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<div class="title">QuadPrefixTree.cs</div> </div>
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<a href="_quad_prefix_tree_8cs.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="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * this work for additional information regarding copyright ownership.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * (the &quot;License&quot;); you may not use this file except in compliance with</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="keyword">using</span> System.Collections.Generic;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="keyword">using</span> System.Diagnostics;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="keyword">using</span> System.Text;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keyword">using</span> Spatial4n.Core.Context;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">using</span> Spatial4n.Core.Shapes;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Spatial.Prefix.Tree</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;{</div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html"> 31</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a> : <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_spatial_prefix_tree.html" title="A spatial Prefix Tree, or Trie, which decomposes shapes into prefixed strings at variable lengths cor...">SpatialPrefixTree</a></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; {</div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_factory.html"> 36</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_factory.html" title="Factory for creating QuadPrefixTree instances with useful defaults ">Factory</a> : <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_spatial_prefix_tree_factory.html" title="Abstract Factory for creating SpatialPrefixTree instances with useful defaults and passed on configur...">SpatialPrefixTreeFactory</a></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; {</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_factory.html#a4fb0a4e0265cfb7b044eb0b60993775f"> 38</a></span>&#160; <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">int</span> GetLevelForDistance(<span class="keywordtype">double</span> degrees)</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; var grid = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>(ctx, MAX_LEVELS_POSSIBLE);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">return</span> grid.GetLevelForDistance(degrees);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; }</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_factory.html#ade1c0f17b5d87e74e92bf8ee9aeda6f8"> 44</a></span>&#160; <span class="keyword">protected</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_spatial_prefix_tree.html" title="A spatial Prefix Tree, or Trie, which decomposes shapes into prefixed strings at variable lengths cor...">SpatialPrefixTree</a> NewSPT()</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; <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>(ctx, maxLevels != null ? maxLevels.Value : MAX_LEVELS_POSSIBLE);</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; }</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#ae927910ddb142adad37b15097aa9ea9c"> 50</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> MAX_LEVELS_POSSIBLE = 50;<span class="comment">//not really sure how big this should be</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a816fb91c7bcefb5707c1d06adf11f367"> 52</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> DEFAULT_MAX_LEVELS = 12;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> xmin;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> xmax;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> ymin;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> ymax;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> xmid;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> ymid;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> gridW;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keyword">private</span> <span class="keywordtype">double</span> gridH;</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="keywordtype">double</span>[] levelW;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordtype">double</span>[] levelH;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordtype">int</span>[] levelS; <span class="comment">// side</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordtype">int</span>[] levelN; <span class="comment">// number</span></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"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#adbb126033537e666141faf618b33f5ea"> 68</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>(SpatialContext ctx, Rectangle bounds, <span class="keywordtype">int</span> maxLevels)</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; : base(ctx, maxLevels)</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; Init(ctx, bounds, maxLevels);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a0cbdf1969b3d20716bca05b0ffd64fe3"> 74</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>(SpatialContext ctx)</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; : base(ctx, DEFAULT_MAX_LEVELS)</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; Init(ctx, ctx.GetWorldBounds(), DEFAULT_MAX_LEVELS);</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"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a3a6f507c82d2b05a28fcf35075bca1eb"> 80</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>(SpatialContext ctx, <span class="keywordtype">int</span> maxLevels)</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; : base(ctx, maxLevels)</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; {</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; Init(ctx, ctx.GetWorldBounds(), maxLevels);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; }</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a83b545d32b26c28d2ded7f39449c95c9"> 86</a></span>&#160; <span class="keyword">protected</span> <span class="keywordtype">void</span> Init(SpatialContext ctx, Rectangle bounds, <span class="keywordtype">int</span> maxLevels)</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; {</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; this.xmin = bounds.GetMinX();</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; this.xmax = bounds.GetMaxX();</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; this.ymin = bounds.GetMinY();</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; this.ymax = bounds.GetMaxY();</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; levelW = <span class="keyword">new</span> <span class="keywordtype">double</span>[maxLevels];</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; levelH = <span class="keyword">new</span> <span class="keywordtype">double</span>[maxLevels];</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; levelS = <span class="keyword">new</span> <span class="keywordtype">int</span>[maxLevels];</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; levelN = <span class="keyword">new</span> <span class="keywordtype">int</span>[maxLevels];</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; gridW = xmax - xmin;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; gridH = ymax - ymin;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; xmid = xmin + gridW / 2.0;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; ymid = ymin + gridH / 2.0;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; levelW[0] = gridW / 2.0;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; levelH[0] = gridH / 2.0;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; levelS[0] = 2;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; levelN[0] = 4;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; levelW.Length; i++)</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; {</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; levelW[i] = levelW[i - 1] / 2.0;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; levelH[i] = levelH[i - 1] / 2.0;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; levelS[i] = levelS[i - 1] * 2;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; levelN[i] = levelN[i - 1] * 4;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;</div>
