox, road.BBox)) {
Segment<IPointGeo> roadSegment;
IPointGeo projectedPoint = Topology.ProjectPoint(gpxPt, road, out roadSegment);
result.Add(new CandidatePoint() { MapPoint = projectedPoint,
Road = road, RoadSegment = roadSegment,
ObservationProbability = CalculateObservationProbability(gpxPt, projectedPoint) });
}
}
if (result.Count == 0) {
throw new Exception(string.Format("Can not find any candidate point for {0}", gpxPt));
}
return result;
}
void CreateTrackCutout(GPXTrackSegment track)
{
_trackCutout.Clear();
BBox trackBBox = new BBox();
foreach (var point in track.Nodes) {
trackBBox.ExtendToCover(point);
}
trackBBox.Inflate(0.0015, 0.0015);
foreach (var road in _graph.ConnectionGeometries) {
if (Topology.Intersects(road.BBox, trackBBox)) {
_trackCutout.Add(road);
}
}
}
/// <summary>
/// Tests whether two BBoxes have non-empty intersection
/// </summary>
/// <param name="bbox1">First BBox</param>
/// <param name="bbox2">Second BBox</param>
/// <returns>true if bbox have non-empty intersection, otherwise returns false</returns>
public static bool Intersects(BBox bbox1, BBox bbox2)
{
return !(bbox2.West > bbox1.East || bbox2.East < bbox1.West || bbox2.South > bbox1.North || bbox2.North < bbox1.South);
}
public void BBoxInflateIncreasesBBoxSize()
{
PointGeo p1 = new PointGeo(1, 0);
PointGeo p2 = new PointGeo(0, 1);
BBox target = new BBox(new IPointGeo[] { p1, p2 });
target.Inflate(0.1, 0.2);
Assert.Equal(1.1, target.North);
Assert.Equal(-0.1, target.South);
Assert.Equal(1.2, target.East);
Assert.Equal(-0.2, target.West);
}
public void BBoxIsInsideReturnsTrueForPointOnBoundary()
{
PointGeo p1 = new PointGeo(15, 10, -100);
PointGeo p2 = new PointGeo(-15, -10, 1000);
PointGeo pTestLat = new PointGeo(15, 0, 0);
PointGeo pTestLat2 = new PointGeo(-15, 0, 0);
PointGeo pTestLon = new PointGeo(0, 10, 0);
PointGeo pTestLon2 = new PointGeo(0, -10, 0);
PointGeo pTestEle = new PointGeo(0, 0, -100);
PointGeo pTestEle2 = new PointGeo(0, 0, 1000);
BBox target = new BBox(new IPointGeo[] { p1, p2 });
Assert.True(target.IsInside(pTestLat), "Latitude");
Assert.True(target.IsInside(pTestLon), "Longitude");
Assert.True(target.IsInside(pTestEle), "Elevation");
Assert.True(target.IsInside(pTestLat2), "Latitude");
Assert.True(target.IsInside(pTestLon2), "Longitude");
Assert.True(target.IsInside(pTestEle2), "Elevation");
}
public void BBoxIsInsideReturnsTrueIfPointIsInside()
{
PointGeo p1 = new PointGeo(15, 10, -100);
PointGeo p2 = new PointGeo(-15, -10, 1000);
PointGeo pTest = new PointGeo(0, 0, 0);
BBox target = new BBox(new IPointGeo[] { p1, p2 });
Assert.True(target.IsInside(pTest));
}
public void BBoxIsInsideReturnsFalseIfPointIsOutside()
{
PointGeo p1 = new PointGeo(15, 10, -100);
PointGeo p2 = new PointGeo(-15, -10, 1000);
PointGeo pTestLat = new PointGeo(30, 0, 0);
PointGeo pTestLon = new PointGeo(0, 30, 0);
PointGeo pTestEle = new PointGeo(30, 0, 5000);
BBox target = new BBox(new IPointGeo[] { p1, p2 });
Assert.False(target.IsInside(pTestLat), "Latitude");
Assert.False(target.IsInside(pTestLon), "Longitude");
Assert.False(target.IsInside(pTestEle), "Elevation");
}
public void IntersectsReturnsTrueForIntersectingBBoxesCrossShape()
{
// ___
// | |
// _|___|__
// |_|___|__|
// |___|
BBox bbox1 = new BBox() { North = 4, South = 0, East = 3, West = 1};
BBox bbox2 = new BBox() { North = 2, South = 1, East = 4, West = 0};
Assert.True(Topology.Intersects(bbox1, bbox2));
Assert.True(Topology.Intersects(bbox2, bbox1));
}
public void IntersectsReturnsTrueForIntercestiongBBoxes()
{
BBox bbox1 = new BBox() { North = 1, South = -1, East = 1, West = -1 };
BBox bbox2 = new BBox() { North = 1.5, South = 0.5, East = 1.5, West = 0.5 };
Assert.True(Topology.Intersects(bbox1, bbox2));
Assert.True(Topology.Intersects(bbox2, bbox1));
}
public void IntersectsReturnsTrueForBBoxInsideLargerOne()
{
BBox large = new BBox() { North = 1, South = -1, East = 1, West = -1 };
BBox small = new BBox() { North = 0.5, South = -0.5, East = 0.5, West = -0.5 };
Assert.True(Topology.Intersects(large, small));
Assert.True(Topology.Intersects(small, large));
}
public void IntersectsReturnsFalseForNonIntercestiongBBoxes()
{
BBox bbox1 = new BBox() { North = 1, South = -1, East = 1, West = -1 };
BBox bbox2 = new BBox() { North = 1.5, South = 1.1, East = 1.5, West = 1.1 };
Assert.False(Topology.Intersects(bbox1, bbox2));
Assert.False(Topology.Intersects(bbox2, bbox1));
}
