/// <summary>
/// Constructor.
/// </summary>
/// <param name="Other">Other polygon to set this to.</param>
public C2DHoledPolyArc(C2DHoledPolyBase Other)
{
_Rim = new C2DPolyArc(Other.Rim);
for (int i = 0; i < Other.HoleCount; i++)
{
_Holes.Add(new C2DPolyArc(Other.GetHole(i)));
}
}
/// <summary>
/// Constructor.
/// </summary>
public C2DHoledPolygon(C2DHoledPolyBase Other)
{
_Rim = new C2DPolygon(Other.Rim);
for (int i = 0; i < Other.HoleCount; i++)
{
_Holes.Add(new C2DPolygon(Other.GetHole(i) ));
}
}
/// <summary>
/// Draws a polygon
/// </summary>
public void Draw(C2DHoledPolyBase Poly, Graphics graphics, Pen pen)
{
Draw(Poly.Rim, graphics, pen);
for (int h = 0; h < Poly.HoleCount; h++)
{
Draw(Poly.GetHole(h), graphics, pen);
}
}
/// <summary>
/// Assignment.
/// </summary>
/// <param name="Other">Other polygon to set this to.</param>
public void Set(C2DHoledPolyBase Other)
{
_Rim.Set(Other.Rim);
_Holes.Clear();
for (int i = 0 ; i < Other.HoleCount; i++)
{
_Holes.Add(new C2DPolyBase(Other.GetHole(i)));
}
}
/// <summary>
/// Assignment.
/// </summary>
/// <param name="Other">Other polygon to set this to.</param>
public new void Set(C2DHoledPolyBase Other)
{
_Rim.Set(Other.Rim);
_Holes.Clear();
for (int i = 0; i < Other.HoleCount; i++)
{
_Holes.Add(new C2DPolyArc(Other.GetHole(i)));
}
}
/// <summary>
/// Assignment.
/// </summary>
/// <param name="Other">Other polygon to set this to.</param>
public new void Set(C2DHoledPolyBase Other)
{
_Holes.Clear();
_Rim = new C2DPolygon(Other.Rim);
for (var i = 0; i < Other.HoleCount; i++)
{
_Holes.Add(new C2DPolygon(Other.GetHole(i)));
}
}
/// <summary>
/// True if this overlaps the other.
/// </summary>
/// <param name="Other">Other polygon to test for.</param>
public bool Overlaps(C2DHoledPolyBase Other)
{
if (!Overlaps(Other.Rim))
{
return(false);
}
for (var i = 0; i < Other.HoleCount; i++)
{
if (Other.GetHole(i).Contains(_Rim))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Polygon entirely inside test.
/// </summary>
/// <param name="Polygon">Polygon to test for.</param>
public bool Contains(C2DHoledPolyBase Polygon)
{
if (!Contains(Polygon.Rim))
{
return(false);
}
for (var i = 0; i < Polygon.HoleCount; i++)
{
if (!Contains(Polygon.GetHole(i)))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Draws a polygon filled.
/// </summary>
public void DrawFilled(C2DHoledPolyBase Poly, Graphics graphics, Brush brush)
{
if (Poly.Rim.Lines.Count == 0)
{
return;
}
System.Drawing.Drawing2D.GraphicsPath gp = CreatePath(Poly.Rim);
for (int h = 0; h < Poly.HoleCount; h++)
{
if (Poly.GetHole(h).Lines.Count > 2)
{
gp.AddPath(CreatePath(Poly.GetHole(h)), false);
}
}
gp.FillMode = System.Drawing.Drawing2D.FillMode.Alternate;
graphics.FillPath(brush, gp);
}
/// <summary>
/// Function to convert polygons to complex polygons. Assigning holes to those that are contained.
/// The set of holed polygons will be filled from the set of simple polygons.
