I use TurboCAD Platinum and SharkCAD Pro, both use ACIS, and both have the branched loft function. You declare the trunk profiles first, then the successive branches, then finish. It's been in TurboCAD and PunchCAD/SharkCAD since 2007 or 2008, and it's trouble-free but not frequently used. Latest versions of TurboCAD and SharkCAD Pro have CATIA, SW, Pro/E_Creo, NX, Inventor, SolidEdge import and others, they're useful as translators too. Autodesk (Fusion, Inventor) bought a permanent ACIS license at ACIS V7 (solids in .dwg are ACIS V7 compatible), then went with their own kernel development. Fusion and Inventor will import ACIS current .sat and .sab binary format files, but they export .sat/sab v7. They also bought T-spline technology, mentioned by that Fusion developer, that was originally available as a plug-in for Rhino and SolidWorks, it works pretty much by making each facet of a mesh a nurbs surface, tangential to its neighbours. It's a reverse engineering methods to get nurbs out of mesh but it doesn't make the model parametric, although I think I remember that it does recognise cylindrical, conical, planar features.
The zip attached is ACIS' branch loft of the internal profiles and outward shelling in TurboCAD.
- fan manifoldACIS.zip
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