public static bool GetCircumcircle(Vector2 a, Vector2 b, Vector2 c, out Vector2 center, out double radius)
{
Vector2 edgeA = (b - a);
Vector2 edgeB = (c - b);
Vector2 edgeC = (a - c);
Vector2 edgeCenterA = (a + b) * 0.5;
Vector2 edgeCenterB = (b + c) * 0.5;
if (GeometryMath.Intersect(edgeCenterA, edgeA.Cross(), edgeCenterB, edgeB.Cross(), out center))
{
double lengthA = edgeA.Length();
double lengthB = edgeB.Length();
double lengthC = edgeC.Length();
double divider = Math.Sqrt((lengthA + lengthB + lengthC) * (lengthB + lengthC - lengthA) * (lengthA + lengthC - lengthB) * (lengthA + lengthB - lengthC));
if (divider > 0)
{
radius = (lengthA * lengthB * lengthC) / divider;
return(true);
}
}
radius = 0.0;
// All triangle points are on a line -> Infinite radius of circumcircle, cannot calculate radius
return(false);
}
public bool PointInCircumcircle(List <Vector2> points, Vector2 point)
{
Vector2 a = points[A];
Vector2 b = points[B];
Vector2 c = points[C];
return(GeometryMath.PointInCircumcircle(point, a, b, c));
}
public bool GetBarycentricCoordinates(List <Vector2> points, Vector2 point, out double t, out double u, out double v)
{
Vector2 a = points[A];
Vector2 b = points[B];
Vector2 c = points[C];
return(GeometryMath.GetBarycentricCoordinates(point, a, b, c, out t, out u, out v));
}
