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94 <h1>Defining Hypotheses and Algorithms</h1>
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96 <h3>Defining 1D Hypotheses</h3>
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98 <p class="whs1"><a name=bookmark>1D Arithmetic</a></p>
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102 <p class="whs2">from geompy import
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105 <p class="whs2">import smesh</p>
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109 <p># create vertices</p>
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111 <p class="whs2">Point111 = MakeVertex(
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112 0, 0, 0)</p>
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114 <p class="whs2">Point211 = MakeVertex(10,
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115 0, 0)</p>
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117 <p class="whs2">Point121 = MakeVertex(
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118 0, 10, 0)</p>
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120 <p class="whs2">Point221 = MakeVertex(10,
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123 <p class="whs2">Point112 = MakeVertex(
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124 0, 0, 10)</p>
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126 <p class="whs2">Point212 = MakeVertex(10,
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129 <p class="whs2">Point122 = MakeVertex(
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132 <p class="whs2">Point222 = MakeVertex(10,
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137 <p># create edges</p>
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139 <p class="whs2">EdgeX111 = MakeEdge(Point111,
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142 <p class="whs2">EdgeX121 = MakeEdge(Point121,
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145 <p class="whs2">EdgeX112 = MakeEdge(Point112,
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148 <p class="whs2">EdgeX122 = MakeEdge(Point122,
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151 <p class="whs2">EdgeY11 = MakeEdge(Point111,
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154 <p class="whs2">EdgeY21 = MakeEdge(Point211,
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157 <p class="whs2">EdgeY12 = MakeEdge(Point112,
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160 <p class="whs2">EdgeY22 = MakeEdge(Point212,
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163 <p class="whs2">EdgeZ111 = MakeEdge(Point111,
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166 <p class="whs2">EdgeZ211 = MakeEdge(Point211,
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169 <p class="whs2">EdgeZ121 = MakeEdge(Point121,
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172 <p class="whs2">EdgeZ221 = MakeEdge(Point221,
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177 <p># create faces</p>
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179 <p class="whs2">FaceX11 = MakeQuad(EdgeY11,
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180 EdgeZ111, EdgeY12, EdgeZ121)</p>
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182 <p class="whs2">FaceX21 = MakeQuad(EdgeY21,
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183 EdgeZ211, EdgeY22, EdgeZ221)</p>
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185 <p class="whs2">FaceY111 = MakeQuad(EdgeX111,
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186 EdgeZ111, EdgeX112, EdgeZ211)</p>
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188 <p class="whs2">FaceY121 = MakeQuad(EdgeX121,
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189 EdgeZ121, EdgeX122, EdgeZ221)</p>
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191 <p class="whs2">FaceZ11 = MakeQuad(EdgeX111,
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192 EdgeY11, EdgeX121, EdgeY21)</p>
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194 <p class="whs2">FaceZ12 = MakeQuad(EdgeX112,
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195 EdgeY12, EdgeX122, EdgeY22)</p>
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199 <p># create a solid</p>
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201 <p class="whs2">Block = MakeHexa(FaceX11,
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202 FaceX21, FaceY111, FaceY121, FaceZ11, FaceZ12)</p>
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206 <p># create a compound</p>
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208 <p class="whs2">box = MakeCompound([Block])</p>
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212 <p># add in the study</p>
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214 <p class="whs2">box_id = addToStudy(box,
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215 "Box compound")</p>
