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105 <h1>Using operations on groups</h1>
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107 <p><span style="font-weight: bold;"><B><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> </B></span>In SMESH you can
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108 perform Boolean
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109 operations on groups such as:</p>
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113 <ul type="disc" class="whs2">
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115 <li class=kadov-p><p class="whs3"><a href="#Union">Union</a>
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118 <li class=kadov-p><p class="whs3"><a href="#Intersection">Intersection</a></p></li>
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120 <li class=kadov-p><p class="whs3"><a href="#Cut">Cut</a></p></li>
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125 <h3><a name=Union></a>Union of two groups</h3>
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127 <p>This operation allows to create a new group in such a way that all mesh
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128 elements that are present in the initial groups will be added to the new
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133 <p class=TODO>To union two groups:</p>
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135 <p class=TODO> </p>
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137 <p class="whs4">1. In the <span style="font-weight: bold;"><B>Mesh
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138 </B></span>menu select the <span style="font-weight: bold;"><B>Union Groups </B></span>item.
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139 The following dialog box will appear:</p>
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141 <p class="whs4"> </p>
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143 <p class="whs4"><img src="../image77.gif" width="290px" height="245px" border="0" class="img_whs5"></p>
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147 <p class="whs4">In this dialog box you should specify the
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148 name<span style="font-weight: bold;"> <B></B></span>of the resulting group and
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149 two groups which will be united.</p>
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151 <p class="whs4"> </p>
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153 <p class="whs4">2. Click the <span style="font-weight: bold;"><B>OK
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154 </B></span>or <span style="font-weight: bold;"><B> Apply
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155 </B></span>button to confirm creation of the group. </p>
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161 <h3><a name=Intersection></a>Intersection of two groups</h3>
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163 <p>This operation allows to create a new group in such a way that all mesh
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164 elements that are present in both initial groups are added to the new
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169 <p class=TODO>To intersect two groups:</p>
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171 <p class=TODO> </p>
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173 <p class="whs4">1. In the <span style="font-weight: bold;"><B>Mesh
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174 </B></span>menu select the <span style="font-weight: bold;"><B>Intersect Groups
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175 </B></span>item. The following dialog box will appear:</p>
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177 <p class="whs4"> </p>
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179 <p class="whs4"><img src="../image76.gif" width="290px" height="245px" border="0" class="img_whs5"></p>
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183 <p class="whs4">In this dialog box you should specify the
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184 name<span style="font-weight: bold;"> <B></B></span>of the resulting group and
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185 two groups which will be intersected.</p>
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187 <p class="whs4"> </p>
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189 <p class="whs4">2. Click the <span style="font-weight: bold;"><B>OK
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190 </B></span>or <span style="font-weight: bold;"><B> Apply
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191 </B></span>button to confirm creation of the group. </p>
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197 <h3><a name=Cut></a>Cut of two groups</h3>
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199 <p>This operation allows to create a new group in such a way that all mesh
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200 elements that are present in the main group but are absent in the tool
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201 group are added to the new one.</p>
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205 <p class=TODO>To cut two groups:</p>
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207 <p class=TODO> </p>
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209 <p class="whs4">1. In the <span style="font-weight: bold;"><B>Mesh
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210 </B></span>menu select the <span style="font-weight: bold;"><B>Cut Groups </B></span>item.
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211 The following dialog box will appear:</p>
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213 <p class="whs4"> </p>
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215 <p class="whs4"><img src="../image75.gif" width="290px" height="244px" border="0" class="img_whs6"></p>
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219 <p class="whs4">In this dialog box you should specify the
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220 name<span style="font-weight: bold;"> <B></B></span>of the resulting group and
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221 two groups which will be cut.</p>
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223 <p class="whs4"> </p>
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225 <p class="whs4">2. Click the <span style="font-weight: bold;"><B>OK
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226 </B></span>or <span style="font-weight: bold;"><B> Apply
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227 </B></span>button to confirm creation of the group. </p>
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