ViewProviderCurvature.cpp

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/***************************************************************************
 *   Copyright (c) 2004 Werner Mayer <wmayer[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        *
 *   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_
# include <Inventor/SoPickedPoint.h>
# include <Inventor/details/SoFaceDetail.h>
# include <Inventor/details/SoPointDetail.h>
# include <Inventor/events/SoMouseButtonEvent.h>
# include <Inventor/events/SoKeyboardEvent.h>
# include <Inventor/events/SoLocation2Event.h>
# include <Inventor/nodes/SoDrawStyle.h>
# include <Inventor/nodes/SoIndexedFaceSet.h>
# include <Inventor/nodes/SoMaterial.h>
# include <Inventor/nodes/SoMaterialBinding.h>
# include <Inventor/nodes/SoShapeHints.h>
# include <Inventor/sensors/SoIdleSensor.h>
# include <algorithm>
# include <sstream>
# include <QEvent>
# include <QMenu>
# include <QMessageBox>
# include <QCursor>
# include <QToolTip>
# include <QWhatsThis>
#endif

# include <iomanip>
# include <ios>

// Here the FreeCAD includes sorted by Base,App,Gui......
#include <Base/Console.h>
#include <Base/Parameter.h>
#include <Base/Exception.h>
#include <Base/Sequencer.h>
#include <App/Annotation.h>
#include <App/Application.h>
#include <App/Document.h>
#include <App/DocumentObjectGroup.h>
#include <Gui/Application.h>
#include <Gui/Document.h>
#include <Gui/MainWindow.h>
#include <Gui/Selection.h>
#include <Gui/SoFCSelection.h>
#include <Gui/SoFCColorBar.h>
#include <Gui/View3DInventorViewer.h>
#include <Gui/ViewProviderGeometryObject.h>
#include <Gui/Widgets.h>

#include <Mod/Mesh/App/MeshProperties.h>
#include <Mod/Mesh/App/MeshFeature.h>
#include <Mod/Mesh/App/FeatureMeshCurvature.h>
#include <Mod/Mesh/App/MeshProperties.h>

#include "ViewProvider.h"
#include "ViewProviderCurvature.h"

using namespace Mesh;
using namespace MeshGui;
using namespace std;

bool ViewProviderMeshCurvature::addflag = false;

PROPERTY_SOURCE(MeshGui::ViewProviderMeshCurvature, Gui::ViewProviderDocumentObject)

ViewProviderMeshCurvature::ViewProviderMeshCurvature()
{
    pcColorRoot = new SoSeparator();
    pcColorRoot->ref();
    pcColorMat = new SoMaterial;
    pcColorMat->ref();
    pcColorStyle = new SoDrawStyle(); 
    pcColorRoot->addChild(pcColorStyle);
    // simple color bar
    pcColorBar = new Gui::SoFCColorBar;
    pcColorBar->Attach(this);
    pcColorBar->ref();
    pcColorBar->setRange(-0.5f, 0.5f, 3);
    pcLinkRoot = new SoGroup;
    pcLinkRoot->ref();

    App::Material mat;
    const SbColor* cols;
    if (pcColorMat->ambientColor.getNum() == 1) {
        cols = pcColorMat->ambientColor.getValues(0);
        mat.ambientColor.setPackedValue(cols[0].getPackedValue());
    }
    if (pcColorMat->diffuseColor.getNum() == 1) {
        cols = pcColorMat->diffuseColor.getValues(0);
        mat.diffuseColor.setPackedValue(cols[0].getPackedValue());
    }
    if (pcColorMat->emissiveColor.getNum() == 1) {
        cols = pcColorMat->emissiveColor.getValues(0);
        mat.emissiveColor.setPackedValue(cols[0].getPackedValue());
    }
    if (pcColorMat->specularColor.getNum() == 1) {
        cols = pcColorMat->specularColor.getValues(0);
        mat.specularColor.setPackedValue(cols[0].getPackedValue());
    }
    if (pcColorMat->shininess.getNum() == 1) {
        const float* shiny = pcColorMat->shininess.getValues(0);
        mat.shininess = shiny[0];
    }
    if (pcColorMat->transparency.getNum() == 1) {
        const float* trans = pcColorMat->transparency.getValues(0);
        mat.transparency = trans[0];
    }

