v3.1.0

🚀 Features

• delete() and using now free the C++ object for every class. Previously about 2,100 classes, including gp_*, TopoDS_Shape, every BRep*API builder and the NCollection_* containers, were bound with an empty destructor, so their memory was never released. (#40) (#50, #40)

  Handles returned as raw pointers (for example BRepAlgoAPI_Cut.Builder(), map Seek() results, or ExtremaPC_*.Perform() results) are now borrowed: deleting one releases the JS handle without freeing memory its owner still uses. Previously some of these freed memory the owning object went on to use or free again.

  Upgrade note: since delete() now frees memory, a handle must not be deleted while another OCCT object still uses it, and a handle to an object you deleted must not be used. For example, keep a curve adaptor alive while an Extrema_* object that was built from it is still in use, since the extrema object keeps a reference to the adaptor. Code that called Clear() before delete() as a leak workaround can drop that call.

🩹 Fixes

• Custom builds that leave STACK_SIZE unset now link with an 8 MB stack, matching the published builds, instead of emcc's 64 KB default that deep OCCT recursion overflows silently. The shipped .js.symbols map is now written by the link step's final wasm-opt pass, so its function indices match the .wasm that ships. (#49, #35, #39, #40)
• Make BRepOffset_MakeOffset results independent of heap history (#35, taucad/tau#243) and stop BRepBuilderAPI_NurbsConvert trapping on meshed B-spline faces (#39). Arc-join offset results may list their faces in a different order than earlier releases; the geometry is unchanged. (#48, #35, #243, #39)
• Register std::optional<T> for every optional output parameter and genuine std::optional<T> parameter in the fragment that uses it, so custom builds no longer fail with Cannot construct ... due to unbound types. Additional bind code can now call emsdk's unnamed register_optional<T>() (#39). (#47, #39)

❤️ Thank You

• Claude
• Claude Opus 5.5 (1M context)
• Richard Fontein @rifont