MeshRepairPlugin.cc 36.5 KB
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/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
*      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen       *
*                           www.openflipper.org                              *
*                                                                            *
*--------------------------------------------------------------------------- *
*  This file is part of OpenFlipper.                                         *
*                                                                            *
*  OpenFlipper is free software: you can redistribute it and/or modify       *
*  it under the terms of the GNU Lesser General Public License as            *
*  published by the Free Software Foundation, either version 3 of            *
*  the License, or (at your option) any later version with the               *
*  following exceptions:                                                     *
*                                                                            *
*  If other files instantiate templates or use macros                        *
*  or inline functions from this file, or you compile this file and          *
*  link it with other files to produce an executable, this file does         *
*  not by itself cause the resulting executable to be covered by the         *
*  GNU Lesser General Public License. This exception does not however        *
*  invalidate any other reasons why the executable file might be             *
*  covered by the GNU Lesser General Public License.                         *
*                                                                            *
*  OpenFlipper 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 Lesser General Public License for more details.                       *
*                                                                            *
*  You should have received a copy of the GNU LesserGeneral Public           *
*  License along with OpenFlipper. If not,                                   *
*  see <http://www.gnu.org/licenses/>.                                       *
*                                                                            *
\*===========================================================================*/

/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
\*===========================================================================*/

#include <QtGui>

#include "MeshRepairPlugin.hh"

#include <iostream>

#include <OpenFlipper/BasePlugin/PluginFunctions.hh>
#include "OpenFlipper/INIFile/INIFile.hh"

#include <MeshTools/MeshSelectionT.hh>
#include <ACG/Geometry/Algorithms.hh>
#include <Math_Tools/Math_Tools.hh>

//-----------------------------------------------------------------------------

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MeshRepairPlugin::MeshRepairPlugin() :
tool_(0),
toolIcon_(0)
{

}
//-----------------------------------------------------------------------------

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void
MeshRepairPlugin::
initializePlugin()
{
  tool_ = new MeshRepairToolbarWidget();
  QSize size(300, 300);
  tool_->resize(size);
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  // Vertex Selection/Removal
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  connect(tool_->valenceThreeButton, SIGNAL(clicked()), this, SLOT(slotDetectFlatValence3Vertices()) );
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  connect(tool_->repairRemoveVButton, SIGNAL(clicked()), this, SLOT(slotRemoveSelectedVal3Vertices()) );

  // Edge Selection/Repairing
  connect(tool_->detectEShorterButton, SIGNAL(clicked()), this, SLOT(slotDetectEdgesShorter()) );
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  connect(tool_->detectELargerButton, SIGNAL(clicked()), this, SLOT(slotDetectEdgesLonger()) );
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  connect(tool_->repairCollapseEButton, SIGNAL(clicked()), this, SLOT(slotRemoveSelectedEdges()) );
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  connect(tool_->detectCapAngle, SIGNAL(clicked()), this, SLOT(slotDetectSkinnyTriangleByAngle()) );
  connect(tool_->repairFlipEButton, SIGNAL(clicked()), this, SLOT(slotRemoveSkinnyTriangleByAngle()) );
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  connect(tool_->detectFoldoverButton, SIGNAL(clicked()), this, SLOT(slotDetectFoldover()) );
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  //Face operations
  connect(tool_->triangleAspectButton,SIGNAL(clicked()),this,SLOT(slotDetectTriangleAspect()));
  connect(tool_->flipOrientation,SIGNAL(clicked()),this,SLOT(slotFlipOrientation()));

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  //Normal operations
  connect(tool_->computeNormals,SIGNAL(clicked()),this,SLOT(slotUpdateNormals()));
  connect(tool_->computeVertexNormals,SIGNAL(clicked()),this,SLOT(slotUpdateVertexNormals()));
  connect(tool_->computeFaceNormals,SIGNAL(clicked()),this,SLOT(slotUpdateFaceNormals()));
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  connect(tool_->computeHalfedgeNormals,SIGNAL(clicked()),this,SLOT(slotUpdateHalfedgeNormals()));
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  toolIcon_ = new QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"meshrepair-toolbox.png");
  tool_->repairCollapseEButton->setIcon(*toolIcon_);
  tool_->repairFlipEButton->setIcon(*toolIcon_);
  tool_->repairRemoveVButton->setIcon(*toolIcon_);
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  emit addToolbox( tr("Mesh Repair") , tool_,  toolIcon_);
}

