1 | // ----------------------------------------------------------------------- |
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2 | // Object2D.cc: Member functions for the Object2D class. |
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3 | // ----------------------------------------------------------------------- |
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4 | // Copyright (C) 2006, Matthew Whiting, ATNF |
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5 | // |
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6 | // This program is free software; you can redistribute it and/or modify it |
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7 | // under the terms of the GNU General Public License as published by the |
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8 | // Free Software Foundation; either version 2 of the License, or (at your |
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9 | // option) any later version. |
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10 | // |
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11 | // Duchamp is distributed in the hope that it will be useful, but WITHOUT |
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12 | // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 | // for more details. |
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15 | // |
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16 | // You should have received a copy of the GNU General Public License |
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17 | // along with Duchamp; if not, write to the Free Software Foundation, |
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18 | // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
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19 | // |
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20 | // Correspondence concerning Duchamp may be directed to: |
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21 | // Internet email: Matthew.Whiting [at] atnf.csiro.au |
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22 | // Postal address: Dr. Matthew Whiting |
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23 | // Australia Telescope National Facility, CSIRO |
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24 | // PO Box 76 |
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25 | // Epping NSW 1710 |
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26 | // AUSTRALIA |
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27 | // ----------------------------------------------------------------------- |
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28 | #include <duchamp/PixelMap/Object2D.hh> |
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29 | #include <duchamp/PixelMap/Scan.hh> |
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30 | #include <duchamp/PixelMap/Voxel.hh> |
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31 | #include <iostream> |
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32 | #include <vector> |
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33 | #include <list> |
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34 | #include <algorithm> |
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35 | #include <math.h> |
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36 | |
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37 | namespace PixelInfo |
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38 | { |
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39 | |
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40 | Object2D::Object2D() |
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41 | { |
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42 | this->numPix = 0; |
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43 | } |
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44 | |
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45 | Object2D::Object2D(const Object2D& o) |
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46 | { |
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47 | operator=(o); |
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48 | } |
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49 | |
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50 | Object2D& Object2D::operator= (const Object2D& o) |
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51 | { |
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52 | if(this == &o) return *this; |
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53 | this->scanlist = o.scanlist; |
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54 | this->numPix = o.numPix; |
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55 | this->xSum = o.xSum; |
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56 | this->ySum = o.ySum; |
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57 | this->xmin = o.xmin; |
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58 | this->ymin = o.ymin; |
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59 | this->xmax = o.xmax; |
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60 | this->ymax = o.ymax; |
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61 | return *this; |
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62 | } |
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63 | //------------------------------------------------------ |
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64 | |
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65 | Object2D operator+ (Object2D lhs, Object2D rhs) |
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66 | { |
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67 | Object2D output = lhs; |
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68 | for(std::vector<Scan>::iterator s=rhs.scanlist.begin();s!=rhs.scanlist.end();s++) |
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69 | output.addScan(*s); |
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70 | // for(size_t s=0;s<rhs.scanlist.size();s++) output.addScan(rhs.scanlist[s]); |
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71 | return output; |
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72 | } |
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73 | |
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74 | //------------------------------------------------------ |
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75 | void Object2D::addPixel(long &x, long &y) |
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76 | { |
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77 | /// This function has three parts to it: |
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78 | /// <ul><li> First, it searches through the existing scans to see if |
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79 | /// a) there is a scan of the same y-value present, and |
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80 | /// b) whether the (x,y) pixel lies in or next to an existing |
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81 | /// Scan. If so, it is added and the Scan is grown if need be. |
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82 | /// If this isn't the case, a new Scan of length 1 is added to |
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83 | /// the list. |
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84 | /// <li> If the Scan list was altered, all are checked to see whether |
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85 | /// there is now a case of Scans touching. If so, they are |
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86 | /// combined and added to the end of the list. |
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87 | /// <li> If the pixel was added, the parameters are updated and the |
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88 | /// pixel counter incremented. |
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89 | /// </ul> |
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90 | |
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91 | |
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92 | bool flagDone=false,flagChanged=false, isNew=false; |
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93 | |
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94 | // size_t scanCount = 0, size=this->scanlist.size(); |
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95 | // while(!flagDone && (scanCount<size) ){ |
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96 | // if(y == this->scanlist[scanCount].itsY){ // if the y value is already in the list |
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97 | // if(this->scanlist[scanCount].isInScan(x,y)) flagDone = true; // pixel already here. |
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98 | // else{ // it's a new pixel! |
