/// <summary>
/// Returns the boolean result (e.g. union) of 2 shapes. Boolean Operation defined by
/// the inside / outside flags.
/// </summary>
/// <param name="Other">Other polygon.</param>
/// <param name="HoledPolys">Set of polygons to recieve the result.</param>
/// <param name="bThisInside">Does the operation require elements of this INSIDE the other.</param>
/// <param name="bOtherInside">Does the operation require elements of the other INSIDE this.</param>
/// <param name="grid">The grid with the degenerate settings.</param>
public void GetBoolean(C2DHoledPolyBase Other, List<C2DHoledPolyBase> HoledPolys,
bool bThisInside, bool bOtherInside,
CGrid grid)
{
if (_Rim.Lines.Count == 0 || Other.Rim.Lines.Count == 0)
return;
if (_Rim.BoundingRect.Overlaps(Other.Rim.BoundingRect))
{
switch (grid.DegenerateHandling)
{
case CGrid.eDegenerateHandling.None:
{
List<C2DPolyBase> CompleteHoles1 = new List<C2DPolyBase>();
List<C2DPolyBase> CompleteHoles2 = new List<C2DPolyBase>();
C2DLineBaseSetSet Routes1 = new C2DLineBaseSetSet();
C2DLineBaseSetSet Routes2 = new C2DLineBaseSetSet();
GetRoutes( this, bThisInside, Other, bOtherInside, Routes1, Routes2,
CompleteHoles1, CompleteHoles2, grid);
Routes1.ExtractAllOf(Routes2);
if (Routes1.Count > 0)
{
Routes1.MergeJoining();
List<C2DPolyBase> Polygons = new List<C2DPolyBase>();
for (int i = Routes1.Count - 1; i >= 0; i--)
{
C2DLineBaseSet pRoute = Routes1[i];
if (pRoute.IsClosed(true) )
{
Polygons.Add(new C2DPolyBase());
Polygons[Polygons.Count - 1].CreateDirect(pRoute);
}
else
{
// Debug.Assert(false);
grid.LogDegenerateError();
}
}
C2DHoledPolyBaseSet NewComPolys = new C2DHoledPolyBaseSet();
PolygonsToHoledPolygons(NewComPolys, Polygons);
NewComPolys.AddKnownHoles( CompleteHoles1 );
NewComPolys.AddKnownHoles( CompleteHoles2 );
if ( !bThisInside && !bOtherInside && NewComPolys.Count != 1)
{
// Debug.Assert(false);
grid.LogDegenerateError();
}
HoledPolys.AddRange(NewComPolys);
NewComPolys.Clear();
}
}
break;
case CGrid.eDegenerateHandling.RandomPerturbation:
{
C2DHoledPolyBase OtherCopy = new C2DHoledPolyBase(Other);
OtherCopy.RandomPerturb();
grid.DegenerateHandling = CGrid.eDegenerateHandling.None;
GetBoolean( OtherCopy, HoledPolys, bThisInside, bOtherInside , grid );
grid.DegenerateHandling = CGrid.eDegenerateHandling.RandomPerturbation;
}
break;
case CGrid.eDegenerateHandling.DynamicGrid:
{
C2DRect Rect = new C2DRect();
if (_Rim.BoundingRect.Overlaps(Other.Rim.BoundingRect, Rect))
{
//double dOldGrid = CGrid::GetGridSize();
grid.SetToMinGridSize(Rect, false);
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGrid;
GetBoolean( Other, HoledPolys, bThisInside, bOtherInside , grid );
grid.DegenerateHandling = CGrid.eDegenerateHandling.DynamicGrid;
}
}
break;
case CGrid.eDegenerateHandling.PreDefinedGrid:
{
C2DHoledPolyBase P1 = new C2DHoledPolyBase(this);
C2DHoledPolyBase P2 = new C2DHoledPolyBase(Other);
P1.SnapToGrid(grid);
P2.SnapToGrid(grid);
C2DVector V1 = new C2DVector( P1.Rim.BoundingRect.TopLeft, P2.Rim.BoundingRect.TopLeft);
double dPerturbation = grid.GridSize; // ensure it snaps back to original grid positions.
if (V1.i > 0)
V1.i = dPerturbation;
else
V1.i = -dPerturbation; // move away slightly if possible
if (V1.j > 0)
V1.j = dPerturbation;
else
V1.j = -dPerturbation; // move away slightly if possible
V1.i *= 0.411923;// ensure it snaps back to original grid positions.