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//===========================================================================
// Button Slots
//===========================================================================
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void MeshRepairPlugin::slotRemoveSelectedVal3Vertices() {
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  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
      removeSelectedVal3Vertices(o_it->id());
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  emit updateView();
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}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotRemoveSelectedEdges(){
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  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it) 
    removeSelectedEdges(o_it->id());
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  emit updateView();
}

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//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotDetectSkinnyTriangleByAngle()
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{
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  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
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    detectSkinnyTriangleByAngle( o_it->id(), tool_->capAngleSpinbox->value(), false );
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  emit updateView();
}

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//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotRemoveSkinnyTriangleByAngle()
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{
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  //rewrite!!!
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  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
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    detectSkinnyTriangleByAngle( o_it->id(), tool_->capAngleSpinbox->value(), true );
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  emit updateView();
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotDetectFoldover() {

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  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
      detectFoldover(o_it->id(), tool_->detectFoldoverSpinbox->value());
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  emit updateView();
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}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotDetectTriangleAspect() {

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  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
      detectTriangleAspect(o_it->id(), tool_->triangleAspectSpinbox->value());
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  emit updateView();
}

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//-----------------------------------------------------------------------------
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void MeshRepairPlugin::slotFlipOrientation(){

  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    flipOrientation(o_it->id());

  emit updateView();
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotUpdateVertexNormals() {
  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    updateVertexNormals(o_it->id());

  emit updateView();
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotUpdateFaceNormals() {
  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    updateFaceNormals(o_it->id());

  emit updateView();
}

//-----------------------------------------------------------------------------

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void MeshRepairPlugin::slotUpdateHalfedgeNormals() {
  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    updateHalfedgeNormals(o_it->id());

  emit updateView();
}

//-----------------------------------------------------------------------------

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void MeshRepairPlugin::slotUpdateNormals(){
  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    updateNormals(o_it->id());

  emit updateView();
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotDetectEdgesShorter(){
  double length = tool_->edgeSpin->value();

  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    selectEdgesShorterThan(o_it->id(),length);

  emit updateView();
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotDetectEdgesLonger(){
  double length = tool_->edgeSpin->value();

  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    selectEdgesLongerThan(o_it->id(),length);

  emit updateView();
}

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//-----------------------------------------------------------------------------

void MeshRepairPlugin::slotDetectFlatValence3Vertices() {
  double angle = tool_->valenceThreeSpinbox->value();

  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::TARGET_OBJECTS,DataType( DATA_TRIANGLE_MESH | DATA_POLY_MESH ) );  o_it != PluginFunctions::objectsEnd(); ++o_it)
    detectFlatValence3Vertices(o_it->id(), angle);

  emit updateView();
}

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//-----------------------------------------------------------------------------

/** \brief Initialization of the plugin when it is loaded by the core
 *
 */
void MeshRepairPlugin::pluginsInitialized() {

  emit setSlotDescription("updateFaceNormals(int)",tr("Recompute Face normals"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

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  emit setSlotDescription("updateHalfedgeNormals(int)",tr("Recompute Halfedge normals"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

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  emit setSlotDescription("updateVertexNormals(int)",tr("Recompute Vertex normals"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

  emit setSlotDescription("updateNormals(int)",tr("Recompute Face and Vertex normals"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

  emit setSlotDescription("flipOrientation(int)",tr("Flips the normals of all faces by changing the vertex order in each face"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

