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213 lines
8.3 KiB
213 lines
8.3 KiB
/* |
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Copyright 2008 Intel Corporation |
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Use, modification and distribution are subject to the Boost Software License, |
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Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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http://www.boost.org/LICENSE_1_0.txt). |
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*/ |
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#ifndef BOOST_POLYGON_POLYGON_SET_VIEW_HPP |
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#define BOOST_POLYGON_POLYGON_SET_VIEW_HPP |
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namespace boost { namespace polygon{ |
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template <typename coordinate_type> |
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inline void polygon_set_data<coordinate_type>::clean() const { |
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if(dirty_) { |
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polygon_45_set_data<coordinate_type> tmp; |
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//very important: |
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//the 45 degree algorithm does not satisfy |
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//the precondition of arbitrary polygon formation |
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//that vertices be "linearly consistent" |
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//therefore it doesn't work to fall back on 45-degree |
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//booleans for arbitrary angle polygons |
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if(0) { //downcast(tmp) ) { |
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tmp.clean(); |
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data_.clear(); |
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is_45_ = true; |
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polygon_set_data<coordinate_type> tmp2; |
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tmp2.insert(tmp); |
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data_.swap(tmp2.data_); |
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dirty_ = false; |
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sort(); |
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} else { |
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sort(); |
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arbitrary_boolean_op<coordinate_type> abo; |
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polygon_set_data<coordinate_type> tmp2; |
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abo.execute(tmp2, begin(), end(), end(), end(), 0); |
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data_.swap(tmp2.data_); |
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is_45_ = tmp2.is_45_; |
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dirty_ = false; |
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} |
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} |
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} |
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template <> |
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inline void polygon_set_data<double>::clean() const { |
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if(dirty_) { |
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sort(); |
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arbitrary_boolean_op<double> abo; |
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polygon_set_data<double> tmp2; |
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abo.execute(tmp2, begin(), end(), end(), end(), 0); |
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data_.swap(tmp2.data_); |
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is_45_ = tmp2.is_45_; |
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dirty_ = false; |
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} |
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} |
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template <typename value_type, typename arg_type> |
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inline void insert_into_view_arg(value_type& dest, const arg_type& arg); |
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template <typename ltype, typename rtype, int op_type> |
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class polygon_set_view; |
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template <typename ltype, typename rtype, int op_type> |
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struct polygon_set_traits<polygon_set_view<ltype, rtype, op_type> > { |
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typedef typename polygon_set_view<ltype, rtype, op_type>::coordinate_type coordinate_type; |
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typedef typename polygon_set_view<ltype, rtype, op_type>::iterator_type iterator_type; |
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typedef typename polygon_set_view<ltype, rtype, op_type>::operator_arg_type operator_arg_type; |
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static inline iterator_type begin(const polygon_set_view<ltype, rtype, op_type>& polygon_set); |
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static inline iterator_type end(const polygon_set_view<ltype, rtype, op_type>& polygon_set); |
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static inline bool clean(const polygon_set_view<ltype, rtype, op_type>& polygon_set); |
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static inline bool sort(const polygon_set_view<ltype, rtype, op_type>& polygon_set); |
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}; |
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//template <typename value_type, typename geometry_type_1, typename geometry_type_2, int op_type> |
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//void execute_boolean_op(value_type& output_, const geometry_type_1& lvalue_, const geometry_type_2& rvalue_, |
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// double coord) { |
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// typedef geometry_type_1 ltype; |
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// typedef geometry_type_2 rtype; |
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// typedef typename polygon_set_traits<ltype>::coordinate_type coordinate_type; |
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// value_type linput_; |
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// value_type rinput_; |
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// insert_into_view_arg(linput_, lvalue_); |
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// insert_into_view_arg(rinput_, rvalue_); |
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// arbitrary_boolean_op<coordinate_type> abo; |
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// abo.execute(output_, linput_.begin(), linput_.end(), |
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// rinput_.begin(), rinput_.end(), op_type); |
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//} |
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template <typename value_type, typename geometry_type_1, typename geometry_type_2, int op_type> |
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void execute_boolean_op(value_type& output_, const geometry_type_1& lvalue_, const geometry_type_2& rvalue_) { |
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typedef geometry_type_1 ltype; |
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typedef geometry_type_2 rtype; |
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typedef typename polygon_set_traits<ltype>::coordinate_type coordinate_type; |
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value_type linput_; |
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value_type rinput_; |
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insert_into_view_arg(linput_, lvalue_); |
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insert_into_view_arg(rinput_, rvalue_); |
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polygon_45_set_data<coordinate_type> l45, r45, o45; |
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if(linput_.downcast(l45) && rinput_.downcast(r45)) { |
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//the op codes are screwed up between 45 and arbitrary |
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#ifdef BOOST_POLYGON_MSVC |
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#pragma warning (disable: 4127) |
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#endif |
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if(op_type < 2) |
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l45.template applyAdaptiveBoolean_<op_type>(o45, r45); |
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else if(op_type == 2) |