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99 | // if((x==(this->scanlist[scanCount].itsX-1)) || (x == (this->scanlist[scanCount].getXmax()+1)) ){ |
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100 | // // if it is adjacent to the existing range, add to that range |
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101 | // if(x==(this->scanlist[scanCount].itsX-1)) this->scanlist[scanCount].growLeft(); |
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102 | // else this->scanlist[scanCount].growRight(); |
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103 | // flagDone = true; |
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104 | // flagChanged = true; |
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105 | // isNew = true; |
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106 | // } |
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107 | // } |
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108 | // } |
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109 | // scanCount++; |
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110 | // } |
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111 | for (std::vector<Scan>::iterator scan=this->scanlist.begin(); !flagDone && scan!=this->scanlist.end(); scan++){ |
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112 | if(y == scan->itsY){ // if the y value is already in the list |
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113 | if(scan->isInScan(x,y)) flagDone = true; // pixel already here. |
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114 | else{ // it's a new pixel! |
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115 | if((x==(scan->itsX-1)) || (x == (scan->getXmax()+1)) ){ |
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116 | // if it is adjacent to the existing range, add to that range |
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117 | if(x==(scan->itsX-1)) scan->growLeft(); |
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118 | else scan->growRight(); |
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119 | flagDone = true; |
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120 | flagChanged = true; |
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121 | isNew = true; |
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122 | } |
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123 | } |
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124 | } |
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125 | } |
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126 | |
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127 | if(!flagDone){ |
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128 | // we got to the end of the scanlist, so there is no pre-existing scan with this y value |
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129 | // add a new scan consisting of just this pixel |
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130 | Scan newOne(y,x,1); |
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131 | this->scanlist.push_back(newOne); |
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132 | // if(this->scanlist.size()>1) this->order(); |
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133 | isNew = true; |
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134 | } |
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135 | else if(flagChanged){ |
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136 | // this is true only if one of the pre-existing scans has changed |
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137 | // |
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138 | // need to clean up, to see if there is a case of two scans when |
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139 | // there should be one. Only need to look at scans with matching |
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140 | // y-value |
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141 | // |
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142 | // because there has been only one pixel added, only 2 AT MOST |
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143 | // scans will need to be combined, so once we meet a pair that |
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144 | // overlap, we can finish. |
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145 | |
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146 | bool combined = false; |
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147 | // int size = this->scanlist.size(); |
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148 | // int count1=0; |
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149 | // while(!combined && count1<size){ |
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150 | // if(this->scanlist[count1].itsY==y){ |
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151 | // int count2 = count1 + 1; |
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152 | // while(!combined && count2<size){ |
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153 | // if(this->scanlist[count2].itsY==y){ |
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154 | // combined = touching(this->scanlist[count1], this->scanlist[count2]); |
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155 | // if(combined){ |
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156 | // for(int i=0;i<this->scanlist[count2].getXlen();i++) this->scanlist[count1].growRight(); |
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157 | // iter = this->scanlist.begin() + count2; |
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158 | // this->scanlist.erase(iter); |
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159 | // } |
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160 | // } |
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161 | // count2++; |
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162 | // } |
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163 | // } |
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164 | // count1++; |
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165 | // } |
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166 | std::vector<Scan>::iterator scan1=this->scanlist.begin(),scan2; |
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167 | for (; !combined && scan1!=this->scanlist.end(); scan1++){ |
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168 | if(scan1->itsY==y){ |
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169 | scan2=scan1; |
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170 | scan2++; |
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171 | for(; !combined && scan2!=this->scanlist.end(); scan2++){ |
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172 | if(scan2->itsY==y){ |
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173 | combined = touching(*scan1,*scan2); |
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174 | if(combined){ |
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175 | // for(int i=0;i<scan2->getXlen();i++) scan1->growRight(); |
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176 | scan1->addScan(*scan2); |
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177 | this->scanlist.erase(scan2); |
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178 | } |
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179 | } |
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180 | } |
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181 | } |
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182 | } |
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183 | |
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184 | } |
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185 | |
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186 | if(isNew){ |
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187 | // update the centres, mins, maxs and increment the pixel counter |
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188 | if(this->numPix==0){ |
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189 | this->xSum = this->xmin = this->xmax = x; |
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190 | this->ySum = this->ymin = this->ymax = y; |
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191 | } |
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192 | else{ |
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193 | this->xSum += x; |
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194 | this->ySum += y; |
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195 | if(x<this->xmin) this->xmin = x; |
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196 | if(x>this->xmax) this->xmax = x; |
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197 | if(y<this->ymin) this->ymin = y; |
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198 | if(y>this->ymax) this->ymax = y; |
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199 | } |
