/// <summary>
/// Performs a brute-force comparison of every segment in each <see cref="ISegmentString" />.
/// This has n^2 performance.
/// </summary>
/// <param name="e0"></param>
/// <param name="e1"></param>
private void ComputeVertexSnaps(INodableSegmentString e0, INodableSegmentString e1)
{
var pts0 = e0.Coordinates;
var pts1 = e1.Coordinates;
for (int i0 = 0; i0 < pts0.Length - 1; i0++)
{
var hotPixel = new HotPixel(pts0[i0], _scaleFactor);
for (int i1 = 0; i1 < pts1.Length - 1; i1++)
{
// don't snap a vertex to itself
if (e0 == e1)
{
if (i0 == i1)
{
continue;
}
}
bool isNodeAdded = //AddSnappedNode(hotPixel, e1, i1);
hotPixel.AddSnappedNode(e1, i1);
// if a node is created for a vertex, that vertex must be noded too
if (isNodeAdded)
{
e0.AddIntersection(pts0[i0], i0);
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SegmentNode"/> class.
/// </summary>
/// <param name="segString"></param>
/// <param name="coord"></param>
/// <param name="segmentIndex"></param>
/// <param name="segmentOctant"></param>
public SegmentNode(INodableSegmentString segString, Coordinate coord, int segmentIndex, Octants segmentOctant)
{
Coord = null;
_segString = segString;
Coord = new Coordinate(coord.X, coord.Y, coord.Z);
SegmentIndex = segmentIndex;
_segmentOctant = segmentOctant;
_isInterior = !coord.Equals2D(segString.Coordinates[segmentIndex]);
}
/// <summary>
/// Initializes a new instance of the <see cref="SegmentNode"/> class.
/// </summary>
/// <param name="segString"></param>
/// <param name="coord"></param>
/// <param name="segmentIndex"></param>
/// <param name="segmentOctant"></param>
public SegmentNode(INodableSegmentString segString, Coordinate coord, int segmentIndex, Octants segmentOctant)
{
Coord = null;
_segString = segString;
Coord = new Coordinate(coord.X, coord.Y, coord.Z);
SegmentIndex = segmentIndex;
_segmentOctant = segmentOctant;
_isInterior = !coord.Equals2D(segString.Coordinates[segmentIndex]);
}
/// <summary>
///
/// </summary>
/// <param name="ss"></param>
/// <param name="snapPts"></param>
private void ComputeSnaps(INodableSegmentString ss, IEnumerable <Coordinate> snapPts)
{
foreach (Coordinate snapPt in snapPts)
{
HotPixel hotPixel = new HotPixel(snapPt, _scaleFactor, _li);
for (int i = 0; i < ss.Count - 1; i++)
{
//AddSnappedNode(hotPixel, ss, i);
hotPixel.AddSnappedNode(ss, i);
}
}
}
/// <summary>
/// Snaps segments to the vertices of a Segment String.
/// </summary>
/// <param name="e"></param>
private void ComputeVertexSnaps(INodableSegmentString e)
{
var pts0 = e.Coordinates;
for (var i = 0; i < pts0.Length; i++)
{
var hotPixel = new HotPixel(pts0[i], _scaleFactor, _li);
var isNodeAdded = _pointSnapper.Snap(hotPixel, e, i);
// if a node is created for a vertex, that vertex must be noded too
if (isNodeAdded)
{
e.AddIntersection(pts0[i], i);
}
}
}
/// <summary>
/// Adds a new node (equal to the snap pt) to the specified segment
/// if the segment passes through the hot pixel
/// </summary>
/// <param name="segStr"></param>
/// <param name="segIndex"></param>
/// <returns><c>true</c> if a node was added to the segment</returns>
public bool AddSnappedNode(INodableSegmentString segStr, int segIndex)
{
var coords = segStr.Coordinates;
var p0 = coords[segIndex];
var p1 = coords[segIndex + 1];
if (Intersects(p0, p1))
{
//System.out.println("snapped: " + snapPt);
//System.out.println("POINT (" + snapPt.x + " " + snapPt.y + ")");
segStr.AddIntersection(Coordinate, segIndex);
return(true);
}
return(false);
}
/// <summary>
/// Snaps segments to the vertices of a Segment String.
/// </summary>
/// <param name="e"></param>
private void ComputeVertexSnaps(INodableSegmentString e)
{
var pts0 = e.Coordinates;
for (var i = 0; i < pts0.Length; i++)
{
var hotPixel = new HotPixel(pts0[i], _scaleFactor, _li);
var isNodeAdded = _pointSnapper.Snap(hotPixel, e, i);
// if a node is created for a vertex, that vertex must be noded too
if (isNodeAdded)
e.AddIntersection(pts0[i], i);
}
}
/// <summary>
/// Performs a brute-force comparison of every segment in each <see cref="ISegmentString" />.
/// This has n^2 performance.
/// </summary>
/// <param name="e0"></param>
/// <param name="e1"></param>
private void ComputeVertexSnaps(INodableSegmentString e0, INodableSegmentString e1)
{
Coordinate[] pts0 = e0.Coordinates;
Coordinate[] pts1 = e1.Coordinates;
for (int i0 = 0; i0 < pts0.Length - 1; i0++)
{
HotPixel hotPixel = new HotPixel(pts0[i0], _scaleFactor, _li);
for (int i1 = 0; i1 < pts1.Length - 1; i1++)
{
// don't snap a vertex to itself
if (e0 == e1)
if (i0 == i1)
continue;
bool isNodeAdded = //AddSnappedNode(hotPixel, e1, i1);
hotPixel.AddSnappedNode(e1, i1);
// if a node is created for a vertex, that vertex must be noded too
if (isNodeAdded)
e0.AddIntersection(pts0[i0], i0);
}
}
}
/// <summary>
///
/// </summary>
/// <param name="ss"></param>
/// <param name="snapPts"></param>
private void ComputeSnaps(INodableSegmentString ss, IEnumerable<Coordinate> snapPts)
{
foreach (Coordinate snapPt in snapPts)
{
HotPixel hotPixel = new HotPixel(snapPt, _scaleFactor, _li);
for (int i = 0; i < ss.Count - 1; i++)
//AddSnappedNode(hotPixel, ss, i);
hotPixel.AddSnappedNode(ss, i);
}
}
///<summary>
/// Adds a new node (equal to the snap pt) to the specified segment
/// if the segment passes through the hot pixel
///</summary>
/// <param name="segStr"></param>
/// <param name="segIndex"></param>
/// <returns><c>true</c> if a node was added to the segment</returns>
public bool AddSnappedNode(INodableSegmentString segStr, int segIndex)
{
var coords = segStr.Coordinates;
var p0 = coords[segIndex];
var p1 = coords[segIndex + 1];
if (Intersects(p0, p1))
{
//System.out.println("snapped: " + snapPt);
//System.out.println("POINT (" + snapPt.x + " " + snapPt.y + ")");
segStr.AddIntersection(Coordinate, segIndex);
return true;
}
return false;
}
