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73 <body><script type="text/javascript" language="javascript1.2">
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79 <h1>Measurement Tools</h1>
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81 <h3>Point Coordinates</h3>
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83 <p class="whs1">import math</p>
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85 <p class="whs1">import geompy</p>
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87 <p class="whs1"> </p>
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89 <p class="whs2"># create a point</p>
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91 <p class="whs1">point = geompy.MakeVertex(15.,
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94 <p class="whs1"> </p>
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96 <p class="whs2"># get the coordinates
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97 of the point and check its values</p>
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99 <p class="whs1">coords = geompy.PointCoordinates(point)</p>
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101 <p class="whs1"> </p>
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103 <p class="whs2"># check the obtained
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104 coordinate values </p>
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106 <p class="whs1">tolerance = 1.e-07</p>
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108 <p class="whs1">def IsEqual(val1,
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109 val2): return (math.fabs(val1 - val2) < tolerance)</p>
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111 <p class="whs1"> </p>
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113 <p class="whs1">if IsEqual(coords[0],
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114 15.) and IsEqual(coords[1], 23.) and IsEqual(coords[2], 80.):</p>
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116 <p class="whs1"> print
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117 "All values are OK."</p>
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119 <p class="whs1">else :</p>
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121 <p class="whs1"> print
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122 "Coordinates of point must be (15, 23, 80), but returned (",</p>
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124 <p class="whs1"> print
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125 coords[0], ", ", coords[1], ", ", coords[2], ")"</p>
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127 <p><span style="font-family: 'Lucida Console', monospace;"> pass</span>
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130 <h3>Basic Properties</h3>
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132 <p class="whs1">import geompy</p>
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134 <p class="whs1">import math</p>
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138 <p># create a box</p>
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140 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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142 <p class="whs1">props = geompy.BasicProperties(box)</p>
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144 <p class="whs1">print "\nBox
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145 100x30x100 Basic Properties:"</p>
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147 <p class="whs1">print " Wires
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148 length: ", props[0]</p>
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150 <p class="whs1">print " Surface
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151 area: ", props[1]</p>
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153 <p class="whs1">print " Volume
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154 :
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155 ", props[2]</p>
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157 <p class="whs1">length = math.sqrt((props[0]
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158 - 1840)*(props[0] - 1840))</p>
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160 <p class="whs1">area = math.sqrt((props[1]
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161 - 32000)*(props[1] - 32000))</p>
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163 <p class="whs1">volume = math.sqrt((props[2]
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164 - 300000)*(props[2] - 300000))</p>
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166 <p class="whs1">if length > 1e-7
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167 or area > 1e-7 or volume > 1e-7:</p>
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169 <p class="whs1"> print
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170 "While must be:"</p>
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172 <p class="whs1"> print
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173 " Wires length: ", 1840</p>
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175 <p class="whs1"> print
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176 " Surface area: ", 32000</p>
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178 <p class="whs1"> print
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179 " Volume :
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180 ", 300000.</p>
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182 <h3>Center of masses</h3>
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184 <p class="whs1">import geompy</p>
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186 <p class="whs1">import math</p>
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188 <p class="whs1"> </p>
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190 <p class="whs2"># create a box</p>
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192 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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194 <p class="whs1">cm = geompy.MakeCDG(box)</p>
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196 <p class="whs1">if cm is None:</p>
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198 <p class="whs1"> raise
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199 RuntimeError, "MakeCDG(box) failed"</p>
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201 <p class="whs1">else:</p>
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203 <p class="whs1"> print
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204 "\nCentre of gravity of box has been successfully obtained:"</p>
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206 <p class="whs1"> coords
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207 = geompy.PointCoordinates(cm)</p>
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209 <p class="whs1"> print
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210 "(", coords[0], ", ", coords[1], ", ", coords[2],
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213 <p class="whs1"> dx
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214 = math.sqrt((coords[0] - 50)*(coords[0] - 50))</p>
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216 <p class="whs1"> dy
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217 = math.sqrt((coords[1] - 15)*(coords[1] - 15))</p>
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219 <p class="whs1"> dz
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220 = math.sqrt((coords[2] - 50)*(coords[2] - 50))</p>
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222 <p class="whs1"> if
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223 dx > 1e-7 or dy > 1e-7 or dz > 1e-7:</p>
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225 <p class="whs1"> print
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226 "But must be (50, 15, 50)" </p>
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230 <p class="whs1">import geompy</p>
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232 <p class="whs1">import math</p>
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234 <p class="whs1"> </p>
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236 <p class="whs2"># create a box</p>
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238 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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240 <p class="whs1">In = geompy.Inertia(box)</p>
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242 <p class="whs1">print "\nInertia
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243 matrix of box 100x30x100:"</p>
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245 <p class="whs1">print " (",
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246 In[0], ", ", In[1], ", ", In[2], ")"</p>
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248 <p class="whs1">print " (",
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249 In[3], ", ", In[4], ", ", In[5], ")"</p>
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251 <p class="whs1">print " (",
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252 In[6], ", ", In[7], ", ", In[8], ")"</p>