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  emit setSlotDescription("removeSelectedEdges(int)",tr("Remove the selected edges"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

  emit setSlotDescription("removeSelectedVal3Vertices(int)",tr("Remove all selected valence 3 vertices"),
                          QStringList(tr("objectId")),
                          QStringList(tr("ID of an object")));

  emit setSlotDescription("detectFoldover(int,float)",tr("Selects edges that are incident to folded over faces."),
                              QString(tr("objectId,angle")).split(","),
                              QString(tr("ID of an object;Minimum threshold angle for fold-overs")).split(";"));

  emit setSlotDescription("detectTriangleAspect(int,float)",tr("Selects all vertices that have a minimum aspect."),
                              QString(tr("objectId,aspect")).split(","),
                              QString(tr("ID of an object;The minimum aspect ratio")).split(";"));
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  emit setSlotDescription("selectEdgesShorterThan(int,double)",tr("Selects all edges of an object which are shorter than the given length"),
                              QString(tr("objectId,length")).split(","),
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                              QString(tr("ID of an object;All edges shorter than this length will be selected")).split(";"));
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  emit setSlotDescription("selectEdgesLongerThan(int,double)",tr("Selects all edges of an object which are longer than the given length"),
                              QString(tr("objectId,length")).split(","),
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                              QString(tr("ID of an object;All edges longer than this length will be selected")).split(";"));
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  emit setSlotDescription("detectFlatValence3Vertices(int,double)",tr("Selects all vertices that have valence 3 and the normals of their neighboring faces have an angle less then the given angle"),
                              QString(tr("objectId,angle")).split(","),
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                              QString(tr("ID of an object;the maximal angle between the adjacent faces")).split(";"));

  emit setSlotDescription("detectSkinnyTriangleByAngle(int,double,bool)",tr("Select or remove skinny triangles. Whether a triangle is skinny is determined by a minimum angle threshold."),
                              QString(tr("objectId,angle,remove")).split(","),
                              QString(tr("ID of an object;Minimum angle threshold")).split(";"));
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}



//===========================================================================
// Scriptable functions
//===========================================================================

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void MeshRepairPlugin::removeSelectedVal3Vertices(int _objectId) {

    unsigned int count = 0;

    // get the target mesh
    TriMesh* mesh = 0;
    PluginFunctions::getMesh(_objectId, mesh);

    if (mesh) {

        TriMesh::VertexIter v_it, v_end(mesh->vertices_end());
        TriMesh::VVIter vv_it;
        TriMesh::VFIter vf_it;
        int i;
        std::vector<TriMesh::VertexHandle> vh(3);

        for (v_it = mesh->vertices_begin(); v_it != v_end; ++v_it) {
            vf_it = mesh->vf_iter(v_it);
            if ((mesh->status(v_it).selected()) && !mesh->status(v_it).feature() && mesh->valence(v_it) == 3) {
                for (i = 0, vv_it = mesh->vv_iter(v_it); vv_it; ++vv_it, ++i)
                    vh[2 - i] = vv_it.handle();

                mesh->delete_vertex(v_it, false);
                mesh->add_face(vh);

                ++count;
            }
        }
        if (count > 0)
            mesh->garbage_collection();
    }

    if (count > 0) {
        emit updatedObject(_objectId, UPDATE_ALL);
        emit createBackup(_objectId, "Delete/merge selected vertices", UPDATE_ALL);
    }
    emit log("Deleted " + QString::number(count) + " vertices on object " + QString::number(_objectId) + ".");
}

void MeshRepairPlugin::removeSelectedEdges(int _objectId) {

    // get the target mesh
    TriMesh* triMesh = 0;

    PluginFunctions::getMesh(_objectId, triMesh);

    if (triMesh) {

        TriMesh::EdgeIter e_it, e_end = triMesh->edges_end();

        for (e_it = triMesh->edges_begin(); e_it != e_end; ++e_it) {

            if (!triMesh->status(e_it).deleted() && triMesh->status(e_it).selected()) {

                const TriMesh::VHandle v0 = triMesh->to_vertex_handle(triMesh->halfedge_handle(e_it, 0));
                const TriMesh::VHandle v1 = triMesh->to_vertex_handle(triMesh->halfedge_handle(e_it, 1));

                const bool boundary0 = triMesh->is_boundary(v0);
                const bool boundary1 = triMesh->is_boundary(v1);

                const bool feature0 = triMesh->status(v0).feature();
                const bool feature1 = triMesh->status(v1).feature();
                const bool featureE = triMesh->status(e_it).feature();