    ADD_PROPERTY(TextureMaterial,(mat));
}

ViewProviderMeshCurvature::~ViewProviderMeshCurvature()
{
    pcColorRoot->unref();
    pcColorMat->unref();
    pcColorBar->Detach(this);
    pcColorBar->unref();
    pcLinkRoot->unref();
}

void ViewProviderMeshCurvature::onChanged(const App::Property* prop)
{
    if (prop == &TextureMaterial) {
        const App::Material& Mat = TextureMaterial.getValue();
        pcColorMat->ambientColor.setValue(Mat.ambientColor.r,Mat.ambientColor.g,Mat.ambientColor.b);
        pcColorMat->specularColor.setValue(Mat.specularColor.r,Mat.specularColor.g,Mat.specularColor.b);
        pcColorMat->emissiveColor.setValue(Mat.emissiveColor.r,Mat.emissiveColor.g,Mat.emissiveColor.b);
        pcColorMat->shininess.setValue(Mat.shininess);
        pcColorMat->transparency.setValue(Mat.transparency);
    }

    ViewProviderDocumentObject::onChanged(prop);
}

void ViewProviderMeshCurvature::hide(void)
{
    inherited::hide();
    pcColorStyle->style = SoDrawStyle::INVISIBLE;
}

void ViewProviderMeshCurvature::show(void)
{
    inherited::show();
    pcColorStyle->style = SoDrawStyle::FILLED;
}

void ViewProviderMeshCurvature::init(const Mesh::PropertyCurvatureList* pCurvInfo)
{
    std::vector<float> aMinValues, aMaxValues;
    const std::vector<Mesh::CurvatureInfo>& fCurvInfo = pCurvInfo->getValues();
    aMinValues.reserve(fCurvInfo.size());
    aMaxValues.reserve(fCurvInfo.size());

    for ( std::vector<Mesh::CurvatureInfo>::const_iterator jt=fCurvInfo.begin();jt!=fCurvInfo.end(); ++jt ) {
        aMinValues.push_back( jt->fMinCurvature );
        aMaxValues.push_back( jt->fMaxCurvature );
    }

    if ( aMinValues.empty() || aMaxValues.empty() ) 
        return; // no values inside

    float fMin = *std::min_element( aMinValues.begin(), aMinValues.end() );
    float fMax = *std::max_element( aMinValues.begin(), aMinValues.end() );

    // histogram over all values
    std::map<int, int> aHistogram;
    for ( std::vector<float>::const_iterator kt = aMinValues.begin(); kt != aMinValues.end(); ++kt ) {
        int grp = (int)(10.0f*( *kt - fMin )/( fMax - fMin ));
        aHistogram[grp]++;
    }

    float fRMin=-1.0f;
    for ( std::map<int, int>::iterator mIt = aHistogram.begin(); mIt != aHistogram.end(); ++mIt ) {
        if ( (float)mIt->second / (float)aMinValues.size() > 0.15f ) {
            fRMin = mIt->first * ( fMax - fMin )/10.0f + fMin;
            break;
        }
    }

    fMin = *std::min_element( aMaxValues.begin(), aMaxValues.end() );
    fMax = *std::max_element( aMaxValues.begin(), aMaxValues.end() );