<div class="line"><a name="l00117"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#ae70e8abe25e2435f42db5f4f8a637dda"> 117</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">int</span> GetLevelForDistance(<span class="keywordtype">double</span> dist)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keywordflow">if</span> (dist == 0)<span class="comment">//short circuit</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keywordflow">return</span> maxLevels;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; maxLevels - 1; i++)</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="comment">//note: level[i] is actually a lookup for level i+1</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordflow">if</span> (dist &gt; levelW[i] &amp;&amp; dist &gt; levelH[i])</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; {</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="keywordflow">return</span> i + 1;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; }</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; }</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="keywordflow">return</span> maxLevels;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; }</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;</div>
<div class="line"><a name="l00132"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a687bbf3f3fc535abdc37031c5962f53b"> 132</a></span>&#160; <span class="keyword">protected</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a> GetNode(Point p, <span class="keywordtype">int</span> level)</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; var cells = <span class="keyword">new</span> List&lt;Node&gt;(1);</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; Build(xmid, ymid, 0, cells, <span class="keyword">new</span> StringBuilder(), ctx.MakePoint(p.GetX(), p.GetY()), level);</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; <span class="keywordflow">return</span> cells[0];<span class="comment">//note cells could be longer if p on edge</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;</div>
<div class="line"><a name="l00139"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a5216415c3f514516d2c26a38bd0e7ed2"> 139</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a> GetNode(<span class="keywordtype">string</span> token)</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; {</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(token, <span class="keyword">this</span>);</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;</div>
<div class="line"><a name="l00144"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a1f9bbd4e21d06eb76a78ea1691156838"> 144</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a> GetNode(byte[] bytes, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> len)</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; {</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.NotImplementedException();</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; }</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;</div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html#a6aa22f866cbeef06775e81b29fba18fd"> 149</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> IList&lt;Node&gt; GetNodes(Shape shape, <span class="keywordtype">int</span> detailLevel, <span class="keywordtype">bool</span> inclParents)</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; var point = shape as Point;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">if</span> (point != null)</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; <span class="keywordflow">return</span> base.GetNodesAltPoint(point, detailLevel, inclParents);</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="keywordflow">return</span> base.GetNodes(shape, detailLevel, inclParents);</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> Build(<span class="keywordtype">double</span> x, <span class="keywordtype">double</span> y, <span class="keywordtype">int</span> level, List&lt;Node&gt; matches, StringBuilder str, Shape shape, <span class="keywordtype">int</span> maxLevel)</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; {</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; Debug.Assert(str.Length == level);</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="keywordtype">double</span> w = levelW[level] / 2;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="keywordtype">double</span> h = levelH[level] / 2;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; <span class="comment">// Z-Order</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <span class="comment">// http://en.wikipedia.org/wiki/Z-order_%28curve%29</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; CheckBattenberg(<span class="charliteral">&#39;A&#39;</span>, x - w, y + h, level, matches, str, shape, maxLevel);</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; CheckBattenberg(<span class="charliteral">&#39;B&#39;</span>, x + w, y + h, level, matches, str, shape, maxLevel);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; CheckBattenberg(<span class="charliteral">&#39;C&#39;</span>, x - w, y - h, level, matches, str, shape, maxLevel);</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; CheckBattenberg(<span class="charliteral">&#39;D&#39;</span>, x + w, y - h, level, matches, str, shape, maxLevel);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="comment">// possibly consider hilbert curve</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="comment">// http://en.wikipedia.org/wiki/Hilbert_curve</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="comment">// http://blog.notdot.net/2009/11/Damn-Cool-Algorithms-Spatial-indexing-with-Quadtrees-and-Hilbert-Curves</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <span class="comment">// if we actually use the range property in the query, this could be useful</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; }</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> CheckBattenberg(</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; <span class="keywordtype">char</span> c,</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; <span class="keywordtype">double</span> cx,</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; <span class="keywordtype">double</span> cy,</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; <span class="keywordtype">int</span> level,</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; List&lt;Node&gt; matches,</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; StringBuilder str,</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; Shape shape,</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="keywordtype">int</span> maxLevel)</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; {</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; Debug.Assert(str.Length == level);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keywordtype">double</span> w = levelW[level] / 2;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <span class="keywordtype">double</span> h = levelH[level] / 2;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="keywordtype">int</span> strlen = str.Length;</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; Rectangle rectangle = ctx.MakeRectangle(cx - w, cx + w, cy - h, cy + h);</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; SpatialRelation v = shape.Relate(rectangle);</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="keywordflow">if</span> (SpatialRelation.CONTAINS == v)</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; {</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; str.Append(c);</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="comment">//str.append(SpatialPrefixGrid.COVER);</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; matches.Add(<span class="keyword">new</span> QuadCell(str.ToString(), v.Transpose(), <span class="keyword">this</span>));</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; }</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (SpatialRelation.DISJOINT == v)</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; {</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; <span class="comment">// nothing</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; }</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; { <span class="comment">// SpatialRelation.WITHIN, SpatialRelation.INTERSECTS</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; str.Append(c);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <span class="keywordtype">int</span> nextLevel = level + 1;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="keywordflow">if</span> (nextLevel &gt;= maxLevel)</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <span class="comment">//str.append(SpatialPrefixGrid.INTERSECTS);</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; matches.Add(<span class="keyword">new</span> QuadCell(str.ToString(), v.Transpose(), <span class="keyword">this</span>));</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; }</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; Build(cx, cy, nextLevel, matches, str, shape, maxLevel);</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; str.Length = strlen;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; }</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160;</div>
<div class="line"><a name="l00222"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html"> 222</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a> : <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; {</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160;</div>
