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Diffstat (limited to 'source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h')
| -rw-r--r-- | source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h b/source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h new file mode 100644 index 00000000000..0c053bf1845 --- /dev/null +++ b/source/blender/freestyle/intern/stroke/CurveAdvancedIterators.h @@ -0,0 +1,383 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2010 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#ifndef __FREESTYLE_CURVE_ADVANCED_ITERATORS_H__ +#define __FREESTYLE_CURVE_ADVANCED_ITERATORS_H__ + +/** \file blender/freestyle/intern/stroke/CurveAdvancedIterators.h + * \ingroup freestyle + * \brief Iterators used to iterate over the elements of the Curve. Can't be used in python + * \author Stephane Grabli + * \date 01/08/2003 + */ + +#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; + +#if 0 + typedef Vertex vertex_type ; + typedef vertex_container_iterator vertex_iterator_type; + typedef CurvePoint<Vertex> Point; + typedef Point point_type; +#endif + typedef IteratorBase<Traits,BidirectionalIteratorTag_Traits> parent_class; +#if 0 +#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 +#endif + friend class Curve; +#if 0 + friend class Curve::vertex_iterator; + friend class __point_iterator<CurvePoint_nonconst_traits>; + friend class iterator; +#endif +//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: + inline __point_iterator(float step = 0.0f) : parent_class() + { + _step = step; + _CurvilinearLength = 0.0f; + _t = 0.0f; + _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 = 0.0f, float iCurvilinearLength = 0.0f) + : 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; + } + + /* Operator corresponding to i++, i.e. it returns the value *and then* increments. + * That’s why we store the value in a temp. + */ + inline Self operator++(int) + { + Self tmp = *this; + increment(); + return tmp; + } + + inline Self& operator--() // operator corresponding to --i + { + decrement(); + return *this; + } + + inline Self operator--(int) // operator corresponding to i-- + { + Self tmp = *this; + decrement(); + 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*()); + } + + 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 == 1.0f)) { + // we're setting the iterator to end + ++__A; + ++__B; + ++_currentn; + _t = 0.0f; + 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 = 1.0f; + 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 = 1.0f; // 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 = 1.0f; + } + else { + _t = 0.0f; + ++_currentn; + ++__A; + ++__B; + } + } + } + + virtual void decrement() + { + if (_Point != 0) { + delete _Point; + _Point = 0; + } + + if (_t == 0.0f) { // we're at the beginning of the edge + _t = 1.0f; + --_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 = -1.0f; // We just need a negative value here + } + + // round value + if (fabs(_t) < (float)M_EPSILON) + _t = 0.0f; + if (_t < 0) { + if (_currentn == 0) + _CurvilinearLength = 0.0f; + else + _CurvilinearLength += normAB * (-_t); + _t = 0.0f; + } + } +}; + +} // end of namespace CurveInternal + +#endif // __FREESTYLE_CURVE_ADVANCED_ITERATORS_H__ |