    // histogram over all values
    aHistogram.clear();
    for ( std::vector<float>::const_iterator it2 = aMaxValues.begin(); it2 != aMaxValues.end(); ++it2 ) {
        int grp = (int)(10.0f*( *it2 - fMin )/( fMax - fMin ));
        aHistogram[grp]++;
    }

    float fRMax=1.0f;
    for ( std::map<int, int>::reverse_iterator rIt2 = aHistogram.rbegin(); rIt2 != aHistogram.rend(); ++rIt2 ) {
        if ( (float)rIt2->second / (float)aMaxValues.size() > 0.15f ) {
            fRMax = rIt2->first * ( fMax - fMin )/10.0f + fMin;
            break;
        }
    }

    float fAbs = std::max<float>(fabs(fRMin), fabs(fRMax));
    fRMin = -fAbs;
    fRMax =  fAbs;
    fMin = fRMin; fMax = fRMax;
    pcColorBar->setRange( fMin, fMax, 3 );
}

void ViewProviderMeshCurvature::slotCreatedObject(const App::DocumentObject& Obj)
{
}

void ViewProviderMeshCurvature::slotDeletedObject(const App::DocumentObject& Obj)
{
}

void ViewProviderMeshCurvature::slotChangedObject(const App::DocumentObject& Obj, const App::Property& Prop)
{
    // we get this for any object for that a property has changed. Thus, we must regard that object
    // which is linked by our link property
    App::DocumentObject* object = static_cast<Mesh::Curvature*>(pcObject)->Source.getValue();
    if (object == &Obj) {
        const Mesh::PropertyMeshKernel& mesh = static_cast<Mesh::Feature*>(object)->Mesh;
        if ((&mesh) == (&Prop)) {
            const Mesh::MeshObject& kernel = mesh.getValue();
            pcColorMat->diffuseColor.setNum((int)kernel.countPoints());
            pcColorMat->transparency.setNum((int)kernel.countPoints());
            static_cast<Mesh::Curvature*>(pcObject)->Source.touch(); // make sure to recompute the feature
        }
    }
}

void ViewProviderMeshCurvature::slotCreatedDocument(const App::Document& Doc)
{
}

void ViewProviderMeshCurvature::slotDeletedDocument(const App::Document& Doc)
{
}

void ViewProviderMeshCurvature::attach(App::DocumentObject *pcFeat)
{
    // creats the standard viewing modes
    inherited::attach(pcFeat);
    attachDocument(pcFeat->getDocument());

    SoShapeHints * flathints = new SoShapeHints;
    flathints->vertexOrdering = SoShapeHints::COUNTERCLOCKWISE ;
    flathints->shapeType = SoShapeHints::UNKNOWN_SHAPE_TYPE;

    SoGroup* pcColorShadedRoot = new SoGroup();
    pcColorShadedRoot->addChild(flathints);

    // color shaded
    SoDrawStyle *pcFlatStyle = new SoDrawStyle();
    pcFlatStyle->style = SoDrawStyle::FILLED;
    pcColorShadedRoot->addChild(pcFlatStyle);

    SoMaterialBinding* pcMatBinding = new SoMaterialBinding;
    pcMatBinding->value = SoMaterialBinding::PER_VERTEX_INDEXED;
    pcColorShadedRoot->addChild(pcColorMat);
    pcColorShadedRoot->addChild(pcMatBinding);
    pcColorShadedRoot->addChild(pcLinkRoot);

    addDisplayMaskMode(pcColorShadedRoot, "ColorShaded");

    // Check for an already existing color bar
    Gui::SoFCColorBar* pcBar = ((Gui::SoFCColorBar*)findFrontRootOfType( Gui::SoFCColorBar::getClassTypeId() ));
    if ( pcBar ) {
        float fMin = pcColorBar->getMinValue();
        float fMax = pcColorBar->getMaxValue();

        // Attach to the foreign color bar and delete our own bar
        pcBar->Attach(this);
        pcBar->ref();
        pcBar->setRange(fMin, fMax, 3);
        pcBar->Notify(0);
        pcColorBar->Detach(this);
        pcColorBar->unref();
        pcColorBar = pcBar;
    }

    pcColorRoot->addChild(pcColorBar);
}

void ViewProviderMeshCurvature::updateData(const App::Property* prop)
{
    // set to the expected size
    if (prop->getTypeId() == App::PropertyLink::getClassTypeId()) {
        Mesh::Feature* object = static_cast<const App::PropertyLink*>(prop)->getValue<Mesh::Feature*>();
        this->pcLinkRoot->removeAllChildren();
        if (object) {
            const Mesh::MeshObject& kernel = object->Mesh.getValue();
            pcColorMat->diffuseColor.setNum((int)kernel.countPoints());
            pcColorMat->transparency.setNum((int)kernel.countPoints());

