+ add method to offset arbitrary shapes

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5005 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d

src/Mod/Part/App/TopoShape.cpp

@@ -56,6 +56,7 @@
 # include <BRepMesh_Triangle.hxx>
 # include <BRepMesh_Edge.hxx>
 # include <BRepOffsetAPI_MakeThickSolid.hxx>
+# include <BRepOffsetAPI_MakeOffsetShape.hxx>
 # include <BRepOffsetAPI_MakePipe.hxx>
 # include <BRepOffsetAPI_MakePipeShell.hxx>
 # include <BRepOffsetAPI_Sewing.hxx>
@@ -1491,6 +1492,16 @@ TopoDS_Shape TopoShape::makeThickSolid(const TopTools_ListOfShape& remFace,
     return mkThick.Shape();
 }
 
+TopoDS_Shape TopoShape::makeOffset(double offset, double tol, bool intersection,
+                                   bool selfInter, short offsetMode, short join)
+{
+    BRepOffsetAPI_MakeOffsetShape mkOffset(this->_Shape, offset, tol, BRepOffset_Mode(offsetMode),
+        intersection ? Standard_True : Standard_False,
+        selfInter ? Standard_True : Standard_False,
+        GeomAbs_JoinType(join));
+    return mkOffset.Shape();
+}
+
 void TopoShape::transformGeometry(const Base::Matrix4D &rclMat)
 {
     this->_Shape = transformGShape(rclMat);

src/Mod/Part/App/TopoShape.h

@@ -199,6 +199,9 @@ public:
     TopoDS_Shape makeTube(double radius, double tol) const;
     TopoDS_Shape makeTube() const;
     TopoDS_Shape makeLoft(const TopTools_ListOfShape& profiles, Standard_Boolean isSolid, Standard_Boolean isRuled) const;
+    TopoDS_Shape makeOffset(double offset, double tol,
+        bool intersection = false, bool selfInter = false,
+        short offsetMode = 0, short join = 0);
     //@}
 
     /** @name Manipulation*/

src/Mod/Part/App/TopoShapePy.xml

@@ -179,6 +179,11 @@ which are to be removed. The remaining faces of the solid become the walls of
 the hollowed solid, their thickness defined at the time of construction.</UserDocu>
       </Documentation>
     </Methode>
+    <Methode Name="makeOffsetShape">
+      <Documentation> 
+        <UserDocu>Offset a given shape</UserDocu>
+      </Documentation>
+    </Methode>
     <Methode Name="reverse">
       <Documentation>
         <UserDocu>Reverses the orientation of this shape.</UserDocu>

src/Mod/Part/App/TopoShapePyImp.cpp

@@ -965,6 +965,31 @@ PyObject* TopoShapePy::makeThickness(PyObject *args)
     }
 }
 
+PyObject* TopoShapePy::makeOffsetShape(PyObject *args)
+{
+    double offset, tolerance;
+    PyObject* inter = Py_False;
+    PyObject* self_inter = Py_False;
+    short offsetMode = 0, join = 0;
+    if (!PyArg_ParseTuple(args, "dd|O!O!hh",
+        &offset, &tolerance,
+        &(PyBool_Type), &inter,
+        &(PyBool_Type), &self_inter,
+        &offsetMode, &join))
+        return 0;
+
+    try {
+        TopoDS_Shape shape = this->getTopoShapePtr()->makeOffset(offset, tolerance,
+            (inter == Py_True), (self_inter == Py_True), offsetMode, join);
+        return new TopoShapePy(new TopoShape(shape));
+    }
+    catch (Standard_Failure) {
+        Handle_Standard_Failure e = Standard_Failure::Caught();
+        PyErr_SetString(PyExc_Exception, e->GetMessageString());
+        return NULL;
+    }
+}
+
 PyObject*  TopoShapePy::reverse(PyObject *args)
 {
     if (!PyArg_ParseTuple(args, ""))