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Added a default constructor for Splines which creates zero (constant) splines.

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This commit is contained in:
Hauke Heibel 2012-07-28 13:37:29 +02:00
parent f23dd7c6f1
commit 52a0e0d65e
1 changed files with 15 additions and 0 deletions
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15
unsupported/Eigen/src/Splines/Spline.h
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@ -50,6 +50,21 @@ namespace Eigen
/** \brief The data type representing the spline's control points. */ /** \brief The data type representing the spline's control points. */
typedef typename SplineTraits<Spline>::ControlPointVectorType ControlPointVectorType; typedef typename SplineTraits<Spline>::ControlPointVectorType ControlPointVectorType;
/**
* \brief Creates a (constant) zero spline.
* For Splines with dynamic degree, the resulting degree will be 0.
**/
Spline()
: m_knots(1, (Degree==Dynamic ? 2 : 2*Degree+2))
, m_ctrls(ControlPointVectorType::Zero(2,(Degree==Dynamic ? 1 : Degree+1)))
{
// in theory this code can go to the initializer list but it will get pretty
// much unreadable ...
enum { MinDegree = (Degree==Dynamic ? 0 : Degree) };
m_knots.template segment<MinDegree+1>(0) = Array<Scalar,1,MinDegree+1>::Zero();
m_knots.template segment<MinDegree+1>(MinDegree+1) = Array<Scalar,1,MinDegree+1>::Ones();
}
/** /**
* \brief Creates a spline from a knot vector and control points. * \brief Creates a spline from a knot vector and control points.