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<h1>boost/geometry/policies/relate/direction.hpp</h1><a href="direction_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Boost.Geometry (aka GGL, Generic Geometry Library)</span>
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<a name="l00002"></a>00002 <span class="comment">//</span>
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<a name="l00003"></a>00003 <span class="comment">// Copyright Barend Gehrels 2007-2009, Geodan, Amsterdam, the Netherlands.</span>
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<a name="l00004"></a>00004 <span class="comment">// Copyright Bruno Lalande 2008, 2009</span>
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<a name="l00005"></a>00005 <span class="comment">// Use, modification and distribution is subject to the Boost Software License,</span>
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<a name="l00006"></a>00006 <span class="comment">// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span>
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<a name="l00007"></a>00007 <span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span>
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<a name="l00008"></a>00008
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<a name="l00009"></a>00009 <span class="preprocessor">#ifndef BOOST_GEOMETRY_GEOMETRY_POLICIES_RELATE_DIRECTION_HPP</span>
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<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define BOOST_GEOMETRY_GEOMETRY_POLICIES_RELATE_DIRECTION_HPP</span>
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<a name="l00011"></a>00011 <span class="preprocessor"></span>
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<a name="l00012"></a>00012 <span class="preprocessor">#include <boost/concept_check.hpp></span>
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<a name="l00013"></a>00013
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<a name="l00014"></a>00014 <span class="preprocessor">#include <<a class="code" href="side__info_8hpp.html">boost/geometry/strategies/side_info.hpp</a>></span>
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016 <span class="preprocessor">#include <<a class="code" href="math_8hpp.html">boost/geometry/util/math.hpp</a>></span>
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<a name="l00017"></a>00017 <span class="preprocessor">#include <<a class="code" href="select__calculation__type_8hpp.html">boost/geometry/util/select_calculation_type.hpp</a>></span>
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<a name="l00018"></a>00018 <span class="preprocessor">#include <<a class="code" href="select__most__precise_8hpp.html">boost/geometry/util/select_most_precise.hpp</a>></span>
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<a name="l00019"></a>00019
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<a name="l00020"></a>00020
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<a name="l00021"></a>00021 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>geometry
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<a name="l00022"></a>00022 {
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<a name="l00023"></a>00023
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<a name="l00024"></a>00024
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<a name="l00025"></a>00025 <span class="keyword">namespace </span>policies { <span class="keyword">namespace </span>relate {
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<a name="l00026"></a>00026
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<a name="l00027"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">00027</a> <span class="keyword">struct </span><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">direction_type</a>
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<a name="l00028"></a>00028 {
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||
<a name="l00029"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#901197a06666fbae8e564e6c866b2b12">00029</a> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#901197a06666fbae8e564e6c866b2b12">direction_type</a>(<a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> <span class="keyword">const</span>& s, <span class="keywordtype">char</span> h,
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<a name="l00030"></a>00030 <span class="keywordtype">int</span> ha, <span class="keywordtype">int</span> hb,
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<a name="l00031"></a>00031 <span class="keywordtype">int</span> da = 0, <span class="keywordtype">int</span> db = 0,
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<a name="l00032"></a>00032 <span class="keywordtype">bool</span> op = <span class="keyword">false</span>)
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<a name="l00033"></a>00033 : <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#696f3c02934d0dd70860ffe8ffee859f">how</a>(h)
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<a name="l00034"></a>00034 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#8dd129a7d95c45aff44999d6afa8e889">opposite</a>(op)
