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<a href="trim__vector_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#ifndef SRC_ALGO_TRIM_VECTOR_HPP_</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#define SRC_ALGO_TRIM_VECTOR_HPP_</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160; </div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &quot;../geometry.hpp&quot;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &quot;../translation_vector.hpp&quot;</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160; </div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacelibnfporb.html">libnfporb</a> {</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">//TODO deduplicate code</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"><a class="line" href="namespacelibnfporb.html#a2fd421a83d9da2c621d947f3ceba6664">   16</a></span>&#160;<span class="comment"></span><a class="code" href="structlibnfporb_1_1TranslationVector.html">TranslationVector</a> <a class="code" href="namespacelibnfporb.html#a2fd421a83d9da2c621d947f3ceba6664">trim_vector</a>(<span class="keyword">const</span> polygon_t::ring_type&amp; rA, <span class="keyword">const</span> polygon_t::ring_type&amp; rB, <span class="keyword">const</span> <a class="code" href="structlibnfporb_1_1TranslationVector.html">TranslationVector</a>&amp; tv) {</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;    <a class="code" href="classlibnfporb_1_1LongDouble.html">coord_t</a> shortest = bg::length(tv.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a7b6e47137291b41d9f2458142edda3e0">edge_</a>);</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;    <a class="code" href="structlibnfporb_1_1TranslationVector.html">TranslationVector</a> trimmed = tv;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;    <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; ptA : rA) {</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;        <a class="code" href="classlibnfporb_1_1point__t.html">point_t</a> translated;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;        <span class="comment">//for polygon A we invert the translation</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;        trans::translate_transformer&lt;coord_t, 2, 2&gt; translate(-tv.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">vector_</a>.<a class="code" href="classlibnfporb_1_1point__t.html#aba1e2421386afb0f2cf10dd13faab812">x_</a>, -tv.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">vector_</a>.<a class="code" href="classlibnfporb_1_1point__t.html#ae6f0c323fd4ee211e141aef3aed44f90">y_</a>);</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;        boost::geometry::transform(ptA, translated, translate);</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;        <a class="code" href="namespacelibnfporb.html#a604670e70eaa3b16302079bcd9a767b6">linestring_t</a> projection;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;        <a class="code" href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">segment_t</a> segproj(ptA, translated);</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;        projection.push_back(ptA);</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;        projection.push_back(translated);</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;        std::vector&lt;point_t&gt; intersections;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;        bg::intersection(rB, projection, intersections);</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;        <span class="keywordflow">if</span> (bg::touches(projection, rB) &amp;&amp; intersections.size() &lt; 2) {</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;            <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;        }</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;        <span class="comment">//find shortest intersection</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        <a class="code" href="classlibnfporb_1_1LongDouble.html">coord_t</a> len;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;        <a class="code" href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">segment_t</a> segi;</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;        <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; pti : intersections) {</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;            segi = <a class="code" href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">segment_t</a>(ptA, pti);</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;            len = bg::length(segi);</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;            <span class="keywordflow">if</span> (<a class="code" href="namespacelibnfporb.html#a4bf253739214a0da53cfc62291c36a5f">smaller</a>(NFP_EPSILON, len) &amp;&amp; <a class="code" href="namespacelibnfporb.html#a4bf253739214a0da53cfc62291c36a5f">smaller</a>(len, shortest)) {</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;                trimmed.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">vector_</a> = ptA - pti;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;                trimmed.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a7b6e47137291b41d9f2458142edda3e0">edge_</a> = segi;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;                shortest = len;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;            }</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        }</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    }</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160; </div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; ptB : rB) {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        <a class="code" href="classlibnfporb_1_1point__t.html">point_t</a> translated;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160; </div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;        trans::translate_transformer&lt;coord_t, 2, 2&gt; translate(tv.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">vector_</a>.<a class="code" href="classlibnfporb_1_1point__t.html#aba1e2421386afb0f2cf10dd13faab812">x_</a>, tv.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">vector_</a>.