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<title>Algorithms_in_C++: SegmentIntersection Struct Reference</title>
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<div id="projectname">Algorithms_in_C++<span id="projectnumber"> 1.0.0</span>
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<div id="projectbrief">Set of algorithms implemented in C++.</div>
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@@ -149,12 +149,12 @@ Public Member Functions</h2></td></tr>
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</div><div class="memdoc">
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<p >We will find direction of line here respect to @first_point. Here @second_point and @third_point is first and second points of the line respectively. we want a method to determine which way a given angle these three points turns. If returned number is negative, then the angle is counter-clockwise. That means the line is going to right to left. We will fount angle as clockwise if the method returns positive number. </p>
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<div class="fragment"><div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> {</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">return</span> ((third_point.x - first_point.x) *</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> (second_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> - first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>)) -</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> ((second_point.x - first_point.x) *</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> (third_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> - first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>));</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> }</div>
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<div class="fragment"><div class="line"><span class="lineno"> 64</span> {</div>
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<div class="line"><span class="lineno"> 65</span> <span class="keywordflow">return</span> ((third_point.x - first_point.x) *</div>
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<div class="line"><span class="lineno"> 66</span> (second_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> - first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>)) -</div>
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<div class="line"><span class="lineno"> 67</span> ((second_point.x - first_point.x) *</div>
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<div class="line"><span class="lineno"> 68</span> (third_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> - first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>));</div>
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<div class="line"><span class="lineno"> 69</span> }</div>
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<div class="ttc" id="astruct_point_html_a2e1b5fb2b2a83571f5c0bc0f66a73cf7"><div class="ttname"><a href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">Point::y</a></div><div class="ttdeci">int y</div><div class="ttdoc">Point respect to x coordinate.</div><div class="ttdef"><b>Definition:</b> line_segment_intersection.cpp:14</div></div>
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</div><!-- fragment -->
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</div>
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@@ -204,35 +204,35 @@ Public Member Functions</h2></td></tr>
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</tr>
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</div><div class="memdoc">
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<div class="fragment"><div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> {</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keywordtype">int</span> direction1 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(third_point, forth_point, first_point);</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordtype">int</span> direction2 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(third_point, forth_point, second_point);</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordtype">int</span> direction3 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(first_point, second_point, third_point);</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keywordtype">int</span> direction4 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(first_point, second_point, forth_point);</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="keywordflow">if</span> ((direction1 < 0 || direction2 > 0) &&</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> (direction3 < 0 || direction4 > 0))</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction1 == 0 &&</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(third_point, forth_point, first_point))</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> </div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction2 == 0 &&</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(third_point, forth_point, second_point))</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction3 == 0 &&</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(first_point, second_point, third_point))</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction3 == 0 &&</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(first_point, second_point, forth_point))</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> </div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> }</div>
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<div class="fragment"><div class="line"><span class="lineno"> 24</span> {</div>
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<div class="line"><span class="lineno"> 25</span> <span class="keywordtype">int</span> direction1 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(third_point, forth_point, first_point);</div>
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<div class="line"><span class="lineno"> 26</span> <span class="keywordtype">int</span> direction2 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(third_point, forth_point, second_point);</div>
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<div class="line"><span class="lineno"> 27</span> <span class="keywordtype">int</span> direction3 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(first_point, second_point, third_point);</div>
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||||
<div class="line"><span class="lineno"> 28</span> <span class="keywordtype">int</span> direction4 = <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">direction</a>(first_point, second_point, forth_point);</div>
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<div class="line"><span class="lineno"> 29</span> </div>
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<div class="line"><span class="lineno"> 30</span> <span class="keywordflow">if</span> ((direction1 < 0 || direction2 > 0) &&</div>
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<div class="line"><span class="lineno"> 31</span> (direction3 < 0 || direction4 > 0))</div>
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<div class="line"><span class="lineno"> 32</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 33</span> </div>
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<div class="line"><span class="lineno"> 34</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction1 == 0 &&</div>