/// </summary>
/// <param name="HoledPolys">Holed polygon set.</param>
/// <param name="Polygons">Simple polygon set.</param>
public static void PolygonsToHoledPolygons(List<C2DHoledPolyBase> HoledPolys,
List<C2DPolyBase> Polygons)
{
List<C2DPolyBase> Unmatched = new List<C2DPolyBase>();
List<C2DHoledPolyBase> NewHoledPolys = new List<C2DHoledPolyBase>();
for (int i = Polygons.Count - 1 ; i >= 0 ; i--)
{
bool bMatched = false;
C2DPolyBase pPoly = Polygons[i];
Polygons.RemoveAt(i);
// Cycle through the newly created polygons to see if it's a hole.
for ( int p = 0; p < NewHoledPolys.Count; p++)
{
if ( NewHoledPolys[p].Rim.Contains( pPoly.Lines[0].GetPointFrom() ))
{
NewHoledPolys[p].AddHole(pPoly);
bMatched = true;
break;
}
}
// If its not then compare it to all the other unknowns.
if (!bMatched)
{
int u = 0;
bool bKnownRim = false;
while (u < Unmatched.Count)
{
if ( !bKnownRim && Unmatched[u].Contains( pPoly.Lines[0].GetPointFrom() ))
{
// This is a hole.
NewHoledPolys.Add(new C2DHoledPolyBase());
NewHoledPolys[ NewHoledPolys.Count -1 ].Rim = Unmatched[u];
Unmatched.RemoveAt(u);
NewHoledPolys[ NewHoledPolys.Count -1 ].AddHole(pPoly);
bMatched = true;
break;
}
else if ( pPoly.Contains( Unmatched[u].Lines[0].GetPointFrom() ))
{
// int nCount = OverlapPolygons->GetCount();
// This is a rim.
if (!bKnownRim)
{
// If we haven't alreay worked this out then record that its a rim
// and set up the new polygon.
bKnownRim = true;
NewHoledPolys.Add(new C2DHoledPolyBase());
NewHoledPolys[ NewHoledPolys.Count -1 ].Rim = pPoly;
NewHoledPolys[ NewHoledPolys.Count -1 ].AddHole( Unmatched[u] );
Unmatched.RemoveAt(u);
}
else
{
// We already worked out this was a rim so it must be the last polygon.
NewHoledPolys[ NewHoledPolys.Count -1 ].AddHole( Unmatched[u] );
Unmatched.RemoveAt(u);
}
// Record that its been matched.
bMatched = true;
}
else
{
// Only if there was no match do we increment the counter.
u++;
}
}
}
if (!bMatched)
{
Unmatched.Add(pPoly);
}
}
for (int i = 0; i < Unmatched.Count; i++)
{
C2DHoledPolyBase NewHoled = new C2DHoledPolyBase();
NewHoled.Rim = Unmatched[i];
HoledPolys.Add(NewHoled);
}
HoledPolys.AddRange(NewHoledPolys);
}
/// <summary>
/// Returns the difference between this and the other polygon.
/// </summary>
/// <param name="Other">Other polygon.</param>
/// <param name="HoledPolys">Set to receieve all the resulting polygons.</param>
/// <param name="grid">Grid containing the degenerate handling settings.</param>
public void GetNonOverlaps(C2DHoledPolyBase Other, List<C2DHoledPolyBase> HoledPolys,
CGrid grid)
{
GetBoolean(Other, HoledPolys, false, true, grid);
}
/// <summary>
/// Function to convert polygons to complex polygons. Assigning holes to those that are contained.
/// The set of holed polygons will be filled from the set of simple polygons.
/// </summary>
/// <param name="HoledPolys">Holed polygon set.</param>
/// <param name="Polygons">Simple polygon set.</param>
public static void PolygonsToHoledPolygons(List <C2DHoledPolyBase> HoledPolys,
List <C2DPolyBase> Polygons)
{
var Unmatched = new List <C2DPolyBase>();
var NewHoledPolys = new List <C2DHoledPolyBase>();
for (var i = Polygons.Count - 1; i >= 0; i--)
{
var bMatched = false;
var pPoly = Polygons[i];
Polygons.RemoveAt(i);
// Cycle through the newly created polygons to see if it's a hole.
for (var p = 0; p < NewHoledPolys.Count; p++)
{
if (NewHoledPolys[p].Rim.Contains(pPoly.Lines[0].GetPointFrom()))
{
NewHoledPolys[p].AddHole(pPoly);
bMatched = true;
break;
}
}
// If its not then compare it to all the other unknowns.
if (!bMatched)
{
var u = 0;
var bKnownRim = false;
while (u < Unmatched.Count)
{
if (!bKnownRim && Unmatched[u].Contains(pPoly.Lines[0].GetPointFrom()))
{
// This is a hole.