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<a name="l00035"></a>00035 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#6f4ad325157f97988e289bb9c4e0e20c">how_a</a>(ha)
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||
<a name="l00036"></a>00036 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#77af889be14d4cc94976d528b4b4f764">how_b</a>(hb)
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||
<a name="l00037"></a>00037 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#4e4c66bd11483ea8152996e8b122d150">dir_a</a>(da)
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<a name="l00038"></a>00038 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#df151fc28e423ed81bd61326d6e1a7e5">dir_b</a>(db)
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||
<a name="l00039"></a>00039 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#a694ffa082013a8b6a4051d0fda6ff14">sides</a>(s)
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<a name="l00040"></a>00040 {
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||
<a name="l00041"></a>00041 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[0] = ha;
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||
<a name="l00042"></a>00042 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[1] = hb;
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||
<a name="l00043"></a>00043 }
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||
<a name="l00044"></a>00044
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||
<a name="l00045"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#7e4950a55885b6f166d6faa54abe25e0">00045</a> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#901197a06666fbae8e564e6c866b2b12">direction_type</a>(<span class="keywordtype">char</span> h, <span class="keywordtype">bool</span> op, <span class="keywordtype">int</span> ha = 0, <span class="keywordtype">int</span> hb = 0)
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||
<a name="l00046"></a>00046 : <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#696f3c02934d0dd70860ffe8ffee859f">how</a>(h)
|
||
<a name="l00047"></a>00047 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#8dd129a7d95c45aff44999d6afa8e889">opposite</a>(op)
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||
<a name="l00048"></a>00048 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#6f4ad325157f97988e289bb9c4e0e20c">how_a</a>(ha)
|
||
<a name="l00049"></a>00049 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#77af889be14d4cc94976d528b4b4f764">how_b</a>(hb)
|
||
<a name="l00050"></a>00050 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#4e4c66bd11483ea8152996e8b122d150">dir_a</a>(0)
|
||
<a name="l00051"></a>00051 , <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#df151fc28e423ed81bd61326d6e1a7e5">dir_b</a>(0)
|
||
<a name="l00052"></a>00052 {
|
||
<a name="l00053"></a>00053 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[0] = ha;
|
||
<a name="l00054"></a>00054 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[1] = hb;
|
||
<a name="l00055"></a>00055 }
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||
<a name="l00056"></a>00056
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||
<a name="l00057"></a>00057
|
||
<a name="l00058"></a>00058 <span class="comment">// "How" is the intersection formed?</span>
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||
<a name="l00059"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#696f3c02934d0dd70860ffe8ffee859f">00059</a> <span class="keywordtype">char</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#696f3c02934d0dd70860ffe8ffee859f">how</a>;
|
||
<a name="l00060"></a>00060
|
||
<a name="l00061"></a>00061 <span class="comment">// Is it opposite (for collinear/equal cases)</span>
|
||
<a name="l00062"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#8dd129a7d95c45aff44999d6afa8e889">00062</a> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#8dd129a7d95c45aff44999d6afa8e889">opposite</a>;
|
||
<a name="l00063"></a>00063
|
||
<a name="l00064"></a>00064 <span class="comment">// Information on how A arrives at intersection, how B arrives at intersection</span>
|
||
<a name="l00065"></a>00065 <span class="comment">// 1: arrives at intersection</span>
|
||
<a name="l00066"></a>00066 <span class="comment">// -1: starts from intersection</span>
|
||
<a name="l00067"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#6f4ad325157f97988e289bb9c4e0e20c">00067</a> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#6f4ad325157f97988e289bb9c4e0e20c">how_a</a>;
|
||
<a name="l00068"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#77af889be14d4cc94976d528b4b4f764">00068</a> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#77af889be14d4cc94976d528b4b4f764">how_b</a>;
|
||
<a name="l00069"></a>00069
|
||
<a name="l00070"></a>00070 <span class="comment">// Direction: how is A positioned from B</span>
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||
