#ifndef BEZIER_H
#define BEZIER_H
#include "igl_inline.h"
#include <Eigen/Core>
#include <vector>
namespace igl
{
  /// Evaluate a polynomial Bezier Curve at single parameter value.
  ///
  /// @param[in] V  #V by dim list of Bezier control points
  /// @param[in] t  evaluation parameter within [0,1]
  /// @param[out] P  1 by dim output point 
  template <typename DerivedV, typename DerivedP>
  IGL_INLINE void bezier(
    const Eigen::MatrixBase<DerivedV> & V,
    const typename DerivedV::Scalar t,
    Eigen::PlainObjectBase<DerivedP> & P);
  /// Evaluate a polynomial Bezier Curve at many parameter values.
  ///
  /// @param[in] V  #V by dim list of Bezier control points
  /// @param[in] T  #T evaluation parameters within [0,1]
  /// @param[out] P  #T  by dim output points
  template <typename DerivedV, typename DerivedT, typename DerivedP>
  IGL_INLINE void bezier(
    const Eigen::MatrixBase<DerivedV> & V,
    const Eigen::MatrixBase<DerivedT> & T,
    Eigen::PlainObjectBase<DerivedP> & P);
  /// Evaluate a polynomial Bezier spline with a fixed parameter set for each
  /// sub-curve.
  ///
  /// @tparam VMat  type of matrix of each list of control points
  /// @tparam DerivedT  Derived type of evaluation parameters
  /// @tparam DerivedP  Derived type of output points
  /// @param[in] spline #curves list of lists of Bezier control points
  /// @param[in] T  #T evaluation parameters within [0,1] to use for each spline
  /// @param[out] P  #curves*#T  by dim output points
  template <typename VMat, typename DerivedT, typename DerivedP>
  IGL_INLINE void bezier(
    const std::vector<VMat> & spline,
    const Eigen::MatrixBase<DerivedT> & T,
    Eigen::PlainObjectBase<DerivedP> & P);
}

#ifndef IGL_STATIC_LIBRARY
#  include "bezier.cpp"
#endif

#endif