opExtractSurface using derived feature

papawo

Jake_Rosenfeld

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

papawo

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

kevin_o_toole_1

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