<a name="l00071"></a>00071 <span class="comment">// 1: points left, seen from IP</span>
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||
<a name="l00072"></a>00072 <span class="comment">// -1: points right, seen from IP</span>
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||
<a name="l00073"></a>00073 <span class="comment">// In case of intersection: B's TO direction</span>
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||
<a name="l00074"></a>00074 <span class="comment">// In case that B's TO direction is at A: B's from direction</span>
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||
<a name="l00075"></a>00075 <span class="comment">// In collinear cases: it is 0</span>
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||
<a name="l00076"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#4e4c66bd11483ea8152996e8b122d150">00076</a> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#4e4c66bd11483ea8152996e8b122d150">dir_a</a>; <span class="comment">// Direction of A-s TO from IP</span>
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||
<a name="l00077"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#df151fc28e423ed81bd61326d6e1a7e5">00077</a> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#df151fc28e423ed81bd61326d6e1a7e5">dir_b</a>; <span class="comment">// Direction of B-s TO from IP</span>
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||
<a name="l00078"></a>00078
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||
<a name="l00079"></a>00079 <span class="comment">// New information</span>
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||
<a name="l00080"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#a694ffa082013a8b6a4051d0fda6ff14">00080</a> <a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#a694ffa082013a8b6a4051d0fda6ff14">sides</a>;
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||
<a name="l00081"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">00081</a> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[2]; <span class="comment">// 1=arrival, -1departure, 0=neutral; == how_a//how_b</span>
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||
<a name="l00082"></a>00082
|
||
<a name="l00083"></a>00083
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||
<a name="l00084"></a>00084 <span class="comment">// About arrival[0] (== arrival of a2 w.r.t. b) for COLLINEAR cases</span>
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||
<a name="l00085"></a>00085 <span class="comment">// Arrival 1: a1--------->a2 (a arrives within b)</span>
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<a name="l00086"></a>00086 <span class="comment">// b1----->b2</span>
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<a name="l00087"></a>00087
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<a name="l00088"></a>00088 <span class="comment">// Arrival 1: (a in b)</span>
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<a name="l00089"></a>00089 <span class="comment">//</span>
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||
<a name="l00090"></a>00090
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||
<a name="l00091"></a>00091
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||
<a name="l00092"></a>00092 <span class="comment">// Arrival -1: a1--------->a2 (a does not arrive within b)</span>
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||
<a name="l00093"></a>00093 <span class="comment">// b1----->b2</span>
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||
<a name="l00094"></a>00094
|
||
<a name="l00095"></a>00095 <span class="comment">// Arrival -1: (b in a) a_1-------------a_2</span>
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||
<a name="l00096"></a>00096 <span class="comment">// b_1---b_2</span>
|
||
<a name="l00097"></a>00097
|
||
<a name="l00098"></a>00098 <span class="comment">// Arrival 0: a1------->a2 (a arrives at TO-border of b)</span>
|
||
<a name="l00099"></a>00099 <span class="comment">// b1--->b2</span>
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||
<a name="l00100"></a>00100
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<a name="l00101"></a>00101 };
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<a name="l00102"></a>00102
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<a name="l00103"></a>00103
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<a name="l00104"></a>00104 <span class="keyword">template</span> <<span class="keyword">typename</span> S1, <span class="keyword">typename</span> S2, <span class="keyword">typename</span> CalculationType = <span class="keywordtype">void</span>>
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<a name="l00105"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html">00105</a> <span class="keyword">struct </span><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html">segments_direction</a>
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||
<a name="l00106"></a>00106 {
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||