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l45.template applyAdaptiveBoolean_<3>(o45, r45); |
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else |
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l45.template applyAdaptiveBoolean_<2>(o45, r45); |
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#ifdef BOOST_POLYGON_MSVC |
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#pragma warning (default: 4127) |
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#endif |
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output_.insert(o45); |
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} else { |
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arbitrary_boolean_op<coordinate_type> abo; |
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abo.execute(output_, linput_.begin(), linput_.end(), |
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rinput_.begin(), rinput_.end(), op_type); |
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} |
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} |
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template <typename ltype, typename rtype, int op_type> |
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class polygon_set_view { |
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public: |
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typedef typename polygon_set_traits<ltype>::coordinate_type coordinate_type; |
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typedef polygon_set_data<coordinate_type> value_type; |
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typedef typename value_type::iterator_type iterator_type; |
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typedef polygon_set_view operator_arg_type; |
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private: |
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const ltype& lvalue_; |
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const rtype& rvalue_; |
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mutable value_type output_; |
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mutable bool evaluated_; |
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polygon_set_view& operator=(const polygon_set_view&); |
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public: |
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polygon_set_view(const ltype& lvalue, |
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const rtype& rvalue ) : |
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lvalue_(lvalue), rvalue_(rvalue), output_(), evaluated_(false) {} |
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// get iterator to begin vertex data |
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public: |
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const value_type& value() const { |
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if(!evaluated_) { |
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evaluated_ = true; |
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execute_boolean_op<value_type, ltype, rtype, op_type>(output_, lvalue_, rvalue_); |
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} |
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return output_; |
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} |
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public: |
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iterator_type begin() const { return value().begin(); } |
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iterator_type end() const { return value().end(); } |
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bool dirty() const { return false; } //result of a boolean is clean |
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bool sorted() const { return true; } //result of a boolean is sorted |
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void sort() const {} //is always sorted |
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}; |
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template <typename ltype, typename rtype, int op_type> |
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typename polygon_set_traits<polygon_set_view<ltype, rtype, op_type> >::iterator_type |
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polygon_set_traits<polygon_set_view<ltype, rtype, op_type> >:: |
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begin(const polygon_set_view<ltype, rtype, op_type>& polygon_set) { |
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return polygon_set.begin(); |
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} |
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template <typename ltype, typename rtype, int op_type> |
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typename polygon_set_traits<polygon_set_view<ltype, rtype, op_type> >::iterator_type |
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polygon_set_traits<polygon_set_view<ltype, rtype, op_type> >:: |
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end(const polygon_set_view<ltype, rtype, op_type>& polygon_set) { |
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return polygon_set.end(); |
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} |
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template <typename ltype, typename rtype, int op_type> |
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bool polygon_set_traits<polygon_set_view<ltype, rtype, op_type> >:: |
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clean(const polygon_set_view<ltype, rtype, op_type>& ) { |
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return true; } |
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template <typename ltype, typename rtype, int op_type> |
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bool polygon_set_traits<polygon_set_view<ltype, rtype, op_type> >:: |
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sort(const polygon_set_view<ltype, rtype, op_type>& ) { |
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return true; } |
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template <typename value_type, typename arg_type> |
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inline void insert_into_view_arg(value_type& dest, const arg_type& arg) { |
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typedef typename polygon_set_traits<arg_type>::iterator_type literator; |
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literator itr1, itr2; |
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itr1 = polygon_set_traits<arg_type>::begin(arg); |
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itr2 = polygon_set_traits<arg_type>::end(arg); |
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dest.insert(itr1, itr2); |
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} |
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template <typename geometry_type_1, typename geometry_type_2, int op_type> |
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geometry_type_1& self_assignment_boolean_op(geometry_type_1& lvalue_, const geometry_type_2& rvalue_) { |
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typedef geometry_type_1 ltype; |
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typedef typename polygon_set_traits<ltype>::coordinate_type coordinate_type; |
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typedef polygon_set_data<coordinate_type> value_type; |
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value_type output_; |
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execute_boolean_op<value_type, geometry_type_1, geometry_type_2, op_type>(output_, lvalue_, rvalue_); |
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polygon_set_mutable_traits<geometry_type_1>::set(lvalue_, output_.begin(), output_.end()); |
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return lvalue_; |
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} |
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// copy constructor |
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template <typename coordinate_type> |
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template <typename ltype, typename rtype, int op_type> |
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polygon_set_data<coordinate_type>::polygon_set_data(const polygon_set_view<ltype, rtype, op_type>& that) : |
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data_(that.value().data_), dirty_(that.value().dirty_), unsorted_(that.value().unsorted_), is_45_(that.value().is_45_) {} |
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template <typename ltype, typename rtype, int op_type> |
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struct geometry_concept<polygon_set_view<ltype, rtype, op_type> > { typedef polygon_set_concept type; }; |
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} |
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} |
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#endif |
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