// Methods
public static CircleInfo FindCircleBy3Points(PointDbl[] p)
{
CircleInfo info = new CircleInfo();//TODO
if (Math2.IsNul(Math2.CompareAngles(p[0].X - p[1].X, p[0].Y - p[1].Y, p[2].X - p[1].X, p[2].Y - p[1].Y)))
{
info.R = -1.0;
return(info);
}
double[] numArray = Math2.SolveSystem2(new double[, ] {
{ 2.0 * (p[0].X - p[2].X), 2.0 * (p[0].Y - p[2].Y) }, { 2.0 * (p[1].X - p[2].X), 2.0 * (p[1].Y - p[2].Y) }
}, new double[] { (((p[0].X * p[0].X) - (p[2].X * p[2].X)) + (p[0].Y * p[0].Y)) - (p[2].Y * p[2].Y), (((p[1].X * p[1].X) - (p[2].X * p[2].X)) + (p[1].Y * p[1].Y)) - (p[2].Y * p[2].Y) });
info.Center.X = numArray[0];
info.Center.Y = numArray[1];
info.R = Math2.Distance(p[0].X - numArray[0], p[0].Y - numArray[1]);
return(info);
}
// Methods
public string GetPath(SVGContext context)
{
this.center = context.fxy(this.center);
this.cd1 = context.fxy(this.cd1);
this.cd2 = context.fxy(this.cd2);
double introduced6 = Convert.ToDouble(decimal.Subtract(this.cd1.X, this.center.X));
double num2 = Math2.Distance(introduced6, Convert.ToDouble(decimal.Subtract(this.cd1.Y, this.center.Y)));
double introduced7 = Convert.ToDouble(decimal.Subtract(this.cd2.X, this.center.X));
double num3 = Math2.Distance(introduced7, Convert.ToDouble(decimal.Subtract(this.cd2.Y, this.center.Y)));
decimal introduced8 = decimal.Subtract(this.cd1.Y, this.center.Y);
double num = Math.Atan(Convert.ToDouble(decimal.Divide(introduced8, decimal.Subtract(this.cd1.X, this.center.X)))) * 57.295779513082323;
string str = " M" + (Convert.ToDouble(this.center.X) - num2).ToString() + "," + this.center.Y.ToString();
str = ((str + " A" + num2.ToString() + "," + num3.ToString()) + " 0 0 1 ") + (Convert.ToDouble(this.center.X) + num2).ToString() + "," + this.center.Y.ToString();
str = str + " M" + (Convert.ToDouble(this.center.X) + num2).ToString() + "," + this.center.Y.ToString();
str = (((str + " A" + num2.ToString() + "," + num3.ToString()) + " 0 0 1 ") + (Convert.ToDouble(this.center.X) - num2).ToString() + "," + this.center.Y.ToString()) + "Z";
context.newregion = true;
return(str);
}
public static SVGEllipseArc FindSVGArc(PointDbl p, PointDbl p1, PointDbl p2, PointDbl Δstart, PointDbl Δend)
{
SVGEllipseArc arc2 = new SVGEllipseArc();
arc2.RadiusX = Math2.Distance(p.X, p.Y, p2.X, p2.Y);
arc2.RadiusY = Math2.Distance(p.X, p.Y, p1.X, p1.Y);
double[,] a = FindEllipseTransformToHorizontal(p, p1, p2);
double[,] numArray2 = SpecialInvertMatrix(a);
PointDbl dbl3 = new PointDbl(Δstart.X + p.X, Δstart.Y + p.Y);
PointDbl dbl2 = TransformPoint(numArray2, dbl3);
double introduced10 = Math2.Sqr(dbl2.X / arc2.RadiusX);
double num = Math.Sqrt(introduced10 + Math2.Sqr(dbl2.Y / arc2.RadiusY));
dbl2.X /= num;
dbl2.Y /= num;
dbl3 = new PointDbl(Δend.X + p.X, Δend.Y + p.Y);
PointDbl dbl = TransformPoint(numArray2, dbl3);
double introduced11 = Math2.Sqr(dbl.X / arc2.RadiusX);
double num2 = Math.Sqrt(introduced11 + Math2.Sqr(dbl.Y / arc2.RadiusY));
dbl.X /= num2;
dbl.Y /= num2;
if (Math2.Is90DegIntersection(p1.X - p.X, p1.Y - p.Y, p2.X - p.X, p2.Y - p.Y))
{
arc2.AngleX = Math.Atan2(a[1, 0], a[0, 0]);
arc2.StartP = TransformPoint(a, dbl2);
arc2.EndP = TransformPoint(a, dbl);
arc2.CenterP = p;
arc2.SweepFlag = Math2.CompareAngles(p1.X - p.X, p1.Y - p.Y, p2.X - p.X, p2.Y - p.Y) < 0.0;
arc2.LargeArc = Math2.CompareAngles(dbl2.X, dbl2.Y, dbl.X, dbl.Y) < 0.0;
return(arc2);
}
arc2.Transform = a;
arc2.AngleX = 0.0;
arc2.StartP = dbl2;
arc2.EndP = dbl;
dbl3 = new PointDbl(0.0, 0.0);
arc2.CenterP = dbl3;
arc2.SweepFlag = false;
arc2.LargeArc = Math2.CompareAngles(dbl2.X, dbl2.Y, dbl.X, dbl.Y) < 0.0;
return(arc2);
}