<a name="l00107"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">00107</a> <span class="keyword">typedef</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">direction_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a>;
|
||
<a name="l00108"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#ca835fd8903eb33544e91ae318dfa9e9">00108</a> <span class="keyword">typedef</span> S1 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#ca835fd8903eb33544e91ae318dfa9e9">segment_type1</a>;
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||
<a name="l00109"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#311b0b522fae8aab5b3b6d8863ee7a8c">00109</a> <span class="keyword">typedef</span> S2 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#311b0b522fae8aab5b3b6d8863ee7a8c">segment_type2</a>;
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||
<a name="l00110"></a>00110 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structboost_1_1geometry_1_1select__calculation__type.html" title="Meta-function selecting the &quot;calculation&quot; type.">select_calculation_type</a>
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||
<a name="l00111"></a>00111 <
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<a name="l00112"></a>00112 S1, S2, CalculationType
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||
<a name="l00113"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">00113</a> >::type <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a>;
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<a name="l00114"></a>00114
|
||
<a name="l00115"></a>00115 <span class="comment">// Get the same type, but at least a double</span>
|
||
<a name="l00116"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#c01605e19b89304469313f8eab16dc67">00116</a> <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structboost_1_1geometry_1_1select__most__precise.html" title="Meta-function to select, of two types, the most accurate type for calculations.">select_most_precise<coordinate_type, double>::type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#c01605e19b89304469313f8eab16dc67">rtype</a>;
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||
<a name="l00117"></a>00117
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<a name="l00118"></a>00118
|
||
<a name="l00119"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#3aaa4b3ed4ac10737c3fadc3c14e082b">00119</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#3aaa4b3ed4ac10737c3fadc3c14e082b">segments_intersect</a>(<a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> <span class="keyword">const</span>& sides,
|
||
<a name="l00120"></a>00120 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dx1, <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dy1,
|
||
<a name="l00121"></a>00121 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dx2, <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dy2,
|
||
<a name="l00122"></a>00122 S1 <span class="keyword">const</span>& s1, S2 <span class="keyword">const</span>& s2)
|
||
<a name="l00123"></a>00123 {
|
||
<a name="l00124"></a>00124 <span class="keywordtype">bool</span> <span class="keyword">const</span> ra0 = sides.<a class="code" href="classboost_1_1geometry_1_1side__info.html#53f54ea73f5570b40641ba38fb1b55f8">get</a><0,0>() == 0;
|
||
<a name="l00125"></a>00125 <span class="keywordtype">bool</span> <span class="keyword">const</span> ra1 = sides.<a class="code" href="classboost_1_1geometry_1_1side__info.html#53f54ea73f5570b40641ba38fb1b55f8">get</a><0,1>() == 0;
|
||
<a name="l00126"></a>00126 <span class="keywordtype">bool</span> <span class="keyword">const</span> rb0 = sides.<a class="code" href="classboost_1_1geometry_1_1side__info.html#53f54ea73f5570b40641ba38fb1b55f8">get</a><1,0>() == 0;
|
||
<a name="l00127"></a>00127 <span class="keywordtype">bool</span> <span class="keyword">const</span> rb1 = sides.<a class="code" href="classboost_1_1geometry_1_1side__info.html#53f54ea73f5570b40641ba38fb1b55f8">get</a><1,1>() == 0;
|
||
<a name="l00128"></a>00128
|
||
<a name="l00129"></a>00129 <span class="keywordflow">return</span>
|
||
<a name="l00130"></a>00130 <span class="comment">// opposite and same starting point (FROM)</span>
|
||
<a name="l00131"></a>00131 ra0 && rb0 ? calculate_side<1>(sides, dx1, dy1, s1, s2, <span class="charliteral">'f'</span>, -1, -1)
|
||
<a name="l00132"></a>00132
|
||
<a name="l00133"></a>00133 <span class="comment">// opposite and point to each other (TO)</span>
|
||
<a name="l00134"></a>00134 : ra1 && rb1 ? calculate_side<0>(sides, dx1, dy1, s1, s2, <span class="charliteral">'t'</span>, 1, 1)
|
||
<a name="l00135"></a>00135
|
||
<a name="l00136"></a>00136 <span class="comment">// not opposite, forming an angle, first a then b,</span>
|
||
<a name="l00137"></a>00137 <span class="comment">// directed either both left, or both right</span>
|
||
<a name="l00138"></a>00138 <span class="comment">// Check side of B2 from A. This is not calculated before</span>
|
||
<a name="l00139"></a>00139 : ra1 && rb0 ? angle<1>(sides, dx1, dy1, s1, s2, <span class="charliteral">'a'</span>, 1, -1)
|
||
<a name="l00140"></a>00140
|
||
