Selectors?

[mattshepcar]

Have you thought about adding selectors like in cadquery? I'm not a huge fan of the syntax they use but the general idea of being able to select faces, edges and vertices without hard coded indices seems good.

OC already provides some useful ways to get edges from certain operations too. e.g. to fillet the top & bottom faces of an extrude you can do this:

const profile = new Sketch([0, 0]).Circle([0, 0], 10).Face();
const prism = new oc.BRepPrimAPI_MakePrism(profile, new oc.gp_Vec(0, 0, 5))
const prismTop = prism.LastShape(profile);
const prismBot = prism.FirstShape(profile);
let mkFillet = new oc.BRepFilletAPI_MakeFillet(prism.Shape());
ForEachEdge(prismTop, (index, edge) => {mkFillet.Add(1, edge);});
ForEachEdge(prismBot, (index, edge) => {mkFillet.Add(2, edge);});
sceneShapes = Remove(sceneShapes, profile);
sceneShapes.push(mkFillet.Shape());

Maybe it would be possible to come up with a neater API like new Extruder(profile,[0,0,5]).Top().Fillet(1).Bottom().Fillet(2).Shape() or something

Other useful ones would be to get the edges from a BRepFeat_MakeDPrism operation or the new edges created by a union/intersect/cut. On that note, how would I go about adding missing opencascade APIs such as BRepFeat_MakeDPrism to cascade studio?