<a class="code" href="classlibnfporb_1_1point__t.html#ae6f0c323fd4ee211e141aef3aed44f90">y_</a>);</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;        boost::geometry::transform(ptB, translated, translate);</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        <a class="code" href="namespacelibnfporb.html#a604670e70eaa3b16302079bcd9a767b6">linestring_t</a> projection;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        <a class="code" href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">segment_t</a> segproj(ptB, translated);</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        projection.push_back(ptB);</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        projection.push_back(translated);</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        std::vector&lt;point_t&gt; intersections;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;        bg::intersection(rA, projection, intersections);</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        <span class="keywordflow">if</span> (bg::touches(projection, rA) &amp;&amp; intersections.size() &lt; 2) {</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;            <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="comment">//find shortest intersection</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        <a class="code" href="classlibnfporb_1_1LongDouble.html">coord_t</a> len;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        <a class="code" href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">segment_t</a> segi;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; pti : intersections) {</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160; </div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;            segi = <a class="code" href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">segment_t</a>(ptB, pti);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;            len = bg::length(segi);</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;            <span class="keywordflow">if</span> (<a class="code" href="namespacelibnfporb.html#a4bf253739214a0da53cfc62291c36a5f">smaller</a>(NFP_EPSILON, len) &amp;&amp; <a class="code" href="namespacelibnfporb.html#a4bf253739214a0da53cfc62291c36a5f">smaller</a>(len, shortest)) {</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                trimmed.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">vector_</a> = pti - ptB;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                trimmed.<a class="code" href="structlibnfporb_1_1TranslationVector.html#a7b6e47137291b41d9f2458142edda3e0">edge_</a> = segi;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;                shortest = len;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;            }</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        }</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    }</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <span class="keywordflow">return</span> trimmed;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;}</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;}</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* SRC_ALGO_TRIM_VECTOR_HPP_ */</span><span class="preprocessor"></span></div>
<div class="ttc" id="aclasslibnfporb_1_1LongDouble_html"><div class="ttname"><a href="classlibnfporb_1_1LongDouble.html">libnfporb::LongDouble</a></div><div class="ttdef"><b>Definition:</b> geometry.hpp:39</div></div>
<div class="ttc" id="aclasslibnfporb_1_1point__t_html"><div class="ttname"><a href="classlibnfporb_1_1point__t.html">libnfporb::point_t</a></div><div class="ttdef"><b>Definition:</b> geometry.hpp:292</div></div>
<div class="ttc" id="aclasslibnfporb_1_1point__t_html_aba1e2421386afb0f2cf10dd13faab812"><div class="ttname"><a href="classlibnfporb_1_1point__t.html#aba1e2421386afb0f2cf10dd13faab812">libnfporb::point_t::x_</a></div><div class="ttdeci">coord_t x_</div><div class="ttdef"><b>Definition:</b> geometry.hpp:301</div></div>
<div class="ttc" id="aclasslibnfporb_1_1point__t_html_ae6f0c323fd4ee211e141aef3aed44f90"><div class="ttname"><a href="classlibnfporb_1_1point__t.html#ae6f0c323fd4ee211e141aef3aed44f90">libnfporb::point_t::y_</a></div><div class="ttdeci">coord_t y_</div><div class="ttdef"><b>Definition:</b> geometry.hpp:302</div></div>
<div class="ttc" id="anamespacelibnfporb_html"><div class="ttname"><a href="namespacelibnfporb.html">libnfporb</a></div><div class="ttdef"><b>Definition:</b> geometry.hpp:26</div></div>
<div class="ttc" id="anamespacelibnfporb_html_a2fd421a83d9da2c621d947f3ceba6664"><div class="ttname"><a href="namespacelibnfporb.html#a2fd421a83d9da2c621d947f3ceba6664">libnfporb::trim_vector</a></div><div class="ttdeci">TranslationVector trim_vector(const polygon_t::ring_type &amp;rA, const polygon_t::ring_type &amp;rB, const TranslationVector &amp;tv)</div><div class="ttdoc">Trim a given translation vector so that it doesn't intersect with either rA or rB.</div><div class="ttdef"><b>Definition:</b> trim_vector.hpp:16</div></div>
<div class="ttc" id="anamespacelibnfporb_html_a4bf253739214a0da53cfc62291c36a5f"><div class="ttname"><a href="namespacelibnfporb.html#a4bf253739214a0da53cfc62291c36a5f">libnfporb::smaller</a></div><div class="ttdeci">bool smaller(const LongDouble &amp;lhs, const LongDouble &amp;rhs)</div><div class="ttdef"><b>Definition:</b> geometry.hpp:455</div></div>
<div class="ttc" id="anamespacelibnfporb_html_a56b264a84ae3c5f7e5c984e17ee89fbc"><div class="ttname"><a href="namespacelibnfporb.html#a56b264a84ae3c5f7e5c984e17ee89fbc">libnfporb::segment_t</a></div><div class="ttdeci">bg::model::segment&lt; point_t &gt; segment_t</div><div class="ttdef"><b>Definition:</b> geometry.hpp:355</div></div>
<div class="ttc" id="anamespacelibnfporb_html_a604670e70eaa3b16302079bcd9a767b6"><div class="ttname"><a href="namespacelibnfporb.html#a604670e70eaa3b16302079bcd9a767b6">libnfporb::linestring_t</a></div><div class="ttdeci">bg::model::linestring&lt; point_t &gt; linestring_t</div><div class="ttdef"><b>Definition:</b> geometry.hpp:495</div></div>
<div class="ttc" id="astructlibnfporb_1_1TranslationVector_html"><div class="ttname"><a href="structlibnfporb_1_1TranslationVector.html">libnfporb::TranslationVector</a></div><div class="ttdef"><b>Definition:</b> translation_vector.hpp:10</div></div>
<div class="ttc" id="astructlibnfporb_1_1TranslationVector_html_a4c67c4cee95a6c55f7092f4e803ff581"><div class="ttname"><a href="structlibnfporb_1_1TranslationVector.html#a4c67c4cee95a6c55f7092f4e803ff581">libnfporb::TranslationVector::vector_</a></div><div class="ttdeci">point_t vector_</div><div class="ttdef"><b>Definition:</b> translation_vector.hpp:11</div></div>
<div class="ttc" id="astructlibnfporb_1_1TranslationVector_html_a7b6e47137291b41d9f2458142edda3e0"><div class="ttname"><a href="structlibnfporb_1_1TranslationVector.html#a7b6e47137291b41d9f2458142edda3e0">libnfporb::TranslationVector::edge_</a></div><div class="ttdeci">segment_t edge_</div><div class="ttdef"><b>Definition:</b> translation_vector.hpp:12</div></div>
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