/// <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.
var IntPoints = new C2DPointSet();
var Indexes1 = new List <int>();
var 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.
var 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 (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>
/// 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:
{
var Routes1 = new C2DLineBaseSetSet();
var 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.
var Polygons = new List <C2DPolyBase>();
// Turn the routes into polygons.
for (var 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
var 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 (var i = 0; i < Polygons.Count; i++)
{
HoledPolys.Add(new C2DHoledPolyBase(Polygons[i]));
}
}
// Now add them all to the provided set.
for (var i = 0; i < NewComPolys.Count; i++)
{
HoledPolys.Add(NewComPolys[i]);
}
}
}
break;
case CGrid.eDegenerateHandling.RandomPerturbation:
{
var 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:
{
var Rect = new C2DRect();
if (this.BoundingRect.Overlaps(Other.BoundingRect, Rect))
{
var 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:
{
var P1 = new C2DPolyBase(this);
var P2 = new C2DPolyBase(Other);
P1.SnapToGrid(grid);
P2.SnapToGrid(grid);
var V1 = new C2DVector(P1.BoundingRect.TopLeft, P2.BoundingRect.TopLeft);
var 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 (var i = 0; i < HoledPolys.Count; i++)
{
HoledPolys[i].SnapToGrid(grid);
}
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGrid;
}
break;
case CGrid.eDegenerateHandling.PreDefinedGridPreSnapped:
{
var P2 = new C2DPolyBase(Other);
var V1 = new C2DVector(this.BoundingRect.TopLeft, P2.BoundingRect.TopLeft);
var 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 (var 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>
/// <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];
}