            // get the view provider of the associated mesh feature
            App::Document* rDoc = pcObject->getDocument();
            Gui::Document* pDoc = Gui::Application::Instance->getDocument(rDoc);
            Gui::ViewProviderGeometryObject* view = static_cast<Gui::ViewProviderGeometryObject*>(pDoc->getViewProvider(object));
            this->pcLinkRoot->addChild(view->getHighlightNode());
        }
    }
    else if (prop->getTypeId() == Mesh::PropertyCurvatureList::getClassTypeId()) {
        const Mesh::PropertyCurvatureList* curv = static_cast<const Mesh::PropertyCurvatureList*>(prop);
        if (curv->getSize() < 3) return; // invalid array
#if 0 // FIXME: Do not always change the range
        init(curv); // init color bar
#endif
        setActiveMode();
    }
}

SoSeparator* ViewProviderMeshCurvature::getFrontRoot(void) const
{
    return pcColorRoot;
}

void ViewProviderMeshCurvature::setVertexCurvatureMode(int mode)
{
    Mesh::PropertyCurvatureList* pCurvInfo=0;
    std::map<std::string,App::Property*> Map;
    pcObject->getPropertyMap(Map);
    for( std::map<std::string,App::Property*>::iterator it = Map.begin(); it != Map.end(); ++it ) {
        Base::Type t = it->second->getTypeId();
        if ( t==Mesh::PropertyCurvatureList::getClassTypeId() ) {
            pCurvInfo = (Mesh::PropertyCurvatureList*)it->second;
            break;
        }
    }

    if ( !pCurvInfo )
        return; // cannot display this feature type due to missing curvature property

    // curvature values
    std::vector<float> fValues = pCurvInfo->getCurvature( mode ); 
    unsigned long j=0;
    for ( std::vector<float>::const_iterator jt = fValues.begin(); jt != fValues.end(); ++jt, j++ ) {
        App::Color col = pcColorBar->getColor( *jt );
        pcColorMat->diffuseColor.set1Value(j, SbColor(col.r, col.g, col.b));
        if ( pcColorBar->isVisible( *jt ) ) {
            pcColorMat->transparency.set1Value(j, 0.0f);
        } else {
            pcColorMat->transparency.set1Value(j, 0.8f);
        }
    }
}

QIcon ViewProviderMeshCurvature::getIcon() const
{
    static const char * Mesh_Feature_xpm[] = {
        "16 16 7 1",
        ".      c None",
        "#      c #000000",
        "s      c #BEC2FC",
        "g      c #00FF00",
        "y      c #FFFF00",
        "b      c #0000FF",
        "r      c #FF0000",
        ".......##.......",
        "....#######.....",
        "..##ggg#yyy#....",
        "##ggggg#yyyy##..",
        "#b#ggg#yyyyyy##.",
        "#bb#gg#yyyy###s.",
        "#bb#gg#yy##yy#s.",
        "#bbb#####rrr#ss.",
        "#bbbb##rrrr#ss..",
        ".#b##b#rrrr#s...",
        ".##bbb#rrr#ss...",
        ".##bbb#r#ss.....",
        "..s#####r#s.....",
        "....sss##ss.....",
        "........ss......",
        "................"};
    QPixmap px(Mesh_Feature_xpm);
    return px;
}

