basic infrastructure for part design primitives

src/Mod/PartDesign/App/FeaturePrimitive.cpp

@@ -0,0 +1,159 @@
+/***************************************************************************
+ *   Copyright (c) 2015 Stefan Tröger <stefantroeger@gmx.net>              *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  is distributed in the hope that it will be useful,      *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "PreCompiled.h"
+#ifndef _PreComp_
+#endif
+
+
+#include "FeaturePrimitive.h"
+#include <BRepPrimAPI_MakeBox.hxx>
+#include <BRepBuilderAPI_GTransform.hxx>
+#include <BRepAlgoAPI_Fuse.hxx>
+#include <BRepAlgoAPI_Cut.hxx>
+
+namespace PartDesign {
+
+
+PROPERTY_SOURCE(PartDesign::FeaturePrimitive, PartDesign::FeatureAddSub)
+
+FeaturePrimitive::FeaturePrimitive()
+{
+    ADD_PROPERTY_TYPE(References, (0,0), "Primitive", (App::PropertyType)(App::Prop_None), "References to build the location of the primitive");
+}
+
+App::DocumentObjectExecReturn* FeaturePrimitive::execute(const TopoDS_Shape& primitiveShape)
+{
+    try {
+        //transform the primitive in the correct coordinance
+        BRepBuilderAPI_GTransform mkTrf(primitiveShape, getLocation().Transformation());
+        const TopoDS_Shape primitiveShape = mkTrf.Shape();
+        
+        //if we have no base we just add the standart primitive shape
+        const TopoDS_Shape base = getBaseShape();
+        if(base.IsNull()) {
+             if(getAddSubType() == FeatureAddSub::Additive)
+                 Shape.setValue(primitiveShape);
+             else 
+                 return new App::DocumentObjectExecReturn("Cannot subtract primitive feature without base feature");
+                 
+             AddSubShape.setValue(base);
+             return  App::DocumentObject::StdReturn;
+        }
+         
+        if(getAddSubType() == FeatureAddSub::Additive) {
+            BRepAlgoAPI_Fuse mkFuse(base, primitiveShape);
+            if (!mkFuse.IsDone())
+                return new App::DocumentObjectExecReturn("Adding the primitive failed");
+            // we have to get the solids (fuse sometimes creates compounds)
+            TopoDS_Shape boolOp = this->getSolid(mkFuse.Shape());
+            // lets check if the result is a solid
+            if (boolOp.IsNull())
+                return new App::DocumentObjectExecReturn("Resulting shape is not a solid");
+            
+            Shape.setValue(boolOp);
+            AddSubShape.setValue(primitiveShape);
+        }
+        else if(getAddSubType() == FeatureAddSub::Subtractive) {
+            
+            BRepAlgoAPI_Cut mkCut(base, primitiveShape);
+            if (!mkCut.IsDone())
+                return new App::DocumentObjectExecReturn("Subtracting the primitive failed");
+            // we have to get the solids (fuse sometimes creates compounds)
+            TopoDS_Shape boolOp = this->getSolid(mkCut.Shape());
+            // lets check if the result is a solid
+            if (boolOp.IsNull())
+                return new App::DocumentObjectExecReturn("Resulting shape is not a solid");
+            
+            Shape.setValue(boolOp);
+            AddSubShape.setValue(primitiveShape);
+        }
+        
+        
+    }
+    catch (Standard_Failure) {
+        Handle_Standard_Failure e = Standard_Failure::Caught();
+        return new App::DocumentObjectExecReturn(e->GetMessageString());
+    }
+
+    return App::DocumentObject::StdReturn;
+}
+
+TopLoc_Location FeaturePrimitive::calculateLocation()
+{
+    return TopLoc_Location();
+}
+
+
+
+PROPERTY_SOURCE(PartDesign::Box, PartDesign::FeaturePrimitive)
+
+Box::Box()
+{
+    ADD_PROPERTY_TYPE(Length,(10.0f),"Box",App::Prop_None,"The length of the box");
+    ADD_PROPERTY_TYPE(Width ,(10.0f),"Box",App::Prop_None,"The width of the box");
+    ADD_PROPERTY_TYPE(Height,(10.0f),"Box",App::Prop_None,"The height of the box");
+    
+    primitiveType = FeaturePrimitive::Box;
+}
+
+App::DocumentObjectExecReturn* Box::execute(void)
+{
+    double L = Length.getValue();
+    double W = Width.getValue();
+    double H = Height.getValue();
+
+    if (L < Precision::Confusion())
+        return new App::DocumentObjectExecReturn("Length of box too small");
+
+    if (W < Precision::Confusion())
+        return new App::DocumentObjectExecReturn("Width of box too small");
+
+    if (H < Precision::Confusion())
+        return new App::DocumentObjectExecReturn("Height of box too small");
+
+    try {
+        // Build a box using the dimension attributes
+        BRepPrimAPI_MakeBox mkBox(L, W, H);
+        return FeaturePrimitive::execute(mkBox.Shape());
+    }
+    catch (Standard_Failure) {
+        Handle_Standard_Failure e = Standard_Failure::Caught();
+        return new App::DocumentObjectExecReturn(e->GetMessageString());
+    }
+}
+
+short int Box::mustExecute() const
+{
+     if ( Length.isTouched() ||
+          Height.isTouched() ||
+          Width.isTouched() )
+        return 1;
+     
+    return FeaturePrimitive::mustExecute();
+}
+
+PROPERTY_SOURCE(PartDesign::AdditiveBox, PartDesign::Box)
+PROPERTY_SOURCE(PartDesign::SubtractiveBox, PartDesign::Box)
+
+}