private static void smethod_4(
List <Class455.Class459> edgeRefs,
List <Class455.Class456> intersections)
{
edgeRefs.Sort();
List <Class455.Class458> class458List = new List <Class455.Class458>();
foreach (Class455.Class459 edgeRef in edgeRefs)
{
if (!edgeRef.Insert)
{
class458List.Remove(edgeRef.class458_0);
}
else
{
Class455.Class458 class4580 = edgeRef.class458_0;
bool bool0 = class4580.bool_0;
foreach (Class455.Class458 edge2 in class458List)
{
if (bool0 ^ edge2.bool_0)
{
Class455.smethod_5(class4580, edge2, intersections);
}
}
class458List.Add(class4580);
}
}
}
private static IList <Class455.Class459> smethod_3(
Polyline3D poly,
out Point2D min,
out Point2D max)
{
min = new Point2D(double.MaxValue, double.MaxValue);
max = new Point2D(double.MinValue, double.MinValue);
int count = poly.Count;
if (count <= 0)
{
return((IList <Class455.Class459>) new List <Class455.Class459>());
}
List <Class455.Class459> class459List = new List <Class455.Class459>(2 * count);
Point3D end;
int num;
if (poly.Closed)
{
end = poly[0];
num = poly.Count - 1;
}
else
{
end = poly[poly.Count - 1];
num = poly.Count - 2;
min = max = (Point2D)end;
}
for (int startParameter = num; startParameter >= 0; --startParameter)
{
Point3D start = poly[startParameter];
if (start.X > max.X)
{
max.X = start.X;
}
if (start.Y > max.Y)
{
max.Y = start.Y;
}
if (start.X < min.X)
{
min.X = start.X;
}
if (start.Y < min.Y)
{
min.Y = start.Y;
}
Class455.Class458 edge = new Class455.Class458(startParameter, start, end, true);
if (edge.vector3D_0 != Vector3D.Zero)
{
class459List.Add(new Class455.Class459(true, edge));
class459List.Add(new Class455.Class459(false, edge));
}
end = start;
}
return((IList <Class455.Class459>)class459List);
}
public Class459(bool fromStart, Class455.Class458 edge)
{
this.bool_0 = fromStart;
this.class458_0 = edge;
this.int_0 = edge.point3D_0.Y.CompareTo(edge.point3D_1.Y);
if (this.int_0 == 0)
{
this.int_0 = edge.point3D_0.X.CompareTo(edge.point3D_1.X);
}
if (fromStart)
{
return;
}
this.int_0 = -this.int_0;
}
private static IList <Class455.Class459> smethod_2(
Polygon2D poly,
out Point2D min,
out Point2D max)
{
min = new Point2D(double.MaxValue, double.MaxValue);
max = new Point2D(double.MinValue, double.MinValue);
int count = poly.Count;
if (count <= 0)
{
return((IList <Class455.Class459>) new List <Class455.Class459>());
}
List <Class455.Class459> class459List = new List <Class455.Class459>(2 * count);
Point2D point2D1 = poly[0];
for (int startParameter = count - 1; startParameter >= 0; --startParameter)
{
Point2D point2D2 = poly[startParameter];
if (point2D2.X > max.X)
{
max.X = point2D2.X;
}
if (point2D2.Y > max.Y)
{
max.Y = point2D2.Y;
}
if (point2D2.X < min.X)
{
min.X = point2D2.X;
}
if (point2D2.Y < min.Y)
{
min.Y = point2D2.Y;
}
Class455.Class458 edge = new Class455.Class458(startParameter, (Point3D)point2D2, (Point3D)point2D1, false);
if (edge.vector3D_0 != Vector3D.Zero)
{
class459List.Add(new Class455.Class459(true, edge));
class459List.Add(new Class455.Class459(false, edge));
}
point2D1 = point2D2;
}
return((IList <Class455.Class459>)class459List);
}
public List <Class455.Class456> method_1(Point3D start, Point3D end)
{
double x1;
double x2;
if (start.X < end.X)