void ViewProviderMeshCurvature::setDisplayMode(const char* ModeName)
{
    if ( strcmp("Mean curvature",ModeName)==0 ) {
        setVertexCurvatureMode(Mesh::PropertyCurvatureList::MeanCurvature);
        setDisplayMaskMode("ColorShaded");
    }
    else if ( strcmp("Gaussian curvature",ModeName)==0  ) {
        setVertexCurvatureMode(Mesh::PropertyCurvatureList::GaussCurvature);
        setDisplayMaskMode("ColorShaded");
    }
    else if ( strcmp("Maximum curvature",ModeName)==0  ) {
        setVertexCurvatureMode(Mesh::PropertyCurvatureList::MaxCurvature);
        setDisplayMaskMode("ColorShaded");
    }
    else if ( strcmp("Minimum curvature",ModeName)==0  ) {
        setVertexCurvatureMode(Mesh::PropertyCurvatureList::MinCurvature);
        setDisplayMaskMode("ColorShaded");
    }
    else if ( strcmp("Absolute curvature",ModeName)==0  ) {
        setVertexCurvatureMode(Mesh::PropertyCurvatureList::AbsCurvature);
        setDisplayMaskMode("ColorShaded");
    }

    inherited::setDisplayMode(ModeName);
}

const char* ViewProviderMeshCurvature::getDefaultDisplayMode() const
{
    return "Absolute curvature";
}

std::vector<std::string> ViewProviderMeshCurvature::getDisplayModes(void) const
{
    std::vector<std::string> StrList = inherited::getDisplayModes();

    // add modes
    StrList.push_back("Absolute curvature");
    StrList.push_back("Mean curvature");
    StrList.push_back("Gaussian curvature");
    StrList.push_back("Maximum curvature");
    StrList.push_back("Minimum curvature");

    return StrList;
}

void ViewProviderMeshCurvature::OnChange(Base::Subject<int> &rCaller,int rcReason)
{
    setActiveMode();
}

namespace MeshGui {

class Annotation
{
public:
    Annotation(Gui::ViewProviderDocumentObject* vp,
        const QString& s,const SbVec3f& p, const SbVec3f& n)
        : vp(vp), s(s), p(p), n(n)
    {
    }
    ~Annotation()
    {
    }

    static void run(void * data, SoSensor * sensor)
    {
        Annotation* self = reinterpret_cast<Annotation*>(data);
        self->show();
        delete self;
        delete sensor;
    }

    void show()
    {
        App::Document* doc = vp->getObject()->getDocument();

        std::vector<App::DocumentObject*> groups = doc->getObjectsOfType
            (App::DocumentObjectGroup::getClassTypeId());
        App::DocumentObjectGroup* group = 0;
        std::string internalname = "CurvatureGroup";
        for (std::vector<App::DocumentObject*>::iterator it = groups.begin(); it != groups.end(); ++it) {
            if (internalname == (*it)->getNameInDocument()) {
                group = static_cast<App::DocumentObjectGroup*>(*it);
                break;
            }
        }
        if (!group) {
            group = static_cast<App::DocumentObjectGroup*>(doc->addObject
                ("App::DocumentObjectGroup",internalname.c_str()));
        }

        App::AnnotationLabel* anno = static_cast<App::AnnotationLabel*>
            (group->addObject("App::AnnotationLabel", internalname.c_str()));
        QStringList lines = s.split(QLatin1String("\n"));
        std::vector<std::string> text;
        for (QStringList::Iterator it = lines.begin(); it != lines.end(); ++it)
            text.push_back((const char*)it->toAscii());
        anno->LabelText.setValues(text);
        std::stringstream str;
        str << "Curvature info (" << group->Group.getSize() << ")";
        anno->Label.setValue(str.str());
        anno->BasePosition.setValue(p[0],p[1],p[2]);
        anno->TextPosition.setValue(n[0],n[1],n[2]);
    }

private:
    Gui::ViewProviderDocumentObject* vp;
    QString s;
    SbVec3f p;
    SbVec3f n;
};