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219 <p># create a hexahedral mesh on the box</p>
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221 <p class="whs2">hexa = smesh.Mesh(box,
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222 "Box compound : hexahedrical mesh")</p>
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224 <p class="whs2">algo = hexa.Segment()</p>
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228 <p># define "NumberOfSegments" hypothesis to cut an edge in a
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229 fixed number of segments</p>
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231 <p class="whs2">algo.NumberOfSegments(4)</p>
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235 <p># create a quadrangle 2D algorithm for faces</p>
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237 <p class="whs2">hexa.Quadrangle()</p>
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241 <p># create a hexahedron 3D algorithm for solids</p>
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243 <p class="whs2">hexa.Hexahedron()</p>
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247 <p># create a local hypothesis</p>
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249 <p class="whs2">algo = hexa.Segment(EdgeX111)</p>
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253 <p># define "Arithmetic1D" hypothesis to cut an edge in several
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254 segments with arithmetic length increasing</p>
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256 <p class="whs2">algo.Arithmetic1D(1,
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261 <p># define "Propagation" hypothesis that propagates all other
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262 hypothesis on all edges on the opposite side in case of quadrangular faces</p>
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264 <p class="whs2">algo.Propagation()</p>
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268 <p># compute the mesh</p>
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270 <p class="whs2">hexa.Compute() </p>
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272 <p class="whs2"> </p>
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274 <h4><a name=bookmark9>Deflection 1D and Number of Segments</a></h4>
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276 <p class="whs2"> </p>
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278 <p class="whs2">import smesh</p>
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280 <p class="whs2">import geompy</p>
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282 <p class="whs2">import salome</p>
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284 <p class="whs2">gg = salome.ImportComponentGUI("GEOM")</p>
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286 <p class="whs2"> </p>
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288 <p class="whs3"># create vertices</p>
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290 <p class="whs2">px =
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291 geompy.MakeVertex(100., 0. ,
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294 <p class="whs2">py =
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295 geompy.MakeVertex(0. ,
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296 100., 0. )</p>
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298 <p class="whs2">pz =
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299 geompy.MakeVertex(0. ,
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300 0. , 100.)</p>
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302 <p class="whs2"> </p>
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304 <p class="whs3"># create a vector from
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307 <p class="whs2">vxy = geompy.MakeVector(px,
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310 <p class="whs2"> </p>
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312 <p class="whs3"># create an arc from
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315 <p class="whs2">arc = geompy.MakeArc(py,
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318 <p class="whs2"> </p>
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320 <p class="whs3"># create a wire</p>
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322 <p class="whs2">wire = geompy.MakeWire([vxy,
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325 <p class="whs2">isPlanarFace = 1</p>
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327 <p class="whs2"> </p>
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329 <p class="whs3"># create a face from
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332 <p class="whs2">face1 = geompy.MakeFace(wire,
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335 <p class="whs2"> </p>
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337 <p class="whs3"><span style="font-family: 'Times New Roman', serif;">#
