/// <summary>
/// The points index example is as following.
/// The reason for this setting is to look at the coordinate like points[x][y].
/// As a result, The number of U count is 3 and that of V count is 5.
///
/// 3*---7*--11*
/// | | |
/// 2*---6*--10*
/// | | |
/// 1*---5*---9*
/// | | |
/// 0*---4*---8*
///
/// </summary>
/// <param name="_pointsGrid"></param>
public NURBSSurface(IEnumerable <IEnumerable <IEnumerable <double> > > _pointsGrid, KnotSet uKnotVector, KnotSet vKnotVector, int uDegree, int vDegree, IEnumerable <IEnumerable <double> > _weights)
{
List <List <Point3d> > ptss = new List <List <Point3d> >();
List <List <double> > wss = new List <List <double> >();
for (int i = 0; i < _pointsGrid.Count(); i++)
{
wss.Add(new List <double>());
var ws = _weights.ElementAt(i);
ptss.Add(new List <Point3d>());
var pts = _pointsGrid.ElementAt(i);
for (int j = 0; j < pts.Count(); j++)
{
double w = ws.ElementAt(j);
wss.Last().Add(w);
IEnumerable <double> pt = pts.ElementAt(j);
Point3d target = new Point3d(pt);
ptss.Last().Add(target);
}
}
this.pointsGrid = ptss.Select(n => n.ToArray()).ToArray();
this.weights = wss.Select(n => n.ToArray()).ToArray();
this.uKnotVector = (KnotSet)uKnotVector.Clone();
this.vKnotVector = (KnotSet)vKnotVector.Clone();
this.uDegree = uDegree;
this.vDegree = vDegree;
}
public BSplineCurve(IEnumerable <IEnumerable <double> > pts, KnotSet knots, int degree)
{
var pointList = new List <Point3d>();
foreach (var pt in pts)
{
Point3d pt3d = new Point3d(pt.ToArray());
pointList.Add(pt3d);
}
this.points = pointList.ToArray();
this.knotVector = (KnotSet)knots.Clone();
this.degree = degree;
}
public BSplineBasisInfo(int i, int j, KnotSet knots)
{
this.I = i;
this.J = j;
this.Knots = (KnotSet)knots.Clone();
}