<a name="l00141"></a>00141 <span class="comment">// not opposite, forming a angle, first b then a,</span>
|
||
<a name="l00142"></a>00142 <span class="comment">// directed either both left, or both right</span>
|
||
<a name="l00143"></a>00143 : ra0 && rb1 ? angle<0>(sides, dx1, dy1, s1, s2, <span class="charliteral">'a'</span>, -1, 1)
|
||
<a name="l00144"></a>00144
|
||
<a name="l00145"></a>00145 <span class="comment">// b starts from interior of a</span>
|
||
<a name="l00146"></a>00146 : rb0 ? starts_from_middle(sides, dx1, dy1, s1, s2, <span class="charliteral">'B'</span>, 0, -1)
|
||
<a name="l00147"></a>00147
|
||
<a name="l00148"></a>00148 <span class="comment">// a starts from interior of b (#39)</span>
|
||
<a name="l00149"></a>00149 : ra0 ? starts_from_middle(sides, dx1, dy1, s1, s2, <span class="charliteral">'A'</span>, -1, 0)
|
||
<a name="l00150"></a>00150
|
||
<a name="l00151"></a>00151 <span class="comment">// b ends at interior of a, calculate direction of A from IP</span>
|
||
<a name="l00152"></a>00152 : rb1 ? b_ends_at_middle(sides, dx2, dy2, s1, s2)
|
||
<a name="l00153"></a>00153
|
||
<a name="l00154"></a>00154 <span class="comment">// a ends at interior of b</span>
|
||
<a name="l00155"></a>00155 : ra1 ? a_ends_at_middle(sides, dx1, dy1, s1, s2)
|
||
<a name="l00156"></a>00156
|
||
<a name="l00157"></a>00157 <span class="comment">// normal intersection</span>
|
||
<a name="l00158"></a>00158 : calculate_side<1>(sides, dx1, dy1, s1, s2, <span class="charliteral">'i'</span>, -1, -1)
|
||
<a name="l00159"></a>00159 ;
|
||
<a name="l00160"></a>00160 }
|
||
<a name="l00161"></a>00161
|
||
<a name="l00162"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#9ec33d68c9105e3971284e048c67663f">00162</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#9ec33d68c9105e3971284e048c67663f">collinear_touch</a>(
|
||
<a name="l00163"></a>00163 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& ,
|
||
<a name="l00164"></a>00164 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& , <span class="keywordtype">int</span> arrival_a, <span class="keywordtype">int</span> arrival_b)
|
||
<a name="l00165"></a>00165 {
|
||
<a name="l00166"></a>00166 <span class="comment">// Though this is 'collinear', we handle it as To/From/Angle because it is the same.</span>
|
||
<a name="l00167"></a>00167 <span class="comment">// It only does NOT have a direction.</span>
|
||
<a name="l00168"></a>00168 <a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> sides;
|
||
<a name="l00169"></a>00169 <span class="comment">//int const arrive = how == 'T' ? 1 : -1;</span>
|
||
<a name="l00170"></a>00170 <span class="keywordtype">bool</span> opposite = arrival_a == arrival_b;
|
||
<a name="l00171"></a>00171 <span class="keywordflow">return</span>
|
||
<a name="l00172"></a>00172 ! opposite
|
||
<a name="l00173"></a>00173 ? <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, <span class="charliteral">'a'</span>, arrival_a, arrival_b)
|
||
<a name="l00174"></a>00174 : <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, arrival_a == 0 ? <span class="charliteral">'t'</span> : <span class="charliteral">'f'</span>, arrival_a, arrival_b, 0, 0, <span class="keyword">true</span>);
|
||
<a name="l00175"></a>00175 }
|
||
<a name="l00176"></a>00176
|
||
<a name="l00177"></a>00177 <span class="keyword">template</span> <<span class="keyword">typename</span> S>
|
||
<a name="l00178"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#3b9a4b1f4f80aa64a326e341768323d4">00178</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#3b9a4b1f4f80aa64a326e341768323d4">collinear_interior_boundary_intersect</a>(S <span class="keyword">const</span>& , <span class="keywordtype">bool</span>,
|
||
<a name="l00179"></a>00179 <span class="keywordtype">int</span> arrival_a, <span class="keywordtype">int</span> arrival_b, <span class="keywordtype">bool</span> opposite)
|
||
<a name="l00180"></a>00180 {
|
||
<a name="l00181"></a>00181 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> r(<span class="charliteral">'c'</span>, opposite);
|
||
<a name="l00182"></a>00182 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[0] = arrival_a;
|
||
<a name="l00183"></a>00183 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[1] = arrival_b;
|
||
<a name="l00184"></a>00184 <span class="keywordflow">return</span> r;
|
||
<a name="l00185"></a>00185 }
|
||
<a name="l00186"></a>00186
|
||
<a name="l00187"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#628f3d1b47eb443857a2506fa2fbc70c">00187</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#628f3d1b47eb443857a2506fa2fbc70c">collinear_a_in_b</a>(S1 <span class="keyword">const</span>& , <span class="keywordtype">bool</span> opposite)
|
||
<a name="l00188"></a>00188 {
|
||
<a name="l00189"></a>00189 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> r(<span class="charliteral">'c'</span>, opposite);
|
||
<a name="l00190"></a>00190 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[0] = 1;
|
||
<a name="l00191"></a>00191 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[1] = -1;
|
||
<a name="l00192"></a>00192 <span class="keywordflow">return</span> r;