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338 get edges from the face</span></p>
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340 <p class="whs2">vxy,arc = geompy.SubShapeAll(face1,geompy.ShapeType["EDGE"])</p>
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342 <p class="whs3"> </p>
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344 <p class="whs3"># add objects in the
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347 <p class="whs2">id_face1 = geompy.addToStudy(face1,"Face1")</p>
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349 <p class="whs2">id_arc = geompy.addToStudyInFather(face1,arc,"Arc
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352 <p class="whs2"> </p>
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354 <p class="whs3"># display faces</p>
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356 <p class="whs2">gg.createAndDisplayGO(id_face1)</p>
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358 <p class="whs2">gg.setDisplayMode(id_face1,1)</p>
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360 <p class="whs2">gg.setTransparency(id_face1,0.2)</p>
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362 <p class="whs2"> </p>
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364 <p class="whs3"># create hexahedral mesh</p>
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366 <p class="whs2">hexa = smesh.Mesh(face1,
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367 "Face compound : hexahedrical mesh")</p>
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369 <p class="whs2">algo = hexa.Triangle()</p>
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371 <p class="whs2"> </p>
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373 <p class="whs3"># define "MaxElementArea"
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376 <p class="whs2">algo.MaxElementArea(30)</p>
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378 <p class="whs2"> </p>
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380 <p class="whs3"># create a local hypothesis
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383 <p class="whs2">algo = hexa.Segment(wire)</p>
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385 <p class="whs2"> </p>
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387 <p class="whs3"># define "NumberOfSegments"
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388 hypothesis to cut a straight edge in a fixed number of segments</p>
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390 <p class="whs2">algo.NumberOfSegments(6)</p>
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392 <p class="whs2"> </p>
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394 <p class="whs3"># define a local "Deflection1D"
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395 hypothesis on the arc</p>
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397 <p class="whs2">algo = hexa.Segment(arc)</p>
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399 <p class="whs2">algo.Deflection1D(1)</p>
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401 <p class="whs2"> </p>
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403 <p class="whs2"> </p>
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405 <p class="whs3"># compute the mesh</p>
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407 <p class="whs2">hexa.Compute() </p>
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411 <h4><a name=bookmark2>Start and End Length</a></h4>
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413 <p class="whs2">from geompy import
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416 <p class="whs2">import smesh</p>
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420 <p># create vertices</p>
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422 <p class="whs2">Point111 = MakeVertex(
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423 0, 0, 0)</p>
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425 <p class="whs2">Point211 = MakeVertex(10,
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426 0, 0)</p>
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428 <p class="whs2">Point121 = MakeVertex(
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429 0, 10, 0)</p>
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431 <p class="whs2">Point221 = MakeVertex(10,
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434 <p class="whs2">Point112 = MakeVertex(
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435 0, 0, 10)</p>
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437 <p class="whs2">Point212 = MakeVertex(10,
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440 <p class="whs2">Point122 = MakeVertex(
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443 <p class="whs2">Point222 = MakeVertex(10,
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448 <p># create edges</p>