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200 | this->numPix++; |
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201 | } |
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202 | |
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203 | } |
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204 | //------------------------------------------------------ |
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205 | |
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206 | void Object2D::addScan(Scan &scan) |
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207 | { |
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208 | long y=scan.getY(); |
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209 | for(long x=scan.getX();x<=scan.getXmax();x++) this->addPixel(x,y); |
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210 | |
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211 | } |
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212 | //------------------------------------------------------ |
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213 | |
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214 | bool Object2D::isInObject(long x, long y) |
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215 | { |
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216 | |
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217 | std::vector<Scan>::iterator scn; |
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218 | bool returnval=false; |
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219 | for(scn=this->scanlist.begin();scn!=this->scanlist.end()&&!returnval;scn++){ |
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220 | |
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221 | returnval = ((y == scn->itsY) && (x>= scn->itsX) && (x<=scn->getXmax())); |
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222 | |
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223 | } |
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224 | |
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225 | return returnval; |
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226 | |
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227 | } |
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228 | //------------------------------------------------------ |
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229 | |
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230 | std::ostream& operator<< ( std::ostream& theStream, Object2D& obj) |
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231 | { |
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232 | if(obj.scanlist.size()>1) obj.order(); |
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233 | // for(size_t i=0;i<obj.scanlist.size();i++) |
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234 | // theStream << obj.scanlist[i] << "\n"; |
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235 | for(std::vector<Scan>::iterator s=obj.scanlist.begin();s!=obj.scanlist.end();s++) |
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236 | theStream << *s << "\n"; |
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237 | theStream<<"---\n"; |
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238 | return theStream; |
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239 | |
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240 | } |
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241 | //------------------------------------------------------ |
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242 | |
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243 | void Object2D::calcParams() |
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244 | { |
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245 | this->xSum = 0; |
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246 | this->ySum = 0; |
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247 | std::vector<Scan>::iterator s; |
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248 | for(s=this->scanlist.begin();s!=this->scanlist.end();s++){ |
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249 | |
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250 | if(s==this->scanlist.begin()){ |
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251 | this->ymin = this->ymax = s->itsY; |
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252 | this->xmin = s->itsX; |
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253 | this->xmax = s->getXmax(); |
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254 | } |
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255 | else{ |
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256 | if(this->ymin>s->itsY) this->ymin = s->itsY; |
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257 | if(this->xmin>s->itsX) this->xmin = s->itsX; |
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258 | if(this->ymax<s->itsY) this->ymax = s->itsY; |
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259 | if(this->xmax<s->getXmax()) this->xmax = s->getXmax(); |
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260 | } |
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261 | |
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262 | this->ySum += s->itsY*s->getXlen(); |
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263 | for(int x=s->itsX;x<=s->getXmax();x++) |
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264 | this->xSum += x; |
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265 | |
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266 | } |
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267 | |
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268 | } |
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269 | //------------------------------------------------------ |
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270 | |
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271 | void Object2D::cleanup() |
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272 | { |
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273 | // size_t counter=0, compCounter=1; |
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274 | // std::vector<Scan>::iterator iter; |
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275 | // while(counter < this->scanlist.size()) |
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276 | // { |
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277 | // compCounter = counter + 1; |
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278 | |
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279 | // while( compCounter < this->scanlist.size() ) { |
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280 | |
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281 | // Scan scan1 = this->scanlist[counter]; |
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282 | // Scan scan2 = this->scanlist[compCounter]; |
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283 | // if(overlap(scan1,scan2)){ |
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284 | // Scan newscan = unite(scan1,scan2); |
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285 | // iter = this->scanlist.begin()+compCounter; |
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286 | // this->scanlist.erase(iter); |
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287 | // iter = this->scanlist.begin()+counter; |
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288 | // this->scanlist.erase(iter); |
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289 | // this->scanlist.push_back(newscan); |
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290 | // compCounter = counter + 1; |
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291 | // } |
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292 | // else compCounter++; |
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293 | |
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294 | // } |
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295 | |
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296 | // counter++; |
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297 | // } |
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298 | std::vector<Scan>::iterator s1=this->scanlist.begin(),s2; |
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299 | for (; s1!=this->scanlist.end(); s1++){ |
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300 | s2=s1; s2++; |
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301 | for (; s2!=this->scanlist.end(); s2++){ |
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302 | |
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303 | if(overlap(*s1,*s2)){ |
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304 | s1->addScan(*s2); |
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305 | this->scanlist.erase(s2); |
