From f2ae921768a10cf989b529e44fbc470e3fc2635f Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Wed, 30 May 2018 21:27:49 +0200
Subject: [PATCH] expose function to Python to get optimal bounding box

---
 src/Mod/Part/App/TopoShapePy.xml    |  7 ++++++
 src/Mod/Part/App/TopoShapePyImp.cpp | 38 +++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/src/Mod/Part/App/TopoShapePy.xml b/src/Mod/Part/App/TopoShapePy.xml
index 47bdc8a497..f19b27e773 100644
--- a/src/Mod/Part/App/TopoShapePy.xml
+++ b/src/Mod/Part/App/TopoShapePy.xml
@@ -697,6 +697,13 @@ infos contains additional info on the solutions. It is a list of tuples:
         </UserDocu>
       </Documentation>
     </Methode>
+    <Methode Name="optimalBoundingBox" Const="true">
+      <Documentation>
+        <UserDocu>
+        optimalBoundingBox(useTriangulation = True, useShapeTolerance = False) -> bound box
+        </UserDocu>
+      </Documentation>
+    </Methode>
     <!--
     <Attribute Name="Location" ReadOnly="false">
       <Documentation>
diff --git a/src/Mod/Part/App/TopoShapePyImp.cpp b/src/Mod/Part/App/TopoShapePyImp.cpp
index b040c1acaa..6fd1b6619f 100644
--- a/src/Mod/Part/App/TopoShapePyImp.cpp
+++ b/src/Mod/Part/App/TopoShapePyImp.cpp
@@ -40,6 +40,7 @@
 # include <BRepExtrema_ShapeProximity.hxx>
 #endif
 # include <BRepExtrema_SupportType.hxx>
+# include <BRepBndLib.hxx>
 # include <gp_Ax1.hxx>
 # include <gp_Ax2.hxx>
 # include <gp_Dir.hxx>
@@ -2610,6 +2611,43 @@ PyObject* TopoShapePy::distToShape(PyObject *args)
     return Py_BuildValue("dOO", minDist, solnPts,solnGeom);
 }
 
+PyObject* TopoShapePy::optimalBoundingBox(PyObject *args)
+{
+    PyObject* useT = Py_True;
+    PyObject* useS = Py_False;
+    if (!PyArg_ParseTuple(args, "|O!O!", &PyBool_Type, &PyBool_Type, &useT, &useS))
+        return 0;
+
+    try {
+#if OCC_VERSION_HEX >= 0x070200
+        TopoDS_Shape shape = this->getTopoShapePtr()->getShape();
+        Bnd_Box bounds;
+        BRepBndLib::AddOptimal(shape, bounds,
+                               PyObject_IsTrue(useT) ? Standard_True : Standard_False,
+                               PyObject_IsTrue(useS) ? Standard_True : Standard_False);
+        bounds.SetGap(0.0);
+        Standard_Real xMin, yMin, zMin, xMax, yMax, zMax;
+        bounds.Get(xMin, yMin, zMin, xMax, yMax, zMax);
+
+        Base::BoundBox3d box;
+        box.MinX = xMin;
+        box.MaxX = xMax;
+        box.MinY = yMin;
+        box.MaxY = yMax;
+        box.MinZ = zMin;
+        box.MaxZ = zMax;
+
+        Py::BoundingBox pybox(box);
+        return Py::new_reference_to(pybox);
+#else
+        throw Py::RuntimeError("Need OCCT 7.2.0 or higher");
+#endif
+    }
+    catch (const Standard_Failure& e) {
+        throw Py::RuntimeError(e.GetMessageString());
+    }
+}
+
 // End of Methods, Start of Attributes
 
 #if 0 // see ComplexGeoDataPy::Matrix which does the same