NewHoledPolys.Add(new C2DHoledPolyBase());
NewHoledPolys[NewHoledPolys.Count - 1].Rim = Unmatched[u];
Unmatched.RemoveAt(u);
NewHoledPolys[NewHoledPolys.Count - 1].AddHole(pPoly);
bMatched = true;
break;
}
else if (pPoly.Contains(Unmatched[u].Lines[0].GetPointFrom()))
{
// int nCount = OverlapPolygons->GetCount();
// This is a rim.
if (!bKnownRim)
{
// If we haven't alreay worked this out then record that its a rim
// and set up the new polygon.
bKnownRim = true;
NewHoledPolys.Add(new C2DHoledPolyBase());
NewHoledPolys[NewHoledPolys.Count - 1].Rim = pPoly;
NewHoledPolys[NewHoledPolys.Count - 1].AddHole(Unmatched[u]);
Unmatched.RemoveAt(u);
}
else
{
// We already worked out this was a rim so it must be the last polygon.
NewHoledPolys[NewHoledPolys.Count - 1].AddHole(Unmatched[u]);
Unmatched.RemoveAt(u);
}
// Record that its been matched.
bMatched = true;
}
else
{
// Only if there was no match do we increment the counter.
u++;
}
}
}
if (!bMatched)
{
Unmatched.Add(pPoly);
}
}
for (var i = 0; i < Unmatched.Count; i++)
{
var NewHoled = new C2DHoledPolyBase();
NewHoled.Rim = Unmatched[i];
HoledPolys.Add(NewHoled);
}
HoledPolys.AddRange(NewHoledPolys);
}
/// <summary>
/// True if this overlaps the other.
/// </summary>
/// <param name="Other">Other polygon to test for.</param>
public bool Overlaps(C2DHoledPolyBase Other)
{
if (!Overlaps( Other.Rim ))
return false;
for (int i = 0 ; i < Other.HoleCount; i++)
{
if (Other.GetHole(i).Contains(_Rim))
return false;
}
return true;
}
/// <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:
{
var CompleteHoles1 = new List <C2DPolyBase>();
var CompleteHoles2 = new List <C2DPolyBase>();
var Routes1 = new C2DLineBaseSetSet();
var Routes2 = new C2DLineBaseSetSet();
GetRoutes(this, bThisInside, Other, bOtherInside, Routes1, Routes2,
CompleteHoles1, CompleteHoles2, grid);
Routes1.ExtractAllOf(Routes2);
if (Routes1.Count > 0)
{
Routes1.MergeJoining();
var Polygons = new List <C2DPolyBase>();
for (var 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();
}
}
var 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:
{
var 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:
{
var 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:
{
var P1 = new C2DHoledPolyBase(this);
var P2 = new C2DHoledPolyBase(Other);
P1.SnapToGrid(grid);
P2.SnapToGrid(grid);
var V1 = new C2DVector(P1.Rim.BoundingRect.TopLeft, P2.Rim.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 C2DHoledPolyBase(Other);
var V1 = new C2DVector(_Rim.BoundingRect.TopLeft, P2.Rim.BoundingRect.TopLeft);
var 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 (var i = 0; i < HoledPolys.Count; i++)
{
HoledPolys[i].SnapToGrid(grid);
}
grid.DegenerateHandling = CGrid.eDegenerateHandling.PreDefinedGridPreSnapped;
}
break;
} // switch
}
}
/// <summary>
/// Polygon entirely inside test.
/// </summary>
/// <param name="Polygon">Polygon to test for.</param>
public bool Contains(C2DHoledPolyBase Polygon)
{
if (! Contains( Polygon.Rim))
return false;
for (int i = 0 ; i < Polygon.HoleCount; i++)
{
if (! Contains( Polygon.GetHole(i)) )
return false;
}
return true;
}
/// <summary>
/// Returns the difference between this and the other polygon.
