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AvnaimEtAl2x2DetSignComputer_8ih_source.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> /**</div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  * This program is free software: you can redistribute it and/or modify</div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  * it under the terms of the GNU Lesser General Public License as</div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>  * published by the Free Software Foundation, either version 3 of the</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  * License, or (at your option) any later version.</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  *</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  * This program is distributed in the hope that it will be useful,</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  * but WITHOUT ANY WARRANTY; without even the implied warranty of</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  * GNU General Public License for more details.</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  *</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  * You should have received a copy of the GNU General Public License</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  * along with this program. If not, see <http://www.gnu.org/licenses/>.</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  *</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  **/</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> /**</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  * @file AvnaimEtAl2x2DetSignComputer.ih</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  * @author Tristan Roussillon (\c tristan.roussillon@liris.cnrs.fr )</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  * Laboratoire d'InfoRmatique en Image et Systèmes d'information - LIRIS (CNRS, UMR 5205), CNRS, France</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  *</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  * @date 2013/11/19</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  *</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  * Implementation of inline methods defined in AvnaimEtAl2x2DetSignComputer.h</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  *</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * This file is part of the DGtal library.</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  */</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> //////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> #include <cstdlib></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> //////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> ///////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> // IMPLEMENTATION of inline methods.</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> ///////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> ///////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> template <typename T></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> inline</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::AvnaimEtAl2x2DetSignComputer()</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  : myA(NumberTraits<Integer>::ZERO), </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  myB(NumberTraits<Integer>::ZERO), </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  myMax(NumberTraits<Integer>::ONE)</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  //I must compute myMax at runtime because base^exponent</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  //is not equal to std::numeric_limits<Integer>::max()</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  //for non integer type, like float (2^24) or double (2^53)</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  for (unsigned int i = 0; i < (exponent-1); i++)</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  myMax *= base; </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  //I must finish the computation like this, because</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  //the last representable number is base^exponent - 1</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  myMax -= NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  myMax += (myMax + NumberTraits<Integer>::ONE); </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  ASSERT( myMax > NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> }</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> template <typename T></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> inline</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> void </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::init(const ArgumentInteger& aA, const ArgumentInteger& aB)</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  ASSERT( aA <= myMax ); </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  ASSERT( aB <= myMax ); </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  myA = aA; </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  myB = aB;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> template <typename T></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> inline</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> int</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::quadrant(const Integer& aX, const Integer& aY) const</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  ASSERT( aX != 0 ); </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  ASSERT( aY != 0 );</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  if (aX > 0)</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  if (aY > 0)</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  return 0; </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  else </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  return 3; </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  }</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  else</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  if (aY > 0)</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  return 1; </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  else </div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  return 2; </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  } </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> }</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> template <typename T></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> inline</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> typename DGtal::AvnaimEtAl2x2DetSignComputer<T>::Integer</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::recursiveComputation(const Integer& aA, const Integer& aB, </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  const Integer& aX, const Integer& aY) const</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  // std::cerr << " >>> " << aA << "." << aY << " - " << aB << "." << aX << std::endl; </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  ASSERT( aA > NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  ASSERT( aB > NumberTraits<Integer>::ZERO );</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  ASSERT( aX > NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  ASSERT( aY > NumberTraits<Integer>::ZERO );</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  ASSERT( aB < aY ); </div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  Integer q = detail::EuclideanDivisionHelper<Integer>::compute(aX, aA);</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  Integer xr = aX - q*aA;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  // std::cout << " >>> xr= " << xr;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  if (aB > ( myMax / q)) {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  } else {</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  if (xr == NumberTraits<Integer>::ZERO) {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  Integer qb = q * aB; </div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  if (aY > qb) {</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  } else if (aY < qb) {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  } else { //(aY == qb)</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  return NumberTraits<Integer>::ZERO;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  } else {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  Integer yr = aY - q * aB;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  // std::cout << ", yr= " << yr << std::endl;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  </div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  if (yr <= NumberTraits<Integer>::ZERO) </div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  if (yr >= aB) </div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  if (2*xr < aA) {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  if (2*yr >= aB) {</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  } else { //(2*yr < aB)</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  return computation(aA, aB, xr, yr);</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  } else if (2*xr > aA) {</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  if (2*yr <= aB) {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  } else { //(2*yr > aB)</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  return -computation(aA, aB, (aA-xr), (aB-yr));</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  }</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  } else { //(2*xr == aA)</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  if (2*yr == aB) {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  return NumberTraits<Integer>::ZERO;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  } else if (2*yr < aB) { </div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  } else { //(2*yr > aB)</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  } </div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  </div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> }</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> template <typename T></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> inline</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> typename DGtal::AvnaimEtAl2x2DetSignComputer<T>::Integer</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::computation(const Integer& aA, const Integer& aB, </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  const Integer& aX, const Integer& aY) const</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> {</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  // std::cerr << " >>> " << aA << "." << aY << " - " << aB << "." << aX << std::endl; </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  ASSERT( aA > NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  ASSERT( aB > NumberTraits<Integer>::ZERO );</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  ASSERT( aX > NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  ASSERT( aY > NumberTraits<Integer>::ZERO );</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  if (aA == aX) {</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  if (aB == aY) {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  return NumberTraits<Integer>::ZERO;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  } else if (aB < aY) { </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  } else { //(aB > aY)</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  } else if (aA < aX) {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  if (aB >= aY) {</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  } else { //(aB < aY) </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  return recursiveComputation(aA, aB, aX, aY);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  }</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  } else { //(aA > aX)</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  if (aB <= aY) {</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  } else { //(aB > aY) </div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  return -recursiveComputation(aX, aY, aA, aB);</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  }</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> }</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  </div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> template <typename T></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> inline</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> typename DGtal::AvnaimEtAl2x2DetSignComputer<T>::ResultInteger</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::operator()(const ArgumentInteger& aX, const ArgumentInteger& aY) const</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> {</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  ASSERT( aX <= myMax ); </div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  ASSERT( aY <= myMax ); </div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  // zeros</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  if ( (myA == NumberTraits<Integer>::ZERO) || (aY == NumberTraits<Integer>::ZERO) ) {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  if ( (aX == NumberTraits<Integer>::ZERO) || (myB == NumberTraits<Integer>::ZERO) ) {</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  return NumberTraits<Integer>::ZERO;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  } else {</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  ASSERT( aX != NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  ASSERT( myB != NumberTraits<Integer>::ZERO );</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  if (myB < NumberTraits<Integer>::ZERO) {</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  if (aX < NumberTraits<Integer>::ZERO) </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  else </div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  return NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  } else {</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  if (aX < NumberTraits<Integer>::ZERO) </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  else </div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  } else if ( (aX == NumberTraits<Integer>::ZERO) || (myB == NumberTraits<Integer>::ZERO) ) {</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  ASSERT( myA != NumberTraits<Integer>::ZERO ); </div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  ASSERT( aY != NumberTraits<Integer>::ZERO );</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  if (aY < NumberTraits<Integer>::ZERO) {</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  if (myA < NumberTraits<Integer>::ZERO) return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  else return -NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  } else {</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  if (myA < NumberTraits<Integer>::ZERO) return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  else return NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  } else {</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  // quadrants</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  int qab = quadrant(myA, myB);</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  int qxy = quadrant(aX, aY);</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  // std::cerr << " >>> quadrants " << qab << ", " << qxy << std::endl; </div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  </div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  switch (qab)</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  case 0: </div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  switch (qxy)</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  {</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  case 0: </div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  return computation(myA, myB, aX, aY); </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  case 1: </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  return NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  case 2: </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  return -computation(myA, myB, -aX, -aY); </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  case 3: </div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  return -NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  default: </div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  FATAL_ERROR( false ); </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  return NumberTraits<Integer>::ZERO; </div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  break; </div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  case 1: </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  switch (qxy)</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  {</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  case 0: </div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  return -NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  case 1: </div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  return -computation(-myA, myB, -aX, aY); </div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  case 2: </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  return NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  case 3: </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  return computation(-myA, myB, aX, -aY); </div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  default: </div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  FATAL_ERROR( false ); </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  return NumberTraits<Integer>::ZERO; </div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  break; </div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  case 2: </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  switch (qxy)</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  case 0: </div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  return -computation(-myA, -myB, aX, aY); </div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  case 1: </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  return -NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  case 2: </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  return computation(-myA, -myB, -aX, -aY); </div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  case 3: </div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  return NumberTraits<Integer>::ONE;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  default: </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  FATAL_ERROR( false ); </div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  return NumberTraits<Integer>::ZERO;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  }</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  break; </div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  case 3: </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  switch (qxy)</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  {</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  case 0: </div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  return NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  case 1: </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  return computation(myA, -myB, -aX, aY); </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  case 2: </div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  return -NumberTraits<Integer>::ONE; </div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  case 3: </div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  return -computation(myA, -myB, aX, -aY); </div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  default: </div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  FATAL_ERROR( false ); </div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  return NumberTraits<Integer>::ZERO; </div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  break; </div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  default: </div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  FATAL_ERROR( false ); </div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  return NumberTraits<Integer>::ZERO; </div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> }</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> // ---------------------------------------------------------------------------</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> template <typename T></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> inline</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> typename DGtal::AvnaimEtAl2x2DetSignComputer<T>::ResultInteger</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::operator()(const ArgumentInteger& aA, const ArgumentInteger& aB, </div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  const ArgumentInteger& aX, const ArgumentInteger& aY)</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> {</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  ASSERT( aA <= myMax ); </div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  ASSERT( aB <= myMax ); </div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  init(aA,aB); </div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  </div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  ASSERT( aX <= myMax ); </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  ASSERT( aY <= myMax ); </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  return operator()(aX, aY); </div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> }</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  </div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> // ----------------------------------------------------------------------------</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> template <typename T></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> inline</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> void</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::selfDisplay ( std::ostream & out ) const</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> {</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  out << "[AvnaimEtAl2x2DetSignComputer]";</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> }</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  </div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> // ----------------------------------------------------------------------------</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> template <typename T></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> inline</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> bool</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> DGtal::AvnaimEtAl2x2DetSignComputer<T>::isValid() const</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> {</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  return true;</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> }</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> ///////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> // Implementation of inline functions //</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  </div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> template <typename T></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> inline</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> std::ostream&</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> DGtal::operator<< ( std::ostream & out, </div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  const AvnaimEtAl2x2DetSignComputer<T> & object )</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> {</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  object.selfDisplay( out );</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  return out;</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> }</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  </div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> // //</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> ///////////////////////////////////////////////////////////////////////////////</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  </div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  </div>
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