/***************************************************************************
 *   Copyright (c) 2013 Jan Rheinländer <jrheinlaender[at]users.sourceforge.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        *
 *   GNU Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   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_
#include <BRepAdaptor_Curve.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <Precision.hxx>
#include <TopoDS.hxx>
#include <gp_Lin.hxx>
#include <gp_Pln.hxx>
#include <gp_Pnt.hxx>
#endif

#include "FemConstraintTransform.h"

using namespace Fem;

PROPERTY_SOURCE(Fem::ConstraintTransform, Fem::Constraint);

static const char* TransformTypes[] = {"Cylindrical","Rectangular", NULL};

ConstraintTransform::ConstraintTransform()
{
    ADD_PROPERTY(X_rot,(0.0)); //numeric value, 0.0
    ADD_PROPERTY(Y_rot,(0.0));
    ADD_PROPERTY(Z_rot,(0.0));
    ADD_PROPERTY_TYPE(TransformType,(1),"ConstraintTransform",(App::PropertyType)(App::Prop_None),
                      "Type of transform, rectangular or cylindrical");
    TransformType.setEnums(TransformTypes);
    ADD_PROPERTY_TYPE(RefDispl,(0,0),"ConstraintTransform",(App::PropertyType)(App::Prop_None),"Elements where the constraint is applied");
    ADD_PROPERTY_TYPE(NameDispl,(0),"ConstraintTransform",(App::PropertyType)(App::Prop_None),"Elements where the constraint is applied");
    ADD_PROPERTY_TYPE(BasePoint,(Base::Vector3d(0,0,0)),"ConstraintTransform",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
                      "Base point of cylindrical surface");
    ADD_PROPERTY_TYPE(Axis,(Base::Vector3d(0,1,0)),"ConstraintTransform",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
                      "Axis of cylindrical surface");
    ADD_PROPERTY_TYPE(Points,(Base::Vector3d()),"ConstraintTransform",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
                      "Points where symbols are drawn");
    ADD_PROPERTY_TYPE(Normals,(Base::Vector3d()),"ConstraintTransform",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
                                                                             "Normals where symbols are drawn");
    Points.setValues(std::vector<Base::Vector3d>());
    Normals.setValues(std::vector<Base::Vector3d>());
}

App::DocumentObjectExecReturn *ConstraintTransform::execute(void)
{
    return Constraint::execute();
}

const char* ConstraintTransform::getViewProviderName(void) const
{
        return "FemGui::ViewProviderFemConstraintTransform";
}

void ConstraintTransform::onChanged(const App::Property* prop)
{
    Constraint::onChanged(prop);

    if (prop == &References) {
        std::vector<Base::Vector3d> points;
        std::vector<Base::Vector3d> normals;
        int scale = 1; //OvG: Enforce use of scale
        if (getPoints(points, normals, &scale)) {
            Points.setValues(points);
            Normals.setValues(normals);
            Scale.setValue(scale); //OvG: Scale
            Points.touch(); // This triggers ViewProvider::updateData()
            std::string transform_type = TransformType.getValueAsString();
            if (transform_type == "Cylindrical") {
                // Find data of cylinder
                double radius, height;
                Base::Vector3d base, axis;
                if (!getCylinder(radius, height, base, axis))
                   return;
                Axis.setValue(axis);
                // Update base point
                base = base + axis * height/2;
                BasePoint.setValue(base);
                BasePoint.touch(); // This triggers ViewProvider::updateData()
            }
        }
    }
}