AcGeNurbCurve3d::AcGeNurbCurve3d

C++
AcGeNurbCurve3d(
    int degree, 
    const AcGeKnotVector& knots, 
    const AcGePoint3dArray& cntrlPnts, 
    Adesk::Boolean isPeriodic = Adesk::kFalse
);
Parameters
Parameters 
Description 
int degree 
Input degree of spline 
const AcGeKnotVector& knots 
Input array of knot values, partitioning spline's domain into polynomial pieces 
const AcGePoint3dArray& cntrlPnts 
Input array of 3D control points 
Adesk::Boolean isPeriodic = Adesk::kFalse 
Input flag indicating if spline is a closed curve 
Description

If isPeriodic = Adesk::kFalse then the length of knot vector must be greater than the length of the control array by degree+1. 

If isPeriodic = Adesk::kTrue then one of the following must be true:

  • length of the knot vector must be greater than length of the control array by 1. The first and the last control points must not be identical.
  • knot vector and control array must have same length, and the first and the last control points must be identical.
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