static private Slice2D SliceWithTwoHoles(Polygon polygon, Pair2f slice, Polygon holeA, Polygon holeB)
{
Slice2D result = Slice2D.Create();
if (holeA == holeB)
{
Debug.LogError("Slicer2D: Incorrect Split 2: Cannot Split Into Same Hole");
return(result);
}
Polygon polyA = new Polygon();
Polygon polyB = new Polygon(polygon.pointsList);
polyA.AddPoints(VectorList2f.GetListStartingIntersectLine(holeA.pointsList, slice));
polyA.AddPoints(VectorList2f.GetListStartingIntersectLine(holeB.pointsList, slice));
foreach (Polygon poly in polygon.holesList)
{
if (poly != holeA && poly != holeB)
{
polyB.AddHole(poly);
}
}
polyB.AddHole(polyA);
result.AddPolygon(polyB);
return(result);
}
static private Slice2D SliceWithOneHole(Polygon polygon, Pair2f slice, Polygon holeA, Polygon holeB)
{
Slice2D result = Slice2D.Create();
if (holeA == holeB)
{
Polygon polyA = new Polygon(polygon.pointsList);
Polygon polyB = new Polygon();
Polygon polyC = new Polygon();
Polygon currentPoly = polyB;
foreach (Pair2f pair in Pair2f.GetList(holeA.pointsList))
{
Vector2f point = MathHelper.GetPointLineIntersectLine(slice, pair);
if (point != null)
{
polyB.AddPoint(point);
polyC.AddPoint(point);
currentPoly = (currentPoly == polyB) ? polyC : polyB;
}
currentPoly.AddPoint(pair.B);
}
if (polyB.pointsList.Count > 2 && polyC.pointsList.Count > 2)
{
if (polyB.GetArea() > polyC.GetArea())
{
polyA.AddHole(polyB);
result.AddPolygon(polyC);
}
else
{
result.AddPolygon(polyB);
polyA.AddHole(polyC);
}
result.AddPolygon(polyA);
}
return(result);
// Cross From Side To Polygon
}
else if (polygon.PointInPoly(slice.A) == false || polygon.PointInPoly(slice.B) == false)
{
Polygon holePoly = (holeA != null) ? holeA : holeB;
if (holePoly != null)
{
Polygon polyA = new Polygon();
Polygon polyB = new Polygon(holePoly.pointsList);
polyB.pointsList.Reverse();
polyA.AddPoints(VectorList2f.GetListStartingIntersectLine(polygon.pointsList, slice));
polyA.AddPoints(VectorList2f.GetListStartingIntersectLine(polyB.pointsList, slice));
foreach (Polygon poly in polygon.holesList)
{
if (poly != holePoly)
{
polyA.AddHole(poly);
}
}
result.AddPolygon(polyA);
return(result);
}
}
return(result);
}