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306 | } |
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307 | } |
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308 | } |
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309 | |
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310 | } |
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311 | //------------------------------------------------------ |
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312 | |
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313 | long Object2D::getNumDistinctY() |
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314 | { |
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315 | std::vector<long> ylist; |
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316 | if(this->scanlist.size()==0) return 0; |
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317 | if(this->scanlist.size()==1) return 1; |
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318 | // ylist.push_back(this->scanlist[0].itsY); |
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319 | std::vector<Scan>::iterator scn; |
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320 | for(scn=this->scanlist.begin();scn!=this->scanlist.end();scn++){ |
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321 | bool inList = false; |
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322 | unsigned int j=0; |
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323 | long y = scn->itsY; |
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324 | while(!inList && j<ylist.size()){ |
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325 | if(y==ylist[j]) inList=true; |
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326 | j++; |
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327 | }; |
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328 | if(!inList) ylist.push_back(y); |
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329 | } |
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330 | return ylist.size(); |
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331 | } |
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332 | //------------------------------------------------------ |
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333 | |
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334 | long Object2D::getNumDistinctX() |
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335 | { |
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336 | std::vector<long> xlist; |
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337 | if(this->scanlist.size()==0) return 0; |
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338 | if(this->scanlist.size()==1) return 1; |
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339 | // for(int x=this->scanlist[0].itsX;x<this->scanlist[0].getXmax();x++) |
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340 | // xlist.push_back(x); |
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341 | std::vector<Scan>::iterator scn; |
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342 | for(scn=this->scanlist.begin();scn!=this->scanlist.end();scn++){ |
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343 | for(int x=scn->itsX;x<scn->getXmax();x++){ |
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344 | bool inList = false; |
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345 | unsigned int j=0; |
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346 | while(!inList && j<xlist.size()){ |
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347 | if(x==xlist[j]) inList=true; |
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348 | j++; |
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349 | }; |
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350 | if(!inList) xlist.push_back(x); |
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351 | } |
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352 | } |
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353 | return xlist.size(); |
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354 | } |
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355 | //------------------------------------------------------ |
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356 | |
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357 | bool Object2D::scanOverlaps(Scan &scan) |
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358 | { |
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359 | bool returnval = false; |
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360 | // unsigned int scanCount=0; |
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361 | for(std::vector<Scan>::iterator s=this->scanlist.begin();!returnval&&s!=this->scanlist.end();s++){ |
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362 | // while(!returnval && scanCount<this->scanlist.size()){ |
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363 | // returnval = returnval || overlap(scan,this->scanlist[scanCount++]); |
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364 | returnval = returnval || s->overlaps(scan); |
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365 | } |
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366 | return returnval; |
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367 | } |
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368 | |
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369 | //------------------------------------------------------ |
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370 | |
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371 | void Object2D::addOffsets(long xoff, long yoff) |
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372 | { |
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373 | std::vector<Scan>::iterator scn; |
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374 | for(scn=this->scanlist.begin();scn!=this->scanlist.end();scn++) |
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375 | scn->addOffsets(xoff,yoff); |
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376 | this->xSum += xoff*numPix; |
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377 | this->xmin += xoff; xmax += xoff; |
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378 | this->ySum += yoff*numPix; |
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379 | this->ymin += yoff; ymax += yoff; |
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380 | } |
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381 | |
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382 | //------------------------------------------------------ |
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383 | |
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384 | double Object2D::getPositionAngle() |
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385 | { |
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386 | |
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387 | int sumxx=0; |
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388 | int sumyy=0; |
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389 | int sumxy=0; |
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390 | std::vector<Scan>::iterator scn=this->scanlist.begin(); |
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391 | for(;scn!=this->scanlist.end();scn++){ |
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392 | sumyy += (scn->itsY*scn->itsY)*scn->itsXLen; |
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393 | for(int x=scn->itsX;x<=scn->getXmax();x++){ |
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394 | sumxx += x*x; |
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395 | sumxy += x*scn->itsY; |
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396 | } |
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397 | } |
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398 | |
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399 | // Calculate net moments |
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400 | double mxx = sumxx - this->xSum*this->xSum / double(this->numPix); |
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401 | double myy = sumyy - this->ySum*this->ySum / double(this->numPix); |
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402 | double mxy = sumxy - this->xSum*this->ySum / double(this->numPix); |
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403 | |
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404 | if(mxy==0){ |
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405 | if(mxx>myy) return M_PI/2.; |
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406 | else return 0.; |
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407 | } |
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408 | |
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409 | // Angle of the minimum moment |
