KnotvectorT.hh

/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openflipper.org                            *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenFlipper.                                         *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
 *                                                                           *
 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
*                                                                            *
\*===========================================================================*/

/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
\*===========================================================================*/


//=============================================================================
//
//  CLASS KnotvectorT
//  Author:  Ellen Dekkers <dekkers@cs.rwth-aachen.de>
//
//=============================================================================


#ifndef ACG_KNOTVECTORT_HH
#define ACG_KNOTVECTORT_HH

//== INCLUDES =================================================================

#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <cassert>


//== FORWARDDECLARATIONS ======================================================

//== NAMESPACES ===============================================================

namespace ACG {

//== CLASS DEFINITION =========================================================


template< typename Scalar >
class KnotvectorT {

public:

  enum KnotvectorType {
    UNIFORM_INTERPOL = 0,
    UNIFORM = 1,
  };

  KnotvectorT();

  KnotvectorT(const KnotvectorT& _knotvec);

  ~KnotvectorT();

  void setType(KnotvectorType _type);

  void createKnots(unsigned int _splineDeg, unsigned int _dim);

  inline std::vector< Scalar >& getKnotvector() {return knots_;}
  inline const std::vector< Scalar >& getKnotvector() const { return knots_; }

  inline unsigned int size() const {return knots_.size();}

  inline Scalar getKnot(unsigned int _index) const {
    assert(_index < knots_.size());
    return knots_.at(_index);
  }

  void setKnotvector(const std::vector< Scalar >& _knots);

  void resize(unsigned int _size) {knots_.resize(_size);}

  void insertKnot(unsigned int _index, const Scalar _knot);

  void addKnot(Scalar _knot);

  inline void setKnot(unsigned int _index, Scalar _knot) {
    assert(_index < knots_.size());
    knots_.at(_index) = _knot;
  }

  void deleteKnot(unsigned int _index);


  inline Scalar & operator()(unsigned int _index) {
    assert (_index < knots_.size());
    return knots_[_index];
  }

  inline const Scalar & operator()(unsigned int _index) const {
    assert (_index < knots_.size());
    return knots_[_index];
  }

  void clear() {knots_.clear();};



public :  // selection handling

  // request properties
  void request_selections() { request_prop( ref_count_selections_, selections_);}

  // release properties
  void release_selections() { release_prop( ref_count_selections_, selections_);}

  // property availability
  bool selections_available() const {return bool(ref_count_selections_);}

  // property access ( no range or availability check! )
  unsigned char& selection(unsigned int _i) {
    assert(_i < selections_.size());
    assert(selections_available());
    return selections_[_i];
  }
  const unsigned char& selection(unsigned int _i) const {
    assert(_i < selections_.size());
    assert(selections_available());
    return selections_[_i];
  }
  
  // Wrapper for selection functions
  void select(unsigned int _pIdx) { selection(_pIdx) = 1; };
  void deselect(unsigned int _pIdx) { selection(_pIdx) = 0; };
  
  bool selected(unsigned int _pIdx) const { return (selection(_pIdx) == 1); };


private:

  template <class PropT>
  void request_prop( unsigned int& _ref_count, PropT& _prop);

  template <class PropT>
  void release_prop( unsigned int& _ref_count, PropT& _prop);

  // ############################### Standard Property Handling #############################

  // properties
  std::vector<unsigned char>   selections_;

  // property reference counter
  unsigned int ref_count_selections_;

private:

  std::vector<Scalar> knots_;

  KnotvectorType knotvectorType_;

  void createUniformInterpolatingKnots(unsigned int _splineDeg, unsigned int _dim);

  void createUniformKnots(unsigned int _splineDeg, unsigned int _dim);

  unsigned int num_control_points_;
  unsigned int spline_degree_;

};

typedef  ACG::KnotvectorT< double > Knotvector;


template< typename Scalar >
inline std::ostream& operator<<(std::ostream& _stream, const KnotvectorT< Scalar >& _knotvector) {

  KnotvectorT< Scalar > knotvector = _knotvector;
  for (unsigned int i = 0; i < knotvector.size(); i++)
    _stream << knotvector(i) << " ";

  return _stream;
}


template< typename Scalar >
inline std::istream& operator>>(std::istream& _is, KnotvectorT< Scalar >& _knotvector) {

  unsigned int size(0);
  _is >> size;
  _knotvector.resize(size);
  for (unsigned int i = 0; i < size; i++)
    _is >> _knotvector(i);

  return _is;
}


}

//=============================================================================
#if defined(INCLUDE_TEMPLATES) && !defined(ACG_KNOTVECTORT_C)
#define ACG_KNOTVECTORT_TEMPLATES
#include "KnotvectorT.cc"
#endif
//=============================================================================
#endif // ACG_KNOTVECTORT_HH defined
//=============================================================================