public static Plane ReferencePlane(this Face3D face3D, double tolerance = Core.Tolerance.Distance)
{
Plane plane = face3D?.GetPlane();
if (plane == null)
{
return(null);
}
Vector3D normal = plane.Normal;
Vector3D axis_Y = new Plane(plane, Point3D.Zero).Project(Vector3D.WorldZ);
if (axis_Y.Length <= tolerance)
{
axis_Y = Vector3D.WorldY;
if (normal.Z > 0)
{
axis_Y.Negate();
}
}
Vector3D axis_X = axis_Y.CrossProduct(normal);
if (axis_X.Length <= tolerance)
{
axis_X = Vector3D.WorldX;
if (normal.Z > 0)
{
axis_X.Negate();
}
}
Plane result = new Plane(plane.Origin, axis_X, axis_Y);
List <Point2D> point2Ds = face3D.ExternalEdgePoint3Ds(tolerance)?.ToList().ConvertAll(x => result.Convert(x));
if (point2Ds == null || point2Ds.Count == 0)
{
return(result);
}
Point2D point2D_Min = point2Ds.Min();
return(new Plane(result.Convert(point2D_Min), axis_X, axis_Y));
}