V1.j *= 0.313131;// ensure it snaps back to original grid positions.
P2.Move( V1 );
grid.DegenerateHandling = CGrid.eDegenerateHandling.None;
P1.GetBoolean( P2, HoledPolys, bThisInside, bOtherInside , grid );
for (int i = 0 ; i < HoledPolys.Count ; i++)
HoledPolys[i].SnapToGrid(grid);
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGrid;
}
break;
case CGrid.eDegenerateHandling.PreDefinedGridPreSnapped:
{
C2DHoledPolyBase P2 = new C2DHoledPolyBase(Other);
C2DVector V1 = new C2DVector(_Rim.BoundingRect.TopLeft, P2.Rim.BoundingRect.TopLeft);
double dPerturbation = grid.GridSize;
if (V1.i > 0)
V1.i = dPerturbation;
else
V1.i = -dPerturbation; // move away slightly if possible
if (V1.j > 0)
V1.j = dPerturbation;
else
V1.j = -dPerturbation; // move away slightly if possible
V1.i *= 0.411923; // ensure it snaps back to original grid positions.
V1.j *= 0.313131;// ensure it snaps back to original grid positions.
P2.Move( V1 );
grid.DegenerateHandling = CGrid.eDegenerateHandling.None;
GetBoolean(P2, HoledPolys, bThisInside, bOtherInside, grid);
for (int i = 0; i < HoledPolys.Count; i++)
HoledPolys[i].SnapToGrid(grid);
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGridPreSnapped;
}
break;
}// switch
}
}
/// <summary>
/// Returns the routes (multiple lines or part polygons) either inside or
/// outside the polygons provided. These are based on the intersections
/// of the 2 polygons e.g. the routes / part polygons of one inside or
/// outside the other.
/// </summary>
/// <param name="Poly1">The first polygon.</param>
/// <param name="bP1RoutesInside">True if routes inside the second polygon are
/// required for the first polygon.</param>
/// <param name="Poly2">The second polygon.</param>
/// <param name="bP2RoutesInside">True if routes inside the first polygon are
/// required for the second polygon.</param>
/// <param name="Routes1">Output. Set of lines for the first polygon.</param>
/// <param name="Routes2">Output. Set of lines for the second polygon.</param>
/// <param name="CompleteHoles1">Output. Complete holes for the first polygon.</param>
/// <param name="CompleteHoles2">Output. Complete holes for the second polygon.</param>
/// <param name="grid">Contains the degenerate handling settings.</param>
public static void GetRoutes(C2DHoledPolyBase Poly1, bool bP1RoutesInside,
C2DHoledPolyBase Poly2, bool bP2RoutesInside,
C2DLineBaseSetSet Routes1, C2DLineBaseSetSet Routes2,
List<C2DPolyBase> CompleteHoles1, List<C2DPolyBase> CompleteHoles2,
CGrid grid)
{
if (Poly1.Rim.Lines.Count == 0 || Poly2.Rim.Lines.Count == 0)
{
Debug.Assert(false, "Polygon with no lines" );
return;
}
C2DPointSet IntPointsTemp = new C2DPointSet();
C2DPointSet IntPointsRim1 = new C2DPointSet();
C2DPointSet IntPointsRim2 = new C2DPointSet();
List<int> IndexesRim1 = new List<int>();
List<int> IndexesRim2 = new List<int>();
List<C2DPointSet> IntPoints1AllHoles = new List<C2DPointSet>();
List<C2DPointSet> IntPoints2AllHoles = new List<C2DPointSet>();
List<List<int>> Indexes1AllHoles = new List<List<int>>();
List<List<int>> Indexes2AllHoles = new List<List<int>>();