/// </summary>
/// <param name="Other">Other polygon.</param>
/// <param name="HoledPolys">Set to receieve all the resulting polygons.</param>
/// <param name="grid">Grid containing the degenerate handling settings.</param>
public void GetNonOverlaps(C2DHoledPolyBase Other, List <C2DHoledPolyBase> HoledPolys,
CGrid grid)
{
GetBoolean(Other, HoledPolys, false, true, grid);
}
/// <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 union of this and the other.
/// </summary>
/// <param name="Other">Other polygon.</param>
/// <param name="HoledPolys">Set to receieve all the resulting polygons.</param>
/// <param name="grid">Grid containing the degenerate handling settings.</param>
public void GetUnion(C2DHoledPolyBase Other, List<C2DHoledPolyBase> HoledPolys,
CGrid grid)
{
GetBoolean(Other, HoledPolys,false , false, grid);
}
/// <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;
}
var IntPointsTemp = new C2DPointSet();
var IntPointsRim1 = new C2DPointSet();
var IntPointsRim2 = new C2DPointSet();
var IndexesRim1 = new List <int>();
var IndexesRim2 = new List <int>();
var IntPoints1AllHoles = new List <C2DPointSet>();
var IntPoints2AllHoles = new List <C2DPointSet>();
var Indexes1AllHoles = new List <List <int> >();
var Indexes2AllHoles = new List <List <int> >();
// std::vector<C2DPointSet* > IntPoints1AllHoles, IntPoints2AllHoles;
// std::vector<CIndexSet*> Indexes1AllHoles, Indexes2AllHoles;
var usP1Holes = Poly1.HoleCount;
var 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 (var 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 (var 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 (var h = 0; h < usP1Holes; h++)
{
for (var k = 0; k < usP2Holes; k++)
{
Debug.Assert(IntPointsTemp.Count == 0);
var pHole1 = Poly1.GetHole(h);
var 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 (var a = 0; a < usP1Holes; a++)
{
var 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 (var b = 0; b < usP2Holes; b++)
{
var 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>
/// Returns the union of this and the other.
/// </summary>
/// <param name="Other">Other polygon.</param>
/// <param name="HoledPolys">Set to receieve all the resulting polygons.</param>
/// <param name="grid">Grid containing the degenerate handling settings.</param>
public void GetUnion(C2DHoledPolyBase Other, List <C2DHoledPolyBase> HoledPolys,
CGrid grid)
{
GetBoolean(Other, HoledPolys, false, false, grid);
}
/// <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>
/// True if this overlaps the other.
/// </summary>
/// <param name="Other">The other polygon.</param>
public bool Overlaps(C2DHoledPolyBase Other)
{
return(Other.Overlaps(this));
}
/// <summary>
/// Draws a polygon filled.
/// </summary>
public void DrawFilled(C2DHoledPolyBase Poly, Graphics graphics, Brush brush)
{
if (Poly.Rim.Lines.Count == 0)
return;
System.Drawing.Drawing2D.GraphicsPath gp = CreatePath(Poly.Rim);
for (int h = 0; h < Poly.HoleCount; h++)
{
if (Poly.GetHole(h).Lines.Count > 2)
{
gp.AddPath( CreatePath( Poly.GetHole(h)), false);
}
}
gp.FillMode = System.Drawing.Drawing2D.FillMode.Alternate;
graphics.FillPath(brush, gp);
}
/// <summary>
/// True if this overlaps the other.
/// </summary>
/// <param name="Other">The other polygon.</param>
public bool Overlaps(C2DHoledPolyBase Other)
{
return Other.Overlaps(this);
}
/// <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>
/// Draws a polygon
/// </summary>
public void Draw(C2DHoledPolyBase Poly, Graphics graphics, Pen pen)
{
Draw(Poly.Rim, graphics, pen);
for (int h = 0; h < Poly.HoleCount; h++)
{
Draw(Poly.GetHole(h), graphics, pen);
}
}
