private static Point GetCircumCenter(Point firstPt, Point secondPt, Point thirdPt, Vector normal)
{
var one = firstPt.PointEntity;
var two = secondPt.PointEntity;
var thr = thirdPt.PointEntity;
using (IPlaneEntity planeOfCircle = HostFactory.Factory.PlaneByOriginNormal(one, normal.IVector))
{
using (ILineEntity perpBisector1 = GetPerpBisector(firstPt, secondPt, planeOfCircle))
{
using (ILineEntity perpBisector2 = GetPerpBisector(secondPt, thirdPt, planeOfCircle))
{
IPointEntity[] circumCntr = perpBisector1.IntersectWith(perpBisector2);
if (circumCntr == null || circumCntr.Length < 1)
{
return(null);
}
return(circumCntr[0].ToPoint(false, null));
}
}
}
}