// std::vector<C2DPointSet* > IntPoints1AllHoles, IntPoints2AllHoles;
// std::vector<CIndexSet*> Indexes1AllHoles, Indexes2AllHoles;
int usP1Holes = Poly1.HoleCount;
int usP2Holes = Poly2.HoleCount;
// *** Rim Rim Intersections
Poly1.Rim.Lines.GetIntersections( Poly2.Rim.Lines,
IntPointsTemp, IndexesRim1, IndexesRim2,
Poly1.Rim.BoundingRect, Poly2.Rim.BoundingRect );
IntPointsRim1.AddCopy( IntPointsTemp );
IntPointsRim2.ExtractAllOf(IntPointsTemp);
// *** Rim Hole Intersections
for ( int i = 0 ; i < usP2Holes; i++)
{
Debug.Assert(IntPointsTemp.Count == 0);
IntPoints2AllHoles.Add(new C2DPointSet());
Indexes2AllHoles.Add( new List<int>() );
if (Poly1.Rim.BoundingRect.Overlaps( Poly2.GetHole(i).BoundingRect ))
{
Poly1.Rim.Lines.GetIntersections( Poly2.GetHole(i).Lines,
IntPointsTemp, IndexesRim1, Indexes2AllHoles[i],
Poly1.Rim.BoundingRect, Poly2.GetHole(i).BoundingRect);
IntPointsRim1.AddCopy( IntPointsTemp);
IntPoints2AllHoles[i].ExtractAllOf(IntPointsTemp);
}
}
// *** Rim Hole Intersections
for ( int j = 0 ; j < usP1Holes; j++)
{
Debug.Assert(IntPointsTemp.Count == 0);
IntPoints1AllHoles.Add( new C2DPointSet());
Indexes1AllHoles.Add( new List<int>());
if (Poly2.Rim.BoundingRect.Overlaps(Poly1.GetHole(j).BoundingRect))
{
Poly2.Rim.Lines.GetIntersections( Poly1.GetHole(j).Lines,
IntPointsTemp, IndexesRim2, Indexes1AllHoles[j],
Poly2.Rim.BoundingRect, Poly1.GetHole(j).BoundingRect);
IntPointsRim2.AddCopy( IntPointsTemp);
IntPoints1AllHoles[j].ExtractAllOf(IntPointsTemp);
}
}
// *** Quick Escape
bool bRim1StartInPoly2 = Poly2.Contains( Poly1.Rim.Lines[0].GetPointFrom() );
bool bRim2StartInPoly1 = Poly1.Contains( Poly2.Rim.Lines[0].GetPointFrom() );
if (IntPointsRim1.Count != 0 || IntPointsRim2.Count != 0 ||
bRim1StartInPoly2 || bRim2StartInPoly1 )
// pos no interaction
{
// *** Rim Routes
Poly1.Rim.GetRoutes( IntPointsRim1, IndexesRim1, Routes1,
bRim1StartInPoly2, bP1RoutesInside);
Poly2.Rim.GetRoutes( IntPointsRim2, IndexesRim2, Routes2,
bRim2StartInPoly1, bP2RoutesInside);
if( IntPointsRim1.Count % 2 != 0) // Must be even
{
grid.LogDegenerateError();
// Debug.Assert(false);
}
if( IntPointsRim2.Count % 2 != 0) // Must be even
{
grid.LogDegenerateError();
// Debug.Assert(false);
}
// *** Hole Hole Intersections
for (int h = 0 ; h < usP1Holes; h++)
{
for ( int k = 0 ; k < usP2Holes; k++)
{
Debug.Assert(IntPointsTemp.Count == 0);
C2DPolyBase pHole1 = Poly1.GetHole(h);
C2DPolyBase pHole2 = Poly2.GetHole(k);
if ( pHole1.BoundingRect.Overlaps( pHole2.BoundingRect) )
{
pHole1.Lines.GetIntersections( pHole2.Lines,
IntPointsTemp, Indexes1AllHoles[h], Indexes2AllHoles[k],
pHole1.BoundingRect, pHole2.BoundingRect);
IntPoints1AllHoles[h].AddCopy( IntPointsTemp);
IntPoints2AllHoles[k].ExtractAllOf(IntPointsTemp);
}
}
}
// *** Hole Routes
for (int a = 0 ; a < usP1Holes; a++)
{
C2DPolyBase pHole = Poly1.GetHole(a);
if ( IntPoints1AllHoles[a].Count % 2 != 0) // Must be even
{
grid.LogDegenerateError();
// Debug.Assert(false);
}
if (pHole.Lines.Count != 0)
{
bool bHole1StartInside = Poly2.Contains( pHole.Lines[0].GetPointFrom() );
if ( IntPoints1AllHoles[a].Count == 0)