                // Collapsing v1 into vo:
                // collapse is ok, if collapsed vertex is not a feature vertex or the target vertex is a feature
                // and if we collapse along an feature edge or if the collapsed vertex is not a feature
                if ((!boundary1 || boundary0) && (!feature1 || (feature0 && featureE)) && triMesh->is_collapse_ok(
                        triMesh->halfedge_handle(e_it, 0)))
                    triMesh->collapse(triMesh->halfedge_handle(e_it, 0));
                else if ((!boundary0 || boundary1) && (!feature0 || (feature1 && featureE)) && triMesh->is_collapse_ok(
                        triMesh->halfedge_handle(e_it, 1)))
                    triMesh->collapse(triMesh->halfedge_handle(e_it, 1));
            }
        }

        triMesh->garbage_collection();
        triMesh->update_normals();

        emit updatedObject(_objectId, UPDATE_ALL);
        emit createBackup(_objectId, "Removed selected Edges", UPDATE_ALL);
        emit scriptInfo("removeSelectedEdges(" + QString::number(_objectId) + ")");

        return;
    }

    emit log(LOGERR, tr("Unsupported Object Type for edge removal"));

}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::detectSkinnyTriangleByAngle(int _objectId, double _angle, bool _remove) {
    // get the target mesh
    TriMesh* triMesh = 0;

    PluginFunctions::getMesh(_objectId, triMesh);

    if (triMesh) {

        // Clear current edge selection
        MeshSelection::clearEdgeSelection(triMesh);

        double maxAngle = cos(_angle * M_PI / 180.0);
        double angle = 0.0;
        TriMesh::EdgeIter e_it, e_end = triMesh->edges_end();

        for (e_it = triMesh->edges_begin(); e_it != e_end; ++e_it) {

            // Check prerequisites
            if (!triMesh->status(e_it).deleted() && !triMesh->status(e_it).feature() && triMesh->is_flip_ok(e_it)) {

                // For both halfedges
                for (unsigned int h = 0; h < 2; ++h) {
                    TriMesh::HalfedgeHandle hh = triMesh->halfedge_handle(e_it.handle(), h);
                    const TriMesh::Point& a = triMesh->point(triMesh->from_vertex_handle(hh));
                    const TriMesh::Point& b = triMesh->point(triMesh->to_vertex_handle(hh));
                    hh = triMesh->next_halfedge_handle(hh);
                    const TriMesh::Point& c = triMesh->point(triMesh->to_vertex_handle(hh));

                    angle = ((a - c).normalize() | (b - c).normalize());

                    if (angle < maxAngle) {

                        // selcet it
                        triMesh->status(e_it).set_selected(true);

                        // remove it if requested
                        if (_remove)
                            triMesh->flip(e_it);
                    }
                }
            }
        }

        if (_remove) {
            emit updatedObject(_objectId, UPDATE_ALL);
            emit createBackup(_objectId, tr("Removed cap edges"), UPDATE_ALL);
        } else {
            emit updatedObject(_objectId, UPDATE_SELECTION);
            emit createBackup(_objectId, tr("Selected cap edges"), UPDATE_ALL);
        } emit
        scriptInfo(
                "detectSkinnyTriangleByAngle(" + QString::number(_objectId) + "," + QString::number(_angle) + ","
                        + _remove + ")");

        return;
    }

    emit log(LOGERR, tr("Unsupported Object Type for Cap detection!"));
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::detectFoldover(int _objectId, float _angle) {

    // get the target mesh
    TriMeshObject* trimesh_o = 0;
    PolyMeshObject* polymesh_o = 0;

    PluginFunctions::getObject(_objectId, trimesh_o);
    PluginFunctions::getObject(_objectId, polymesh_o);

    unsigned int count = 0;

    if (trimesh_o != 0) {

        // get the target mesh
        TriMesh* mesh = trimesh_o->mesh();

        if (mesh) {

            // Clear current edge selection
            MeshSelection::clearEdgeSelection(mesh);

