internal Polyline2D2WN method_0(
IVertex2DCollection vertices,
GraphicsConfig config,
bool closed)
{
int count = vertices.Count;
if (count == 0)
{
return(new Polyline2D2WN(0));
}
IVertex2D vertex = vertices.GetIVertex2D(0);
Polyline2D2WN polyline = new Polyline2D2WN(count, closed);
for (int index = 1; index < count; ++index)
{
IVertex2D ivertex2D = vertices.GetIVertex2D(index);
this.method_1(config, polyline, vertex, ivertex2D);
vertex = ivertex2D;
}
if (closed)
{
this.method_1(config, polyline, vertex, vertices.GetIVertex2D(0));
}
else
{
double startWidth = vertex.StartWidth == 0.0 ? this.double_0 : vertex.StartWidth;
double endWidth = vertex.EndWidth == 0.0 ? this.double_1 : vertex.EndWidth;
Point2D2WN point2D2Wn = new Point2D2WN(vertex.Position, startWidth, endWidth);
polyline.Add(point2D2Wn);
}
return(polyline);
}
private void method_2(Polyline2D2WN polyline, IVertex2D vertex, IVertex2D nextVertex)
{
double startWidth = vertex.StartWidth == 0.0 ? this.double_0 : vertex.StartWidth;
double endWidth = vertex.EndWidth == 0.0 ? this.double_1 : vertex.EndWidth;
Vector2D vector2D = nextVertex.Position - vertex.Position;
Point2D2WN point2D2Wn = new Point2D2WN(vertex.Position, startWidth, endWidth)
{
StartNormal = new Vector2D(-vector2D.Y, vector2D.X).GetUnit()
};
point2D2Wn.EndNormal = point2D2Wn.StartNormal;
polyline.Add(point2D2Wn);
}
private void method_1(
GraphicsConfig config,
Polyline2D2WN polyline,
IVertex2D vertex,
IVertex2D nextVertex)
{
if (!(vertex.Position != nextVertex.Position))
{
return;
}
if (vertex.Bulge == 0.0)
{
this.method_2(polyline, vertex, nextVertex);
}
else
{
this.method_3(config, polyline, vertex, nextVertex);
}
}
public static double GetLength(Polyline2D2WN polyline, ILineTypeScaler lineTypeScaler)
{
double num = 0.0;
if (polyline.Count > 1)
{
Point2D2WN point2D2Wn1 = polyline[0];
for (int index = 1; index < polyline.Count; ++index)
{
Point2D2WN point2D2Wn2 = polyline[index];
num += lineTypeScaler.GetScaledLength(point2D2Wn2.Position - point2D2Wn1.Position);
point2D2Wn1 = point2D2Wn2;
}
if (polyline.Closed)
{
num += lineTypeScaler.GetScaledLength(polyline[0].Position - point2D2Wn1.Position);
}
}
return(num);
}
private void method_3(
GraphicsConfig config,
Polyline2D2WN polyline,
IVertex2D vertex,
IVertex2D nextVertex)
{
double num1 = vertex.StartWidth == 0.0 ? this.double_0 : vertex.StartWidth;
double val1 = vertex.EndWidth == 0.0 ? this.double_1 : vertex.EndWidth;
Vector2D vector2D1 = nextVertex.Position - vertex.Position;
double length = vector2D1.GetLength();
double num2 = 4.0 * System.Math.Atan(vertex.Bulge);
double num3 = length / (2.0 * System.Math.Abs(System.Math.Sin(num2 * 0.5)));
Vector2D vector2D2 = vector2D1;
vector2D2.Normalize();
double num4 = (double)System.Math.Sign(vertex.Bulge);
Vector2D vector2D3 = new Vector2D(-vector2D2.Y, vector2D2.X) * num4;
Point2D point2D = (Point2D)(((Vector2D)nextVertex.Position + (Vector2D)vertex.Position) * 0.5) + vector2D3 * System.Math.Cos(num2 * 0.5) * num3;
Vector2D vector2D4 = vertex.Position - point2D;
double num5 = System.Math.Atan2(vector2D4.Y, vector2D4.X);
Vector2D vector2D5 = nextVertex.Position - point2D;
double num6 = System.Math.Atan2(vector2D5.Y, vector2D5.X);
double num7 = num5;
double num8 = num4 * (2.0 * System.Math.PI) / (double)config.NoOfArcLineSegments;
while (num6 < num5)
{
num6 += 2.0 * System.Math.PI;
}
double num9 = vertex.Bulge >= 0.0 ? num6 - num5 : 2.0 * System.Math.PI - (num6 - num5);
double a = System.Math.Abs(num9 / num8);
if (a < (double)config.NoOfArcLineSegmentsMinimum)
{
a = (double)config.NoOfArcLineSegmentsMinimum;
num8 = num4 * System.Math.Abs(num9 / (double)config.NoOfArcLineSegmentsMinimum);
}
if (a < 2.0)
{
this.method_2(polyline, vertex, nextVertex);
}
else
{
double startWidth1 = num1;
double num10 = (val1 - num1) / a;
int num11 = (int)System.Math.Ceiling(a);
double endWidth1 = System.Math.Min(val1, startWidth1 + num10);
double x1 = System.Math.Cos(num7);
double y1 = System.Math.Sin(num7);
Point2D2WN point2D2Wn1 = new Point2D2WN(point2D + new Vector2D(x1 * num3, y1 * num3), startWidth1, endWidth1);
point2D2Wn1.StartNormal = -num4 * new Vector2D(x1, y1);
polyline.Add(point2D2Wn1);
double startWidth2 = endWidth1;
double num12 = num7 + num8;
for (int index = 1; index < num11; ++index)
{
double x2 = System.Math.Cos(num12);
double y2 = System.Math.Sin(num12);
Vector2D vector2D6 = -num4 * new Vector2D(x2, y2);
point2D2Wn1.EndNormal = vector2D6;
Point2D position = point2D + new Vector2D(x2 * num3, y2 * num3);
double endWidth2 = System.Math.Min(val1, startWidth2 + num10);
Point2D2WN point2D2Wn2 = new Point2D2WN(position, startWidth2, endWidth2);
point2D2Wn2.IsInterpolatedPoint = true;
point2D2Wn2.StartNormal = vector2D6;
polyline.Add(point2D2Wn2);
startWidth2 = endWidth2;
num12 += num8;
point2D2Wn1 = point2D2Wn2;
}
point2D2Wn1.EndNormal = -num4 * new Vector2D(System.Math.Cos(num6), System.Math.Sin(num6));
}
}