{
if ( bHole1StartInside == bP1RoutesInside)
CompleteHoles1.Add( new C2DPolyBase(pHole) );
}
else
{
pHole.GetRoutes( IntPoints1AllHoles[a], Indexes1AllHoles[a], Routes1,
bHole1StartInside, bP1RoutesInside);
}
}
}
// *** Hole Routes
for (int b = 0 ; b < usP2Holes; b++)
{
C2DPolyBase pHole = Poly2.GetHole(b);
if ( IntPoints2AllHoles[b].Count % 2 != 0) // Must be even
{
grid.LogDegenerateError();
// Debug.Assert(false);
}
if (pHole.Lines.Count != 0)
{
bool bHole2StartInside = Poly1.Contains( pHole.Lines[0].GetPointFrom() );
if ( IntPoints2AllHoles[b].Count == 0)
{
if ( bHole2StartInside == bP2RoutesInside)
CompleteHoles2.Add( new C2DPolyBase( pHole) );
}
else
{
pHole.GetRoutes( IntPoints2AllHoles[b], Indexes2AllHoles[b], Routes2,
bHole2StartInside, bP2RoutesInside);
}
}
}
}
//for (unsigned int i = 0 ; i < IntPoints1AllHoles.size(); i++)
// delete IntPoints1AllHoles[i];
//for (unsigned int i = 0 ; i < IntPoints2AllHoles.size(); i++)
// delete IntPoints2AllHoles[i];
//for (unsigned int i = 0 ; i < Indexes1AllHoles.size(); i++)
// delete Indexes1AllHoles[i];
//for (unsigned int i = 0 ; i < Indexes2AllHoles.size(); i++)
// delete Indexes2AllHoles[i];
}
/// <summary>
/// Gets the boolean operation with the other. e.g. union / intersection.
/// </summary>
/// <param name="Other">The other polygon.</param>
/// <param name="HoledPolys">The set to recieve the result.</param>
/// <param name="bThisInside">The flag to indicate routes inside.</param>
/// <param name="bOtherInside">The flag to indicate routes inside for the other.</param>
/// <param name="grid">The degenerate settings.</param>
public void GetBoolean(C2DPolyBase Other, List<C2DHoledPolyBase> HoledPolys,
bool bThisInside, bool bOtherInside,
CGrid grid)
{
if (BoundingRect.Overlaps(Other.BoundingRect ))
{
switch (grid.DegenerateHandling)
{
case CGrid.eDegenerateHandling.None:
{
C2DLineBaseSetSet Routes1 = new C2DLineBaseSetSet();
C2DLineBaseSetSet Routes2 = new C2DLineBaseSetSet();
C2DPolyBase.GetRoutes( this, bThisInside, Other, bOtherInside, Routes1, Routes2);
Routes1.ExtractAllOf(Routes2);
if (Routes1.Count > 0)
{
// Add all the joining routes together to form closed routes
Routes1.MergeJoining();
// Set up some temporary polygons.
List<C2DPolyBase> Polygons = new List<C2DPolyBase>();
// Turn the routes into polygons.
for (int i = Routes1.Count - 1; i >= 0; i--)
{
if (Routes1[i].IsClosed(true) && Routes1[i].Count > 2)
{
Polygons.Add(new C2DPolyBase());
Polygons[Polygons.Count - 1].CreateDirect( Routes1[i]);
}
else
{
// Debug.Assert(false);
grid.LogDegenerateError();
}
}
// Set up some temporary holed polygons
C2DHoledPolyBaseSet NewComPolys = new C2DHoledPolyBaseSet();
// Turn the set of polygons into holed polygons. Not needed for intersection.
if (!(bThisInside && bOtherInside))
{
C2DHoledPolyBase.PolygonsToHoledPolygons(NewComPolys, Polygons);
if (NewComPolys.Count != 1)
{
// Debug.Assert(false);
grid.LogDegenerateError();
}
}
else
{
for (int i = 0; i < Polygons.Count; i++)
HoledPolys.Add(new C2DHoledPolyBase(Polygons[i]));
}
// Now add them all to the provided set.