{
x1 = start.X;
x2 = end.X;
}
else
{
x1 = end.X;
x2 = start.X;
}
double y1;
double y2;
if (start.Y < end.Y)
{
y1 = start.Y;
y2 = end.Y;
}
else
{
y1 = end.Y;
y2 = start.Y;
}
List <Class455.Class456> intersections = new List <Class455.Class456>();
if (x1 < this.point2D_1.X && x2 > this.point2D_0.X && (y1 < this.point2D_1.Y && y2 > this.point2D_0.Y))
{
List <Class455.Class459> edgeRefs = new List <Class455.Class459>(this.ilist_0.Count + 2);
edgeRefs.AddRange((IEnumerable <Class455.Class459>) this.ilist_0);
Class455.Class458 edge = new Class455.Class458(0, start, end, true);
edgeRefs.Add(new Class455.Class459(true, edge));
edgeRefs.Add(new Class455.Class459(false, edge));
Class455.smethod_4(edgeRefs, intersections);
}
return(intersections);
}
private static void smethod_5(
Class455.Class458 edge1,
Class455.Class458 edge2,
List <Class455.Class456> intersections)
{
Class455.Class458 class458_1;
Class455.Class458 class458_2;
if (edge1.bool_0)
{
class458_1 = edge2;
class458_2 = edge1;
}
else
{
class458_1 = edge1;
class458_2 = edge2;
}
Vector3D vector3D0_1 = class458_1.vector3D_0;
Vector3D vector3D0_2 = class458_2.vector3D_0;
double num1 = 1E-08 * class458_1.double_0 * class458_2.double_0;
double num2 = vector3D0_1.X * vector3D0_2.Y - vector3D0_1.Y * vector3D0_2.X;
if (System.Math.Abs(num2) < num1)
{
Vector3D vector3D = class458_1.point3D_0 - class458_2.point3D_0;
if (System.Math.Abs(vector3D.X * vector3D0_2.Y - vector3D.Y * vector3D0_2.X) >= num1)
{
return;
}
double val1 = class458_2.method_0(class458_1.point3D_0.X, class458_1.point3D_0.Y);
double val2 = class458_2.method_0(class458_1.point3D_1.X, class458_1.point3D_1.Y);
double num3 = System.Math.Min(val1, val2);
if (num3 > 1.0)
{
return;
}
double num4 = System.Math.Max(val1, val2);
if (num4 < 0.0)
{
return;
}
if (num3 < 0.0)
{
num3 = 0.0;
}
if (num4 > 1.0)
{
num4 = 1.0;
}
if (num4 - num3 < 1E-08)
{
double num5 = 0.5 * (num3 + num4);
Point2D point2D = class458_2.method_1(num5);
double clipParam = class458_1.method_0(point2D.X, point2D.Y);
if (clipParam < 0.0 || clipParam > 1.0)
{
return;
}
Class455.Class456 class456 = new Class455.Class456(class458_1.int_0, clipParam, class458_2.int_0, num5);
intersections?.Add(class456);
}
else
{
if (intersections == null)
{
return;
}
Point2D point2D = class458_2.method_1(num3);
double clipParam1 = class458_1.method_0(point2D.X, point2D.Y);
if (clipParam1 < 0.0 || clipParam1 > 1.0)
{
return;
}
intersections.Add(new Class455.Class456(class458_1.int_0, clipParam1, class458_2.int_0, num3));
point2D = class458_2.method_1(num4);
double clipParam2 = class458_1.method_0(point2D.X, point2D.Y);
intersections.Add(new Class455.Class456(class458_1.int_0, clipParam2, class458_2.int_0, num4));
}
}
else
{
Vector3D vector3D = class458_2.point3D_0 - class458_1.point3D_0;
double clipParam = (vector3D.X * vector3D0_2.Y - vector3D.Y * vector3D0_2.X) / num2;
if (clipParam < 0.0 || clipParam > 1.0)
{
return;
}
double polygonParam = (vector3D.X * vector3D0_1.Y - vector3D.Y * vector3D0_1.X) / num2;
if (polygonParam < 0.0 || polygonParam > 1.0)
{
return;
}
Class455.Class456 class456 = new Class455.Class456(class458_1.int_0, clipParam, class458_2.int_0, polygonParam);
intersections?.Add(class456);
}
}