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<div class="line"><span class="lineno"> 35</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(third_point, forth_point, first_point))</div>
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<div class="line"><span class="lineno"> 36</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 37</span> </div>
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<div class="line"><span class="lineno"> 38</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction2 == 0 &&</div>
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<div class="line"><span class="lineno"> 39</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(third_point, forth_point, second_point))</div>
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<div class="line"><span class="lineno"> 40</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 41</span> </div>
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<div class="line"><span class="lineno"> 42</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction3 == 0 &&</div>
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<div class="line"><span class="lineno"> 43</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(first_point, second_point, third_point))</div>
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<div class="line"><span class="lineno"> 44</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 45</span> </div>
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<div class="line"><span class="lineno"> 46</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (direction3 == 0 &&</div>
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<div class="line"><span class="lineno"> 47</span> <a class="code hl_function" href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">on_segment</a>(first_point, second_point, forth_point))</div>
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<div class="line"><span class="lineno"> 48</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 49</span> </div>
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<div class="line"><span class="lineno"> 50</span> <span class="keywordflow">else</span></div>
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<div class="line"><span class="lineno"> 51</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><span class="lineno"> 52</span> }</div>
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<div class="ttc" id="astruct_segment_intersection_html_a008941b2272866c64cdaf959afa939bf"><div class="ttname"><a href="../../d4/db4/struct_segment_intersection.html#a008941b2272866c64cdaf959afa939bf">SegmentIntersection::on_segment</a></div><div class="ttdeci">bool on_segment(Point first_point, Point second_point, Point third_point)</div><div class="ttdef"><b>Definition:</b> line_segment_intersection.cpp:75</div></div>
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<div class="ttc" id="astruct_segment_intersection_html_a3beb2ac1b35d67354f1dbaf9a971e655"><div class="ttname"><a href="../../d4/db4/struct_segment_intersection.html#a3beb2ac1b35d67354f1dbaf9a971e655">SegmentIntersection::direction</a></div><div class="ttdeci">int direction(Point first_point, Point second_point, Point third_point)</div><div class="ttdef"><b>Definition:</b> line_segment_intersection.cpp:63</div></div>
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</div><!-- fragment -->
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@@ -278,16 +278,16 @@ Public Member Functions</h2></td></tr>
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</div><div class="memdoc">
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<p >This method determines whether a point known to be colinear with a segment lies on that segment. </p>
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<div class="fragment"><div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> {</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">if</span> (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(first_point.x, second_point.x) <= third_point.x &&</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> third_point.x <= <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a>(first_point.x, second_point.x) &&</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>, second_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>) <= third_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> &&</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> third_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> <= <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a>(first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>, second_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>))</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div>
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<div class="fragment"><div class="line"><span class="lineno"> 76</span> {</div>
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<div class="line"><span class="lineno"> 77</span> <span class="keywordflow">if</span> (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(first_point.x, second_point.x) <= third_point.x &&</div>
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<div class="line"><span class="lineno"> 78</span> third_point.x <= <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a>(first_point.x, second_point.x) &&</div>
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<div class="line"><span class="lineno"> 79</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>, second_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>) <= third_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> &&</div>
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<div class="line"><span class="lineno"> 80</span> third_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a> <= <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a>(first_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>, second_point.<a class="code hl_variable" href="../../d8/dc8/struct_point.html#a2e1b5fb2b2a83571f5c0bc0f66a73cf7">y</a>))</div>
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<div class="line"><span class="lineno"> 81</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
||||
<div class="line"><span class="lineno"> 82</span> </div>
|
||||
<div class="line"><span class="lineno"> 83</span> <span class="keywordflow">else</span></div>
|
||||
<div class="line"><span class="lineno"> 84</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
||||
<div class="line"><span class="lineno"> 85</span> }</div>
|
||||
<div class="ttc" id="amax_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a></div><div class="ttdeci">T max(T... args)</div></div>
|
||||
<div class="ttc" id="amin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a></div><div class="ttdeci">T min(T... args)</div></div>
|
||||
</div><!-- fragment --><div class="dynheader">
|
||||
@@ -308,7 +308,7 @@ Here is the call graph for this function:</div>
|
||||
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
|
||||
<ul>
|
||||
<li class="navelem"><a class="el" href="../../d4/db4/struct_segment_intersection.html">SegmentIntersection</a></li>
|
||||
<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="../../doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.2 </li>
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||||
<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="../../doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.3 </li>
|
||||
</ul>
|
||||
</div>
|
||||
</body>
|
||||
|
||||
Reference in New Issue
Block a user