for (int i = 0 ; i < NewComPolys.Count; i++)
HoledPolys.Add(NewComPolys[i]);
}
}
break;
case CGrid.eDegenerateHandling.RandomPerturbation:
{
C2DPolyBase OtherCopy = new C2DPolyBase(Other);
OtherCopy.RandomPerturb();
grid.DegenerateHandling = CGrid.eDegenerateHandling.None;
GetBoolean( OtherCopy, HoledPolys, bThisInside, bOtherInside, grid);
grid.DegenerateHandling = CGrid.eDegenerateHandling.RandomPerturbation;
}
break;
case CGrid.eDegenerateHandling.DynamicGrid:
{
C2DRect Rect = new C2DRect();
if (this.BoundingRect.Overlaps(Other.BoundingRect, Rect))
{
double dOldGrid = grid.GridSize;
grid.SetToMinGridSize(Rect, false);
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGrid;
GetBoolean( Other, HoledPolys, bThisInside, bOtherInside, grid);
grid.DegenerateHandling = CGrid.eDegenerateHandling.DynamicGrid;
}
}
break;
case CGrid.eDegenerateHandling.PreDefinedGrid:
{
C2DPolyBase P1 = new C2DPolyBase(this);
C2DPolyBase P2 = new C2DPolyBase(Other);
P1.SnapToGrid(grid);
P2.SnapToGrid(grid);
C2DVector V1 = new C2DVector( P1.BoundingRect.TopLeft, P2.BoundingRect.TopLeft);
double dPerturbation = grid.GridSize; // ensure it snaps back to original grid positions.
if(V1.i > 0)
V1.i = dPerturbation;
else
V1.i = -dPerturbation; // move away slightly if possible
if(V1.j > 0)
V1.j = dPerturbation;
else
V1.j = -dPerturbation; // move away slightly if possible
V1.i *= 0.411923;// ensure it snaps back to original grid positions.
V1.j *= 0.313131;// ensure it snaps back to original grid positions.
P2.Move( V1 );
grid.DegenerateHandling = CGrid.eDegenerateHandling.None;
P1.GetBoolean( P2, HoledPolys, bThisInside, bOtherInside, grid);
for (int i = 0; i < HoledPolys.Count; i++)
HoledPolys[i].SnapToGrid(grid);
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGrid;
}
break;
case CGrid.eDegenerateHandling.PreDefinedGridPreSnapped:
{
C2DPolyBase P2 = new C2DPolyBase(Other);
C2DVector V1 = new C2DVector( this.BoundingRect.TopLeft, P2.BoundingRect.TopLeft);
double dPerturbation = grid.GridSize; // ensure it snaps back to original grid positions.
if (V1.i > 0)
V1.i = dPerturbation;
else
V1.i = -dPerturbation; // move away slightly if possible
if (V1.j > 0)
V1.j = dPerturbation;
else
V1.j = -dPerturbation; // move away slightly if possible
V1.i *= 0.411923;// ensure it snaps back to original grid positions.
V1.j *= 0.313131;// ensure it snaps back to original grid positions.
P2.Move( V1 );
grid.DegenerateHandling = CGrid.eDegenerateHandling.None;
GetBoolean( P2, HoledPolys, bThisInside, bOtherInside, grid);
for (int i = 0; i < HoledPolys.Count; i++)
HoledPolys[i].SnapToGrid(grid);
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGridPreSnapped;
}
break;
}
}
}
/// <summary>
/// Returns the routes (multiple lines or part polygons) either inside or
/// outside the polygons provided. These are based on the intersections
/// of the 2 polygons e.g. the routes / part polygons of one inside or
/// outside the other.
/// </summary>
/// <param name="Poly1">The first polygon.</param>
/// <param name="bP1RoutesInside">True if routes inside the second polygon are
/// required for the first polygon.</param>
/// <param name="Poly2">The second polygon.</param>
/// <param name="bP2RoutesInside">True if routes inside the first polygon are
/// required for the second polygon.</param>
/// <param name="Routes1">Output. Set of lines for the first polygon.</param>
/// <param name="Routes2">Output. Set of lines for the second polygon.</param>
public static void GetRoutes(C2DPolyBase Poly1, bool bP1RoutesInside,
C2DPolyBase Poly2, bool bP2RoutesInside,
C2DLineBaseSetSet Routes1, C2DLineBaseSetSet Routes2)
{
// Set up a collection of intersected points, and corresponding indexes.
C2DPointSet IntPoints = new C2DPointSet();
List<int> Indexes1 = new List<int>();
List<int> Indexes2 = new List<int>();
// Use the line collections in each shape to find the intersections between them.
Poly1.Lines.GetIntersections(Poly2.Lines, IntPoints,
Indexes1, Indexes2,
Poly1.BoundingRect, Poly2.BoundingRect);
// Make a copy of the point set because this will be sorted by line index in the
// Get routes function later. We need an unsorted set for each polygon.