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450 <p class="whs2">EdgeX111 = MakeEdge(Point111,
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453 <p class="whs2">EdgeX121 = MakeEdge(Point121,
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456 <p class="whs2">EdgeX112 = MakeEdge(Point112,
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459 <p class="whs2">EdgeX122 = MakeEdge(Point122,
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462 <p class="whs2">EdgeY11 = MakeEdge(Point111,
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465 <p class="whs2">EdgeY21 = MakeEdge(Point211,
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468 <p class="whs2">EdgeY12 = MakeEdge(Point112,
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471 <p class="whs2">EdgeY22 = MakeEdge(Point212,
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474 <p class="whs2">EdgeZ111 = MakeEdge(Point111,
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477 <p class="whs2">EdgeZ211 = MakeEdge(Point211,
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480 <p class="whs2">EdgeZ121 = MakeEdge(Point121,
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483 <p class="whs2">EdgeZ221 = MakeEdge(Point221,
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488 <p># create faces</p>
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490 <p class="whs2">FaceX11 = MakeQuad(EdgeY11,
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491 EdgeZ111, EdgeY12, EdgeZ121)</p>
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493 <p class="whs2">FaceX21 = MakeQuad(EdgeY21,
\r
494 EdgeZ211, EdgeY22, EdgeZ221)</p>
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496 <p class="whs2">FaceY111 = MakeQuad(EdgeX111,
\r
497 EdgeZ111, EdgeX112, EdgeZ211)</p>
\r
499 <p class="whs2">FaceY121 = MakeQuad(EdgeX121,
\r
500 EdgeZ121, EdgeX122, EdgeZ221)</p>
\r
502 <p class="whs2">FaceZ11 = MakeQuad(EdgeX111,
\r
503 EdgeY11, EdgeX121, EdgeY21)</p>
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505 <p class="whs2">FaceZ12 = MakeQuad(EdgeX112,
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506 EdgeY12, EdgeX122, EdgeY22)</p>
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510 <p># create a solid</p>
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512 <p class="whs2">Block = MakeHexa(FaceX11,
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513 FaceX21, FaceY111, FaceY121, FaceZ11, FaceZ12)</p>
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517 <p># create a compound</p>
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519 <p class="whs2">box = MakeCompound([Block])</p>
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523 <p># add in the study</p>
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525 <p class="whs2">box_id = addToStudy(box,
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526 "Box compound")</p>
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530 <p># create a hexahedral mesh on the box</p>
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532 <p class="whs2">hexa = smesh.Mesh(box,
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533 "Box compound : hexahedrical mesh")</p>
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535 <p class="whs2">algo = hexa.Segment()</p>
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539 <p># define "NumberOfSegments" hypothesis to cut an edge in a
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540 fixed number of segments</p>
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542 <p class="whs2">algo.NumberOfSegments(4)</p>
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546 <p># create a quadrangle 2D algorithm for faces</p>
\r
548 <p class="whs2">hexa.Quadrangle()</p>
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552 <p># create a hexahedron 3D algorithm for solids</p>
\r
554 <p class="whs2">hexa.Hexahedron()</p>
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558 <p># create a local hypothesis</p>
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560 <p class="whs2">algo = hexa.Segment(EdgeX111)</p>
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564 <p># define "StartEndLength" hypothesis to cut an edge in several
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565 segments with increasing geometric length </p>
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567 <p class="whs2">algo.StartEndLength(1,
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572 <p># define "Propagation" hypothesis that propagates all other
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573 hypothesis on all edges on the opposite side in case of quadrangular faces</p>
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575 <p class="whs2">algo.Propagation()</p>
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579 <p># compute the mesh</p>
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581 <p class="whs2">hexa.Compute() </p>
