public static bool FromThreePoints(Vector2 a, Vector2 b, Vector2 c, out Circle circle)
{
Line2D lineA = LineSegment2D.GetBisectorFast(a, b);
Line2D lineB = LineSegment2D.GetBisectorFast(b, c);
if (Intersect.Lines(lineA, lineB, out circle.center))
{
circle.radius = Vector2.Distance(circle.center, a);
return(true);
}
circle = default;
return(false);
}
public static bool FromPointTangentPoint(Vector2 startPt, Vector2 startTangent, Vector2 endPt, out Circle circle)
{
Line2D lineA = new Line2D(startPt, startTangent.Rotate90CW());
Line2D lineB = LineSegment2D.GetBisectorFast(startPt, endPt);
if (Intersect.Lines(lineA, lineB, out Vector2 pt))
{
circle = new Circle(pt, Vector2.Distance(pt, startPt));
return(true);
}
circle = default;
return(false);
}