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133 lines
3.9 KiB
133 lines
3.9 KiB
//---------------------------------------------------------------------------- |
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// Anti-Grain Geometry - Version 2.3 |
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) |
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// |
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// Permission to copy, use, modify, sell and distribute this software |
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// is granted provided this copyright notice appears in all copies. |
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// This software is provided "as is" without express or implied |
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// warranty, and with no claim as to its suitability for any purpose. |
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// |
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//---------------------------------------------------------------------------- |
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// Contact: mcseem@antigrain.com |
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// mcseemagg@yahoo.com |
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// http://www.antigrain.com |
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//---------------------------------------------------------------------------- |
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// |
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// classes: vertex_iterator |
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// vertex_source_adaptor |
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// vertex_source_adaptor_with_id |
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// |
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//---------------------------------------------------------------------------- |
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#ifndef AGG_VERTEX_ITERATOR_INCLUDED |
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#define AGG_VERTEX_ITERATOR_INCLUDED |
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#include "agg_basics.h" |
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namespace agg |
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{ |
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//---------------------------------------------------------vertex_iterator |
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template<class VertexSource> class vertex_iterator |
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{ |
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public: |
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vertex_iterator() {} |
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vertex_iterator(unsigned cmd) { m_vertex.cmd = cmd; } |
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vertex_iterator(const vertex_iterator& i) : m_vs(i.m_vs), m_vertex(i.m_vertex) {} |
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vertex_iterator(VertexSource& vs, unsigned id) : m_vs(&vs) |
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{ |
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m_vs->rewind(id); |
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m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y); |
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} |
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vertex_iterator& operator++() |
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{ |
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m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y); |
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return *this; |
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} |
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const vertex_type& operator*() const { return m_vertex; } |
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const vertex_type* operator->() const { return &m_vertex; } |
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bool operator != (const vertex_iterator& i) |
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{ |
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return m_vertex.cmd != i.m_vertex.cmd; |
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} |
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private: |
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VertexSource* m_vs; |
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vertex_type m_vertex; |
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}; |
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//---------------------------------------------------vertex_source_adaptor |
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template<class VertexContainer> class vertex_source_adaptor |
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{ |
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public: |
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vertex_source_adaptor(const VertexContainer& container) : |
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m_container(&container) {} |
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void rewind(unsigned) |
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{ |
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m_iterator = m_container->begin(); |
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m_end = m_container->end(); |
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} |
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unsigned vertex(double* x, double* y) |
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{ |
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unsigned cmd = path_cmd_stop; |
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if(m_iterator != m_end) |
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{ |
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*x = m_iterator->x; |
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*y = m_iterator->y; |
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cmd = m_iterator->cmd; |
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++m_iterator; |
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} |
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return cmd; |
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} |
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private: |
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const VertexContainer* m_container; |
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typename VertexContainer::const_iterator m_iterator; |
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typename VertexContainer::const_iterator m_end; |
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}; |
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//-------------------------------------------vertex_source_adaptor_with_id |
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template<class VertexContainer> class vertex_source_adaptor_with_id |
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{ |
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public: |
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vertex_source_adaptor_with_id(const VertexContainer& container) : |
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m_container(&container) {} |
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void rewind(unsigned id) |
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{ |
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m_iterator = m_container->begin(id); |
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m_end = m_container->end(); |
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} |
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unsigned vertex(double* x, double* y) |
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{ |
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unsigned cmd = path_cmd_stop; |
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if(m_iterator != m_end) |
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{ |
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*x = m_iterator->x; |
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*y = m_iterator->y; |
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cmd = m_iterator->cmd; |
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++m_iterator; |
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} |
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return cmd; |
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} |
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private: |
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const VertexContainer* m_container; |
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typename VertexContainer::const_iterator m_iterator; |
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typename VertexContainer::const_iterator m_end; |
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}; |
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} |
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#endif
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