|
||
<a name="l00193"></a>00193 }
|
||
<a name="l00194"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#60072e90036214bd36ffd0f8363ecedd">00194</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#60072e90036214bd36ffd0f8363ecedd">collinear_b_in_a</a>(S2 <span class="keyword">const</span>& , <span class="keywordtype">bool</span> opposite)
|
||
<a name="l00195"></a>00195 {
|
||
<a name="l00196"></a>00196 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> r(<span class="charliteral">'c'</span>, opposite);
|
||
<a name="l00197"></a>00197 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[0] = -1;
|
||
<a name="l00198"></a>00198 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[1] = 1;
|
||
<a name="l00199"></a>00199 <span class="keywordflow">return</span> r;
|
||
<a name="l00200"></a>00200 }
|
||
<a name="l00201"></a>00201
|
||
<a name="l00202"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#777672f1a809115319e9ab8452c69ba0">00202</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#777672f1a809115319e9ab8452c69ba0">collinear_overlaps</a>(
|
||
<a name="l00203"></a>00203 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& , <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& ,
|
||
<a name="l00204"></a>00204 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& , <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& ,
|
||
<a name="l00205"></a>00205 <span class="keywordtype">int</span> arrival_a, <span class="keywordtype">int</span> arrival_b, <span class="keywordtype">bool</span> opposite)
|
||
<a name="l00206"></a>00206 {
|
||
<a name="l00207"></a>00207 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> r(<span class="charliteral">'c'</span>, opposite);
|
||
<a name="l00208"></a>00208 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[0] = arrival_a;
|
||
<a name="l00209"></a>00209 r.<a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html#bd5f12ec5061166d6643b00608e7ae72">arrival</a>[1] = arrival_b;
|
||
<a name="l00210"></a>00210 <span class="keywordflow">return</span> r;
|
||
<a name="l00211"></a>00211 }
|
||
<a name="l00212"></a>00212
|
||
<a name="l00213"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#429124714a053485df81e0151f7598eb">00213</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#429124714a053485df81e0151f7598eb">segment_equal</a>(S1 <span class="keyword">const</span>& , <span class="keywordtype">bool</span> opposite)
|
||
<a name="l00214"></a>00214 {
|
||
<a name="l00215"></a>00215 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(<span class="charliteral">'e'</span>, opposite);
|
||
<a name="l00216"></a>00216 }
|
||
<a name="l00217"></a>00217
|
||
<a name="l00218"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#8e0deb580ead867cc60b0641e9db01aa">00218</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#8e0deb580ead867cc60b0641e9db01aa">degenerate</a>(S1 <span class="keyword">const</span>& , <span class="keywordtype">bool</span>)
|
||
<a name="l00219"></a>00219 {
|
||
<a name="l00220"></a>00220 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(<span class="charliteral">'0'</span>, <span class="keyword">false</span>);
|
||
<a name="l00221"></a>00221 }
|
||
<a name="l00222"></a>00222
|
||
<a name="l00223"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6443ce138e89ae858c37cc77777c3a7f">00223</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6443ce138e89ae858c37cc77777c3a7f">disjoint</a>()
|
||
<a name="l00224"></a>00224 {
|
||
<a name="l00225"></a>00225 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(<span class="charliteral">'d'</span>, <span class="keyword">false</span>);
|
||
<a name="l00226"></a>00226 }
|
||
<a name="l00227"></a>00227
|
||
<a name="l00228"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#f1e66ed8055c966109e510aabcaed6ea">00228</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#f1e66ed8055c966109e510aabcaed6ea">collinear_disjoint</a>()
|
||
<a name="l00229"></a>00229 {
|
||
<a name="l00230"></a>00230 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(<span class="charliteral">'d'</span>, <span class="keyword">false</span>);
|
||
<a name="l00231"></a>00231 }
|
||
<a name="l00232"></a>00232
|
||
<a name="l00233"></a>00233
|
||
<a name="l00234"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#7ef12130af52fc42df7be9fc63bbdd3a">00234</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#7ef12130af52fc42df7be9fc63bbdd3a">parallel</a>()
|
||
<a name="l00235"></a>00235 {
|
||
<a name="l00236"></a>00236 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(<span class="charliteral">'p'</span>, <span class="keyword">false</span>);
|
||
<a name="l00237"></a>00237 }
|
||
<a name="l00238"></a>00238
|
||
<a name="l00239"></a><a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#fa239f8f414658d0f0562c92ae607b0e">00239</a> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1direction__type.html">return_type</a> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#fa239f8f414658d0f0562c92ae607b0e">error</a>(std::string <span class="keyword">const</span>& msg)
|
||