}

void ViewProviderMeshCurvature::curvatureInfoCallback(void * ud, SoEventCallback * n)
{
    Gui::View3DInventorViewer* view  = reinterpret_cast<Gui::View3DInventorViewer*>(n->getUserData());
    const SoEvent* ev = n->getEvent();
    if (ev->getTypeId() == SoMouseButtonEvent::getClassTypeId()) {
        const SoMouseButtonEvent * mbe = static_cast<const SoMouseButtonEvent *>(ev);

        // Mark all incoming mouse button events as handled, especially, to deactivate the selection node
        n->getAction()->setHandled();
        if (mbe->getButton() == SoMouseButtonEvent::BUTTON2 && mbe->getState() == SoButtonEvent::UP) {
            n->setHandled();
            // context-menu
            QMenu menu;
            QAction* fl = menu.addAction(QObject::tr("Annotation"));
            fl->setCheckable(true);
            fl->setChecked(addflag);
            QAction* cl = menu.addAction(QObject::tr("Leave info mode"));
            QAction* id = menu.exec(QCursor::pos());
            if (fl == id) {
                addflag = fl->isChecked();
            }
            else if (cl == id) {
                view->setEditing(false);
                view->getWidget()->setCursor(QCursor(Qt::ArrowCursor));
                view->setRedirectToSceneGraph(false);
                view->removeEventCallback(SoEvent::getClassTypeId(), curvatureInfoCallback);
            }
        }
        else if (mbe->getButton() == SoMouseButtonEvent::BUTTON1 && mbe->getState() == SoButtonEvent::UP) {
            const SoPickedPoint * point = n->getPickedPoint();
            if (point == NULL) {
                Base::Console().Message("No facet picked.\n");
                return;
            }

            n->setHandled();

            // By specifying the indexed mesh node 'pcFaceSet' we make sure that the picked point is
            // really from the mesh we render and not from any other geometry
            Gui::ViewProvider* vp = static_cast<Gui::ViewProvider*>(view->getViewProviderByPath(point->getPath()));
            if (!vp || !vp->getTypeId().isDerivedFrom(ViewProviderMeshCurvature::getClassTypeId()))
                return;
            ViewProviderMeshCurvature* self = static_cast<ViewProviderMeshCurvature*>(vp);
            const SoDetail* detail = point->getDetail(point->getPath()->getTail());
            if (detail && detail->getTypeId() == SoFaceDetail::getClassTypeId()) {
                // safe downward cast, know the type
                SoFaceDetail * facedetail = (SoFaceDetail *)detail;
                // get the curvature info of the three points of the picked facet
                int index1 = facedetail->getPoint(0)->getCoordinateIndex();
                int index2 = facedetail->getPoint(1)->getCoordinateIndex();
                int index3 = facedetail->getPoint(2)->getCoordinateIndex();
                std::string info = self->curvatureInfo(true, index1, index2, index3);
                QString text = QString::fromAscii(info.c_str());
                if (addflag) {
                    SbVec3f pt = point->getPoint();
                    SbVec3f nl = point->getNormal();
                    Annotation* anno = new Annotation(self, text, pt, nl);
                    SoIdleSensor* sensor = new SoIdleSensor(Annotation::run, anno);
                    sensor->schedule();
                }
                else {
                    Gui::ToolTip::showText(QCursor::pos(), text);
                }
            }
        }
    }
    else if (ev->getTypeId().isDerivedFrom(SoLocation2Event::getClassTypeId())) {
        const SoPickedPoint * point = n->getPickedPoint();
        if (point == NULL)
            return;
        n->setHandled();