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583 <p class="whs2"> </p>
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585 <h4><a name=bookmark3>Average Length</a></h4>
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587 <p class="whs2">from geompy import
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590 <p class="whs2">import smesh</p>
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592 <p class="whs2"> </p>
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594 <p class="whs3"># create vertices</p>
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596 <p class="whs2">Point111 = MakeVertex(
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597 0, 0, 0)</p>
\r
599 <p class="whs2">Point211 = MakeVertex(10,
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600 0, 0)</p>
\r
602 <p class="whs2">Point121 = MakeVertex(
\r
603 0, 10, 0)</p>
\r
605 <p class="whs2">Point221 = MakeVertex(10,
\r
608 <p class="whs2">Point112 = MakeVertex(
\r
609 0, 0, 10)</p>
\r
611 <p class="whs2">Point212 = MakeVertex(10,
\r
614 <p class="whs2">Point122 = MakeVertex(
\r
617 <p class="whs2">Point222 = MakeVertex(10,
\r
620 <p class="whs2"> </p>
\r
622 <p class="whs3"># create edges</p>
\r
624 <p class="whs2">EdgeX111 = MakeEdge(Point111,
\r
627 <p class="whs2">EdgeX121 = MakeEdge(Point121,
\r
630 <p class="whs2">EdgeX112 = MakeEdge(Point112,
\r
633 <p class="whs2">EdgeX122 = MakeEdge(Point122,
\r
636 <p class="whs2">EdgeY11 = MakeEdge(Point111,
\r
639 <p class="whs2">EdgeY21 = MakeEdge(Point211,
\r
642 <p class="whs2">EdgeY12 = MakeEdge(Point112,
\r
645 <p class="whs2">EdgeY22 = MakeEdge(Point212,
\r
648 <p class="whs2">EdgeZ111 = MakeEdge(Point111,
\r
651 <p class="whs2">EdgeZ211 = MakeEdge(Point211,
\r
654 <p class="whs2">EdgeZ121 = MakeEdge(Point121,
\r
657 <p class="whs2">EdgeZ221 = MakeEdge(Point221,
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660 <p class="whs2"> </p>
\r
662 <p class="whs3"># create faces</p>
\r
664 <p class="whs2">FaceX11 = MakeQuad(EdgeY11,
\r
665 EdgeZ111, EdgeY12, EdgeZ121)</p>
\r
667 <p class="whs2">FaceX21 = MakeQuad(EdgeY21,
\r
668 EdgeZ211, EdgeY22, EdgeZ221)</p>
\r
670 <p class="whs2">FaceY111 = MakeQuad(EdgeX111,
\r
671 EdgeZ111, EdgeX112, EdgeZ211)</p>
\r
673 <p class="whs2">FaceY121 = MakeQuad(EdgeX121,
\r
674 EdgeZ121, EdgeX122, EdgeZ221)</p>
\r
676 <p class="whs2">FaceZ11 = MakeQuad(EdgeX111,
\r
677 EdgeY11, EdgeX121, EdgeY21)</p>
\r
679 <p class="whs2">FaceZ12 = MakeQuad(EdgeX112,
\r
680 EdgeY12, EdgeX122, EdgeY22)</p>
\r
682 <p class="whs2"> </p>
\r
684 <p class="whs3"># create a solid</p>
\r
686 <p class="whs2">Block = MakeHexa(FaceX11,
\r
687 FaceX21, FaceY111, FaceY121, FaceZ11, FaceZ12)</p>
\r
689 <p class="whs2"> </p>
\r
691 <p class="whs3"># create a compound</p>
\r
693 <p class="whs2">box = MakeCompound([Block])</p>
\r
695 <p class="whs2"> </p>
\r
697 <p class="whs3"># add in the study</p>
\r
699 <p class="whs2">box_id = addToStudy(box,
\r
700 "Box compound")</p>
\r
702 <p class="whs2"> </p>
\r
704 <p class="whs3"># create a hexahedral
\r
705 mesh on the box</p>
\r
707 <p class="whs2">hexa = smesh.Mesh(box,
\r
708 "Box compound : hexahedrical mesh")</p>
\r
710 <p class="whs2">algo = hexa.Segment()</p>
\r
712 <p class="whs2"> </p>
\r
714 <p class="whs3"># define "NumberOfSegments"
\r
715 hypothesis to cut an edge in a fixed number of segments</p>
\r
717 <p class="whs2">algo.NumberOfSegments(4)</p>
\r
719 <p class="whs2"> </p>
\r
721 <p class="whs3"># create a quadrangle
\r
722 2D algorithm for faces</p>
\r
724 <p class="whs2">hexa.Quadrangle()</p>
\r
726 <p class="whs2"> </p>
\r
728 <p class="whs3"># create a hexahedron
\r
729 3D algorithm for solids</p>
\r
731 <p class="whs2">hexa.Hexahedron()</p>
\r
733 <p class="whs2"> </p>
\r
735 <p class="whs3"># create a local hypothesis</p>
\r
737 <p class="whs2">algo = hexa.Segment(EdgeX111)</p>
\r
739 <p class="whs2"> </p>
\r
741 <p class="whs3"># define "LocalLength"
\r
742 hypothesis to cut an edge in several segments with the same length</p>
\r
744 <p class="whs2">algo.LocalLength(2)</p>
\r
746 <p class="whs2"> </p>
\r
748 <p class="whs3"># define "Propagation"
\r
749 hypothesis that propagates all other hypothesis on all edges on<span style="font-family: 'Times New Roman', serif;">
\r
750 the opposite side in case of quadrangular faces</span></p>
\r
752 <p class="whs2">algo.Propagation()</p>
\r
754 <p class="whs2"> </p>
\r
756 <p class="whs3"># compute the mesh</p>
\r
758 <p class="whs2">hexa.Compute() </p>
\r
760 <p class="whs2"> </p>
\r
762 <p class="whs2"> </p>
\r
764 <h3>Defining 2D and 3D hypotheses</h3>
\r
766 <h4><a name=bookmark4>Maximum Element Area</a></h4>
\r
768 <p class="whs4"><span style="font-family: 'Lucida Console', monospace;">import
\r
771 <p class="whs4">import geompy</p>
\r
773 <p class="whs4">import salome</p>
\r
775 <p class="whs4"> </p>
\r
777 <p class="whs5"># create a face</p>