<a name="l00240"></a>00240 {
|
||
<a name="l00241"></a>00241 <span class="comment">// msg</span>
|
||
<a name="l00242"></a>00242 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(<span class="charliteral">'d'</span>, <span class="keyword">false</span>);
|
||
<a name="l00243"></a>00243 }
|
||
<a name="l00244"></a>00244
|
||
<a name="l00245"></a>00245 <span class="keyword">private</span> :
|
||
<a name="l00246"></a>00246
|
||
<a name="l00247"></a>00247
|
||
<a name="l00248"></a>00248 <span class="keyword">template</span> <std::<span class="keywordtype">size_t</span> I>
|
||
<a name="l00249"></a>00249 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a> calculate_side(<a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> <span class="keyword">const</span>& sides,
|
||
<a name="l00250"></a>00250 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dx1, <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dy1,
|
||
<a name="l00251"></a>00251 S1 <span class="keyword">const</span>& s1, S2 <span class="keyword">const</span>& s2,
|
||
<a name="l00252"></a>00252 <span class="keywordtype">char</span> how, <span class="keywordtype">int</span> how_a, <span class="keywordtype">int</span> how_b)
|
||
<a name="l00253"></a>00253 {
|
||
<a name="l00254"></a>00254 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> dpx = get<I, 0>(s2) - get<0, 0>(s1);
|
||
<a name="l00255"></a>00255 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> dpy = get<I, 1>(s2) - get<0, 1>(s1);
|
||
<a name="l00256"></a>00256
|
||
<a name="l00257"></a>00257 <span class="comment">// This is a "side calculation" as in the strategies, but here two terms are precalculated</span>
|
||
<a name="l00258"></a>00258 <span class="comment">// We might merge this with side, offering a pre-calculated term</span>
|
||
<a name="l00259"></a>00259 <span class="comment">// Waiting for implementing spherical...</span>
|
||
<a name="l00260"></a>00260
|
||
<a name="l00261"></a>00261 <span class="keywordflow">return</span> dx1 * dpy - dy1 * dpx > 0
|
||
<a name="l00262"></a>00262 ? <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, how, how_a, how_b, -1, 1)
|
||
<a name="l00263"></a>00263 : return_type(sides, how, how_a, how_b, 1, -1);
|
||
<a name="l00264"></a>00264 }
|
||
<a name="l00265"></a>00265
|
||
<a name="l00266"></a>00266 <span class="keyword">template</span> <std::<span class="keywordtype">size_t</span> I>
|
||
<a name="l00267"></a>00267 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a> angle(<a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> <span class="keyword">const</span>& sides,
|
||
<a name="l00268"></a>00268 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dx1, <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dy1,
|
||
<a name="l00269"></a>00269 S1 <span class="keyword">const</span>& s1, S2 <span class="keyword">const</span>& s2,
|
||
<a name="l00270"></a>00270 <span class="keywordtype">char</span> how, <span class="keywordtype">int</span> how_a, <span class="keywordtype">int</span> how_b)
|
||
<a name="l00271"></a>00271 {
|
||
<a name="l00272"></a>00272 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> dpx = get<I, 0>(s2) - get<0, 0>(s1);
|
||
<a name="l00273"></a>00273 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> dpy = get<I, 1>(s2) - get<0, 1>(s1);
|
||
<a name="l00274"></a>00274
|
||
<a name="l00275"></a>00275 <span class="keywordflow">return</span> dx1 * dpy - dy1 * dpx > 0
|
||
<a name="l00276"></a>00276 ? <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, how, how_a, how_b, 1, 1)
|
||
<a name="l00277"></a>00277 : return_type(sides, how, how_a, how_b, -1, -1);
|
||
<a name="l00278"></a>00278 }
|
||
<a name="l00279"></a>00279
|
||
<a name="l00280"></a>00280
|
||
<a name="l00281"></a>00281 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a> starts_from_middle(<a class="code" href="classboost_1_1geometry_1_1side__info.html" title="Class side_info: small class wrapping for sides (-1,0,1).">side_info</a> <span class="keyword">const</span>& sides,
|
||
<a name="l00282"></a>00282 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dx1, <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> <span class="keyword">const</span>& dy1,
|
||
<a name="l00283"></a>00283 S1 <span class="keyword">const</span>& s1, S2 <span class="keyword">const</span>& s2,
|
||
<a name="l00284"></a>00284 <span class="keywordtype">char</span> which,
|
||
<a name="l00285"></a>00285 <span class="keywordtype">int</span> how_a, <span class="keywordtype">int</span> how_b)
|
||
<a name="l00286"></a>00286 {
|
||
<a name="l00287"></a>00287 <span class="comment">// Calculate ARROW of b segment w.r.t. s1</span>
|
||
<a name="l00288"></a>00288 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> dpx = get<1, 0>(s2) - get<0, 0>(s1);
|
||
<a name="l00289"></a>00289 <a class="code" href="structboost_1_1geometry_1_1coordinate__type.html" title="Meta-function which defines coordinate type (int, float, double, etc) of any geometry...">coordinate_type</a> dpy = get<1, 1>(s2) - get<0, 1>(s1);
|
||
<a name="l00290"></a>00290
|
||