        // By specifying the indexed mesh node 'pcFaceSet' we make sure that the picked point is
        // really from the mesh we render and not from any other geometry
        Gui::ViewProvider* vp = static_cast<Gui::ViewProvider*>(view->getViewProviderByPath(point->getPath()));
        if (!vp || !vp->getTypeId().isDerivedFrom(ViewProviderMeshCurvature::getClassTypeId()))
            return;
        ViewProviderMeshCurvature* that = static_cast<ViewProviderMeshCurvature*>(vp);
        const SoDetail* detail = point->getDetail(point->getPath()->getTail());
        if (detail && detail->getTypeId() == SoFaceDetail::getClassTypeId()) {
            // safe downward cast, know the type
            SoFaceDetail * facedetail = (SoFaceDetail *)detail;
            // get the curvature info of the three points of the picked facet
            int index1 = facedetail->getPoint(0)->getCoordinateIndex();
            int index2 = facedetail->getPoint(1)->getCoordinateIndex();
            int index3 = facedetail->getPoint(2)->getCoordinateIndex();
            std::string info = that->curvatureInfo(false, index1, index2, index3);
            Gui::getMainWindow()->setPaneText(1,QString::fromAscii(info.c_str()));
        }
    }
}

std::string ViewProviderMeshCurvature::curvatureInfo(bool detail, int index1, int index2, int index3) const
{
    // get the curvature info of the three points of the picked facet
    App::Property* prop = pcObject->getPropertyByName("CurvInfo");
    std::stringstream str;
    if (prop && prop->getTypeId() == Mesh::PropertyCurvatureList::getClassTypeId()) {
        Mesh::PropertyCurvatureList* curv = (Mesh::PropertyCurvatureList*)prop;
        const Mesh::CurvatureInfo& cVal1 = (*curv)[index1];
        const Mesh::CurvatureInfo& cVal2 = (*curv)[index2];
        const Mesh::CurvatureInfo& cVal3 = (*curv)[index3];
        float fVal1 = 0.0f; float fVal2 = 0.0f; float fVal3 = 0.0f;

        bool print=true;
        std::string mode = getActiveDisplayMode();
        if (mode == "Minimum curvature") {
            fVal1 = cVal1.fMinCurvature;
            fVal2 = cVal1.fMinCurvature;
            fVal3 = cVal1.fMinCurvature;
        }
        else if (mode == "Maximum curvature") {
            fVal1 = cVal1.fMaxCurvature;
            fVal2 = cVal1.fMaxCurvature;
            fVal3 = cVal1.fMaxCurvature;
        }
        else if (mode == "Gaussian curvature") {
            fVal1 = cVal1.fMaxCurvature*cVal1.fMinCurvature;
            fVal2 = cVal1.fMaxCurvature*cVal2.fMinCurvature;
            fVal3 = cVal1.fMaxCurvature*cVal3.fMinCurvature;
        }
        else if (mode == "Mean curvature") {
            fVal1 = 0.5f*(cVal1.fMaxCurvature+cVal1.fMinCurvature);
            fVal2 = 0.5f*(cVal1.fMaxCurvature+cVal2.fMinCurvature);
            fVal3 = 0.5f*(cVal1.fMaxCurvature+cVal3.fMinCurvature);
        }
        else if (mode == "Absolute curvature") {
            fVal1 = fabs(cVal1.fMaxCurvature) > fabs(cVal1.fMinCurvature) ? cVal1.fMaxCurvature : cVal1.fMinCurvature;
            fVal2 = fabs(cVal2.fMaxCurvature) > fabs(cVal2.fMinCurvature) ? cVal2.fMaxCurvature : cVal2.fMinCurvature;
            fVal3 = fabs(cVal3.fMaxCurvature) > fabs(cVal3.fMinCurvature) ? cVal3.fMaxCurvature : cVal3.fMinCurvature;
        }
        else {
            print = false;
        }

        if (print) {
            if (!detail) {
                str << mode << ": <" << fVal1 << ", " << fVal2 << ", " << fVal3 << ">";
            }
            else {
                str.setf(std::ios::fixed | std::ios::showpoint);
                str.precision(5);
                str << mode << std::endl
                    << "v1: " << std::setw(5) << fVal1 << std::endl
                    << "v2: " << std::setw(5) << fVal2 << std::endl
                    << "v3: " << std::setw(5) << fVal3;
            }
        }
        else if (!detail) {
            str << "No curvature mode set";
        }
    }

    return str.str();
}