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Diffstat (limited to 'source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h')
| -rwxr-xr-x | source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h b/source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h new file mode 100755 index 00000000000..dfc9f2719f8 --- /dev/null +++ b/source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h @@ -0,0 +1,378 @@ +// +// Filename : CurveAdvancedIterators.h +// Author(s) : Stephane Grabli +// Purpose : Iterators used to iterate over the elements of the Curve +// Can't be used in python +// Date of creation : 01/08/2003 +// +/////////////////////////////////////////////////////////////////////////////// + + +// +// Copyright (C) : Please refer to the COPYRIGHT file distributed +// with this source distribution. +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +// +/////////////////////////////////////////////////////////////////////////////// + +#ifndef ADVANCEDCURVEITERATORS_H +# define ADVANCEDCURVEITERATORS_H + +# include "Stroke.h" + +namespace CurveInternal { + + class CurvePoint_const_traits : public Const_traits<CurvePoint*> { + public: + typedef deque<CurvePoint*> vertex_container; + typedef vertex_container::const_iterator vertex_container_iterator; + typedef SVertex vertex_type; + }; + + class CurvePoint_nonconst_traits : public Nonconst_traits<CurvePoint*> { + public: + typedef deque<CurvePoint*> vertex_container; + typedef vertex_container::iterator vertex_container_iterator ; + typedef SVertex vertex_type; + }; + + /**********************************/ + /* */ + /* */ + /* CurvePoint Iterator */ + /* */ + /* */ + /**********************************/ + + + /*! iterator on a curve. Allows an iterating outside + * initial vertices. A CurvePoint is instanciated an returned + * when the iterator is dereferenced. + */ + + template<class Traits> + class __point_iterator : public IteratorBase<Traits, BidirectionalIteratorTag_Traits> + { + public: + typedef __point_iterator <Traits> Self; + typedef typename Traits::vertex_container_iterator vertex_container_iterator; + typedef typename Traits::vertex_type vertex_type; + typedef CurvePoint Point; + typedef Point point_type; + + typedef __point_iterator<CurvePoint_nonconst_traits > iterator; + typedef __point_iterator<CurvePoint_const_traits > const_iterator; + + // public: + // typedef Vertex vertex_type ; + // typedef vertex_container_iterator vertex_iterator_type; + // typedef CurvePoint<Vertex> Point; + // typedef Point point_type; + typedef IteratorBase<Traits,BidirectionalIteratorTag_Traits> parent_class; + //# if defined(__GNUC__) && (__GNUC__ < 3) + // typedef bidirectional_iterator<CurvePoint<Vertex>,ptrdiff_t> bidirectional_point_iterator; + //# else + // typedef iterator<bidirectional_iterator_tag, CurvePoint<Vertex>,ptrdiff_t> bidirectional_point_iterator; + //# endif + friend class Curve; + //friend class Curve::vertex_iterator; + //friend class __point_iterator<CurvePoint_nonconst_traits >; + //friend class iterator; + //protected: + public: + float _CurvilinearLength; + float _step; + vertex_container_iterator __A; + vertex_container_iterator __B; + vertex_container_iterator _begin; + vertex_container_iterator _end; + int _n; + int _currentn; + float _t; + mutable Point *_Point; + + public: + + public: + inline __point_iterator(float step = 0.f) + : parent_class() + { + _step = step; + _CurvilinearLength = 0.f; + _t = 0.f; + _Point = 0; + _n = 0; + _currentn = 0; + } + + inline __point_iterator(const iterator& iBrother) + : parent_class() + { + __A = iBrother.__A; + __B = iBrother.__B; + _begin = iBrother._begin; + _end = iBrother._end; + _CurvilinearLength = iBrother._CurvilinearLength; + _step = iBrother._step; + _t = iBrother._t; + if(iBrother._Point == 0) + _Point = 0; + else + _Point = new Point(*(iBrother._Point)); + _n = iBrother._n; + _currentn = iBrother._currentn; + } + inline __point_iterator(const const_iterator& iBrother) + : parent_class() + { + __A = iBrother.__A; + __B = iBrother.__B; + _begin = iBrother._begin; + _end = iBrother._end; + _CurvilinearLength = iBrother._CurvilinearLength; + _step = iBrother._step; + _t = iBrother._t; + if(iBrother._Point == 0) + _Point = 0; + else + _Point = new Point(*(iBrother._Point)); + _n = iBrother._n; + _currentn = iBrother._currentn; + } + inline Self& operator=(const Self& iBrother) + { + //((bidirectional_point_iterator*)this)->operator=(iBrother); + __A = iBrother.