<a name="l00291"></a>00291 <span class="keywordtype">int</span> dir = dx1 * dpy - dy1 * dpx > 0 ? 1 : -1;
|
||
<a name="l00292"></a>00292
|
||
<a name="l00293"></a>00293 <span class="comment">// From other perspective, then reverse</span>
|
||
<a name="l00294"></a>00294 <span class="keywordtype">bool</span> <span class="keyword">const</span> is_a = which == <span class="charliteral">'A'</span>;
|
||
<a name="l00295"></a>00295 <span class="keywordflow">if</span> (is_a)
|
||
<a name="l00296"></a>00296 {
|
||
<a name="l00297"></a>00297 dir = -dir;
|
||
<a name="l00298"></a>00298 }
|
||
<a name="l00299"></a>00299
|
||
<a name="l00300"></a>00300 <span class="keywordflow">return</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, <span class="charliteral">'s'</span>,
|
||
<a name="l00301"></a>00301 how_a,
|
||
<a name="l00302"></a>00302 how_b,
|
||
<a name="l00303"></a>00303 is_a ? dir : -dir,
|
||
<a name="l00304"></a>00304 ! is_a ? dir : -dir);
|
||
<a name="l00305"></a>00305 }
|
||
<a name="l00306"></a>00306
|
||
<a name="l00307"></a>00307
|
||
<a name="l00308"></a>00308
|
||
<a name="l00309"></a>00309 <span class="comment">// To be harmonized</span>
|
||
<a name="l00310"></a>00310 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a> a_ends_at_middle(side_info <span class="keyword">const</span>& sides,
|
||
<a name="l00311"></a>00311 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> <span class="keyword">const</span>& dx, <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> <span class="keyword">const</span>& dy,
|
||
<a name="l00312"></a>00312 S1 <span class="keyword">const</span>& s1, S2 <span class="keyword">const</span>& s2)
|
||
<a name="l00313"></a>00313 {
|
||
<a name="l00314"></a>00314 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> dpx = get<1, 0>(s2) - get<0, 0>(s1);
|
||
<a name="l00315"></a>00315 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> dpy = get<1, 1>(s2) - get<0, 1>(s1);
|
||
<a name="l00316"></a>00316
|
||
<a name="l00317"></a>00317 <span class="comment">// Ending at the middle, one ARRIVES, the other one is NEUTRAL</span>
|
||
<a name="l00318"></a>00318 <span class="comment">// (because it both "arrives" and "departs" there</span>
|
||
<a name="l00319"></a>00319 <span class="keywordflow">return</span> dx * dpy - dy * dpx > 0
|
||
<a name="l00320"></a>00320 ? <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, <span class="charliteral">'m'</span>, 1, 0, 1, 1)
|
||
<a name="l00321"></a>00321 : return_type(sides, <span class="stringliteral">'m'</span>, 1, 0, -1, -1);
|
||
<a name="l00322"></a>00322 }
|
||
<a name="l00323"></a>00323
|
||
<a name="l00324"></a>00324
|
||
<a name="l00325"></a>00325 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a> b_ends_at_middle(side_info <span class="keyword">const</span>& sides,
|
||
<a name="l00326"></a>00326 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> <span class="keyword">const</span>& dx, <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> <span class="keyword">const</span>& dy,
|
||
<a name="l00327"></a>00327 S1 <span class="keyword">const</span>& s1, S2 <span class="keyword">const</span>& s2)
|
||
<a name="l00328"></a>00328 {
|
||
<a name="l00329"></a>00329 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> dpx = get<1, 0>(s1) - get<0, 0>(s2);
|
||
<a name="l00330"></a>00330 <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#6874c4dd0b0d9eb5865b294db69b4ad8">coordinate_type</a> dpy = get<1, 1>(s1) - get<0, 1>(s2);
|
||
<a name="l00331"></a>00331
|
||
<a name="l00332"></a>00332 <span class="keywordflow">return</span> dx * dpy - dy * dpx > 0
|
||
<a name="l00333"></a>00333 ? <a class="code" href="structboost_1_1geometry_1_1policies_1_1relate_1_1segments__direction.html#98d379a19fea9fa416dc48f32ee9ea8b">return_type</a>(sides, <span class="charliteral">'m'</span>, 0, 1, 1, 1)
|
||
<a name="l00334"></a>00334 : return_type(sides, <span class="stringliteral">'m'</span>, 0, 1, -1, -1);
|
||
<a name="l00335"></a>00335 }
|
||
<a name="l00336"></a>00336
|
||
<a name="l00337"></a>00337 };
|
||
<a name="l00338"></a>00338
|
||
<a name="l00339"></a>00339 }} <span class="comment">// namespace policies::relate</span>
|
||
<a name="l00340"></a>00340
|
||
<a name="l00341"></a>00341 }} <span class="comment">// namespace boost::geometry</span>
|
||
<a name="l00342"></a>00342
|
||
<a name="l00343"></a>00343 <span class="preprocessor">#endif // BOOST_GEOMETRY_GEOMETRY_POLICIES_RELATE_DIRECTION_HPP</span>
|
||
</pre></div></div>
|
||
<hr size="1">
|
||
<table width="100%">
|
||
<tbody>
|
||
<tr>
|
||
<td align="left"><small>
|
||
<p>December 1, 2009</p>
|
||
</small></td>
|
||
<td align="right">
|
||
<small>Copyright <20> 1995-2009 Barend Gehrels, Geodan, Amsterdam<br>
|
||
Copyright <20> 2008-2009 Bruno Lalande, Paris<br>
|
||
Copyright <20> 2009 Mateusz Loskot, Cadcorp, London<br>
|
||
</small>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
|
||
<address style="text-align: right;"><small>
|
||
Documentation is generated by <a href="http://www.doxygen.org/index.html">Doxygen</a>
|
||
</small></address>
|
||
</body>
|
||
</html>
|