public void SetCircle3Points(Point[] p)
{
PointDbl[] dblArray = new PointDbl[3];
PointDbl dbl3 = new PointDbl(p[0]);
dblArray[0] = dbl3;
PointDbl dbl2 = new PointDbl(p[1]);
dblArray[1] = dbl2;
PointDbl dbl = new PointDbl(p[2]);
dblArray[2] = dbl;
CircleInfo info = CGM2SVGMath.FindCircleBy3Points(dblArray);
if (info.R >= 0.0)
{
this.center.X = new decimal(info.Center.X);
this.center.Y = new decimal(info.Center.Y);
this.SetCircleDiameters(info.R, Math2.CompareAngles(Convert.ToDouble(decimal.Subtract(p[2].X, p[0].X)), Convert.ToDouble(decimal.Subtract(p[2].Y, p[0].Y)), Convert.ToDouble(decimal.Subtract(p[1].X, p[0].X)), Convert.ToDouble(decimal.Subtract(p[1].Y, p[0].Y))) < 0.0);
this.v1.X = decimal.Subtract(p[0].X, this.center.X);
this.v1.Y = decimal.Subtract(p[0].Y, this.center.Y);
this.v2.X = decimal.Subtract(p[2].X, this.center.X);
this.v2.Y = decimal.Subtract(p[2].Y, this.center.Y);
}
else
{
this.collinearCoords = true;
this.center = p[1];
this.SetCircleDiameters(Math2.Distance(Convert.ToDouble(decimal.Subtract(p[0].X, this.center.X)), Convert.ToDouble(decimal.Subtract(p[2].X, this.center.X))), false);
this.v1.X = decimal.Subtract(p[0].X, this.center.X);
this.v1.Y = decimal.Subtract(p[0].Y, this.center.Y);
this.v2.X = decimal.Subtract(p[2].X, this.center.X);
this.v2.Y = decimal.Subtract(p[2].Y, this.center.Y);
}
}
// 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);
}
