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Design: STEP export of the CAD model

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Add an "Export STEP…" button to the Design panel that writes every body to a
.step file as native B-rep (not mesh).

- CadDocument::export_step: compound all bodies (applying their per-body Move
  display transform so the STEP matches what Commit ships) and write via OCCT
  STEPControl_Writer (AsIs). Full error handling incl. OCCT Standard_Failure.
- DesignPanel::on_export_step: bake any open preview, wxFileDialog save, export
  at the displayed body positions, status feedback.

Kernel write path verified with a standalone OCCT box->STEP->readback check
(1 solid, non-null) against the same OCCT build.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
This commit is contained in:
Tommaso Bianchi
2026-06-30 08:21:03 +02:00
co-authored by Claude Opus 4.8
parent 30713f0f23
commit aa2907f730
4 changed files with 85 additions and 1 deletions
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src/slic3r/GUI/DesignPanel.cpp
+30 -1
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@@ -1514,7 +1514,11 @@ DesignPanel::DesignPanel(wxWindow* parent)
auto* commit = new wxButton(m_form, wxID_ANY, _L("Commit to Plate"));
commit->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { on_commit(); });
root->Add(commit, 0, wxALL, 12);
root->Add(commit, 0, wxLEFT | wxRIGHT | wxTOP, 12);
auto* export_step = new wxButton(m_form, wxID_ANY, _L("Export STEP…"));
export_step->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { on_export_step(); });
root->Add(export_step, 0, wxALL, 12);
m_shape->Bind(wxEVT_CHOICE, [this](wxCommandEvent& e) { on_shape_changed(); e.Skip(); });
on_shape_changed();
@@ -4766,6 +4770,31 @@ void DesignPanel::on_edit_feature()
}
}
void DesignPanel::on_export_step()
{
// Bake any open feature preview first, so the STEP matches what is shown (mirrors on_commit).
if (m_active != Tool::None)
confirm_tool();
if (m_doc.bodies.empty()) {
m_status->SetForegroundColour(wxNullColour);
m_status->SetLabel(_L("Nothing to export — add a feature first"));
m_status->Refresh();
return;
}
wxFileDialog dlg(this, _L("Export STEP"), wxEmptyString, "model.step",
"STEP files (*.step;*.stp)|*.step;*.stp",
wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
if (dlg.ShowModal() != wxID_OK)
return;
sync_body_xform(); // export bodies at their displayed Move-gizmo positions
std::string err;
const bool ok = m_doc.export_step(dlg.GetPath().ToUTF8().data(), m_body_xform, err);
m_status->SetForegroundColour(ok ? wxColour(120, 210, 120) : wxColour(235, 110, 110));
m_status->SetLabel(ok ? _L("Exported STEP")
: _L("STEP export failed: ") + wxString::FromUTF8(err));
m_status->Refresh();
}
void DesignPanel::on_commit()
{
// A feature tool open with a live preview ghost (e.g. a fillet being previewed) is