<div class="line"><a name="l00225"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#a28336240738de1e1f29da92d94e65329"> 225</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(String token, <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a> enclosingInstance)</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; : base(enclosingInstance, token)</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; {</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; }</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160;</div>
<div class="line"><a name="l00230"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#aae94a166f1365e68d8a63b0c29b3bd5e"> 230</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(String token, SpatialRelation shapeRel, <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a> enclosingInstance)</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; : base(enclosingInstance, token)</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; {</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; this.shapeRel = shapeRel;</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; }</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160;</div>
<div class="line"><a name="l00236"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#ad1655fb0eb19b1865ab485c863d3520b"> 236</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Reset(<span class="keywordtype">string</span> newToken)</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; {</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; base.Reset(newToken);</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; shape = null;</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; }</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160;</div>
<div class="line"><a name="l00242"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#a05ce85ef21b18d1be3a645504b13622f"> 242</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> IList&lt;Node&gt; GetSubCells()</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; var tree = (<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>)spatialPrefixTree;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; var cells = <span class="keyword">new</span> List&lt;Node&gt;(4)</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; {</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(GetTokenString() + <span class="stringliteral">&quot;A&quot;</span>, tree),</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(GetTokenString() + <span class="stringliteral">&quot;B&quot;</span>, tree),</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(GetTokenString() + <span class="stringliteral">&quot;C&quot;</span>, tree),</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html">QuadCell</a>(GetTokenString() + <span class="stringliteral">&quot;D&quot;</span>, tree)</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; };</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="keywordflow">return</span> cells;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; }</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160;</div>
<div class="line"><a name="l00255"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#a5a53c8c6a7ab957aced2dab98436326c"> 255</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">int</span> GetSubCellsSize()</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; {</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; <span class="keywordflow">return</span> 4;</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; }</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160;</div>
<div class="line"><a name="l00260"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#a2ea647400fb8677b8d80a1a2035a179e"> 260</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a> GetSubCell(Point p)</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; {</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="keywordflow">return</span> ((<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>)spatialPrefixTree).GetNode(p, GetLevel() + 1); <span class="comment">//not performant!</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; }</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; <span class="keyword">private</span> Shape shape;<span class="comment">//cache</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160;</div>
<div class="line"><a name="l00267"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree_1_1_quad_cell.html#ad516b5e7dabffcdede744f7fa83eb49d"> 267</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> Shape GetShape()</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; {</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; <span class="keywordflow">if</span> (shape == null)</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; shape = MakeShape();</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; <span class="keywordflow">return</span> shape;</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; }</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160;</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; <span class="keyword">private</span> Rectangle MakeShape()</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; {</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; String token = GetTokenString();</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; var tree = ((<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_quad_prefix_tree.html" title="Implementation of SpatialPrefixTree which uses a quad tree (http://en.wikipedia.org/wiki/Quadtree) ...">QuadPrefixTree</a>)spatialPrefixTree);</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; <span class="keywordtype">double</span> xmin = tree.xmin;</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; <span class="keywordtype">double</span> ymin = tree.ymin;</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160;</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; token.Length; i++)</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; {</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; <span class="keywordtype">char</span> c = token[i];</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; <span class="keywordflow">if</span> (<span class="charliteral">&#39;A&#39;</span> == c || <span class="charliteral">&#39;a&#39;</span> == c)</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; ymin += tree.levelH[i];</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; }</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="charliteral">&#39;B&#39;</span> == c || <span class="charliteral">&#39;b&#39;</span> == c)</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; xmin += tree.levelW[i];</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; ymin += tree.levelH[i];</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; }</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="charliteral">&#39;C&#39;</span> == c || <span class="charliteral">&#39;c&#39;</span> == c)</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="comment">// nothing really</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; }</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="charliteral">&#39;D&#39;</span> == c || <span class="charliteral">&#39;d&#39;</span> == c)</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; {</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; xmin += tree.levelW[i];</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; }</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> Exception(<span class="stringliteral">&quot;unexpected char: &quot;</span> + c);</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; }</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; <span class="keywordtype">int</span> len = token.Length;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; <span class="keywordtype">double</span> width, height;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <span class="keywordflow">if</span> (len &gt; 0)</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; {</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; width = tree.levelW[len - 1];</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; height = tree.levelH[len - 1];</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; }</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; {</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; width = tree.gridW;</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; height = tree.gridH;</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="keywordflow">return</span> spatialPrefixTree.ctx.MakeRectangle(xmin, xmin + width, ymin, ymin + height);</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; }</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; }<span class="comment">//QuadCell</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; }</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160;}</div>
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