opExtractSurface using derived feature

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  Jake_Rosenfeld Moderator, Onshape Employees, Developers Posts: 1,646

  January 2018

  Maybe try this?
  
  

  // Get all the faces from the derived feature
  const inputFaces = qEntityFilter(qCreatedBy(definition.profile), EntityType.FACE);
  
  // Get all one-sided edges of the input faces
  const oneSidedEdges = qEdgeTopology(qEdgeAdjacent(inputFaces, EntityType.EDGE), EdgeTopology.LAMINAR);
  
  // Get all the faces touching the one sided edges
  const externalFaces = qEdgeAdjacent(oneSidedEdges, EntityType.FACE);
  
  // use externalFaces as your "faces" input to opExtractSurface

  
  

  Jake Rosenfeld - Modeling Team

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  papawo Member, Developers Posts: 206 PRO

  January 2018 edited January 2018

  Thank you ! It works! can you further explain this code?
  but i must say qEdgeTopology should be qEdgeTopologyFilter

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  kevin_o_toole_1 Onshape Employees, Developers, HDM Posts: 565

  January 2018

  A different approach:
  
  Add a function at the bottom named qOuterSketchRegions:

  </code>export function qOuterSketchRegions(features is FeatureList) returns Query
  {
      var query = [];
      return qUnion(query);
      for (var feature in features)
      {
          query = append(query, qSketchRegion(feature.key, true)); // true to filter out inner loops
      }
  }
  </pre><div>(This function uses the standard&nbsp;<span><a href="https://cad.onshape.com/FsDoc/library.html#qSketchRegion-Id-boolean">qSketchRegion</a> function, which has a filterInnerLoops option)</span><br><br>Then change your definition of profileEntities to:<br><pre class="CodeBlock"><code>        const profileEntities = qOuterSketchRegions(definition.profile);

  
  Example document:
  https://cad.onshape.com/documents/14f1f8d4f2979c9f4e6ffacc/w/1e643421e968f502e2ecf590/e/32fceec70cdf2150e1c75386
  
  

  0