Extruding with an offset on all 4 side

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  RyanAvery Member Posts: 93 EDU

  April 2018

  What about for extruding a set amount on all 4 sides of a box, the full depth of it. 
  I.e. a tool / FS that can do this to any cube that I select after I select the face of it (so it knows to extrude the 4 faces connected to that face) 
  
  

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  RyanAvery Member Posts: 93 EDU

  April 2018

  Is this something I should look into to writing a FS for? Or is that too much time? Would it be best to just stretch the boxes bigger with a copy, then boolean subtract the first from the copy? 

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

  April 2018

  @RyanAvery
  
  If you want to try your hand at FeatureScript, this would be a pretty simple feature to write.  In moderate-pseudocode it breaks down to
  
  

  export const trimmedExtrude = defineFeature(function(context, id, definition)
      precondition
      {
          annotation{...} // <- Filter should probably be EntityType.FACE && GeometryType.PLANE
          definition.profiles is Query;
         
          annotation{...}
          isLength(definition.depth, LENGTH_BOUNDS);
  
          annotation{...}
          isLength(definition.trim, LENGTH_BOUNDS);
      }
      {
          // Find the extrudeDirection
          const dir = evFaceTangentPlane(..., {"face" : qNthElement(definition.profiles, 0)}).normal;
  
          //  Extrude the profiles
          opExtrude(context, id + "extrude", {
                       "entities" : definition.profiles,
                       "direction" : dir,
                       "endDepth" : definition.depth,
                       ...
                  });
  
          // Find the side faces
          const capEntities = qUnion([qCapEntity(id + "extrude", true, EntityType.FACE), qCapEntity(..., false, ...)]);
          const sideFaces = qSubtraction(qCreatedBy(id + "extrude", EntityType.FACE), capEntities);
  
          // Push the side faces in
          opOffsetFace(..., {
                      "moveFaces" : sideFaces,
                      "offsetDistance" : -definition.trim
                  });
      }, {};
  
  

  
  

  Jake Rosenfeld - Modeling Team

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