            TriMesh::EdgeIter e_it, e_end(mesh->edges_end());
            TriMesh::FaceHandle fh;
            TriMesh::Scalar a, cosa = cos(_angle / 180.0 * M_PI);

            for (e_it = mesh->edges_begin(); e_it != e_end; ++e_it) {
                if (!mesh->is_boundary(e_it)) {
                    a = (mesh->normal(mesh->face_handle(mesh->halfedge_handle(e_it, 0))) | mesh->normal(
                            mesh->face_handle(mesh->halfedge_handle(e_it, 1))));

                    if (a < cosa) {
                        mesh->status(mesh->edge_handle(mesh->halfedge_handle(e_it, 0))). set_selected(true);
                        ++count;
                    }
                }
            }
        }
    } else if (polymesh_o != 0) {

        // get the target mesh
        PolyMesh* mesh = polymesh_o->mesh();

        if (mesh) {

            // Clear current edge selection
            MeshSelection::clearEdgeSelection(mesh);

            PolyMesh::EdgeIter e_it, e_end(mesh->edges_end());
            PolyMesh::FaceHandle fh;
            PolyMesh::Scalar a, cosa = cos(_angle / 180.0 * M_PI);

            for (e_it = mesh->edges_begin(); e_it != e_end; ++e_it) {
                if (!mesh->is_boundary(e_it)) {
                    a = (mesh->normal(mesh->face_handle(mesh->halfedge_handle(e_it, 0))) | mesh->normal(
                            mesh->face_handle(mesh->halfedge_handle(e_it, 1))));

                    if (a < cosa) {
                        mesh->status(mesh->edge_handle(mesh->halfedge_handle(e_it, 0))). set_selected(true);
                        ++count;
                    }
                }
            }
        }
    }

    if (count > 0) {
        emit updatedObject(_objectId, UPDATE_SELECTION);
        emit createBackup(_objectId, "Select edges", UPDATE_SELECTION);
        emit scriptInfo("detectFoldover(" + QString::number(_objectId) + ", " + QString::number(_angle) + ")");
    }
    emit log(
            "Selected " + QString::number(count) + " fold-overs on object " + QString::number(_objectId)
                    + " with angle greater than " + QString::number(_angle) + ".");
}

//-----------------------------------------------------------------------------

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void MeshRepairPlugin::updateFaceNormals(int _objectId) {
  BaseObjectData* object = 0;
  PluginFunctions::getObject(_objectId,object);

  if ( object == 0) {
    emit log(LOGERR,tr("updateFaceNormals: Unable to get object %1. ").arg(_objectId) );
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    return;
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  }

  if ( object->dataType(DATA_TRIANGLE_MESH) ) {
    TriMesh* mesh = PluginFunctions::triMesh(object);
    mesh->update_face_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated Face Normals", UPDATE_ALL);
    emit scriptInfo( "updateFaceNormals(" + QString::number(_objectId) + ")" );
  } else if ( object->dataType(DATA_POLY_MESH) ) {
    PolyMesh* mesh = PluginFunctions::polyMesh(object);
    mesh->update_face_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated Face Normals", UPDATE_ALL);
    emit scriptInfo( "updateFaceNormals(" + QString::number(_objectId) + ")" );
  } else
    emit log(LOGERR,tr("updateFaceNormals: MeshRepair only works on triangle and poly meshes!") );

}

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//-----------------------------------------------------------------------------

void MeshRepairPlugin::updateHalfedgeNormals(int _objectId) {
  BaseObjectData* object = 0;
  PluginFunctions::getObject(_objectId,object);

  if ( object == 0) {
    emit log(LOGERR,tr("updateFaceNormals: Unable to get object %1. ").arg(_objectId) );
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    return;
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  }

  if ( object->dataType(DATA_TRIANGLE_MESH) ) {
    TriMesh* mesh = PluginFunctions::triMesh(object);
    mesh->request_halfedge_normals();
    mesh->update_halfedge_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated Face Normals", UPDATE_ALL);
    emit scriptInfo( "updateFaceNormals(" + QString::number(_objectId) + ")" );
  } else if ( object->dataType(DATA_POLY_MESH) ) {
    PolyMesh* mesh = PluginFunctions::polyMesh(object);
    mesh->request_halfedge_normals();
    mesh->update_halfedge_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated Face Normals", UPDATE_ALL);
    emit scriptInfo( "updateFaceNormals(" + QString::number(_objectId) + ")" );
  } else
    emit log(LOGERR,tr("updateFaceNormals: MeshRepair only works on triangle and poly meshes!") );