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410 | double tantheta = (mxx - myy + sqrt( (mxx-myy)*(mxx-myy) + 4.*mxy*mxy))/(2.*mxy); |
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411 | |
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412 | return atan(tantheta); |
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413 | } |
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414 | |
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415 | //------------------------------------------------------ |
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416 | |
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417 | std::pair<double,double> Object2D::getPrincipleAxes() |
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418 | { |
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419 | |
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420 | double theta = this->getPositionAngle(); |
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421 | double x0 = this->getXaverage(); |
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422 | double y0 = this->getYaverage(); |
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423 | std::vector<double> majorAxes, minorAxes; |
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424 | std::vector<Scan>::iterator scn=this->scanlist.begin(); |
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425 | for(;scn!=this->scanlist.end();scn++){ |
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426 | for(int x=scn->itsX;x<=scn->getXmax();x++){ |
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427 | majorAxes.push_back((x-x0+0.5)*cos(theta) + (scn->itsY-y0+0.5)*sin(theta)); |
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428 | minorAxes.push_back((x-x0+0.5)*sin(theta) + (scn->itsY-y0+0.5)*cos(theta)); |
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429 | } |
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430 | } |
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431 | |
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432 | std::sort(majorAxes.begin(),majorAxes.end()); |
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433 | std::sort(minorAxes.begin(),minorAxes.end()); |
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434 | int size = majorAxes.size(); |
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435 | std::pair<double,double> axes; |
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436 | axes.first = fabs(majorAxes[0]-majorAxes[size-1]); |
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437 | axes.second = fabs(minorAxes[0]-minorAxes[size-1]); |
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438 | if(axes.first<0.5) axes.first=0.5; |
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439 | if(axes.second<0.5) axes.second=0.5; |
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440 | return axes; |
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441 | |
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442 | } |
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443 | |
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444 | |
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445 | //------------------------------------------------------ |
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446 | |
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447 | |
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448 | bool Object2D::canMerge(Object2D &other, float threshS, bool flagAdj) |
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449 | { |
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450 | long gap; |
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451 | if(flagAdj) gap = 1; |
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452 | else gap = long( ceil(threshS) ); |
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453 | bool near = this->isNear(other,gap); |
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454 | if(near) return this->isClose(other,threshS,flagAdj); |
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455 | else return near; |
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456 | } |
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457 | |
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458 | //------------------------------------------------------ |
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459 | |
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460 | bool Object2D::isNear(Object2D &other, long gap) |
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461 | { |
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462 | bool areNear; |
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463 | // Test X ranges |
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464 | if((this->xmin-gap)<other.xmin) areNear=((this->xmax+gap)>=other.xmin); |
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465 | else areNear=(other.xmax>=(this->xmin-gap)); |
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466 | // Test Y ranges |
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467 | if(areNear){ |
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468 | if((this->ymin-gap)<other.ymin) areNear=areNear&&((this->ymax+gap)>=other.ymin); |
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469 | else areNear=areNear&&(other.ymax>=(this->ymin-gap)); |
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470 | } |
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471 | return areNear; |
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472 | } |
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473 | |
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474 | //------------------------------------------------------ |
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475 | |
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476 | bool Object2D::isClose(Object2D &other, float threshS, bool flagAdj) |
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477 | { |
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478 | |
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479 | long gap = long(ceil(threshS)); |
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480 | if(flagAdj) gap=1; |
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481 | |
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482 | bool close = false; |
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483 | |
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484 | long ycommonMin=std::max(this->ymin-gap,other.ymin)-gap; |
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485 | long ycommonMax=std::min(this->ymax+gap,other.ymax)+gap; |
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486 | |
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487 | std::vector<Scan>::iterator iter1,iter2; |
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488 | for(iter1=this->scanlist.begin();!close && iter1!=this->scanlist.end();iter1++){ |
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489 | if(iter1->itsY >= ycommonMin && iter1->itsY<=ycommonMax){ |
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490 | for(iter2=other.scanlist.begin();!close && iter2!=other.scanlist.end();iter2++){ |
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491 | if(iter2->itsY >= ycommonMin && iter2->itsY<=ycommonMax){ |
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492 | |
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493 | if(abs(iter1->itsY-iter2->itsY)<=gap){ |
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494 | if(flagAdj) { |
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495 | if((iter1->itsX-gap)>iter2->itsX) close=((iter2->itsX+iter2->itsXLen-1)>=(iter1->itsX-gap)); |
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496 | else close = ( (iter1->itsX+iter1->itsXLen+gap-1)>=iter2->itsX); |
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497 | } |
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498 | else close = (minSep(*iter1,*iter2) < threshS); |
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499 | } |
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500 | |
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501 | } |
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502 | } |
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503 | } |
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504 | } |
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505 | |
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506 | return close; |
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507 | |
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508 | } |
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509 | |
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510 | |
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511 | |
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512 | } |
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