| |
| //---------------------------------------------------------------------------- |
| // Anti-Grain Geometry - Version 2.3 |
| // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) |
| // |
| // Permission to copy, use, modify, sell and distribute this software |
| // is granted provided this copyright notice appears in all copies. |
| // This software is provided "as is" without express or implied |
| // warranty, and with no claim as to its suitability for any purpose. |
| // |
| //---------------------------------------------------------------------------- |
| // Contact: mcseem@antigrain.com |
| // mcseemagg@yahoo.com |
| // http://www.antigrain.com |
| //---------------------------------------------------------------------------- |
| // |
| // vertex_sequence container and vertex_dist struct |
| // |
| //---------------------------------------------------------------------------- |
| #ifndef AGG_VERTEX_SEQUENCE_INCLUDED |
| #define AGG_VERTEX_SEQUENCE_INCLUDED |
| #include "agg_basics.h" |
| #include "agg_array.h" |
| #include "agg_math.h" |
| namespace agg |
| { |
| template<class T, unsigned S = 6> |
| class vertex_sequence : public pod_deque<T, S> |
| { |
| public: |
| typedef pod_deque<T, S> base_type; |
| void add(const T& val); |
| void modify_last(const T& val); |
| void close(bool remove_flag); |
| }; |
| template<class T, unsigned S> |
| void vertex_sequence<T, S>::add(const T& val) |
| { |
| if(base_type::size() > 1) { |
| if(!(*this)[base_type::size() - 2]((*this)[base_type::size() - 1])) { |
| base_type::remove_last(); |
| } |
| } |
| base_type::add(val); |
| } |
| template<class T, unsigned S> |
| void vertex_sequence<T, S>::modify_last(const T& val) |
| { |
| base_type::remove_last(); |
| add(val); |
| } |
| template<class T, unsigned S> |
| void vertex_sequence<T, S>::close(bool closed) |
| { |
| while(base_type::size() > 1) { |
| if((*this)[base_type::size() - 2]((*this)[base_type::size() - 1])) { |
| break; |
| } |
| T t = (*this)[base_type::size() - 1]; |
| base_type::remove_last(); |
| modify_last(t); |
| } |
| if(closed) { |
| while(base_type::size() > 1) { |
| if((*this)[base_type::size() - 1]((*this)[0])) { |
| break; |
| } |
| base_type::remove_last(); |
| } |
| } |
| } |
| const FX_FLOAT vertex_dist_epsilon = 1e-14f; |
| struct vertex_dist { |
| FX_FLOAT x; |
| FX_FLOAT y; |
| FX_FLOAT dist; |
| vertex_dist() {} |
| vertex_dist(FX_FLOAT x_, FX_FLOAT y_) : |
| x(x_), |
| y(y_), |
| dist(0) |
| { |
| } |
| bool operator () (const vertex_dist& val) |
| { |
| bool ret = (dist = calc_distance(x, y, val.x, val.y)) > vertex_dist_epsilon; |
| return ret; |
| } |
| }; |
| struct vertex_dist_cmd : public vertex_dist { |
| unsigned cmd; |
| vertex_dist_cmd() {} |
| vertex_dist_cmd(FX_FLOAT x_, FX_FLOAT y_, unsigned cmd_) : |
| vertex_dist(x_, y_), |
| cmd(cmd_) |
| { |
| } |
| }; |
| } |
| #endif |