}


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//-----------------------------------------------------------------------------


void MeshRepairPlugin::updateVertexNormals(int _objectId){
  BaseObjectData* object = 0;
  PluginFunctions::getObject(_objectId,object);

  if ( object == 0) {
    emit log(LOGERR,tr("updateVertexNormals: Unable to get object %1. ").arg(_objectId) );
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    return;
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  }

  if ( object->dataType(DATA_TRIANGLE_MESH) ) {
    TriMesh* mesh = PluginFunctions::triMesh(object);
    mesh->update_vertex_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated Vertex Normals", UPDATE_ALL);
    emit scriptInfo( "updateVertexNormals(" + QString::number(_objectId) + ")" );
  } else if ( object->dataType(DATA_POLY_MESH) ) {
    PolyMesh* mesh = PluginFunctions::polyMesh(object);
    mesh->update_vertex_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated Vertex Normals", UPDATE_ALL);
    emit scriptInfo( "updateVertexNormals(" + QString::number(_objectId) + ")" );
  } else
    emit log(LOGERR,tr("updateVertexNormals: MeshRepair only works on triangle and poly meshes!") );
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::updateNormals(int _objectId) {
  BaseObjectData* object = 0;
  PluginFunctions::getObject(_objectId,object);

  if ( object == 0) {
    emit log(LOGERR,tr("updateNormals: Unable to get object %1. ").arg(_objectId) );
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  }

  if ( object->dataType(DATA_TRIANGLE_MESH) ) {
    TriMesh* mesh = PluginFunctions::triMesh(object);
    mesh->update_normals();
    emit scriptInfo( "updateNormals(" + QString::number(_objectId) + ")" );
  } else if ( object->dataType(DATA_POLY_MESH) ) {
    PolyMesh* mesh = PluginFunctions::polyMesh(object);
    mesh->update_normals();
    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Updated All Normals", UPDATE_ALL);
    emit scriptInfo( "updateNormals(" + QString::number(_objectId) + ")" );
  } else
    emit log(LOGERR,tr("updateNormals: MeshRepair only works on triangle and poly meshes!") );
}

//-----------------------------------------------------------------------------

void
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MeshRepairPlugin::detectTriangleAspect(int _objectId, float _aspect) {

    // get the target mesh
    TriMesh* mesh = 0;

    PluginFunctions::getMesh(_objectId, mesh);

    if (mesh) {

        unsigned int count(0);

        // Clear current face selection
        MeshSelection::clearFaceSelection(mesh);

        TriMesh::FaceIter f_it, f_end(mesh->faces_end());
        TriMesh::FVIter fv_it;
        TriMesh::FEIter fe_it;

        for (f_it = mesh->faces_begin(); f_it != f_end; ++f_it) {
            fv_it = mesh->fv_iter(f_it);

            const TriMesh::Point& p0 = mesh->point(fv_it);
            const TriMesh::Point& p1 = mesh->point(++fv_it);
            const TriMesh::Point& p2 = mesh->point(++fv_it);

            if (ACG::Geometry::aspectRatio(p0, p1, p2) > _aspect) {
                mesh->status(f_it).set_selected(true);
                ++count;
            }
        }
        if (count > 0) {
            emit updatedObject(_objectId, UPDATE_SELECTION);
            emit createBackup(_objectId, "Select triangles", UPDATE_SELECTION);
            emit scriptInfo( "detectTriangleAspect(" + QString::number(_objectId) + ", " + QString::number(_aspect) + ")" );
        }
        emit log(
                "Selected " + QString::number(count) + " triangles on object " + QString::number(_objectId)
                        + " with aspect ratio greater than " + QString::number(_aspect) + ".");
    } else {
        emit log("Cannot detect skinny triangles on non-trimesh " + QString::number(_objectId) + ".");
    }
}

//-----------------------------------------------------------------------------

void
MeshRepairPlugin::flipOrientation(int _objectId) {

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  // get the target mesh
  TriMesh* triMesh = 0;

