/// <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.
var 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.
var 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.
var usCurrentIntIndex = 0;
// cycle through the lines on the polygon.
for (var i = 0; i < Lines.Count; i++)
{
// Set up a list of intersection points on this line only.
var 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)
{
var 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);
}
/// <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];
}