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254 <p class="whs1">print "Main moments
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255 of inertia of box 100x30x100:"</p>
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257 <p class="whs1">print " Ix =
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258 ", In[9], ", Iy = ", In[10], ", Iz = ", In[11]
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261 <p class="whs1"> </p>
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263 <h3>Bounding Box</h3>
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265 <p class="whs1">import geompy</p>
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267 <p class="whs1"> </p>
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269 <p class="whs2"># create a box</p>
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271 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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273 <p class="whs1">bb = geompy.BoundingBox(box)</p>
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275 <p class="whs1">print "\nBounding
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276 Box of box 100x30x100:"</p>
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278 <p class="whs1">print " Xmin
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279 = ", bb[0], ", Xmax = ", bb[1]</p>
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281 <p class="whs1">print " Ymin
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282 = ", bb[2], ", Ymax = ", bb[3]</p>
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284 <p class="whs1">print " Zmin
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285 = ", bb[4], ", Zmax = ", bb[5] </p>
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287 <p class="whs1"> </p>
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289 <p class="whs1"> </p>
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291 <h3>Minimal Distance </h3>
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293 <p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
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296 <p class="whs1"> </p>
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298 <p class="whs2"># create boxes</p>
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300 <p class="whs1">box1 = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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302 <p class="whs1">box2 = geompy.MakeBox(105,0,0,200,30,100)</p>
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304 <p class="whs1">min_dist = geompy.MinDistance(box1,box2)</p>
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306 <p class="whs1">print "\nMinimal
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307 distance between box1 and box2 = ", min_dist </p>
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309 <p class="whs1"> </p>
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313 <p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
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316 <p class="whs1"> </p>
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318 <p class="whs2"># create a box</p>
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320 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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322 <p class="whs1">Toler = geompy.Tolerance(box)</p>
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324 <p class="whs1">print "\nBox
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325 100x30x100 tolerance:"</p>
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327 <p class="whs1">print " Face
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328 min. tolerance: ", Toler[0]</p>
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330 <p class="whs1">print " Face
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331 max. tolerance: ", Toler[1]</p>
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333 <p class="whs1">print " Edge
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334 min. tolerance: ", Toler[2]</p>
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336 <p class="whs1">print " Edge
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337 max. tolerance: ", Toler[3]</p>
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339 <p class="whs1">print " Vertex
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340 min. tolerance: ", Toler[4]</p>
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342 <p class="whs1">print " Vertex
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343 max. tolerance: ", Toler[5] </p>
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345 <p class="whs1"> </p>
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349 <p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
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352 <p class="whs1"> </p>
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354 <p class="whs2"># create a box</p>
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356 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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358 <p class="whs1">Descr = geompy.WhatIs(box)</p>
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360 <p class="whs1">print "\nBox
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361 100x30x100 description:"</p>
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363 <p class="whs1">print Descr </p>
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365 <p class="whs1"> </p>
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367 <h3>Check Shape</h3>
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369 <p class="whs1">import geompy</p>
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371 <p class="whs1"> </p>
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373 <p class="whs2"># create a box</p>
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375 <p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
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377 <p class="whs1">IsValid = geompy.CheckShape(box)</p>
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379 <p class="whs1">if IsValid == 0:</p>
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381 <p class="whs1"> raise
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382 RuntimeError, "Invalid box created"</p>
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384 <p class="whs1">else:</p>
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386 <p class="whs1"> print
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387 "\nBox is valid" </p>
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389 <p class="whs1"> </p>
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391 <p class="whs1"> </p>
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393 <h3>Check Compound of Blocks</h3>
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395 <p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
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398 <p class="whs1">import salome</p>
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400 <p class="whs1">gg = salome.ImportComponentGUI("GEOM")</p>
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402 <p class="whs1"> </p>
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404 <p class="whs2"># create boxes</p>
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406 <p class="whs1">box1 = geompy.MakeBox(0,0,0,100,50,100)</p>
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408 <p class="whs1">box2 = geompy.MakeBox(100,0,0,250,50,100)</p>
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410 <p class="whs1"> </p>
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412 <p class="whs2"># make a compound</p>
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414 <p class="whs1">compound = geompy.MakeCompound([box1,
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417 <p class="whs1"> </p>
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419 <p class="whs2"># glue the faces of the
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422 <p class="whs1">tolerance = 1e-5</p>
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424 <p class="whs1">glue = geompy.MakeGlueFaces(compound,
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427 <p class="whs1">IsValid = geompy.CheckCompoundOfBlocks(glue)</p>
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429 <p class="whs1">if IsValid == 0:</p>
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431 <p class="whs1"> raise
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432 RuntimeError, "Invalid compound created"</p>
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434 <p class="whs1">else:</p>
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436 <p class="whs1"> print
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437 "\nCompound is valid" </p>
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439 <p class="whs1"> </p>
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441 <p class="whs1"> </p>
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443 <p class="whs1"> </p>
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