  PluginFunctions::getMesh(_objectId,triMesh);

  if ( triMesh ) {

    TriMesh::FaceIter f_it, f_end=triMesh->faces_end();

    std::vector< TriMesh::VertexHandle > handles;
    handles.reserve( triMesh->n_faces() * 3 );

    for (f_it = triMesh->faces_begin(); f_it != f_end ; ++f_it) {

      if (triMesh->status(f_it).selected()) {
        // Collect vertex handles
        TriMesh::FaceVertexIter fv_it = triMesh->fv_iter(f_it);
        handles.push_back( fv_it.handle() );
        ++fv_it;
        handles.push_back( fv_it.handle() );
        ++fv_it;
        handles.push_back( fv_it.handle() );

        // delete the corresponding face
        triMesh->delete_face(f_it, false);
      }
    }

    // clean the mesh
    triMesh->garbage_collection();

    // read the faces
    for (uint i=0; i < handles.size(); i += 3)
      triMesh->add_face(handles[ i + 2 ],handles[ i + 1 ],handles[ i + 0 ]);

    triMesh->update_normals();

    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Flipped Normals", UPDATE_ALL);
    emit scriptInfo( "flipOrientation(" + QString::number(_objectId) + ")" );

    return;
  }

  // get the target mesh
  PolyMesh* polyMesh = 0;

  PluginFunctions::getMesh(_objectId,polyMesh);

  if ( polyMesh ) {

    PolyMesh::FaceIter f_it, f_end=polyMesh->faces_end();

    std::vector< PolyMesh::VertexHandle > handles;
    std::vector< uint > valence;
    // Reserve for a quad mesh, might be to small!
    handles.reserve( polyMesh->n_faces() * 4 );
    valence.reserve( polyMesh->n_faces() );


    for (f_it = polyMesh->faces_begin(); f_it != f_end ; ++f_it) {

      // Collect vertex handles
      PolyMesh::FaceVertexIter fv_it = polyMesh->fv_iter(f_it);

      valence.push_back( polyMesh->valence(f_it) );
      while( fv_it) {
        handles.push_back( fv_it.handle() );
        ++fv_it;
      }

      // delete the corresponding face
      polyMesh->delete_face(f_it, false);
    }

    // clean the mesh
    polyMesh->garbage_collection();

    // read the faces
    uint pos = 0;
    for (uint i=0; i < valence.size(); i++) {

      std::vector< PolyMesh::VertexHandle > faceVertices;

      pos += valence[i];

      // add valence vertices in the inverse order
      for (uint j = 1 ; j <= valence[i] ; ++j )
        faceVertices.push_back(handles[pos - j]);

      polyMesh->add_face(faceVertices);
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    }

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    polyMesh->update_normals();

    emit updatedObject(_objectId, UPDATE_ALL);
    emit createBackup( _objectId, "Flipped Normals", UPDATE_ALL);
    emit scriptInfo( "flipOrientation(" + QString::number(_objectId) + ")" );

    return;
  }


  emit log( LOGERR,tr("Unsupported Object Type for normal flipping!") );
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::selectEdgesShorterThan(int _objectId,double _length) {
  selectionEdgeLength(_objectId,_length,false);

  emit scriptInfo( "selectEdgesShorterThan(" + QString::number(_objectId) + ", " + QString::number(_length) + ")" );
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::selectEdgesLongerThan(int _objectId,double _length) {
  selectionEdgeLength(_objectId,_length,true);

  emit scriptInfo( "selectEdgesLongerThan(" + QString::number(_objectId) + ", " + QString::number(_length) + ")" );
}

//-----------------------------------------------------------------------------

void MeshRepairPlugin::selectionEdgeLength(int _objectId, double _length, bool _larger) {

  // get the target mesh
  TriMesh* triMesh = 0;

  PluginFunctions::getMesh(_objectId,triMesh);

  if ( triMesh ) {
    TriMesh::EdgeIter e_it, e_end=triMesh->edges_end();

    // Clear current edge selection
    MeshSelection::clearEdgeSelection(triMesh);