C2DPointSet IntPointsCopy = new C2DPointSet();
IntPointsCopy.MakeCopy(IntPoints);
// Find out whether the first poly starts inside the second.
bool bP1StartInside = Poly2.Contains(Poly1.Lines[0].GetPointFrom());
// Find out if poly 2 starts inside poly 1.
bool bP2StartInside = Poly1.Contains(Poly2.Lines[0].GetPointFrom());
if (IntPoints.Count == 0 && !bP1StartInside && !bP2StartInside)
return; // No interaction between the 2.
// Get the routes of poly 1 inside / outside the other, passing the unsorted
// intersection points and polygon1 intersection indexes.
Poly1.GetRoutes(IntPoints, Indexes1, Routes1, bP1StartInside, bP1RoutesInside);
// Do the same for poly 2 but pass it the unsorted copy of the intersection points
// So that they correspond to the indexes.
Poly2.GetRoutes(IntPointsCopy, Indexes2, Routes2, bP2StartInside, bP2RoutesInside);
}
/// <summary>
/// Returns the routes (collection of lines and sublines) either inside or outside another
/// Given the intersection points.
/// </summary>
/// <param name="IntPts">The intersection points of this with the other polygon.</param>
/// <param name="IntIndexes">The corresponding line indexes.</param>
/// <param name="Routes">Output. The routes to get the result.</param>
/// <param name="bStartInside">True if this polygon starts inside the other.</param>
/// <param name="bRoutesInside">True if we require routes of this polygon inside the other.</param>
public void GetRoutes(C2DPointSet IntPts, List<int> IntIndexes,
C2DLineBaseSetSet Routes, bool bStartInside, bool bRoutesInside)
{
// Make sure the intersection indexes and points are the same size.
if (IntIndexes.Count != IntPts.Count )
{
Debug.Assert(false);
return;
}
// Set up a new collection of routes.
C2DLineBaseSetSet NewRoutes = new C2DLineBaseSetSet();
// If the polygon has no points then return.
if ( _Lines.Count < 1)
return;
// Sort the intersections by index so we can go through them in order.
IntPts.SortByIndex( IntIndexes );
// Set the inside / outside flag to the same as the start inside / outside flag.
bool bInside = bStartInside;
// If we are inside and want route inside or outside and want routes outside then add a new route.
if (bInside == bRoutesInside)
{
NewRoutes.Add(new C2DLineBaseSet());
}
// The current index of the intersects.
int usCurrentIntIndex = 0;
// cycle through the lines on the polygon.
for (int i = 0 ; i < Lines.Count ; i++)
{
// Set up a list of intersection points on this line only.
C2DPointSet IntsOnLine = new C2DPointSet();
// Cycle through all intersections on this line (leaving the usCurrentIntIndex at the next intersected line).
while ( usCurrentIntIndex < IntIndexes.Count && IntIndexes[usCurrentIntIndex] == i)
{
// Add a copy of the points on this line that are intersections
IntsOnLine.AddCopy( IntPts[ usCurrentIntIndex ] );
usCurrentIntIndex++;
}
// If the line in question intersects the other poly then we have left / entered.
if ( IntsOnLine.Count > 0 )
{
C2DLineBaseSet SubLines = new C2DLineBaseSet();
Lines[i].GetSubLines( IntsOnLine, SubLines );
while (SubLines.Count > 1)
{
if (bInside == bRoutesInside)
{
// We have 1. Left and want route in. OR 2. Entered and want routes out.
NewRoutes[NewRoutes.Count - 1].Add( SubLines.ExtractAt(0) );
bInside = true ^ bRoutesInside;
}
else
{
NewRoutes.Add(new C2DLineBaseSet());
bInside = false ^ bRoutesInside;
SubLines.RemoveAt(0);
}
}
if (bInside == bRoutesInside)
NewRoutes[NewRoutes.Count - 1].Add( SubLines.ExtractAt(SubLines.Count - 1 ) );
else
SubLines.RemoveAt(SubLines.Count - 1);
}
// Otherwise, if we are e.g. inside and want routes in the keep adding the end poitn of the line.
else if (bInside == bRoutesInside)
{
NewRoutes[NewRoutes.Count - 1].AddCopy( Lines[i] );
}
}
// Put all the new routes into the provided collection.
Routes.ExtractAllOf(NewRoutes);
}