\r
779 <p class="whs4">px =
\r
780 geompy.MakeVertex(100., 0. ,
\r
783 <p class="whs4">py =
\r
784 geompy.MakeVertex(0. ,
\r
785 100., 0. )</p>
\r
787 <p class="whs4">pz =
\r
788 geompy.MakeVertex(0. ,
\r
789 0. , 100.)</p>
\r
791 <p class="whs4"> </p>
\r
793 <p class="whs4">vxy = geompy.MakeVector(px,
\r
796 <p class="whs4">arc = geompy.MakeArc(py,
\r
799 <p class="whs4">wire = geompy.MakeWire([vxy,
\r
802 <p class="whs4"> </p>
\r
804 <p class="whs4">isPlanarFace = 1</p>
\r
806 <p class="whs4">face = geompy.MakeFace(wire,
\r
809 <p class="whs4"> </p>
\r
811 <p class="whs5"># add the face in the
\r
814 <p class="whs4">id_face = geompy.addToStudy(face,
\r
815 "Face to be meshed")</p>
\r
817 <p class="whs4"> </p>
\r
819 <p class="whs5"># create a mesh</p>
\r
821 <p class="whs4">tria_mesh = smesh.Mesh(face,
\r
822 "Face : triangulation")</p>
\r
824 <p class="whs4"> </p>
\r
826 <p class="whs5"># define 1D meshing:</p>
\r
828 <p class="whs4">algo = tria_mesh.Segment()</p>
\r
830 <p class="whs4">algo.NumberOfSegments(20)</p>
\r
832 <p class="whs4"> </p>
\r
834 <p class="whs5"># define 2D meshing:</p>
\r
836 <p class="whs5"> </p>
\r
838 <p class="whs5"># assign triangulation
\r
841 <p class="whs4">algo = tria_mesh.Triangle()</p>
\r
843 <p class="whs4"> </p>
\r
845 <p class="whs5"># apply "Max Element
\r
846 Area" hypothesis to each triangle</p>
\r
848 <p class="whs4">algo.MaxElementArea(100)</p>
\r
850 <p class="whs4"> </p>
\r
852 <p class="whs5"># compute the mesh</p>
\r
854 <p class="whs4">tria_mesh.Compute()
\r
857 <p class="whs4"> </p>
\r
859 <h4><a name=bookmark5>Maximum Element Volume</a></h4>
\r
861 <p class="whs4"><span style="font-family: 'Lucida Console', monospace;">import
\r
864 <p class="whs4">import geompy</p>
\r
866 <p class="whs4">import StdMeshers</p>
\r
868 <p class="whs4">import NETGENPlugin</p>
\r
870 <p class="whs4"> </p>
\r
872 <p class="whs4">smesh = salome.lcc.FindOrLoadComponent("FactoryServer",
\r
873 "SMESH")</p>
\r
875 <p class="whs4">smeshgui = salome.ImportComponentGUI("SMESH")</p>
\r
877 <p class="whs4">smeshgui.Init(salome.myStudyId);</p>
\r
879 <p class="whs4"> </p>
\r
881 <p class="whs5"># create a box</p>
\r
883 <p class="whs4">box = geompy.MakeCylinderRH(30,
\r
884 50) #MakeBox(0., 0., 0., </p>
\r
886 <p class="whs4">100., 200., 300.)</p>
\r
888 <p class="whs4"> </p>
\r
890 <p class="whs5"># add the box in the
\r
893 <p class="whs4">idbox = geompy.addToStudy(box,
\r
894 "box")</p>
\r
896 <p class="whs4"> </p>
\r
898 <p class="whs5"># create a set of hypotheses</p>
\r
900 <p class="whs5"> </p>
\r
902 <p class="whs5"># Number of Segments</p>
\r
904 <p class="whs4">numberOfSegments
\r
907 <p class="whs4">hypNbSeg = smesh.CreateHypothesis("NumberOfSegments",
\r
908 "libStdMeshersEngine.so")</p>
\r
910 <p class="whs4">hypNbSeg.SetNumberOfSegments(numberOfSegments)</p>
\r
912 <p class="whs4">print hypNbSeg.GetName()</p>
\r
914 <p class="whs4">print hypNbSeg.GetNumberOfSegments()</p>
\r
916 <p class="whs4">smeshgui.SetName(salome.ObjectToID(hypNbSeg),
\r
917 "NumberOfSegments_7")</p>
\r
919 <p class="whs4"> </p>
\r
921 <p class="whs5"># Max Element Area</p>
\r
923 <p class="whs4">maxElementArea =
\r
926 <p class="whs4">hypArea = smesh.CreateHypothesis("MaxElementArea",
\r
927 "libStdMeshersEngine.so")</p>
\r
929 <p class="whs4">hypArea.SetMaxElementArea(maxElementArea)</p>
\r
931 <p class="whs4">print hypArea.GetName()</p>
\r
933 <p class="whs4">print hypArea.GetMaxElementArea()</p>
\r
935 <p class="whs4">smeshgui.SetName(salome.ObjectToID(hypArea),
\r
936 "MaxElementArea_800")</p>
\r
938 <p class="whs4"> </p>
\r
940 <p class="whs5"># Max Element Volume</p>
\r
942 <p class="whs4">maxElementVolume
\r
945 <p class="whs4">hypVolume = smesh.CreateHypothesis("MaxElementVolume",
\r
946 "libStdMeshersEngine.so")</p>
\r
948 <p class="whs4">hypVolume.SetMaxElementVolume(maxElementVolume)</p>
\r
950 <p class="whs4">print hypVolume.GetName()</p>
\r
952 <p class="whs4">print hypVolume.GetMaxElementVolume()</p>
\r
954 <p class="whs4">smeshgui.SetName(salome.ObjectToID(hypVolume),
\r
955 "MaxElementVolume_900")</p>
\r
957 <p class="whs4"> </p>
\r
959 <p class="whs5"># create a set of algorithms</p>
\r
961 <p class="whs5"> </p>
\r
963 <p class="whs5"># Regular_1D</p>
\r
965 <p class="whs4">regular1D = smesh.CreateHypothesis("Regular_1D",
\r
966 "libStdMeshersEngine.so")</p>
\r
968 <p class="whs4">smeshgui.SetName(salome.ObjectToID(regular1D),
\r
969 "Wire Discretisation")</p>
\r
971 <p class="whs4"> </p>
\r
973 <p class="whs5"># MEFISTO_2D</p>
\r
975 <p class="whs4">mefisto2D = smesh.CreateHypothesis("MEFISTO_2D",
\r
976 "libStdMeshersEngine.so")</p>
\r
978 <p class="whs4">smeshgui.SetName(salome.ObjectToID(mefisto2D),
\r
979 "MEFISTO_2D")</p>
\r
981 <p class="whs4"> </p>
\r
983 <p class="whs5"># NETGEN_3D (Tetrahedron
\r
984 meshing algorithm)</p>
\r
986 <p class="whs4">tetra3D = smesh.CreateHypothesis("NETGEN_3D",
\r