    // Iterate over all edges
    for (e_it = triMesh->edges_begin(); e_it != e_end ; ++e_it) {
      TriMesh::HalfedgeHandle he = triMesh->halfedge_handle( e_it, 0 );
      TriMesh::Point p1 = triMesh->point( triMesh->from_vertex_handle( he ) );
      TriMesh::Point p2 = triMesh->point( triMesh->to_vertex_handle( he )   );

      if ( _larger ) {
        if ( (p1 - p2).norm() > _length)
          triMesh->status(e_it).set_selected(true);
      } else {
        if ( (p1 - p2).norm() < _length)
          triMesh->status(e_it).set_selected(true);
      }
    }

    emit updatedObject(_objectId,UPDATE_SELECTION);
    emit createBackup( _objectId, "Select Edges", UPDATE_SELECTION);

    return;
  }

  // get the target mesh
  PolyMesh* polyMesh = 0;
  PluginFunctions::getMesh(_objectId,polyMesh);

  if ( polyMesh ) {
    PolyMesh::EdgeIter e_it, e_end=polyMesh->edges_end();

    // Clear current edge selection
    MeshSelection::clearEdgeSelection(polyMesh);

    // Iterate over all edges
    for (e_it = polyMesh->edges_begin(); e_it != e_end ; ++e_it) {
      PolyMesh::HalfedgeHandle he = polyMesh->halfedge_handle( e_it, 0 );
      PolyMesh::Point p1 = polyMesh->point( polyMesh->from_vertex_handle( he ) );
      PolyMesh::Point p2 = polyMesh->point( polyMesh->to_vertex_handle( he )   );

      if ( _larger ) {
        if ( (p1 - p2).norm() > _length)
          polyMesh->status(e_it).set_selected(true);
      } else {
        if ( (p1 - p2).norm() < _length)
          polyMesh->status(e_it).set_selected(true);
      }
    }

    emit updatedObject(_objectId,UPDATE_SELECTION);
    emit createBackup( _objectId, "Select Edges", UPDATE_SELECTION);

    return;
  }

  emit log( LOGERR,tr("Unsupported Object Type for edge selection") );

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}

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//-----------------------------------------------------------------------------

void MeshRepairPlugin::detectFlatValence3Vertices(int _objectId, double _angle) {

  unsigned int count(0);

  // get the target mesh
  TriMesh* mesh = 0;
  PluginFunctions::getMesh(_objectId,mesh);

  if ( mesh ) {

    // Clear current triangle selection
    MeshSelection::clearVertexSelection(mesh);

    TriMesh::VertexIter                 v_it, v_end(mesh->vertices_end());
    TriMesh::VVIter                     vv_it;
    TriMesh::VFIter                     vf_it;
    TriMesh::FaceHandle                 fh;
    std::vector<TriMesh::VertexHandle>  vh(3);
    TriMesh::Scalar                     cosangle(cos(_angle/180.0*M_PI));

    for (v_it=mesh->vertices_begin(); v_it!=v_end; ++v_it)
    {
      if (!mesh->status(v_it).deleted() && !mesh->is_boundary(v_it) && mesh->valence(v_it) == 3)
      {
        vf_it = mesh->vf_iter(v_it);
        const TriMesh::Normal& n0 = mesh->normal(vf_it);
        const TriMesh::Normal& n1 = mesh->normal(++vf_it);
        const TriMesh::Normal& n2 = mesh->normal(++vf_it);

        if ( (n0|n1) > cosangle &&
             (n0|n2) > cosangle &&
             (n1|n2) > cosangle )
        {

          mesh->status(v_it).set_selected(true);
          ++count;
        }
      }
    }
  }
  else {
    emit log(LOGERR, "Cannot detect flat triangles on non-trimesh " + QString::number(_objectId) + ".");
  }

  if (count > 0) {
    emit updatedObject(_objectId, UPDATE_SELECTION);
    emit createBackup(_objectId, "Select vertices", UPDATE_SELECTION);
  }

  emit log (LOGINFO,"Selected " + QString::number(count) + " vertices on object " + QString::number(_objectId) + " with face angle difference smaller than " + QString::number(_angle) + ".");
  emit scriptInfo( "detectFlatValence3Vertices(" + QString::number(_objectId) + ", " + QString::number(_angle) + ")" );

}

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//-----------------------------------------------------------------------------

Q_EXPORT_PLUGIN2( meshrepairplugin , MeshRepairPlugin );