__A; + __B = iBrother.__B; + _begin = iBrother._begin; + _end = iBrother._end; + _CurvilinearLength = iBrother._CurvilinearLength; + _step = iBrother._step; + _t = iBrother._t; + if(iBrother._Point == 0) + _Point = 0; + else + _Point = new Point(*(iBrother._Point)); + _n = iBrother._n; + _currentn = iBrother._currentn; + return *this; + } + virtual ~__point_iterator() + { + if(_Point != 0) + delete _Point; + } + //protected://FIXME + public: + inline __point_iterator(vertex_container_iterator iA, + vertex_container_iterator iB, + vertex_container_iterator ibegin, + vertex_container_iterator iend, + int currentn, + int n, + float step, float t=0.f, float iCurvilinearLength = 0.f) + : parent_class() + { + __A = iA; + __B = iB; + _begin = ibegin; + _end = iend; + _CurvilinearLength = iCurvilinearLength; + _step = step; + _t = t; + _Point = 0; + _n = n; + _currentn = currentn; + } + + public: + + // operators + inline Self& operator++() // operator corresponding to ++i + { + increment(); + return *this; + } + inline Self operator++(int) // opérateur correspondant à i++ + { // c.a.d qui renvoie la valeur *puis* incrémente. + Self tmp = *this; // C'est pour cela qu'on stocke la valeur + increment(); // dans un temporaire. + return tmp; + } + inline Self& operator--() // operator corresponding to ++i + { + decrement(); + return *this; + } + inline Self operator--(int) // opérateur correspondant à i++ + { // c.a.d qui renvoie la valeur *puis* incrémente. + Self tmp = *this; // C'est pour cela qu'on stocke la valeur + decrement(); // dans un temporaire. + return tmp; + } + + // comparibility + virtual bool operator!=(const Self& b) const + { + return ((__A!=b.__A) || (__B!=b.__B) || (_t != b._t)); + } + virtual bool operator==(const Self& b) const + { + return !(*this != b); + } + + // dereferencing + virtual typename Traits::reference operator*() const + { + if(_Point != 0) + { + delete _Point; + _Point = 0; + } + if((_currentn < 0) || (_currentn >= _n)) + return _Point; // 0 in this case + return (_Point = new Point(*__A,*__B,_t)); + } + virtual typename Traits::pointer operator->() const { return &(operator*());} + + public: + virtual bool begin() const + { + if((__A == _begin) && (_t < (float)M_EPSILON)) + return true; + return false; + } + virtual bool end() const + { + if((__B == _end)) + return true; + return false; + } + protected: + virtual void increment() + { + if(_Point != 0) + { + delete _Point; + _Point = 0; + } + if((_currentn == _n-1) && (_t == 1.f)) + { + // we're setting the iterator to end + ++__A; + ++__B; + ++_currentn; + _t = 0.f; + return; + } + + if(0 == _step) // means we iterate over initial vertices + { + Vec3r vec_tmp((*__B)->point2d() - (*__A)->point2d()); + _CurvilinearLength += vec_tmp.norm(); + if(_currentn == _n-1) + { + _t = 1.f; + return; + } + ++__B; + ++__A; + ++_currentn; + return; + } + + // compute the new position: + Vec3r vec_tmp2((*__A)->point2d() - (*__B)->point2d()); + float normAB = vec_tmp2.norm(); + + if(normAB > M_EPSILON) + { + _CurvilinearLength += _step; + _t = _t + _step/normAB; + } + else + _t = 1.f; // AB is a null segment, we're directly at its end + //if normAB ~= 0, we don't change these values + if(_t >= 1) + { + _CurvilinearLength -= normAB*(_t-1); + if(_currentn == _n-1) + _t=1.f; + else + { + _t = 0.f; + ++_currentn; + ++__A;++__B; + } + } + } + virtual void decrement() + { + if(_Point != 0) + { + delete _Point; + _Point = 0; + } + + if(_t == 0.f) //we're at the beginning of the edge + { + _t = 1.f; + --_currentn; + --__A; --__B; + if(_currentn == _n-1) + return; + } + + if(0 == _step) // means we iterate over initial vertices + { + Vec3r vec_tmp((*__B)->point2d() - (*__A)->point2d()); + _CurvilinearLength -= vec_tmp.norm(); + _t = 0; + return; + } + + // compute the new position: + Vec3r vec_tmp2((*__A)->point2d() - (*__B)->point2d()); + float normAB = vec_tmp2.norm(); + + if(normAB >M_EPSILON) + { + _CurvilinearLength -= _step; + _t = _t - _step/normAB; + } + else + _t = -1.f; // We just need a negative value here + + // round value + if(fabs(_t) < (float)M_EPSILON) + _t = 0.0; + if(_t < 0) + { + if(_currentn == 0) + _CurvilinearLength = 0.f; + else + _CurvilinearLength += normAB*(-_t); + _t = 0.f; + } + } + }; + + + +} // end of namespace StrokeInternal + + +#endif // ADVANCEDCURVEITERATORS_H |