987 "libNETGENEngine.so")</p>
\r
989 <p class="whs4">smeshgui.SetName(salome.ObjectToID(tetra3D),
\r
990 "NETGEN_3D")</p>
\r
992 <p class="whs4"> </p>
\r
994 <p class="whs5"># initialize a mesh
\r
997 <p class="whs4">mesh = smesh.CreateMesh(box)</p>
\r
999 <p class="whs4">smeshgui.SetName(salome.ObjectToID(mesh),
\r
1000 "MeshBox")</p>
\r
1002 <p class="whs4"> </p>
\r
1004 <p class="whs5"># add hypotheses and
\r
1005 algorithms to the box</p>
\r
1007 <p class="whs4">mesh.AddHypothesis(box,hypNbSeg)</p>
\r
1009 <p class="whs4">mesh.AddHypothesis(box,hypArea)</p>
\r
1011 <p class="whs4">mesh.AddHypothesis(box,hypVolume)</p>
\r
1013 <p class="whs4">mesh.AddHypothesis(box,regular1D)</p>
\r
1015 <p class="whs4">mesh.AddHypothesis(box,mefisto2D)</p>
\r
1017 <p class="whs4">mesh.AddHypothesis(box,tetra3D)</p>
\r
1019 <p class="whs4"> </p>
\r
1021 <p class="whs5"># compute the mesh</p>
\r
1023 <p class="whs4">ret = smesh.Compute(mesh,box)</p>
\r
1025 <p class="whs4">if ret == 0:</p>
\r
1027 <p class="whs4"> print
\r
1028 "probleme when computing the mesh"</p>
\r
1030 <p class="whs4">else:</p>
\r
1032 <p class="whs4"> print
\r
1033 "Computation succeded"</p>
\r
1035 <p class="whs4">salome.sg.updateObjBrowser(1)
\r
1038 <p class="whs4"> </p>
\r
1040 <h4><a name=bookmark6>Length from Edges</a></h4>
\r
1042 <p class="whs2"><span style="font-family: 'Lucida Console', monospace;">import
\r
1045 <p class="whs2">import geompy</p>
\r
1047 <p class="whs2">import smesh</p>
\r
1049 <p class="whs2"> </p>
\r
1051 <p class="whs3"># create sketchers</p>
\r
1053 <p class="whs2">sketcher1 = geompy.MakeSketcher("Sketcher:F
\r
1054 0 0:TT 70 0:TT 70 70:TT 0 70:WW")</p>
\r
1056 <p class="whs2">sketcher2 = geompy.MakeSketcher("Sketcher:F
\r
1057 20 20:TT 50 20:TT 50 50:TT 20 50:WW")</p>
\r
1059 <p class="whs2">isPlanarFace = 1</p>
\r
1061 <p class="whs2"> </p>
\r
1063 <p class="whs3"># create a face from
\r
1066 <p class="whs2">face1 = geompy.MakeFaces([sketcher1,
\r
1067 sketcher2],isPlanarFace)</p>
\r
1069 <p class="whs2"> </p>
\r
1071 <p class="whs3"># add object in the study</p>
\r
1073 <p class="whs2">id_face1 = geompy.addToStudy(face1,"Face1")</p>
\r
1075 <p class="whs2"> </p>
\r
1077 <p class="whs3"># create a mesh</p>
\r
1079 <p class="whs2">tria = smesh.Mesh(face1,
\r
1080 "Face : triangle 2D mesh")</p>
\r
1082 <p class="whs2"> </p>
\r
1084 <p class="whs3"># Define 1D meshing</p>
\r
1086 <p class="whs2">algo = tria.Segment()</p>
\r
1088 <p class="whs2">algo.NumberOfSegments(2)</p>
\r
1090 <p class="whs2"> </p>
\r
1092 <p class="whs3"># create and assign the
\r
1093 algorithm for 2D meshing with triangles</p>
\r
1095 <p class="whs2">algo = tria.Triangle()</p>
\r
1097 <p class="whs2"> </p>
\r
1099 <p class="whs3"># create and assign "LengthFromEdges"
\r
1100 hypothesis to build triangles </p>
\r
1102 <p class="whs3"># based on the length
\r
1103 of the edges taken from the wire</p>
\r
1105 <p class="whs2">algo.LengthFromEdges()</p>
\r
1107 <p class="whs2"> </p>
\r
1109 <p class="whs3"># compute the mesh</p>
\r
1111 <p class="whs2">tria.Compute() </p>
\r
1113 <p class="whs2"> </p>
\r
1115 <h3>Defining Additional Hypotheses</h3>
\r
1117 <h4><a name=bookmark7>Propagation</a></h4>
\r
1119 <p class="whs2"><span style="font-family: 'Lucida Console', monospace;">from
\r
1120 geompy import *</span></p>
\r
1122 <p class="whs2">import smesh</p>
\r
1124 <p class="whs2"> </p>
\r
1126 <p class="whs3"># create vertices</p>
\r
1128 <p class="whs2">Point111 = MakeVertex(
\r
1129 0, 0, 0)</p>
\r
1131 <p class="whs2">Point211 = MakeVertex(10,
\r
1132 0, 0)</p>
\r
1134 <p class="whs2">Point121 = MakeVertex(
\r
1135 0, 10, 0)</p>
\r
1137 <p class="whs2">Point221 = MakeVertex(10,
\r
1140 <p class="whs2">Point112 = MakeVertex(
\r
1141 0, 0, 10)</p>
\r
1143 <p class="whs2">Point212 = MakeVertex(10,
\r
1146 <p class="whs2">Point122 = MakeVertex(
\r
1149 <p class="whs2">Point222 = MakeVertex(10,
\r
1152 <p class="whs2"> </p>
\r
1154 <p class="whs3"># create edges</p>
\r
1156 <p class="whs2">EdgeX111 = MakeEdge(Point111,
\r
1159 <p class="whs2">EdgeX121 = MakeEdge(Point121,
\r
1162 <p class="whs2">EdgeX112 = MakeEdge(Point112,
\r
1165 <p class="whs2">EdgeX122 = MakeEdge(Point122,
\r
1168 <p class="whs2">EdgeY11 = MakeEdge(Point111,
\r
1171 <p class="whs2">EdgeY21 = MakeEdge(Point211,
\r
1174 <p class="whs2">EdgeY12 = MakeEdge(Point112,
\r
1177 <p class="whs2">EdgeY22 = MakeEdge(Point212,
\r
1180 <p class="whs2">EdgeZ111 = MakeEdge(Point111,
\r
1183 <p class="whs2">EdgeZ211 = MakeEdge(Point211,
\r
1186 <p class="whs2">EdgeZ121 = MakeEdge(Point121,
\r
1189 <p class="whs2">EdgeZ221 = MakeEdge(Point221,
\r
1192 <p class="whs2"> </p>
\r
1194 <p class="whs3"># create faces</p>
\r
1196 <p class="whs2">FaceX11 = MakeQuad(EdgeY11,
\r
1197 EdgeZ111, EdgeY12, EdgeZ121)</p>
\r
1199 <p class="whs2">FaceX21 = MakeQuad(EdgeY21,
\r
1200 EdgeZ211, EdgeY22, EdgeZ221)</p>
\r
1202 <p class="whs2">FaceY111 = MakeQuad(EdgeX111,
