public Points.Point PointAt(double u, double v)
{
if (!DomainU.Containts(u) || !DomainV.Containts(v))
{
return(null);
}
return(Function(u, v));
}
public Points.Point PointAt(double u, double v)
{
if (!DomainU.Containts(u) || !DomainV.Containts(v))
{
return(null);
}
double den = 0;
var knot = GetSortedKnot();
var result = Points.Point.GetZero(ControlPoints.Dimension);
for (int i = 0; i < uCount; i++)
{
for (int j = 0; j < vCount; j++)
{
var a = Functions.DeBoorCoxAlgorithm(i, degreeU, u, knot) * Functions.DeBoorCoxAlgorithm(j, degreeV, v, knot) * GetControlPoint(i, j).Weight;
den += a;
result += a * GetControlPoint(i, j).Point;
}
}
return(result / den);
}