\r
1203 EdgeZ111, EdgeX112, EdgeZ211)</p>
\r
1205 <p class="whs2">FaceY121 = MakeQuad(EdgeX121,
\r
1206 EdgeZ121, EdgeX122, EdgeZ221)</p>
\r
1208 <p class="whs2">FaceZ11 = MakeQuad(EdgeX111,
\r
1209 EdgeY11, EdgeX121, EdgeY21)</p>
\r
1211 <p class="whs2">FaceZ12 = MakeQuad(EdgeX112,
\r
1212 EdgeY12, EdgeX122, EdgeY22)</p>
\r
1214 <p class="whs2"> </p>
\r
1216 <p class="whs3"># create a solid</p>
\r
1218 <p class="whs2">box = MakeHexa(FaceX11,
\r
1219 FaceX21, FaceY111, FaceY121, FaceZ11, FaceZ12)</p>
\r
1221 <p class="whs2"> </p>
\r
1223 <p class="whs3"># add in the study</p>
\r
1225 <p class="whs2">box_id = addToStudy(box,
\r
1226 "Box")</p>
\r
1228 <p class="whs2"> </p>
\r
1230 <p class="whs3"># create a hexahedral
\r
1231 mesh on the box</p>
\r
1233 <p class="whs2">hexa = smesh.Mesh(box,
\r
1234 "Box : hexahedrical mesh")</p>
\r
1236 <p class="whs2"> </p>
\r
1238 <p class="whs3"># create an 1D algorithm
\r
1241 <p class="whs2">algo = hexa.Segment()</p>
\r
1243 <p class="whs2"> </p>
\r
1245 <p class="whs3"># define "NumberOfSegments"
\r
1246 hypothesis to cut an edge in a fixed number of segments</p>
\r
1248 <p class="whs2">algo.NumberOfSegments(4)</p>
\r
1250 <p class="whs2"> </p>
\r
1252 <p class="whs3"># create a quadrangle
\r
1253 2D algorithm for faces</p>
\r
1255 <p class="whs2">hexa.Quadrangle()</p>
\r
1257 <p class="whs2"> </p>
\r
1259 <p class="whs3"># create a hexahedron
\r
1260 3D algorithm for solids</p>
\r
1262 <p class="whs2">hexa.Hexahedron()</p>
\r
1264 <p class="whs2"> </p>
\r
1266 <p class="whs3"># create a local hypothesis</p>
\r
1268 <p class="whs2">algo = hexa.Segment(EdgeX111)</p>
\r
1270 <p class="whs2"> </p>
\r
1272 <p class="whs3"># define "Arithmetic1D"
\r
1273 hypothesis to cut an edge<span style="font-family: 'Times New Roman', serif;">
\r
1274 in several segments with increasing length</span></p>
\r
1276 <p class="whs2">algo.Arithmetic1D(1,
\r
1279 <p class="whs2"> </p>
\r
1281 <p class="whs3"># define "Propagation"
\r
1282 hypothesis that propagates all other 1D hypotheses</p>
\r
1284 <p class="whs3"># from all edges on the
\r
1285 opposite side of a face in case of quadrangular faces</p>
\r
1287 <p class="whs2">algo.Propagation()</p>
\r
1289 <p class="whs2"> </p>
\r
1291 <p class="whs3"># compute the mesh</p>
\r
1293 <p class="whs2">hexa.Compute() </p>
\r
1295 <h3><a name=bookmark8>Defining Meshing Algorithms</a></h3>
\r
1297 <p class="whs4"><span style="font-family: 'Lucida Console', monospace;">import
\r
1300 <p class="whs4">import StdMeshers</p>
\r
1302 <p class="whs4">import NETGENPlugin</p>
\r
1304 <p class="whs4"> </p>
\r
1306 <p class="whs4">smesh = salome.lcc.FindOrLoadComponent("FactoryServer",
\r
1307 "SMESH")</p>
\r
1309 <p class="whs4">smeshgui = salome.ImportComponentGUI("SMESH")</p>
\r
1311 <p class="whs4">smeshgui.Init(salome.myStudyId);</p>
\r
1313 <p class="whs6"> </p>
\r
1315 <p class="whs6"># create algorithms</p>
\r
1317 <p class="whs4">print "--------------------------
\r
1318 create Algorithms"</p>
\r
1320 <p class="whs4">print "--------------------------
\r
1321 Regular_1D (Wire discretisation)"</p>
\r
1323 <p class="whs4">regular1D = smesh.CreateHypothesis("Regular_1D",
\r
1324 "libStdMeshersEngine.so")</p>
\r
1326 <p class="whs4">smeshgui.SetName(salome.ObjectToID(regular1D),
\r
1327 "Wire Discretisation")</p>
\r
1329 <p class="whs4"> </p>
\r
1331 <p class="whs4">print "--------------------------
\r
1332 MEFISTO_2D (Triangle meshing algorithm)"</p>
\r
1334 <p class="whs4">mefisto2D = smesh.CreateHypothesis("MEFISTO_2D",
\r
1335 "libStdMeshersEngine.so")</p>
\r
1337 <p class="whs4">smeshgui.SetName(salome.ObjectToID(mefisto2D),
\r
1338 "MEFISTO_2D")</p>
\r
1340 <p class="whs4"> </p>
\r
1342 <p class="whs4">print "--------------------------
\r
1343 Quadrangle_2D (Quadrangle meshing algorithm)"</p>
\r
1345 <p class="whs4">quad2D = smesh.CreateHypothesis(
\r
1346 "Quadrangle_2D", "libStdMeshersEngine.so" )</p>
\r
1348 <p class="whs4">smeshgui.SetName(salome.ObjectToID(quad2D),
\r
1349 "Quadrangle_2D")</p>
\r
1351 <p class="whs4"> </p>
\r
1353 <p class="whs4">print "--------------------------
\r
1354 Hexa_3D (Hexahedron meshing algorithm)"</p>
\r
1356 <p class="whs4">hexa3D = smesh.CreateHypothesis("Hexa_3D",
\r
1357 "libStdMeshersEngine.so")</p>
\r
1359 <p class="whs4">smeshgui.SetName(salome.ObjectToID(hexa3D),
\r
1360 "HEXA_3D")</p>
\r
1362 <p class="whs4"> </p>
\r
1364 <p class="whs4">print "--------------------------
\r
1365 NETGEN_3D (Tetrahedron meshing algorithm)"</p>
\r
1367 <p class="whs4">netgen3D = smesh.CreateHypothesis("NETGEN_3D",
\r
1368 "libNETGENEngine.so")</p>
\r
1370 <p class="whs4">smeshgui.SetName(salome.ObjectToID(netgen3D),
\r
1371 "NETGEN_3D")</p>
\r
1373 <p class="whs4">salome.sg.updateObjBrowser(1)</p>
\r
1375 <p class="whs6"> </p>
\r
1377 <script type="text/javascript" language="javascript1.2">
\r
1379 if (window.writeIntopicBar)
\r
1380 writeIntopicBar(0);
\r